Product Folder Sample & Buy Support & Community Tools & Software Technical Documents bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 bq2419x I2C Controlled 4.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG 1 1 Features * * * * * * * * * * * High Efficiency 4.5-A Switch Mode Charger - 92% Charge Efficiency at 2 A, 90% at 4 A - Accelerate Charge Time by Battery Path Impedance Compensation Compatible with MaxLife Technology for Faster Charging When Used in Conjunction With bq27531 Highest Battery Discharge Efficiency with 12-m Battery Discharge MOSFET up to 9-A Discharge Current Single Input USB-compliant/Adapter Charger - USB Host or Charging Port D+/D- Detection Compatible to USB Battery Charger Spec 1.2 - Input Voltage and Current Limit Supports USB2.0 and USB3.0 - Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA, 1.2 A, 1.5 A, 2 A and 3 A 3.9-V to 17-V Input Operating Voltage Range - Support All Kinds of Adapter with Input Voltage DPM Regulation USB OTG 5 V at 1.3-A Synchronous Boost Converter Operation - 93% 5-V Boost Efficiency at 1 A Narrow VDC (NVDC) Power Path Management - Instant-on Works with No Battery or Deeply Discharged Battery - Ideal Diode Operation in Battery Supplement Mode 1.5-MHz Switching Frequency for Low Profile Inductor Autonomous Battery Charging with or without Host Management - Battery Charge Enable - Battery Charge Preconditioning - Charge Termination and Recharge High Accuracy (0C to 125C) - 0.5% Charge Voltage Regulation - 7% Charge Current Regulation - 7.5% Input Current Regulation - 2% Output Regulation in Boost Mode High Integration - Power Path Management - Synchronous Switching MOSFETs * * * * - Integrated Current Sensing - Bootstrap Diode - Internal Loop Compensation Safety - Battery Temperature Sensing and Charging Safety Timer - Thermal Regulation and Thermal Shutdown - Input System Over-Voltage Protection - MOSFET Over-Current Protection Charge Status Outputs for LED or Host Processor Low Battery Leakage Current and Support Shipping Mode 4.00 mm x 4.00 mm VQFN-24 Package 2 Applications * * * * Tablet PC and Smart Phone Portable Audio Speaker Portable Media Players Internet Devices 3 Description The bq24190, bq24192, and bq24192I are highlyintegrated switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer battery in a wide range of tablet and other portable devices. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) bq24190 bq24192 VQFN (24) 4.00 mm x 4.00 mm bq24192I (1) For all available packages, see the orderable addendum at the end of the datasheet. bq24190 5V USB SDP/DCP 1H 10F 47nF 6.8F USB SYS: 3.5V-4.35V SW VBUS PMID 1F 10F 10F 10F BTST REGN D+ 4.7F D- SYS PGND 2.2kW STAT VREF SYS BAT 10kW Host 10kW 353W 10F (1.5A max) 10kW SDA SCL INT OTG CE ILIM REGN 5.52kW TS1 TS2 31.23kW Power Pad 10kW (103-AT) 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 9 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Description (Continued) ........................................ Device Comparison Table..................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 3 4 5 8.1 8.2 8.3 8.4 8.5 8.6 5 6 6 6 6 9 Absolute Maximum Ratings ...................................... ESD Ratings ............................................................ Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Typical Characteristics .............................................. Detailed Description ............................................ 12 9.1 Overview ................................................................. 12 9.2 Functional Block Diagram ....................................... 12 9.3 Feature Description................................................. 13 9.4 Device Functional Modes........................................ 27 9.5 Register Map........................................................... 28 10 Application and Implementation........................ 36 10.1 Application Information.......................................... 36 10.2 Typical Application ................................................ 36 11 Power Supply Recommendations ..................... 41 12 Layout................................................................... 41 12.1 Layout Guidelines ................................................. 41 12.2 Layout Example .................................................... 42 13 Device and Documentation Support ................. 43 13.1 13.2 13.3 13.4 13.5 Documentation Support ....................................... Related Links ........................................................ Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 43 43 43 43 43 14 Mechanical, Packaging, and Orderable Information ........................................................... 44 4 Revision History Changes from Revision A (October 2012) to Revision B Page * Aligned package description throughout datasheet................................................................................................................ 1 * Added ESD Ratings, Feature Description, Device Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, Mechanical, Packaging, Orderable Information. ........... 1 * Added Feature: Compatible with MaxLife Technology for Faster Charging When Used in Conjunction With bq27531 ....... 1 * Changed VSLEEPZ, VBAT_DPL_HY, VBATGD , ICHG_20pct, VSHORT, IADPT_DPM, KILIM, VBTST_REFRESH in Electrical Characteristics.......... 6 * Added -40C to 85 to IBAT Test Condition............................................................................................................................. 6 * Added REG00[6:3] = 0110 (4.36 V) or 1011 (4.76 V) to VINDPM_REG_ACC Test Conditions...................................................... 8 * Added Typical input current of 1.5 A based on KLIM to IADPT_DPM Test Conditions ............................................................... 8 * Added a MIN value of 435 to KILIM.......................................................................................................................................... 8 * Deleted TJunction_REG MIN and MAX ......................................................................................................................................... 8 * Added rising to VHTF parameter ............................................................................................................................................. 8 * Deleted VREGN, VVBUS = 5 V, IREGN = 20 mA MAX value ......................................................................................................... 9 * Changed Functional Block Diagram ..................................................................................................................................... 12 * Changed Charging Current in Table 4 ................................................................................................................................. 18 * Changed REG09[5:4] to REG08[5:4] in Charging Termination section ............................................................................... 21 * Added or when FORCE_20PCT (REG02[0]) bit is set, to Charging Safety Timer description ............................................ 22 * Added last paragraph to Charging Safety Timer description................................................................................................ 22 * Added twice to Host Mode and Default Mode description ................................................................................................... 27 * Changed REG05[5:4]=11 to REG05[5:4]=00 in Host Mode and Default Mode description................................................. 27 * Changed Charge Current Control Register REG02 Bit 0 description .................................................................................. 31 * Changed Charge Current Control Register REG02 Bit 0 note............................................................................................. 31 * Changed REG05 Bit 0 from JEITA ISET (0C-10C) to Reserved ...................................................................................... 32 * Changed REG07 Bit 4 from JEITA_VSET (45C to 60C) to Reserved .............................................................................. 33 * Changed BOOT to BTST in Figure 38 ................................................................................................................................. 37 * Changed BOOT to BTST in Figure 39 ................................................................................................................................. 37 * Changed bq24193 to bq24192 in Figure 42......................................................................................................................... 39 2 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 5 Description (Continued) Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution. The device supports a wide range of input sources, including standard USB host port, USB charging port and high power DC adapter. To set the default input current limit, the bq24190 detects the input source following the USB battery charging spec 1.2, and the bq24192 and bq24192I take the results from detection circuit in the system, such as USB PHY device. The bq24190,192, and 192I are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. Meanwhile, the bq24190, bq24192, and bq24192I meet USB On-the-Go operation power rating specification by supplying 5 V on the VBUS with a current limit up to 1.3 A. The power path management regulates the system slightly above battery voltage but does not drop below 3.5-V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This supplement mode operation prevents overloading the input source. The devices initiate and complete a charging cycle without software control. It automatically detects the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle. The bq24190, bq24192, and bq24192I provide various safety features for battery charging and system operation, including dual pack negative thermistor monitoring, charging safety timer and over-voltage/over-current protections. The thermal regulation reduces charge current when the junction temperature exceeds 120C (programmable). The STAT output reports the charging status and any fault conditions. The PG output in the bq24192 and bq24192I indicates if a good power source is present. The INT immediately notifies the host when a fault occurs. The bq24190, bq24192, and bq24192I are available in a 24-pin, 4.00 x 4.00 mm2 thin VQFN package. 6 Device Comparison Table bq24190 bq24192 bq24192I 6BH 6BH 6BH I2C Address USB Detection D+/D- PSEL PSEL Default VINDPM 4.36 V 4.36 V 4.44 V Default Battery Voltage 4.208 V 4.208 V 4.112 V 1.024 A Default Charge Current 2.048 A 2.048 A Default Adapter Current Limit 1.5 A 3A 1.5 A Maximum Pre-Charge Current 2.048 A 2.048 A 640 mA Charging Temperature Profile Cold/Hot 2 TS pins Cold/Hot 2 TS pins Cold/Hot 2 TS pins Status Output STAT STAT, PG STAT, PG STAT During Fault Blinking at 1 Hz Blinking at1 Hz 10 k to ground Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 3 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 7 Pin Configuration and Functions VBUS PMID REGN BTST SW SW VBUS PMID REGN BTST SW SW RGE Package 24-Pin VQFN With Exposed Thermal Pad (Top View) 24 23 22 21 20 19 24 23 22 21 20 19 VBUS 1 18 PGND VBUS 1 18 PGND D+ 2 17 PGND PSEL 2 17 PGND D- 3 16 SYS 16 SYS 15 SYS PG 3 bq24192 bq24190 STAT 4 15 SYS STAT 4 bq24192I BAT SDA 13 BAT SDA 6 13 BAT 8 9 10 11 OTG CE ILIM TS1 12 TS2 7 INT 6 7 8 9 10 11 12 TS2 14 TS1 5 ILIM SCL CE BAT OTG 14 INT SCL 5 Blue pins indicate difference in pin names/functionality between devices. Pin Functions PIN bq24190 bq24192 bq24192I NUMBER TYPE DESCRIPTION VBUS VBUS 1,24 P Charger Input Voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and PMID with VBUS on source. Place a 1-F ceramic capacitor from VBUS to PGND and place it as close as possible to IC. (Refer to Application Information Section for details) D+ - 2 I Analog Positive line of the USB data line pair. D+/D- based USB host/charging port detection. The detection includes data contact detection (DCD) and primary detection in bc1.2. - PSEL 2 I Digital Power source selection input. High indicates a USB host source and Low indicates an adapter source. D- - 3 I Analog Negative line of the USB data line pair. D+/D- based USB host/charging port detection. The detection includes data contact detection (DCD) and primary detection in bc1.2. - PG 3 O Digital Open drain active low power good indicator. Connect to the pull up rail via 10-k resistor. LOW indicates a good input source if the input voltage is between UVLO and ACOV, above SLEEP mode threshold, and current limit is above 30 mA. STAT STAT 4 O Digital Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10-k. LOW indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition occurs, STAT pin in bq24190, bq24192 blinks at 1 Hz, and STAT pin in bq24192I has a 10-k resistor to ground. SCL SCL 5 I Digital I2C Interface clock. Connect SCL to the logic rail through a 10-k resistor. SDA SDA 6 I/O Digital I2C Interface data. Connect SDA to the logic rail through a 10-k resistor. INT INT 7 O Digital Open-drain Interrupt Output. Connect the INT to a logic rail via 10-k resistor. The INT pin sends active low, 256-us pulse to host to report charger device status and fault. 8 I Digital 9 I Digital USB current limit selection pin during buck mode, and active high enable pin during boost mode. OTG OTG In buck mode with USB host (PSEL=High), when OTG = High, IIN limit = 500 mA and when OTG = Low, IIN limit = 100 mA. The boost mode is activated when the REG01[5:4] = 10 and OTG pin is High. CE 4 CE Submit Documentation Feedback Active low Charge Enable pin. Battery charging is enabled when REG01[5:4] = 01 and CE pin = Low. CE pin must be pulled high or low. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 Pin Functions (continued) PIN bq24190 bq24192 bq24192I NUMBER TYPE DESCRIPTION ILIM ILIM 10 I Analog ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 1 V. A resistor is connected from ILIM pin to ground to set the maximum limit as IINMAX = (1V/RILIM) x 530. The actual input current limit is the lower one set by ILIM and by I2C REG00[2:0]. The minimum input current programmed on ILIM pin is 500 mA. TS1 TS1 11 I Analog Temperature qualification voltage input #1. Connect a negative temperature coefficient thermistor. Program temperature window with a resistor divider from REGN to TS1 to GND. Charge suspends when either TS pin is out of range. Recommend 103AT-2 thermistor. TS2 TS2 12 I Analog Temperature qualification voltage input #2. Connect a negative temperature coefficient thermistor. Program temperature window with a resistor divider from REGN to TS2 to GND. Charge suspends when either TS pin is out of range. Recommend 103AT-2 thermistor. BAT BAT 13,14 P Battery connection point to the positive terminal of the battery pack. The internal BATFET is connected between BAT and SYS. Connect a 10 F closely to the BAT pin. SYS SYS 15,16 P System connection point. The internal BATFET is connected between BAT and SYS. When the battery falls below the minimum system voltage, switch-mode converter keeps SYS above the minimum system voltage. (Refer to Application Information Section for inductor and capacitor selection.) PGND PGND 17,18 P Power ground connection for high-current power converter node. Internally, PGND is connected to the source of the n-channel LSFET. On PCB layout, connect directly to ground connection of input and output capacitors of the charger. A single point connection is recommended between power PGND and the analog GND near the IC PGND pin. SW SW 19,20 O Analog BTST BTST 21 P PWM high side driver positive supply. Internally, the BTST is connected to the anode of the boost-strap diode. Connect the 0.047-F bootstrap capacitor from SW to BTST. REGN REGN 22 P PWM low side driver positive supply output. Internally, REGN is connected to the cathode of the boost-strap diode. Connect a 4.7-F (10-V rating) ceramic capacitor from REGN to analog GND. The capacitor should be placed close to the IC. REGN also serves as bias rail of TS1 and TS2 pins. PMID PMID 23 O Analog Thermal Pad - - P Switching node connecting to output inductor. Internally SW is connected to the source of the n-channel HSFET and the drain of the n-channel LSFET. Connect the 0.047-F bootstrap capacitor from SW to BTST. Connected to the drain of the reverse blocking MOSFET and the drain of HSFET. Given the total input capacitance, connect a 1-F capacitor on VBUS to PGND, and the rest all on PMID to PGND. (Refer to Application Information Section for details) Exposed pad beneath the IC for heat dissipation. Always solder thermal pad to the board, and have vias on the thermal pad plane star-connecting to PGND and ground plane for high-current power converter. 8 Specifications 8.1 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) Voltage range (with respect to GND) Output sink current MIN MAX UNIT VBUS -2 22 V PMID -0.3 22 V STAT, PG -0.3 20 V BTST -0.3 26 V -2 20 V BAT, SYS (converter not switching) -0.3 6 V SDA, SCL, INT, OTG, ILIM, REGN, TS1, TS2, CE, PSEL, D+, D- -0.3 7 V BTST TO SW -0.3 -7 V PGND to GND -0.3 -0.3 V 6 mA -40C 150 C -65 150 C SW INT, STAT, PG Junction temperature Storage temperature, Tstg (1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to the network ground terminal unless otherwise noted. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 5 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 8.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) 1000 Charged device model (CDM), per JEDEC specification JESD22C101 (2) 250 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 8.3 Recommended Operating Conditions MIN MAX UNIT 3.9 17 (1) V 3 A Output current (SYS) 4.5 A Battery voltage 4.4 V Fast charging current 4.5 A 6 (continuous) 9 (peak) (up to 1 sec duration) A 85 C VIN Input voltage IIN Input current ISYS VBAT IBAT Discharging current with internal MOSFET TA (1) Operating free-air temperature range -40 The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the BTST or SW pins. A tight layout minimizes switching noise. 8.4 Thermal Information bq2419x THERMAL METRIC (1) RJA Junction-to-ambient thermal resistance 32.2 RJCtop Junction-to-case (top) thermal resistance 29.8 RJB Junction-to-board thermal resistance 9.1 JT Junction-to-top characterization parameter 0.3 JB Junction-to-board characterization parameter 9.1 RJCbot Junction-to-case (bottom) thermal resistance 2.2 (1) UNIT RGE (24 PIN) C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. 8.5 Electrical Characteristics VVBUS_UVLOZ < VVBUS < VACOV and VVBUS > VBAT + VSLEEP, TJ = -40C to 125C and TJ = 25C for typical values unless other noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT QUIESCENT CURRENTS VVBUS < VUVLO, VBAT = 4.2 V, leakage between BAT and VBUS IBAT Battery discharge current (BAT, SW, SYS) IVBUS Input supply current (VBUS) IOTGBOOST 6 Battery discharge current in boost mode Submit Documentation Feedback 5 A High-Z Mode, or no VBUS, BATFET disabled (REG07[5] = 1), -40C to 85C 12 20 A High-Z Mode, or no VBUS, REG07[5] = 0, -40C to 85C 32 55 A VVBUS = 5 V, High-Z mode 15 30 A VVBUS = 17 V, High-Z mode 30 50 A VVBUS > VUVLO, VVBUS > VBAT, converter not switching 1.5 3 mA VVBUS > VUVLO, VVBUS > VBAT, converter switching, VBAT = 3.2 V, ISYS = 0 A 4 mA VVBUS > VUVLO, VVBUS > VBAT, converter switching, VBAT = 3.8 V, ISYS = 0 A 15 mA VBAT = 4.2 V, Boost mode, IVBUS = 0 A, converter switching 4 mA Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 Electrical Characteristics (continued) VVBUS_UVLOZ < VVBUS < VACOV and VVBUS > VBAT + VSLEEP, TJ = -40C to 125C and TJ = 25C for typical values unless other noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VBUS/BAT POWER UP VVBUS_OP VBUS operating range VVBUS_UVLOZ VBUS for active I2C, no battery VVBUS rising 3.9 3.6 17 V VSLEEP Sleep mode falling threshold VVBUS falling, VVBUS-VBAT 35 80 120 mV VSLEEPZ Sleep mode rising threshold VVBUS rising, VVBUS-VBAT VACOV VBUS over-voltage rising threshold VVBUS rising 170 250 350 mV 17.4 18 VACOV_HYST VBUS over-voltage falling hysteresis VVBUS falling V 700 mV VBAT_UVLOZ Battery for active I2C, no VBUS VBAT rising VBAT_DPL Battery depletion threshold VBAT falling 2.4 2.6 V VBAT_DPL_HY Battery depletion rising hysteresis VBAT rising 170 260 mV VVBUSMIN Bad adapter detection threshold VVBUS falling 3.8 V IBADSRC Bad adapter detection current source 30 mA tBADSRC Bad source detection duration 30 ms V 2.3 V POWER PATH MANAGEMENT VSYS_RANGE Typical system regulation voltage Isys = 0 A, Q4 off, VBAT up to 4.2 V, REG01[3:1] = 101, VSYSMIN = 3.5 V 3.5 VSYS_MIN System voltage output REG01[3:1] = 101, VSYSMIN = 3.5 V 3.55 RON(RBFET) Internal top reverse blocking MOSFET onresistance Measured between VBUS and PMID 23 38 RON(HSFET) Internal top switching MOSFET on-resistance between PMID and SW TJ = -40C to 85C 27 35 TJ = -40C to 125C 27 45 RON(LSFET) Internal bottom switching MOSFET on-resistance between SW and PGND TJ = -40C to 85C 32 45 TJ = -40C to 125C 32 48 VFWD BATFET forward voltage in supplement mode BAT discharge current 10 mA 30 mV VSYS_BAT SYS/BAT Comparator VSYS falling 90 mV VBATGD Battery good comparator rising threshold VBAT rising 3.55 V VBATGD_HYST Battery good comparator falling threshold VBAT falling 100 mV 4.35 3.65 V V m m m BATTERY CHARGER VBAT_REG_ACC Charge voltage regulation accuracy VBAT = 4.112 V and 4.208 V -0.5% 0.5% VBAT = 3.8 V, ICHG = 1792 mA, TJ = 25C -4% 4% -7% 7% IICHG_REG_ACC Fast charge current regulation accuracy VBAT = 3.8 V, ICHG = 1792 mA, TJ = -20C to 125C ICHG_20pct Charge current with 20% option on VBAT = 3.1 V, ICHG = 104 mA, REG02 = 03 75 100 150 mA VBATLOWV Battery LOWV falling threshold Fast charge to precharge, REG04[1] = 1 2.6 2.8 2.9 V VBATLOWV_HYST Battery LOWV rising threshold Precharge to fast charge, REG04[1] = 1 2.8 3.0 3.1 V IPRECHG_ACC Precharge current regulation accuracy VBAT = 2.6 V, ICHG = 256 mA -20% ITERM_ACC Termination current accuracy ITERM = 256 mA, ICHG = 960 mA -20% VSHORT Battery Short Voltage VBAT falling 2.0 V VSHORT_HYST Battery Short Voltage hysteresis VBAT rising 200 mV ISHORT Battery short current VBAT < 2.2V 100 mA VRECHG Recharge threshold below VBAT_REG VBAT falling, REG04[0] = 0 100 mV tRECHG Recharge deglitch time VBAT falling, REG04[0] = 0 20 TJ = 25C 12 15 TJ = -40C to 125C 12 20 RON_BATFET SYS-BAT MOSFET on-resistance Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I 20% 20% ms Submit Documentation Feedback m 7 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com Electrical Characteristics (continued) VVBUS_UVLOZ < VVBUS < VACOV and VVBUS > VBAT + VSLEEP, TJ = -40C to 125C and TJ = 25C for typical values unless other noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT VOLTAGE/CURRENT REGULATION VINDPM_REG_ACC Input voltage regulation accuracy USB Input current regulation limit, VBUS = 5 V, current pulled from SW IUSB_DPM REG00[6:3] = 0110 (4.36 V) or 1011 (4.76 V) -2% 2% USB100 85 100 mA USB150 125 150 mA USB500 440 500 mA USB900 750 900 mA 1.35 IADPT_DPM Input current regulation accuracy Typical input current of 1.5 A based on KLIM IIN_START Input current limit during system start up VSYS < 2.2 V KILIM IIN = KILIM/RILIM IINDPM = 1.5 A 1.5 1.65 100 A mA Ax 435 485 530 0.5 0.6 0.7 V 14 A 150 A D+/D- DETECTION VD+_SRC D+ voltage source ID+_SRC D+ connection check current source ID-_SINK D- current sink ID_LKG Leakage current into D+/D- VD+_LOW 7 50 100 D-, switch open -1 1 A D+, switch open -1 1 A D+ Low comparator threshold 0.7 0.8 V VD-_LOWdatref D- Low comparator threshold 250 400 mV RD-_DWN D- Pulldown for connection check 14.25 24.8 k tSDP_DEFAULT Charging timer with 100-mA USB host in default mode 45 mins BAT OVER-VOLTAGE PROTECTION VBATOVP Battery over-voltage threshold VBAT rising, as percentage of VBAT_REG 104% VBATOVP_HYST Battery over-voltage hysteresis VBAT falling, as percentage of VBAT_REG 2% tBATOVP Battery over-voltage deglitch time to disable charge 1 s THERMAL REGULATION AND THERMAL SHUTDOWN TJunction_REG Junction temperature regulation accuracy REG06[1:0] = 11 120 C TSHUT Thermal shutdown rising temperature Temperature increasing 160 C TSHUT_HYS Thermal shutdown hysteresis 30 C Thermal shutdown rising deglitch Temperature increasing delay 1 ms Thermal shutdown falling deglitch Temperature decreasing delay 1 ms COLD/HOT THERMISTER COMPARATOR (bq24190,bq24192,bq24192I) VLTF Cold temperature threshold, TS pin voltage rising threshold Charger suspends charge. As percentage to VREGN 73% 73.5 % 74% VLTF_HYS Cold temperature hysteresis, TS pin voltage falling As percentage to VREGN 0.2% 0.4% 0.6% 48.8% 45.2% VHTF Hot temperature TS pin voltage rising threshold As percentage to VREGN 46.6% 47.2 % VTCO Cut-off temperature TS pin voltage falling threshold As percentage to VREGN 44.2% 44.7 % Deglitch time for temperature out of range detection VTS > VLTF, or VTS < VTCO, or VTS < VHTF 10 ms 7 A CHARGE OVER-CURRENT COMPARATOR IHSFET_OCP HSFET over-current threshold IBATFET_OCP System over load threshold 5.3 9 A CHARGE UNDER-CURRENT COMPARATOR (CYCLE-BY-CYCLE) VLSFET_UCP LSFET charge under-current falling threshold From sync mode to non-sync mode 100 mA PWM OPERATION FSW PWM Switching frequency, and digital clock DMAX Maximum PWM duty cycle 8 Submit Documentation Feedback 1300 1500 1700 kHz 97% Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 Electrical Characteristics (continued) VVBUS_UVLOZ < VVBUS < VACOV and VVBUS > VBAT + VSLEEP, TJ = -40C to 125C and TJ = 25C for typical values unless other noted. PARAMETER VBTST_REFRESH TEST CONDITIONS Bootstrap refresh comparator threshold MIN TYP VBTST-VSW when LSFET refresh pulse is requested, VBUS = 5 V 3.6 VBTST-VSW when LSFET refresh pulse is requested, VBUS > 6 V 4.5 MAX UNIT V BOOST MODE OPERATION VOTG_REG OTG output voltage I(VBUS) = 0 VOTG_REG_ACC OTG output voltage accuracy I(VBUS) = 0 IOTG OTG mode output current VOTG_OVP OTG over-voltage threshold IOTG_ILIM LSFET cycle-by-cycle current limit IOTG_HSZCP HSFET under current falling threshold IRBFET_OCP RBFET over-current threshold 5.00 -2% REG01[0] = 0 0.5 REG01[0] = 1 1.3 A A 5.3 3.2 V 2% 5.5 V 4.6 A 100 mA REG01[0] = 1 1.4 1.8 2.7 REG01[0] = 0 0.6 1.1 1.8 6.4 A REGN LDO VREGN REGN LDO output voltage IREGN REGN LDO current limit VVBUS = 10 V, IREGN = 40 mA 5.6 6 VVBUS = 5 V, IREGN = 20 mA 4.75 4.8 VVBUS = 10 V, VREGN = 3.8 V V V 50 mA LOGIC I/O PIN CHARACTERISTICS (OTG, CE, PSEL, STAT, PG) VILO Input low threshold VIH Input high threshold 0.4 VOUT_LO Output low saturation voltage Sink current = 5 mA IBIAS High level leakage current Pull up rail 1.8 V 1.3 V V 0.4 V 1 A I2C INTERFACE (SDA, SCL, INT) VIH Input high threshold level VPULL-UP = 1.8 V, SDA and SCL VIL Input low threshold level VPULL-UP = 1.8 V, SDA and SCL 1.3 0.4 V VOL Output low threshold level Sink current = 5 mA 0.4 V IBIAS High-level leakage current VPULL-UP = 1.8 V, SDA and SCL 1 A fSCL SCL clock frequency 400 kHz V DIGITAL CLOCK AND WATCHDOG TIMER fHIZ Digital crude clock REGN LDO disabled 15 35 50 kHz fDIG Digital clock REGN LDO enabled 1300 1500 1700 kHz tWDT REG05[5:4] = 11 REGN LDO enabled 136 160 sec 8.6 Typical Characteristics Table 1. Table of Figures FIGURE NO. System Light Load Efficiency vs System Load Current Figure 1 SYS Voltage Regulation vs System Load Figure 2 Charging Efficiency vs Charging Current Figure 3 Boost Mode Efficiency vs VBUS Load Current Figure 4 Boost Mode VBUS Voltage Regulation vs VBUS Load Current Figure 5 SYS Voltage vs Temperature Figure 6 BAT Voltage vs Temperature Figure 7 Input Current Limit vs Temperature Figure 8 Charge Current vs Temperature Figure 9 Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 9 bq24190, bq24192, bq24192I www.ti.com 95 3.70 90 3.68 SYS Voltage (V) Efficiency (%) SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 85 80 75 3.66 3.64 3.62 VBUS = 5 V VBUS = 5 V VBUS = 17 V VBUS = 9 V 3.60 70 0 100 200 300 400 500 Load Current (mA) 0 600 2 95 4 5 C014 Figure 2. SYS Voltage Regulation vs System Load 100 VBUS = 5 V VBUS = 7 V VBUS = 9 V VBUS = 12 V VBAT = 3.2 V VBAT = 3.8 V 95 Efficiency (%) 93 3 System Load Current (A) Figure 1. System Light Load Efficiency vs System Load Current Efficiency (%) 1 C012 91 89 90 85 87 80 85 0 1 2 3 4 Load Current (A) 0 5 500 1000 1500 VBUS Load Current (A) C011 Figure 3. Charging Efficiency vs Charging Current C013 Figure 4. Boost Mode Efficiency vs VBUS Load Current 5.04 3.80 5.02 3.75 5.00 SYS Voltage (V) VBUS Voltage (V) SYSMIN 3.5 V 4.98 4.96 4.94 3.70 3.65 3.60 VBAT = 3.2 V 4.92 3.55 VBAT = 3.8 V VBAT = 4.2 V 4.90 0 200 400 3.50 600 800 1000 VBUS Load Current (A) 1200 1400 Figure 5. Boost Mode VBUS Voltage Regulation vs VBUS Load Current 10 Submit Documentation Feedback 50 0 50 100 Temperature (C) C005 150 C001 Figure 6. SYS Voltage vs Temperature Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 2000 4.25 1800 Input Current Limit (A) BAT Voltage (V) 4.21 4.17 4.13 4.09 VREG = 4.112 V 1600 1400 1200 1000 IIN = 500 mA 800 IIN = 1.5 A 600 IIN = 2 A VREG = 4.208 V 400 4.05 -50 0 50 100 50 150 Temperature (C) 0 50 100 Temperature (C) C002 Figure 7. BAT Voltage vs Temperature 150 C003 Figure 8. Input Current Limit vs Temperature 5 4.5 Charge Current (A) 4 3.5 3 2.5 2 1.5 1 TREG 80 C TREG 120 C 0.5 0 40 50 60 70 80 90 100 110 120 Temperature (C) 130 C009 Figure 9. Charge Current vs Temperature Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 11 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9 Detailed Description 9.1 Overview The bq24190, bq24192, bq24192I is an I2C controlled power path management device and a single cell Li-Ion battery charger. It integrates the input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and BATFET (Q4) between system and battery. The device also integrates the bootstrap diode for the high-side gate drive. 9.2 Functional Block Diagram VBUS PMID Q1 V(VBUS_UVLOZ) UVLO Q1 Gate Control V(BATZ)+V(SLEEP) SLEEP REGN REGN LDO EN_HIZ ACOV V(AC0V) BTST FBO VBUS V(OTG_OVP) VINDPM VBUS_OVP_BOOST I(Q2) I(OTG_HSZCP) Q2_UCP_BOOST I(Q3) I(OTG_ILIM) Q3_OCP_BOOST IINDPM SW BAT REGN BATOVP V(BAT_REG) x V(BATOVP) IC TJ Q2 CONVERTER CONTROL BAT TREG VBAT_REG I(LSFET_UCP) UCP I(Q2) Q2_OCP I(Q3) SYS PGND I(HSFET_OCP) VSYSMIN ICHG_REG Q3 EN_HIZ EN_CHARGE EN_BOOST V(BTST-SW) REFRESH V(BTST_REFRESH) SYS ICHG VBAT_REG ICHG_REG REF DAC I(BADSRC) BAD_SRC CONVERTER CONTROL TSHUT STATE MACHINE ILIM D+ (190) D- (190) PSEL(192/192I) USB Host Adapter Detection USB Adapter 1.5A BAT OTG RECHRG INT BAT V(BATGD) STAT bq24192I PG(192/192I) I2C Interface SCL 12 Submit Documentation Feedback SDA BATSHORT bq2419x V(BAT_REG) - V(RECHG) BAT ICHG ITERM TERMINATION CHARGE CONTROL SUSPEND STATE MACHINE BATLOWV Q4 IDC IC TJ TSHUT BAT_GD bq24190/192 Q4 Gate Control BATTERY THERMISTER SENSING (bq24190/192/ 192I Hot/Cold) V(BATLOWV) BAT TS1 TS2 V(SHORT) BAT CE Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 9.3 Feature Description 9.3.1 Device Power Up 9.3.1.1 Power-On-Reset (POR) The internal bias circuits are powered from the higher voltage of VBUS and BAT. When VBUS or VBAT rises above UVLOZ, the sleep comparator, battery depletion comparator and BATFET driver are active. I2C interface is ready for communication and all the registers are reset to default value. The host can access all the registers after POR. 9.3.1.2 Power Up from Battery without DC Source If only battery is present and the voltage is above depletion threshold (VBAT_DEPL), the BATFET turns on and connects battery to system. The REGN LDO stays off to minimize the quiescent current. The low RDSON in BATFET and the low quiescent current on BAT minimize the conduction loss and maximize the battery run time. The device always monitors the discharge current through BATFET. When the system is overloaded or shorted, the device will immediately turn off BATFET and keep BATFET off until the input source plugs in again. 9.3.1.2.1 BATFET Turn Off The BATFET can be forced off by the host through I2C REG07[5]. This bit allows the user to independently turn off the BATFET when the battery condition becomes abnormal during charging. When BATFET is off, there is no path to charge or discharge the battery. When battery is not attached, the BATFET should be turned off by setting REG07[5] to 1 to disable charging and supplement mode. 9.3.1.2.2 Shipping Mode When end equipment is assembled, the system is connected to battery through BATFET. There will be a small leakage current to discharge the battery even when the system is powered off. In order to extend the battery life during shipping and storage, the device can turn off BATFET so that the system voltage is zero to minimize the leakage. In order to keep BATFET off during shipping mode, the host has to disable the watchdog timer (REG05[5:4] = 00) and disable BATFET (REG07[5] = 1) at the same time. Once the BATFET is disabled, the BATFET can be turned on by plugging in adapter. 9.3.1.3 Power Up from DC Source When the DC source plugs in, the bq24190, bq24192, bq24192I checks the input source voltage to turn on REGN LDO and all the bias circuits. It also checks the input current limit before starts the buck converter. 9.3.1.3.1 REGN LDO The REGN LDO supplies internal bias circuits as well as the HSFET and LSFET gate drive. The LDO also provides bias rail to TS1/TS2 external resistors. The pull-up rail of STAT and PG can be connected to REGN as well. The REGN is enabled when all the conditions are valid. 1. VBUS above UVLOZ 2. VBUS above battery + VSLEEPZ in buck mode or VBUS below battery + VSLEEPZ in boost mode 3. After typical 220ms delay (100ms minimum) is complete If one of the above conditions is not valid, the device is in high impedance mode (HIZ) with REGN LDO off. The device draws less than 50 A from VBUS during HIZ state. The battery powers up the system when the device is in HIZ. 9.3.1.3.2 Input Source Qualification After REGN LDO powers up, the bq24190, bq24192, bq24192I checks the current capability of the input source. The input source has to meet the following requirements to start the buck converter. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 13 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com Feature Description (continued) 1. VBUS voltage below 18 V (not in ACOV) 2. VBUS voltage above 3.8 V when pulling 30 mA (poor source detection) Once the input source passes all the conditions above, the status register REG08[2] goes high and the PG pin (bq24192, bq24192I) goes low. An INT is asserted to the host. If the device fails the poor source detection, it will repeat the detection every 2 seconds. 9.3.1.3.3 Input Current Limit Detection The USB ports on personal computers are convenient charging source for portable devices (PDs). If the portable device is attached to a USB host, the USB specification requires the portable device to draw limited current (100 mA/500 mA in USB 2.0, and 150 mA/900 mA in USB 3.0). If the portable device is attached to a charging port, it is allowed to draw up to 1.5 A. After the PG is LOW or REG08[2] goes HIGH, the charger device always runs input current limit detection when a DC source plugs in unless the charger is in HIZ during host mode. The bq24190 follows battery charging specification 1.2 (bc1.2) to detect input source through USB D+/D- lines. The bq24192 and bq24192I set input current limit through PSEL and OTG pins. After the input current limit detection is done, the host can write to REG00[2:0] to change the input current limit. 9.3.1.3.4 D+/D- Detection Sets Input Current Limit in bq24190 The bq24190 contains a D+/D- based input source detection to program the input current limit. The D+/Ddetection has two steps: data contact detect (DCD) followed by primary detection. D+ VDP_SRC VLGC_HI IDP_SRC CHG_DET VDAC_REF IDM_SINK D- RDM_DWN Figure 10. USB D+/D- Detection DCD (Data Contact Detection) uses a current source to detect when the D+/D- pins have made contact during an attach event. The protocol for data contact detect is as follows: * Detect VBUS present and REG08[2] = 1 (power good) * Turn on D+ IDP_SRC and the D- pull-down resistor RDM_DWN for 40 ms * If the USB connector is properly attached, the D+ line goes from HIGH to LOW, wait up to 0.5 sec. * Turn off IDP_SRC and disconnect RDM_DWN The primary detection is used to distinguish between USB host (Standard Down Stream Port, or SDP) and different type of charging ports (Charging Down Stream Port, or CDP, and Dedicated Charging Port, or DCP). The protocol for primary detection is as follows: * Turn on VDP_SRC on D+ and IDM_SINK on D- for 40 ms 14 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 Feature Description (continued) * * If PD is attached to a USB host (SDP), the D- is low. If PD is attached to a charging port (CDP or DCP), the D- is high Turn off VDP_SRC and IDM_SINK Table 2 shows the input current limit setting after D+/D- detection. Table 2. bq24190 USB D+/D- Detection D+/D- DETECTION OTG INPUT CURRENT LIMIT REG08[7:6] 0.5 sec timer expired in DCD (D+/D- floating) -- 100 mA 00 USB host LOW 100 mA 01 USB host HIGH 500 mA 01 Charging port -- 1.5 A 10 9.3.1.3.5 PSEL/OTG Pins Set Input Current Limit in bq24192, bq24192I The bq24192 and bq24192I has PSEL instead of D+/D-. It directly takes the USB PHY device output to decide whether the input is USB host or charging port. Table 3. bq24192, bq24192I Input Current Limit Detection PSEL OTG INPUT CURRENT LIMIT REG08[7:6] HIGH LOW 100 mA 01 HIGH HIGH 500 mA 01 -- 1.5 A (bq24192I) 3 A (bq24192) 10 LOW 9.3.1.3.6 HIZ State wth 100mA USB Host In battery charging spec, the good battery threshold is the minimum charge level of a battery to power up the portable device successfully. When the input source is 100-mA USB host, and the battery is above bat-good threshold (VBATGD), the device follows battery charging spec and enters high impedance state (HIZ). In HIZ state, the device is in the lowest quiescent state with REGN LDO and the bias circuits off. The charger device sets REG00[7] to 1, and the VBUS current during HIZ state will be less than 30 A. The system is supplied by the battery. Once the charger device enters HIZ state in host mode, it stays in HIZ until the host writes REG00[7] = 0. When the processor host wakes up, it is recommended to first check if the charger is in HIZ state. In default mode, the charger IC will reset REG00[7] back to 0 when input source is removed. When another source plugs in, the charger IC will run detection again, and update the input current limit. 9.3.1.3.7 Force Input Current Limit Detection The host can force the charger device to run input current limit detection by setting REG07[7] = 1. After the detection is complete, REG07[7] will return to 0 by itself. 9.3.1.4 Converter Power-Up After the input current limit is set, the converter is enabled and the HSFET and LSFET start switching. If battery charging is disabled, BATFET turns off. Otherwise, BATFET stays on to charge the battery. The bq24190, bq24192, bq24192I provides soft-start when ramp up the system rail. When the system rail is below 2.2 V, the input current limit is forced to 100 mA. After the system rises above 2.2 V, the charger device sets the input current limit set by the lower value between register and ILIM pin. As a battery charger, the bq24190, bq24192, bq24192I deploys a 1.5-MHz step-down switching regulator. The fixed frequency oscillator keeps tight control of the switching frequency under all conditions of input voltage, battery voltage, charge current and temperature, simplifying output filter design. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 15 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com A type III compensation network allows using ceramic capacitors at the output of the converter. An internal sawtooth ramp is compared to the internal error control signal to vary the duty cycle of the converter. The ramp height is proportional to the PMID voltage to cancel out any loop gain variation due to a change in input voltage. In order to improve light-load efficiency, the device switches to PFM control at light load when battery is below minimum system voltage setting or charging is disabled. During the PFM operation, the switching duty cycle is set by the ratio of SYS and VBUS. 9.3.1.5 Boost Mode Operation from Battery The bq24190, bq24192, bq24192I supports boost converter operation to deliver power from the battery to other portable devices through USB port. The boost mode output current rating meets the USB On-The-Go 500-mA output requirement. The maximum output current is 1.3 A. The boost operation can be enabled if the following conditions are valid: 1. BAT above BATLOWV threshold (VBATLOWV set by REG04[1]) 2. VBUS less than BAT+VSLEEP (in sleep mode) 3. Boost mode operation is enabled (OTG pin HIGH and REG01[5:4] = 10) 4. After 220-ms delay from boost mode enable In boost mode, the bq24190, bq24192, bq24192I employs a 1.5-MHz step-up switching regulator. Similar to buck operation, the device switches from PWM operation to PFM operation at light load to improve efficiency. During boost mode, the status register REG08[7:6] is set to 11, the VBUS output is 5 V and the output current can reach up to 500 mA or 1.3 A, selected via I2C (REG01[0]). Any fault during boost operation, including VBUS over-voltage or over-current, sets the fault register REG09[6] to 1 and an INT is asserted. 9.3.2 Power Path Management The bq24190, bq24192, bq24192I accommodates a wide range of input sources from USB, wall adapter, to car battery. The device provides automatic power path selection to supply the system (SYS) from input source (VBUS), battery (BAT), or both. 9.3.2.1 Narrow VDC Architecture The device deploys Narrow VDC architecture (NVDC) with BATFET separating system from battery. The minimum system voltage is set by REG01[3:1]. Even with a fully depleted battery, the system is regulated above the minimum system voltage (default 3.5 V). When the battery is below minimum system voltage setting, the BATFET operates in linear mode (LDO mode), and the system is 150 mV above the minimum system voltage setting. As the battery voltage rises above the minimum system voltage, BATFET is fully on and the voltage difference between the system and battery is the VDS of BATFET. When the battery charging is disabled or terminated, the system is always regulated at 150 mV above the minimum system voltage setting. The status register REG08[0] goes high when the system is in minimum system voltage regulation. 16 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 4.5 4.3 Charge Enabled 4.1 SYS (V) Charge Disabled 3.9 3.7 3.5 Minimum System Voltage 3.3 3.1 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 BAT (V) Figure 11. V(SYS) vs V(BAT) 9.3.2.2 Dynamic Power Management To meet maximum current limit in USB spec and avoid over loading the adapter, the bq24190, bq24192, bq24192I features Dynamic Power Management (DPM), which continuously monitors the input current and input voltage. When input source is over-loaded, either the current exceeds the input current limit (REG00[2:0]) or the voltage falls below the input voltage limit (REG00[6:3]). The device then reduces the charge current until the input current falls below the input current limit and the input voltage rises above the input voltage limit. When the charge current is reduced to zero, but the input source is still overloaded, the system voltage starts to drop. Once the system voltage falls below the battery voltage, the device automatically enters the supplement mode where the BATFET turns on and battery starts discharging so that the system is supported from both the input source and battery. During DPM mode (either VINDPM or IINDPM), the status register REG08[3] will go high. Figure 12 shows the DPM response with 9-V/1.2-A adapter, 3.2-V battery, 2.8-A charge current and 3.4-V minimum system voltage setting. Voltage VBUS 9V SYS 3.6V 3.4V 3.2V 3.18V BAT Current 4A ICHG 3.2A 2.8A ISYS 1.2A 1.0A 0.5A IIN -0.6A DPM DPM Supplement Figure 12. DPM Response Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 17 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.3.2.3 Supplement Mode When the system voltage falls below the battery voltage, the BATFET turns on and the BATFET gate is regulated the gate drive of BATFET so that the minimum BATFET VDS stays at 30 mV when the current is low. This prevents oscillation from entering and exiting the supplement mode. As the discharge current increases, the BATFET gate is regulated with a higher voltage to reduce RDSON until the BATFET is in full conduction. At this point onwards, the BATFET VDS linearly increases with discharge current. Figure 13 shows the V-I curve of the BATFET gate regulation operation. BATFET turns off to exit supplement mode when the battery is below battery depletion threshold. 4.5 4.0 CURRENT (A) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 5 10 15 20 25 30 35 40 45 50 55 V(BAT-SYS) (mV) Figure 13. BATFET V-I Curve 9.3.3 Battery Charging Management The bq24190, bq24192, bq24192I charges 1-cell Li-Ion battery with up to 4.5A charge current for high capacity tablet battery. The 12-m BATFET improves charging efficiency and minimizes the voltage drop during discharging. 9.3.3.1 Autonomous Charging Cycle With battery charging enabled at POR (REG01[5:4] = 01), the bq24190, bq24192, bq24192I can complete a charging cycle without host involvement. The device default charging parameters are listed in Table 4. Table 4. Charging Parameter Default Setting (1) A * * * * * DEFAULT MODE bq24190, bq24192 bq24192I Charging voltage 4.208 V 4.112 V Charging Current 2.048 A 1.024 A Pre-charge current 256 mA 256 mA Termination current 256 mA 256 mA Temperature profile Hot/Cold Hot/Cold Safety timer 8 hours (1) 8 hours (1) See section Charging Safety Timer for more information. new charge cycle starts when the following conditions are valid: Converter starts Battery charging is enabled by I2C register bit (REG01[5:4]) = 01 and CE is low No thermistor fault on TS1 and TS2 No safety timer fault BATFET is not forced to turn off (REG07[5]) The charger device automatically terminates the charging cycle when the charging current is below termination threshold and charge voltage is above recharge threshold. When a full battery voltage is discharged below recharge threshold (REG04[0]), the bq24190, bq24192, bq24192I automatically starts another charging cycle. 18 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 The STAT output indicates the charging status of charging (LOW), charging complete or charge disable (HIGH) or charging fault (Blinking). The status register REG08[5:4] indicates the different charging phases: 00-charging disable, 01-precharge, 10-fast charge (constant current) and constant voltage mode, 11-charging done. Once a charging cycle is complete, an INT is asserted to notify the host. The host can always control the charging operation and optimize the charging parameters by writing to the registers through I2C. 9.3.3.2 Battery Charging Profile The device charges the battery in three phases: preconditioning, constant current and constant voltage. At the beginning of a charging cycle, the device checks the battery voltage and applies current. Table 5. Charging Current Setting VBAT CHARGING CURRENT REG DEFAULT SETTING REG08[5:4] <2V 100 mA - 01 2V-3V REG03[7:4] 256 mA 01 >3V REG02[7:2] 2048 mA (bq24190/192) 1024 mA (bq24192I) 10 If the charger device is in DPM regulation or thermal regulation during charging, the actual charging current will be less than the programmed value. In this case, termination is temporarily disabled and the charging safety timer is counted at half the clock rate. Regulation Voltage (3.5V - 4.4V) Battery Voltage Fast Charge Current (500mA-4020mA) Charge Current VBAT_LOWV (2.8V/3V) VBAT_SHORT (2V) IPRECHARGE (128mA-2048mA) ITERMINATION (128mA-2048mA) IBATSHORT (100mA) Trickle Charge Pre-charge Fast Charge and Voltage Regulation Safety Timer Expiration Figure 14. Battery Charging Profile 9.3.3.3 Battery Path Impedance IR Compensation To speed up the charging cycle, we would like to stay in constant current mode as long as possible. In real system, the parasitic resistance, including routing, connector, MOSFETs and sense resistor in the battery pack, may force the charger device to move from constant current loop to constant voltage loop too early, extending the charge time. The bq24190, bq24192, bq24192I allows the user to compensate for the parasitic resistance by increasing the voltage regulation set point according to the actual charge current and the resistance. For safe operation, the user should set the maximum allowed regulation voltage to REG06[4:2], and the minimum trace parasitic resistance (REG06[7:5]). ( ) VBATREG_ACTUAL = VBATREG_I2C + lower of ICHRG_ACTUAL x RCOMP and VCLAMP Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback (1) 19 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.3.3.4 Thermistor Qualification The high capacity battery usually has two or more single cells in parallel. The bq24190, bq24192, bq24192I provides two TS pins to monitor the thermistor (NTC) in each cell independently. 9.3.3.4.1 Cold/Hot Temperature Window The bq24190, bq24192, bq24192I continuously monitors battery temperature by measuring the voltage between the TS pins and ground, typically determined by a negative temperature coefficient thermistor and an external voltage divider. The device compares this voltage against its internal thresholds to determine if charging is allowed. To initiate a charge cycle, the battery temperature must be within the VLTF to VHTF thresholds. During the charge cycle the battery temperature must be within the VLTF to VTCO thresholds, else the device suspends charging and waits until the battery temperature is within the VLTF to VHTF range. REGN bq2419x RT1 TS RT2 RTH 103AT Figure 15. TS Resistor Network When the TS fault occurs, the fault register REG09[2:0] indicates the actual condition on each TS pin and an INT is asserted to the host. The STAT pin indicates the fault when charging is suspended. TEMPERATURE RANGE TO INITIATE CHARGE TEMPERATURE RANGE DURING A CHARGE CYCLE VREF VREF CHARGE SUSPENDED CHARGE SUSPENDED VLTF VLTF VLTFH VLTFH CHARGE at full C CHARGE at full C VHTF VTCO CHARGE SUSPENDED CHARGE SUSPENDED AGND AGND Figure 16. TS Pin Thermistor Sense Thresholds Assuming a 103AT NTC thermistor is used on the battery pack, the value RT1 and RT2 can be determined by using the following equations: 20 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 ae 1 1 o VVREF RTHCOLD RTHHOT c / e VLTF VTCO o RT2 = aeV o aeV o RTHHOT c VREF - 1/ - RTHCOLD c VREF - 1/ e VLTF o e VTCO o VVREF -1 VLTF RT1 = 1 1 + RT2 RTHCOLD (2) Select 0C to 45C range for Li-ion or Li-polymer battery, RTHCOLD = 27.28 k RTHHOT = 4.911 k RT1 = 5.52 k RT2 = 31.23 k 9.3.3.5 Charging Termination The bq24190, bq24192, bq24192I terminates a charge cycle when the battery voltage is above recharge threshold, and the current is below termination current. After the charging cycle is complete, the BATFET turns off. The converter keeps running to power the system, and BATFET can turn back on to engage supplement mode. When termination occurs, the status register REG08[5:4] is 11, and an INT is asserted to the host. Termination is temporarily disabled if the charger device is in input current/voltage regulation or thermal regulation. Termination can be disabled by writing 0 to REG05[7]. 9.3.3.5.1 Termination when REG02[0] = 1 When REG02[0] is HIGH to reduce the charging current by 80%, the charging current could be less than the termination current. The charger device termination function should be disabled. When the battery is charged to fully capacity, the host disables charging through CE pin or REG01[5:4]. 9.3.3.5.2 Termination when REG05[6] = 1 Usually the STAT bit indicates charging complete when the charging current falls below termination threshold. Write REG05[6] = 1 to enable an early "charge done" indication on STAT pin. The STAT pin goes high when the charge current reduces below 800 mA. The charging cycle is still on-going until the current falls below the termination threshold. 9.3.3.6 Charging Safety Timer The bq24190, bq24192, bq24192I has safety timer to prevent extended charging cycle due to abnormal battery conditions. In default mode, the device keeps charging the battery with 5-hour fast charging safety timer regardless of REG05[2:1] default value. At the end of the 5 hours, the EN_HIZ (REG00[7]) is set to signal the buck converter stops and the system load is supplied by the battery. The EN_HIZ bit can be cleared to restart the buck converter. In host mode, the device keeps charging the battery until the fast charging safety timer expired. The duration of safety timer can be set by the REG05[2:1] bits (default = 8 hours). At the end of safety timer, the EN_HIZ (REG00[7]) is cleared to signal the buck converter continues to operation to supply system load. The safety timer is 1 hour when the battery is below BATLOWV threshold. The user can program fast charge safety timer through I2C (REG05[2:1]). When safety timer expires, the fault register REG09[5:4] goes 11 and an INT is asserted to the host. The safety timer feature can be disabled via I2C (REG05[3]). The following actions restart the safety timer: * At the beginning of a new charging cycle Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 21 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 * * * www.ti.com Toggle the CE pin HIGH to LOW to HIGH (charge enable) Write REG01[5:4] from 00 to 01 (charge enable) Write REG05[3] from 0 to 1 (safety timer enable) During input voltage/current regulation or thermal regulation, or when FORCE_20PCT (REG02[0]) bit is set, the safety timer counts at half clock rate since the actual charge current is likely to be below the register setting. For example, if the charger is in input current regulation (IINDPM) throughout the whole charging cycle, and the safety time is set to 5 hours, the safety timer will expire in 10 hours. This feature can be disabled by writing 0 to REG07[6]. It is recommended to disable safety timer first by clearing REG05[3] bit before safety timer configuration is changed. The safety timer should be re-enabled by setting REG05[3] bit. 9.3.3.7 USB Timer when Charging from USB100mA Source The total charging time in default mode from USB100-mA source is limited by a 45-min max timer. At the end of the timer, the device stops the converter and goes to HIZ. 9.3.4 Status Outputs (PG, STAT, and INT) 9.3.4.1 Power Good Indicator (PG) In bq24192, bq24192I, PG goes LOW to indicate a good input source when: 1. VBUS above UVLO 2. VBUS above battery (not in sleep) 3. VBUS below ACOV threshold 4. VBUS above 3.8 V when 30-mA current is applied (not a poor source) 9.3.4.2 Charging Status Indicator (STAT) The bq24190, bq24192, bq24192I indicates charging state on the open drain STAT pin. The STAT pin can drive LED as the application diagram shows. Table 6. STAT Pin State CHARGING STATE STAT Charging in progress (including recharge) LOW Charging complete HIGH Sleep mode, charge disable HIGH Charge suspend (Input over-voltage, TS fault, timer fault, input or system overvoltage) blinking at 1Hz (bq24190, bq24192) or 10-k pull down (bq24192I) When a fault occurs, instead of blinking, the STAT pin in bq24192I has a 10-k pull-down resistor to ground. When the pull-up resistor is 30 k, the STAT voltage during fault is 1/4 of the pull-up rail. 9.3.4.3 Interrupt to Host (INT) In some applications, the host does not always monitor the charger operation. The INT notifies the system on the device operation. The following events will generate 256-us INT pulse. * USB/adapter source identified (through PSEL or DPDM detection, with OTG pin) * Good input source detected - VVBUS - VBAT > VSLEEPZ - VVBUS > VACOV - current limit above IBADSRC * Input removed * Charge Complete * Any FAULT event in REG09 22 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 When a fault occurs, the charger device sends out INT and keeps the fault state in REG09 until the host reads the fault register. Before the host reads REG09 and all the faults are cleared, the charger device would not send any INT upon new faults. In order to read the current fault status, the host has to read REG09 two times consecutively. The 1st reads fault register status from the last read and the 2nd reads the current fault register status. 9.3.5 Protections 9.3.5.1 Input Current Limit on ILIM For safe operation, the bq24190, bq24192, bq24192I has an additional hardware pin on ILIM to limit maximum input current on ILIM pin. The input maximum current is set by a resistor from ILIM pin to ground as: 1V IINMAX = 530 RILIM (3) The actual input current limit is the lower value between ILIM setting and register setting (REG00[2:0]). For example, if the register setting is 111 for 3 A, and ILIM has a 353- resistor to ground for 1.5 A, the input current limit is 1.5 A. ILIM pin can be used to set the input current limit rather than the register settings. The device regulates ILIM pin at 1 V. If ILIM voltage exceeds 1 V, the device enters input current regulation (Refer to Dynamic Power Path Management section). The voltage on the ILIM pin is proportional to the input current. The ILIM pin can be used to monitor the input current per Equation 4: V IIN = ILIM IINMAX (4) 1V For example, if the ILIM pin sets 2 A, and the ILIM voltage is 0.6 V, the actual input current is 1.2 A. If the ILIM pin is open, the input current is limited to zero since ILIM voltage floats above 1 V. If the ILIM pin is short, the input current limit is set by the register. 9.3.5.2 Thermal Regulation and Thermal Shutdown The bq24190, bq24192, bq24192I monitors the internal junction temperature TJ to avoid overheat the chip and limits the IC surface temperature. When the internal junction temperature exceeds the preset limit (REG06[1:0]), the device lowers down the charge current. The wide thermal regulation range from 60C to 120C allows the user to optimize the system thermal performance. During thermal regulation, the actual charging current is usually below the programmed battery charging current. Therefore, termination is disabled, the safety timer runs at half the clock rate, and the status register REG08[1] goes high. Additionally, the device has thermal shutdown to turn off the converter. The fault register REG09[5:4] is 10 and an INT is asserted to the host. 9.3.5.3 Voltage and Current Monitoring in Buck Mode The bq24190, bq24192, bq24192I closely monitor the input and system voltage, as well as HSFET and LSFET current for safe buck mode operation. 9.3.5.3.1 Input Over-Voltage (ACOV) The maximum input voltage for buck mode operation is 18 V. If VBUS voltage exceeds 18 V, the device stops switching immediately. During input over voltage (ACOV), the fault register REG09[5:4] will be set to 01. An INT is asserted to the host. 9.3.5.3.2 System Over-Voltage Protection (SYSOVP) The charger device monitors the voltage at SYS. When system over-voltage is detected, the converter is stopped to protect components connected to SYS from high voltage damage. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 23 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.3.5.4 Voltage and Current Monitoring in Boost Mode The bq24190, bq24192, bq24192I closely monitors the VBUS voltage, as well as HSFET and LSFET current to ensure safe boost mode operation. 9.3.5.4.1 VBUS Over-Voltage Protection The boost mode regulated output is 5 V. When an adapter plugs in during boost mode, the VBUS voltage will rise above regulation target. Once the VBUS voltage exceeds 5.3 V, the bq24190, bq24192, bq24192I stops switching and the device exits boost mode. The fault register REG09[6] is set high to indicate fault in boost operation. An INT is asserted to the host. 9.3.5.5 Battery Protection 9.3.5.5.1 Battery Over-Current Protection (BATOVP) The battery over-voltage limit is clamped at 4% above the battery regulation voltage. When battery over voltage occurs, the charger device immediately disables charge. The fault register REG09[5] goes high and an INT is asserted to the host. 9.3.5.5.2 Charging During Battery Short Protection If the battery voltage falls below 2 V, the charge current is reduced to 100 mA for battery safety. 9.3.5.5.3 System Over-Current Protection If the system is shorted or exceeds the over-current limit, the BATFET is latched off. DC source insertion on VBUS is required to reset the latch-off condition and turn on BATFET. 9.3.6 Serial Interface The bq24190, bq24192, bq24192I uses I2C compatible interface for flexible charging parameter programming and instantaneous device status reporting. I2C is a bi-directional 2-wire serial interface developed by Philips Semiconductor (now NXP Semiconductors). Only two bus lines are required: a serial data line (SDA) and a serial clock line (SCL). Devices can be considered as masters or slaves when performing data transfers. A master is the device which initiates a data transfer on the bus and generates the clock signals to permit that transfer. At that time, any device addressed is considered a slave. The device operates as a slave device with address 6BH, receiving control inputs from the master device like micro controller or a digital signal processor. The I2C interface supports both standard mode (up to 100 kbits), and fast mode (up to 400 kbits). Both SDA and SCL are bi-directional lines, connecting to the positive supply voltage via a current source or pullup resistor. When the bus is free, both lines are HIGH. The SDA and SCL pins are open drain. 9.3.6.1 Data Validity The data on the SDA line must be stable during the HIGH period of the clock. The HIGH or LOW state of the data line can only change when the clock signal on the SCL line is LOW. One clock pulse is generated for each data bit transferred. 24 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 SDA SCL Change of data allowed Data line stable; Data valid Figure 17. Bit Transfer on the I2C Bus 9.3.6.2 START and STOP Conditions All transactions begin with a START (S) and can be terminated by a STOP (P). A HIGH to LOW transition on the SDA line while SCl is HIGH defines a START condition. A LOW to HIGH transition on the SDA line when the SCL is HIGH defines a STOP condition. START and STOP conditions are always generated by the master. The bus is considered busy after the START condition, and free after the STOP condition. SDA SDA SCL SCL STOP (P) START (S) Figure 18. START and STOP conditions 9.3.6.3 Byte Format Every byte on the SDA line must be 8 bits long. The number of bytes to be transmitted per transfer is unrestricted. Each byte has to be followed by an Acknowledge bit. Data is transferred with the Most Significant Bit (MSB) first. If a slave cannot receive or transmit another complete byte of data until it has performed some other function, it can hold the clock line SCL low to force the master into a wait state (clock stretching). Data transfer then continues when the slave is ready for another byte of data and release the clock line SCL. Acknowledgement signal from receiver Acknowledgement signal from slave MSB SDA SCL S or Sr 1 2 7 START or Repeated START 8 9 ACK 1 2 8 9 ACK P or Sr STOP or Repeated START Figure 19. Data Transfer on the I2C Bus Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 25 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.3.6.4 Acknowledge (ACK) and Not Acknowledge (NACK) The acknowledge takes place after every byte. The acknowledge bit allows the receiver to signal the transmitter that the byte was successfully received and another byte may be sent. All clock pulses, including the acknowledge 9th clock pulse, are generated by the master. The transmitter releases the SDA line during the acknowledge clock pulse so the receiver can pull the SDA line LOW and it remains stable LOW during the HIGH period of this clock pulse. When SDA remains HIGH during the 9th clock pulse, this is the Not Acknowledge signal. The master can then generate either a STOP to abort the transfer or a repeated START to start a new transfer. 9.3.6.5 Slave Address and Data Direction Bit After the START, a slave address is sent. This address is 7 bits long followed by the eighth bit as a data direction bit (bit R/W). A zero indicates a transmission (WRITE) and a one indicates a request for data (READ). SDA SCL S 1-7 8 9 START ADDRESS R/W ACK 8 1-7 9 8 1-7 ACK DATA DATA 9 P ACK STOP Figure 20. Complete Data Transfer 9.3.6.5.1 Single Read and Write 1 7 S Slave Address 1 0 8 1 8 1 1 Reg Addr ACK Data Addr ACK P 1 ACK Figure 21. Single Write 1 7 1 1 8 1 1 7 1 1 S Slave Address 0 ACK Reg Addr ACK S Slave Address 1 ACK 8 1 1 Data NCK P Figure 22. Single Read If the register address is not defined, the charger IC send back NACK and go back to the idle state. 9.3.6.5.2 Multi-Read and Multi-Write The charger device supports multi-read and multi-write on REG00 through REG08. 1 7 1 1 8 1 S Slave Address 0 ACK Reg Addr ACK 8 1 8 1 8 1 1 Slave Address ACK Data to Addr+1 ACK Data to Addr+1 ACK P Figure 23. Multi-Write 26 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 1 7 1 1 8 1 1 7 1 1 S Slave Address 0 ACK Reg Addr ACK S Slave Address 1 ACK 8 Data @ Addr 1 8 1 8 1 1 ACK Data @ Addr+1 ACK Data @ Addr+1 ACK P Figure 24. Multi-Read The fault register REG09 locks the previous fault and only clears it after the register is read. For example, if Charge Safety Timer Expiration fault occurs but recovers later, the fault register REG09 reports the fault when it is read the first time, but returns to normal when it is read the second time. To verify real time fault, the fault register REG09 should be read twice to get the real condition. In addition, the fault register REG09 does not support multi-read or multi-write. 9.4 Device Functional Modes 9.4.1 Host Mode and Default Mode The bq24190, bq24192, bq24192I is a host controlled device, but it can operate in default mode without host management. In default mode, bq24190, bq24192, bq24192I can be used as an autonomous charger with no host or with host in sleep. When the charger is in default mode, REG09[7] is HIGH. When the charger is in host mode, REG09[7] is LOW. After power-on-reset, the device starts in watchdog timer expiration state, or default mode. All the registers are in the default settings. Any write command to bq24190, bq24192, bq24192I transitions the device from default mode to host mode. All the device parameters can be programmed by the host. To keep the device in host mode, the host has to reset the watchdog timer by writing 1 twice to REG01[6] before the watchdog timer expires (REG05[5:4]), or disable watchdog timer by setting REG05[5:4] = 00. POR watchdog timer expired Reset registers I2C interface enabled Host Mode Y I2C Write? Start watchdog timer Host programs registers N Default Mode Reset watchdog timer Reset registers N Reset REG01 bit[6]? Y Y N I2C Write? Y Watchdog Timer Expired? N Figure 25. Watchdog Timer Flow Chart 9.4.1.1 Plug in USB100mA Source with Good Battery When the input source is detected as 100-mA USB host, and the battery voltage is above batgood threshold (VBATGD), the charger device enters HIZ state to meet the battery charging spec requirement. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 27 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com Device Functional Modes (continued) If the charger device is in host mode, it will stay in HIZ state even after the USB100-mA source is removed, and the adapter plugs in. During the HIZ state, REG00[7] is set HIGH and the system load is supplied from battery. It is recommended that the processor host always checks if the charger IC is in HIZ state when it wakes up. The host can write REG00[7] to 0 to exit HIZ state. If the charger is in default mode, when the DC source is removed, the charger device will get out of HIZ state automatically. When the input source plugs in again, the charger IC runs detection on the input source and update the input current limit. 9.4.1.2 USB Timer when Charging from USB 100-mA Source The total charging time in default mode from USB 100-mA source is limited by a 45-min max timer. At the end of the timer, the device stops the converter and goes to HIZ. 9.5 Register Map Table 7. Register Map REGISTER 28 REGISTER NAME RESET REG00 Input Source Control Register bq24190, bq24192: 00110000, or 30 bq24192I: 00111000, or 38 REG01 Power-On Configuration Register 00011011, or 1B REG02 Charge Current Control Register bq24190, bq24192: 01100000, or 60 bq24192I: 00100000, or 20 REG03 Pre-Charge/Termination Current Control Register 00010001, or 11 REG04 Charge Voltage Control Register bq24190, bq241192: 10110010, or B2 bq24192I: 10011010, or 9A REG05 Charge Termination/Timer Control Register 10011010, or 9A REG06 IR Compensation / Thermal Regulation Control Register 00000011, or 03 REG07 Misc Operation Control Register 01001011, or 4B REG08 System Status Register -- REG09 Fault Register -- REG0A Vender / Part / Revision Status Register -- Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 9.5.1 I2C Registers Address: 6BH. REG00-07 support Read and Write. REG08-0A are read only. 9.5.1.1 Input Source Control Register REG00 (bq24190, bq24192 reset = 00110000, or 30; bq24192I reset = 00111000, or 38) Figure 26. REG00 Input Source Control Register Format 7 EN_HIZ R/W 6 VINDPM[3] R/W 5 VINDPM[2] R/W 4 VINDPM[1] R/W 3 VINDPM[0] R/W 2 IINLIM[2] R/W 1 IINLIM[1] R/W 0 IINLIM[0] R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 8. REG00 Input Source Control Register Description BIT FIELD TYPE RESET DESCRIPTION Bit 7 EN_HIZ R/W 0 0 - Disable, 1 - Enable Default: Disable (0) Offset 3.88 V, Range: 3.88 V to 5.08 V Default: bq24190/bq24192: 4.36 V (0110) bq24192i: 4.44 V (0111) Input Voltage Limit Bit 6 VINDPM[3] R/W 0 640 mV Bit 5 VINDPM[2] R/W 1 320 mV Bit 4 VINDPM[1] R/W 1 160 mV Bit 3 VINDPM[0] R/W 0: (bq24190/92) 1: (bq24192I) 80 mV Input Current Limit (Actual input current limit is the lower of I2C and ILIM) Bit 2 IINLIM[2] R/W 0 Bit 1 IINLIM[1] R/W 0 Bit 0 IINLIM[0] R/W 0 000 - 100 mA, 001 - 150 mA, 010 - 500 mA, 011 - 900 mA, 100 - 1.2 A, 101 - 1.5 A, 110 - 2 A, 111 - 3 A Default SDP: 100 mA (000)(OTG pin = 0) or 500 mA (010) (OTG pin = 1) Default DCP/CDP: bq24190/bq24192I: 1.5 A (101), bq24192: 3 A (111) Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 29 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.5.1.2 Power-On Configuration Register REG01 (reset = 00011011, or 1B) Figure 27. REG01 Power-On Configuration Register Format 7 6 Register Reset I2C Watchdog Timer Reset R/W R/W 5 CHG_CONFIG[1] 4 CHG_CONFIG[0] 3 SYS_MIN[2] 2 SYS_MIN[1] 1 SYS_MIN[0] 0 BOOST_LIM R/W R/W R/W R/W R/W R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 9. REG01 Power-On Configuration Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE Bit 7 Register Reset R/W 0 0 - Keep current register setting, 1 - Reset to default Default: Keep current register setting (0) Back to 0 after register reset Bit 6 I2C Watchdog Timer Reset R/W 0 0 - Normal ; 1 - Reset Default: Normal (0) Back to 0 after timer reset Charger Configuration Bit 5 CHG_CONFIG[1] R/W 0 CHG_CONFIG[0] R/W 1 00 - Charge Disable, 01 - Charge Battery, 10/11 - OTG Default: Charge Battery (01) Bit 4 Offset: 3.0 V, Range 3.0 V to 3.7 V Default: 3.5 V (101) Minimum System Voltage Limit Bit 3 SYS_MIN[2] R/W 1 0.4 V Bit 2 SYS_MIN[1] R/W 0 0.2 V Bit 1 SYS_MIN[0] R/W 1 0.1 V R/W 1 0 - 500 mA, 1 - 1.3 A Boost Mode Current Limit Bit 0 30 BOOST_LIM Submit Documentation Feedback Default: 1.3 A (1) Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 9.5.1.3 Charge Current Control Register REG02 (bq24190, bq24192 reset = 01100000, or 60; bq24192I reset = 00100000, or 20) Figure 28. REG02 Charge Current Control Register Format 7 ICHG[5] R/W 6 ICHG[4] R/W 5 ICHG[3] R/W 4 ICHG[2] R/W 3 ICHG[1] R/W 2 ICHG[0] R/W 1 Reserved R/W 0 FORCE_20PCT R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 10. REG02 Charge Current Control Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE Offset: 512 mA Range: 512 to 4544 mA Default: bq24190, bq24192: 2048 mA (011000), bq24192I: 1024 mA (001000) Fast Charge Current Limit Bit 7 ICHG[5] R/W 0 2048 mA Bit 6 ICHG[4] R/W 0: (bq24192I) 1: (bq24190/92) 1024 mA Bit 5 ICHG[3] R/W 1 512 mA Bit 4 ICHG[2] R/W 0 256 mA Bit 3 ICHG[1] R/W 0 128 mA Bit 2 ICHG[0] R/W 0 64 mA Bit 1 Reserved R/W 0 0 - Reserved Bit 0 FORCE_20PCT R/W 0 0 - ICHG as REG02[7:2] (Fast Charge Default: ICHG as REG02[7:2] (Fast Charge Current Limit) and REG03[7:4] (PreCurrent Limit) and REG03[7:4] (Pre-Charge Charge Current Limit) programmed Current Limit) programmed (0) 1 - ICHG as 20% of REG02[7:2] (Fast Charge Current Limit) and 50% of REG03[7:4] (Pre-Charge Current Limit) programmed Reserved. Must write "0" 9.5.1.4 Pre-Charge/Termination Current Control Register REG03 (reset = 00010001, or 11) Figure 29. REG03 Pre-Charge/Termination Current Control Register Format 7 IPRECHG[3] R/W 6 IPRECHG[2] R/W 5 IPRECHG[1] R/W 4 IPRECHG[0] R/W 3 ITERM[3] R/W 2 ITERM[2] R/W 1 ITERM[1] R/W 0 ITERM[0] R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 11. REG03 Pre-Charge/Termination Current Control Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE Offset: 128 mA, Range: bq24190, bq24192: 128 mA to 2048 mA bq24192I: 128 mA to 640 mA(0100) Default: 256 mA (0001) Pre-Charge Current Limit Bit 7 IPRECHG[3] R/W 0 1024 mA Bit 6 IPRECHG[2] R/W 0 512 mA Bit 5 IPRECHG[1] R/W 0 256 mA Bit 4 IPRECHG[0] R/W 1 128 mA Termination Current Limit Bit 3 ITERM[3] R/W 0 1024 mA Bit 2 ITERM[2] R/W 0 512 mA Bit 1 ITERM[1] R/W 0 256 mA Bit 0 ITERM[0] R/W 1 128 mA Offset: 128 mA Range: 128 mA to 2048 mA Default: 256 mA (0001) Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 31 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.5.1.5 Charge Voltage Control Register REG04 (bq24190, bq241192 reset = 10110010, or B2; bq24192I reset = 10011010, or 9A) Figure 30. REG04 Charge Voltage Control Register Format 7 VREG[5] R/W 6 VREG[4] R/W 5 VREG[3] R/W 4 VREG[2] R/W 3 VREG[1] R/W 2 VREG[0] R/W 1 BATLOWV R/W 0 VRECHG R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 12. REG04 Charge Voltage Control Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE Offset: 3.504 V Range: 3.504 V to 4.400 V (111000) Default: bq24190, bq24192: 4.208 V (101100) bq24192I: 4.112 V (100110) Charge Voltage Limit Bit 7 VREG[5] R/W 1 512 mV Bit 6 VREG[4] R/W 0 256 mV Bit 5 VREG[3] R/W 0: (bq24192I) 1: (bq24190/92) 128 mV Bit 4 VREG[2] R/W 1 64 mV Bit 3 VREG[1] R/W 0: (bq24190/92) 1: (bq24192I) 32 mV Bit 2 VREG[0] R/W 0 16 mV Battery Precharge to Fast Charge Threshold Bit 1 BATLOWV R/W 1 0 - 2.8 V, 1 - 3.0 V Default: 3.0 V (1) Battery Recharge Threshold (below battery regulation voltage) Bit 0 VRECHG R/W 0 0 - 100 mV, 1 - 300 mV Default: 100 mV (0) 9.5.1.6 Charge Termination/Timer Control Register REG05 (reset = 10011010, or 9A) Figure 31. REG05 Charge Termination/Timer Control Register Format 7 EN_TERM R/W 6 TERM_STAT R/W 5 4 WATCHDOG[1] WATCHDOG[0] R/W R/W 3 EN_TIMER R/W 2 1 CHG_TIMER[1] CHG_TIMER[0] R/W R/W 0 Reserved R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 13. REG05 Charge Termination/Timer Control Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE R/W 1 0 - Disable, 1 - Enable Default: Enable termination (1) R/W 0 0 - Match ITERM, 1 - STAT pin high before actual termination when charge current below 800 mA Default Match ITERM (0) 00 - Disable timer, 01 - 40 s, 10 - 80 s, 11 - 160 s Default: 40 s (01) Charging Termination Enable Bit 7 EN_TERM Termination Indicator Threshold Bit 6 TERM_STAT I2C Watchdog Timer Setting Bit 5 WATCHDOG[1] R/W 0 Bit 4 WATCHDOG[0] R/W 1 Charging Safety Timer Enable Bit 3 EN_TIMER R/W 1 0 - Disable, 1 - Enable Default: Enable (1) 00 - 5 hrs, 01 - 8 hrs, 10 - 12 hrs, 11 - 20 hrs Default: 8 hours (01) (See Charging Safety Timer for details) 0 - Reserved Reserved. Must write "0" Fast Charge Timer Setting Bit 2 CHG_TIMER[1] R/W 0 Bit 1 CHG_TIMER[0] R/W 1 Bit 0 Reserved R/W 0 32 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 9.5.1.7 IR Compensation / Thermal Regulation Control Register REG06 (reset = 00000011, or 03) Figure 32. REG06 IR Compensation / Thermal Regulation Control Register Format 7 BAT_COMP[2] R/W 6 BAT_COMP[1] R/W 5 BAT_COMP[0] R/W 4 VCLAMP[2] R/W 3 VCLAMP[1] R/W 2 VCLAMP[0] R/W 1 TREG[1] R/W 0 TREG[0] R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 14. REG06 IR Compensation / Thermal Regulation Control Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE Range: 0 to 70 m Default: 0 (000) IR Compensation Resistor Setting Bit 7 BAT_COMP[2] R/W 0 40 m Bit 6 BAT_COMP[1] R/W 0 20 m Bit 5 BAT_COMP[0] R/W 0 10 m IR Compensation Voltage Clamp (above regulation voltage) Bit 4 VCLAMP[2] R/W 0 64 mV Bit 3 VCLAMP[1] R/W 0 32 mV Range: 0 to 112 mV Default: 0 mV (000) Bit 2 VCLAMP[0] R/W 0 16 mV 00 - 60C, 01 - 80C, 10 - 100C, 11 - 120C Thermal Regulation Threshold Bit 1 TREG[1] R/W 1 Bit 0 TREG[0] R/W 1 Default: 120C (11) 9.5.1.8 Misc Operation Control Register REG07 (reset = 01001011, or 4B) Figure 33. REG07 Misc Operation Control Register Format 7 DPDM_EN R/W 6 TMR2X_EN R/W 5 BATFET_Disable R/W 4 Reserved R/W 3 Reserved R/W 2 Reserved R/W 1 INT_MASK[1] R/W 0 INT_MASK[0] R/W LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Table 15. REG07 Misc Operation Control Register Description BIT FIELD TYPE RESET DESCRIPTION NOTE Force DPDM detection (bq24190) or set default input current limit from PSEL/OTG pins (bq24192, bq24192I) Bit 7 DPDM_EN R/W 0 0 - Not in D+/D- detection; 1 - Force D+/D- detection Default: Not in D+/D- detection (0), Back to 0 after detection complete Safety Timer Setting during Input DPM and Thermal Regulation Bit 6 TMR2X_EN R/W 1 0 - Safety timer not slowed by 2X during Default: Safety timer slowed by 2X (1) input DPM or thermal regulation, 1 - Safety timer slowed by 2X during input DPM or thermal regulation Force BATFET Off Bit 5 BATFET_Disable R/W 0 0 - Allow Q4 turn on, 1 - Turn off Q4 Bit 4 Reserved R/W 0 0 - Reserved Bit 4 Reserved R/W 0 0 - Reserved. Must write "0" Bit 3 Reserved R/W 1 1 - Reserved. Must write "1" Bit 2 Reserved R/W 0 0 - Reserved. Must write "0" Bit 1 INT_MASK[1] R/W 1 0 - No INT during CHRG_FAULT, 1 - INT on CHRG_FAULT Default: INT on CHRG_FAULT (1) Bit 0 INT_MASK[0] R/W 1 0 - No INT during BAT_FAULT, 1 - INT on BAT_FAULT Default: INT on BAT_FAULT (1) Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Default: Allow Q4 turn on(0) Submit Documentation Feedback 33 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 9.5.1.9 System Status Register REG08 Figure 34. REG08 System Status Register Format 7 VBUS_STAT[1] R 6 VBUS_STAT[0] R 5 CHRG_STAT[1] R 4 CHRG_STAT[0] R 3 DPM_STAT R 2 PG_STAT R 1 THERM_STAT R 0 VSYS_STAT R LEGEND: R = Read only; -n = value after reset Table 16. REG08 System Status Register Description BIT FIELD TYPE DESCRIPTION Bit 7 VBUS_STAT[1] R Bit 6 VBUS_STAT[0] R 00 - Unknown (no input, or DPDM detection incomplete), 01 - USB host, 10 - Adapter port, 11 - OTG Bit 5 CHRG_STAT[1] R Bit 4 CHRG_STAT[0] R Bit 3 DPM_STAT R 0 - Not DPM, 1 - VINDPM or IINDPM Bit 2 PG_STAT R 0 - Not Power Good, 1 - Power Good Bit 1 THERM_STAT R 0 - Normal, 1 - In Thermal Regulation Bit 0 VSYS_STAT R 0 - Not in VSYSMIN regulation (BAT > VSYSMIN), 1 - In VSYSMIN regulation (BAT < VSYSMIN) 00 - Not Charging, 01 - Pre-charge (<VBATLOWV), 10 - Fast Charging, 11 - Charge Termination Done 9.5.1.10 Fault Register REG09 Figure 35. REG09 Fault Register Format 7 WATCHDOG_ FAULT R 6 BOOST_ FAULT R 5 4 CHRG_FAULT[1] CHRG_FAULT[0] R 3 BAT_FAULT 2 NTC_FAULT[2] 1 NTC_FAULT[1] 0 NTC_FAULT[0] R R R R R LEGEND: R = Read only; -n = value after reset Table 17. REG09 Fault Register Description BIT FIELD TYPE DESCRIPTION Bit 7 WATCHDOG_FAULT R 0 - Normal, 1- Watchdog timer expiration Bit 6 BOOST_FAULT R 0 - Normal, 1 - VBUS overloaded (OCP), or VBUS OVP in boost mode Bit 5 CHRG_FAULT[1] R Bit 4 CHRG_FAULT[0] R 00 - Normal, 01 - Input fault (VBUS OVP or VBAT < VBUS < 3.8 V), 10 - Thermal shutdown, 11 - Charge Safety Timer Expiration Bit 3 BAT_FAULT R 0 - Normal, 1 - BATOVP Bit 2 NTC_FAULT[2] R Bit 1 NTC_FAULT[1] R 000 - Normal, 001 - TS1 Cold, 010 - TS1 Hot, 011 - TS2 Cold, 100 - TS2 Hot, 101 - Both Cold, 110 - Both Hot Bit 0 NTC_FAULT[0] R 34 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 9.5.1.11 Vender / Part / Revision Status Register REG0A (bq24190 reset = 00100011, or 23; bq24192 reset = 00101011, or 2B; bq24192I reset = 00001011, or 0B) Figure 36. REG0A Vender / Part / Revision Status Register Format 7 Reserved R 6 Reserved R 5 PN[2] R 4 PN[1] R 3 PN[0] R 2 TS_PROFILE R 1 DEV_REG[0] R 0 DEV_REG[1] R LEGEND: R = Read only; -n = value after reset Table 18. REG0A Vender / Part / Revision Status Register Description BIT FIELD TYPE RESET DESCRIPTION Bit 7 Reserved R 0 0 - Reserved Bit 6 Reserved R 0 0 - Reserved bq24190 - 100, bq24192 - 101, bq24192I - 011 Device Configuration Bit 5 PN[2] R 0: (bq24192I) 1: (bq24190/92) Bit 4 PN[1] R 0 Bit 3 PN[0] R 0: (bq24190) 1: (bq24192/92I) Bit 2 TS_PROFILE R 0 0 - Cold/Hot window Bit 1 DEV_REG[0] R 1 11 Bit 0 DEV_REG[1] R 1 Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 35 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 10 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI's customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 10.1 Application Information A typical application consists of the device configured as an I2C controlled power path management device and a single cell Li-Ion battery charger for single cell Li-Ion and Li-polymer batteries used in a wide range of tablets and other portable devices. It integrates an input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and BATFET (Q4) between the system and battery. The device also integrates a bootstrap diode for the high-side gate drive. 10.2 Typical Application bq24190 5V USB SDP/DCP 10F 47nF 6.8F USB SYS: 3.5V-4.35V SW VBUS PMID 1F 1H 10F 10F 10F BTST REGN D+ 4.7F D- SYS PGND 2.2kW STAT VREF SYS BAT 10kW 10kW SDA SCL INT OTG CE Host 353W 10F (1.5A max) 10kW ILIM REGN 5.52kW TS1 TS2 31.23kW Power Pad 10kW (103-AT) Figure 37. bq24190 with D+/D- Detection and USB On-The-Go (OTG) 36 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 Typical Application (continued) bq24192 5V USB or 5V Adapter VBUS PMID 1F 2.2H SYS: 3.5V-4.35V SW 47nF 6.8F 10F 10F BTST REGN 4.7F SYS PGND 2.2kW 10kW SYS PG STAT VREF 10kW BAT 10F 177W (3A max) 10kW SDA SCL INT OTG CE Host PHY ILIM REGN 5.52kW TS1 TS2 31.23kW PSEL 10kW (103-AT) Power Pad Figure 38. bq24192 with PSEL and USB On-The-Go (OTG) bq24192I 5V USB 15V Adapter SYS: 3.5V-4.35V SW VBUS PMID 1F 2.2H 47nF 6.8F 10F 10F BTST REGN 4.7F SYS PGND 2.2kW PG STAT VREF 10kW 10kW SYS BAT 10kW SDA SCL INT OTG CE Host PHY PSEL ILIM 10F 353W (1.5A max) REGN 10kW TS1 TS2 10kW Power Pad Figure 39. bq24192I with PSEL, USB On-The-Go (OTG), No Thermistor Connections Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 37 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com Typical Application (continued) 10.2.1 Design Requirements Table 19. Design Requirements DESIGN PARAMETER EXAMPLE VALUE Input voltage 3.9 V to 17 V Input current limit 3000 mA Fast charge current 4000 mA Boost mode output current 1.3 A 10.2.2 Detailed Design Procedure 10.2.2.1 Inductor Selection The bq24190, bq24192, bq24192I has 1.5-MHz switching frequency to allow the use of small inductor and capacitor values. The Inductor saturation current should be higher than the charging current (ICHG) plus half the ripple current (IRIPPLE): ISAT ICHG + (1/ 2 ) IRIPPLE (5) The inductor ripple current depends on input voltage (VBUS), duty cycle (D = VBAT/VVBUS), switching frequency (fs) and inductance (L): V D (1 - D) IRIPPLE = IN |s L (6) The maximum inductor ripple current happens with D = 0.5 or close to 0.5. Usually inductor ripple is designed in the range of (20 to 40%) maximum charging current as a trade-off between inductor size and efficiency for a practical design. Typical inductor value is 2.2 H. 10.2.2.2 Input Capacitor Input capacitor should have enough ripple current rating to absorb input switching ripple current. The worst case RMS ripple current is half of the charging current when duty cycle is 0.5. If the converter does not operate at 50% duty cycle, then the worst case capacitor RMS current ICIN occurs where the duty cycle is closest to 50% and can be estimated by the following equation: ICIN = ICHG D (1 - D) (7) For best performance, VBUS should be decouple to PGND with 1-F capacitance. The remaining input capacitor should be place on PMID. Low ESR ceramic capacitor such as X7R or X5R is preferred for input decoupling capacitor and should be placed to the drain of the high side MOSFET and source of the low side MOSFET as close as possible. Voltage rating of the capacitor must be higher than normal input voltage level. 25-V rating or higher capacitor is preferred for 15-V input voltage. 10.2.2.3 Output Capacitor Output capacitor also should have enough ripple current rating to absorb output switching ripple current. The output capacitor RMS current ICOUT is given: I ICOUT = RIPPLE 0.29 IRIPPLE 2 3 (8) The output capacitor voltage ripple can be calculated as follows: VOUT aec VOUT o/ 1 DVO = VIN / 8LC| s2 ce o (9) At certain input/output voltage and switching frequency, the voltage ripple can be reduced by increasing the output filter LC. 38 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 The charger device has internal loop compensator. To get good loop stability, the resonant frequency of the output inductor and output capacitor should be designed between 15 kHz and 25 kHz. With 2.2-H inductor, the typical output capacitor value is 20 F. The preferred ceramic capacitor is 6 V or higher rating, X7R or X5R. 10.2.3 Application Performance Plots VBUS 5V/div VBUS 5V/div REGN 5V/div REGN 5V/div SYS 2V/div SYS 2V/div /PG 2V/div IIN 200mA/div 40ms/div 100ms/div VBAT 3.2 V VBAT 3.2 V Figure 40. bq24190 Power Up from USB100 mA Figure 41. bq24192 Power Up with Charge Disabled STAT 2V/div VBUS 5V/div /CE 5V/div REGN 5V/div SW 5V/div SYS 2V/div IBAT 1A/div IBAT 2A/div 100ms/div 400us/div VBUS 5 V Figure 42. bq24192 Power Up with Charge Enabled Figure 43. Charge Enable SYS 3.4V Offset 200mV/div STAT 2V/div /CE 5V/div IIN 2A/div SW 10V/div ISYS 2A/div IBAT 2A/div 2ms/div 4us/div VBUS 5 V, IIN 3 A, Charge Disable VBUS 12 V Figure 44. Charge Disable Figure 45. Input Current DPM Response without Battery Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 39 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com SYS 3.4V offset 200mV/div SW 5V/div ISYS 5A/div IIN 1A/div IL 1A/div IBAT 2A/div 0 400ns/div 2ms/div VBUS 12 V, VBAT 3.8 V, ICHG 3 A VBUS 9 V, IIN 1.5 A, VBAT 3.8 V Figure 47. PWM Switching Waveform Figure 46. Load Transient During Supplement Mode SYS 3.4V offset 100mV/div SW 5V/div SW 5V/div IL 1A/div IL 1A/div 4us/div 400ns/div VBUS 9 V, No Battery, ISYS 10 mA, Charge Disable VBAT 3.8 V, ILOAD 1 A Figure 48. PFM Switching Waveform Figure 49. Boost Mode Switching Waveform VBUS 5V offset 200mV/div IBAT 500mA/div IVBUS 500mA/div 4ms/div VBAT 3.8 V Figure 50. Boost Mode Load Transient 40 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 11 Power Supply Recommendations In order to provide an output voltage on SYS, the bq2419x require a power supply between 3.9 V and 17 V input with at least 100 mA current rating connected to VBUS; or, a single-cell Li-Ion battery with voltage > VBATUVLO connected to BAT. The source current rating needs to be at least 3 A in order for the buck converter of the charger to provide maximum output power to SYS. 12 Layout 12.1 Layout Guidelines The switching node rise and fall times should be minimized for minimum switching loss. Proper layout of the components to minimize high frequency current path loop (see Figure 51) is important to prevent electrical and magnetic field radiation and high frequency resonant problems. Here is a PCB layout priority list for proper layout. Layout PCB according to this specific order is essential. 1. Place input capacitor as close as possible to PMID pin and GND pin connections and use shortest copper trace connection or GND plane. 2. Place inductor input terminal to SW pin as close as possible. Minimize the copper area of this trace to lower electrical and magnetic field radiation but make the trace wide enough to carry the charging current. Do not use multiple layers in parallel for this connection. Minimize parasitic capacitance from this area to any other trace or plane. 3. Put output capacitor near to the inductor and the IC. Ground connections need to be tied to the IC ground with a short copper trace connection or GND plane. 4. Route analog ground separately from power ground. Connect analog ground and connect power ground separately. Connect analog ground and power ground together using power pad as the single ground connection point. Or using a 0- resistor to tie analog ground to power ground. 5. Use single ground connection to tie charger power ground to charger analog ground. Just beneath the IC. Use ground copper pour but avoid power pins to reduce inductive and capacitive noise coupling. 6. Decoupling capacitors should be placed next to the IC pins and make trace connection as short as possible. 7. It is critical that the exposed power pad on the backside of the IC package be soldered to the PCB ground. Ensure that there are sufficient thermal vias directly under the IC, connecting to the ground plane on the other layers. 8. The via size and number should be enough for a given current path. See the EVM design for the recommended component placement with trace and via locations. For the VQFN information, refer to SCBA017 and SLUA271. Figure 51. High Frequency Current Path Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 41 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 12.2 Layout Example CPMID PGND Top layer L CBUS PGND CREGN CBTST RBTST 2nd layer (PGND) PGND VBUS CSYS PIN1 via VSYS PGND VBAT PGND PGND on Top layer CBAT PGND PGND Figure 52. Layout Example Diagram 42 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I bq24190, bq24192, bq24192I www.ti.com SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 13 Device and Documentation Support 13.1 Documentation Support 13.1.1 Related Documentation bq2419x EVM (PWR021) User's Guide (SLUUA14) Quad Flatpack No-Lead Logic Packages Application Report (SCBA017) QFN/SON PCB Attachment Application Report (SLUA271) 13.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 20. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY bq24190 Click here Click here Click here Click here Click here bq24192 Click here Click here Click here Click here Click here bq24192I Click here Click here Click here Click here Click here 13.3 Trademarks All trademarks are the property of their respective owners. 13.4 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 13.5 Glossary SLYZ022 -- TI Glossary. This glossary lists and explains terms, acronyms, and definitions. Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I Submit Documentation Feedback 43 bq24190, bq24192, bq24192I SLUSAW5B - JANUARY 2012 - REVISED DECEMBER 2014 www.ti.com 14 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 44 Submit Documentation Feedback Copyright (c) 2012-2014, Texas Instruments Incorporated Product Folder Links: bq24190 bq24192 bq24192I PACKAGE OPTION ADDENDUM www.ti.com 15-Apr-2017 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (C) Device Marking (4/5) BQ24190RGER ACTIVE VQFN RGE 24 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ24190 BQ24190RGET ACTIVE VQFN RGE 24 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ24190 BQ24192IRGER ACTIVE VQFN RGE 24 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ 24192I BQ24192IRGET ACTIVE VQFN RGE 24 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ 24192I BQ24192RGER ACTIVE VQFN RGE 24 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ24192 BQ24192RGET ACTIVE VQFN RGE 24 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ24192 HPA01186RGER ACTIVE VQFN RGE 24 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ24190 HPA02150RGER ACTIVE VQFN RGE 24 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 BQ24190 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com (4) 15-Apr-2017 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. 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Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 25-Feb-2018 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing BQ24190RGER VQFN RGE 24 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24190RGET VQFN RGE 24 250 180.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24192IRGER VQFN RGE 24 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24192IRGET VQFN RGE 24 250 180.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24192RGER VQFN RGE 24 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24192RGET VQFN RGE 24 250 180.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 25-Feb-2018 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ24190RGER VQFN RGE 24 3000 367.0 367.0 35.0 BQ24190RGET VQFN RGE 24 250 210.0 185.0 35.0 BQ24192IRGER VQFN RGE 24 3000 367.0 367.0 35.0 BQ24192IRGET VQFN RGE 24 250 210.0 185.0 35.0 BQ24192RGER VQFN RGE 24 3000 367.0 367.0 35.0 BQ24192RGET VQFN RGE 24 250 210.0 185.0 35.0 Pack Materials-Page 2 GENERIC PACKAGE VIEW RGE 24 VQFN - 1 mm max height PLASTIC QUAD FLATPACK - NO LEAD Images above are just a representation of the package family, actual package may vary. Refer to the product data sheet for package details. 4204104/H PACKAGE OUTLINE VQFN - 1 mm max height RGE0024H PLASTIC QUAD FLATPACK- NO LEAD A 4.1 3.9 B 4.1 3.9 PIN 1 INDEX AREA 1 MAX C SEATING PLANE 0.05 0.00 0.08 C (0.2) TYP 2X 2.5 12 7 20X 0.5 6 13 25 2X 2.5 SYMM 1 PIN 1 ID (OPTIONAL) 18 24X 0.30 0.18 24 19 SYMM 24X 0.48 0.28 0.1 0.05 C A B C 4219016 / A 08/2017 NOTES: 1. 2. 3. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. This drawing is subject to change without notice. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance. www.ti.com EXAMPLE BOARD LAYOUT VQFN - 1 mm max height RGE0024H PLASTIC QUAD FLATPACK- NO LEAD (3.825) ( 2.7) 19 24 24X (0.58) 24X (0.24) 1 18 20X (0.5) 25 SYMM (3.825) 2X (1.1) TYP 6 13 (R0.05) 12 7 2X(1.1) SYMM LAND PATTERN EXAMPLE SCALE: 20X 0.07 MAX ALL AROUND 0.07 MIN ALL AROUND METAL SOLDER MASK OPENING SOLDER MASK OPENING NON SOLDER MASK DEFINED (PREFERRED) METAL UNDER SOLDER MASK SOLDER MASK DEFINED SOLDER MASK DETAILS 4219016 / A 08/2017 NOTES: (continued) 4. 5. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature number SLUA271 (www.ti.com/lit/slua271). Solder mask tolerances between and around signal pads can vary based on board fabrication site. www.ti.com EXAMPLE STENCIL DESIGN VQFN - 1 mm max height RGE0024H PLASTIC QUAD FLATPACK- NO LEAD (3.825) 4X ( 1.188) 19 24 24X (0.58) 24X (0.24) 1 18 20X (0.5) SYMM (3.825) (0.694) TYP 6 13 (R0.05) TYP METAL TYP 25 7 SYMM 12 (0.694) TYP SOLDER PASTE EXAMPLE BASED ON 0.125 mm THICK STENCIL EXPOSED PAD 78% PRINTED COVERAGE BY AREA SCALE: 20X 4219016 / A 08/2017 NOTES: (continued) 6. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations.. www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated (TI) reserves the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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