LM3658SDX-B/NOPB - NATIONAL SEMICONDUCTOR

LM3658

LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications

Literature Number: SNVS328E

November 2006

LM3658

Dual Source USB/AC Li Chemistry Charger IC for Portable

Applications

General Description

The LM3658 is a single chip charger IC designed for handheld

applications. It can safely charge and maintain a single cell

Li-Ion/Polymer battery operating from an AC wall adapter or

USB power source. Input power source selection of USB/AC

is automatic. With both power sources present, the AC power

source has priority. Charge current is programmed through

an external resistor when operating from an AC wall adapter

allowing charge currents from 50 mA to 1000 mA. When the

battery is charged using USB power, charge currents of 100

mA or 500 mA are pin-selectable. The termination voltage is

controlled to within ±0.35% of 4.2V.

The LM3658 requires few external components and inte-

grates internal power FETs, reverse current protection and

current sensing. The internal power FETs are thermally reg-

ulated to obtain the most efficient charging rate for a given

ambient temperature.

The LM3658 operates in five modes: pre-qualification mode,

constant-current mode, constant-voltage mode, top-off mode

and maintenance mode. Additionally, the charger IC operates

as a linear regulator in “LDO mode”, when the AC wall adapter

is connected and no battery is present. Optimal battery man-

agement is obtained through thermal regulation, battery tem-

perature measurement and multiple safety timers. The

LM3658 provides two open-drain outputs for LED status in-

dication or connection to GPIOs.

Features

■Integrated power FETs with thermal regulation

■Charges from either an AC wall adapter or USB power

source with automatic source selection

■50 mA to 1000 mA charge currents using AC wall adapter

■Pin-selectable USB charge currents of 100 mA or

500 mA

■LDO mode with 1A of source current is automatically

invoked when the battery is absent and the AC wall

adapter is connected

■Continuous battery temperature monitoring

■Built-in multiple safety timers

■Charge status indication

■Continuous over-current and temperature protection

■Near-depleted battery pre-conditioning

■Sleep mode with ultra low quiescent current

■On-board Kelvin-sensing achieves ±0.35% termination

accuracy

■Maintenance mode with automatic recharge

■Thermally enhanced 3 mm x 3 mm LLP package

Applications

■Smartphones

■Digital still cameras

■PDAs

■Hard Drive and flash-based MP3 players

■USB-powered devices

Typical Application

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LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications

Connection Diagram and Package Mark Information

LLP10 Package Drawing

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Note: The actual physical placement of the package marking will vary from part to part. The package marking “X” is the manufacturing plant code. “YY” is a 2-

digit date code, and "ZZ" for die traceability. These codes will vary considerably. "L111B” identifies the device (part number, option, etc.).

Pin Descriptions

Pin # Name Description

1 CHG_IN AC wall adapter input pin.

2 USBpwr USB power input pin.

3 GND Power and signal ground pin.

4 USB_sel Pulling this pin low limits the USB charge current to 100 mA. Pulling this pin high limits the USB charge current

to 500 mA.

5 EN_b Pulling this pin low enables the charger. Pulling this pin high disables the charger.

6 STAT2 Active low open-drain output. Indicates charger status. This pin is capable of driving an LED as well as GPIOs.

See Operation Description section for more detail.

7 STAT1 Active low open-drain output. Indicates charger status. This pin is capable of driving an LED as well as GPIO.

See Operation Description section for more detail.

8 ISET A resistor is connected between this pin and GND. The resistor value determines the full-rate charge current

when using the AC source.

9 TSBattery temperature sense pin. This pin must be connected to battery pack’s temperature sense output pin.

For the LM3658SD-B version, leaving this pin open indicates that the battery pack is not present. The charger

IC will invoke LDO mode if this pin is left floating. See Operation Description section for more detail.

10 BATT Positive battery terminal connection.

Ordering Information

Order Number 5 Hour

Timer

Selectable

Timer LDO Mode No LDO

Mode

Package

Marking Supplied As

LM3658SD X X L111B 1000 units, Tape-and-Reel

LM3658SDX X X L111B 4500 units, Tape-and-Reel

LM3658SD-A X X L155B 1000 units, Tape-and-Reel

LM3658SDX-A X X L155B 4500 units, Tape-and-Reel

LM3658SD-B X X L156B 1000 units, Tape-and-Reel

LM3658SDX-B X X L156B 4500 units, Tape-and-Reel

For more information on the various options, please refer to Operation Description section.

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LM3658

Absolute Maximum Ratings (Notes 1, 2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

CHG_IN, USBpwr (VCC)−0.3V to +6.5V

All other pins except GND −0.3V to CHG_IN or

USBpwr

Power Dissipation (Note 3) Internally Limited

Junction Temperature (TJ-MAX) +150°C

Storage Temperature Range −65°C to +150°C

ESD Rating (Note 4)

Human Body Model:

Machine Model:

2.0 kV

200V

Operating Ratings (Notes 1, 2)

Input Voltage Range for CHG_IN 4.5V to 6.0V

Input Voltage Range for USB_pwr 4.35V to 6.0V

Recommended Load Current 0 to 1000 mA

Power Dissipation(Note 3) Internally Limited

Junction Temperature (TJ) Range −40°C to +125°C

Ambient Temperature (TA) Range −40°C to +85°C

Thermal Properties

θJA, Junction-to-Ambient Thermal 54°C/W

Resistance (Note 5)

Electrical Characteristics Unless otherwise noted, VCC (VCHG_IN and/or VUSBpwr) = 5V, VBATT = 3.5V.

CCHG_IN = 1 µF, CUSBpwr = 1 µF, CBATT = 1 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits

appearing in boldface type apply over TJ = 0°C to +85°C. (Notes 2, 6, 7)

Symbol Parameter Conditions Min Typ Max Units

CHARGER

VCHG_IN AC Wall Adapter Input

Voltage Range

4.5 6.0 V

VUSBpwr USB Input Voltage

Range

4.35 6.0 V

ICC_PD Quiescent Current in

Power Down Mode

VBATT > VCC–VOK_CHG 1 5µA

ICC_STBY Quiescent Current in

Standby Mode

VBATT < VCC − VOK_CHG

VCC > VPOR

EN_b = High

400 600 µA

IBATT_PD Battery Leakage

Current in Power Down

Mode

VBATT > VCC + VOK_CHG

0.01 2.0 µA

IBATT_MAINT Battery Leakage

Current in Maintenance

Mode

STAT1 = off, STAT2 = on, adapter or USB

connected, VBATT = 4.2V 7 15 µA

VOK_CHG CHG_IN or USBpwr

OK Trip-Point

VCC – VBATT (Rising)

VCC – VBATT (Falling) 200

50 mV

VPOR VCC POR Trip-Point VCC (Rising)

VBATT < VCC – VOK_CHG

VFULL_RATE < VBATT < VTERM

3.0 V

VTERM Battery Charge

Termination Voltage

ICHG = 10% of its value when VBATT = 3.5V 4.2 V

Battery Charge

Termination Voltage

Tolerance

TA = 25°C −0.35 +0.35

TA = 0°C to 85°C −1.5 +1.5

VCHG_DO CHG_IN Drop-Out

Voltage

VBATT = VTERM, ICHG = 1A

VCC > VBATT + VCHG_DO_MAX

500 mV

VUSB_DO USBpwr Drop-Out

Voltage

VBATT = VTERM, USB_sel = high

VCC > VBATT + VUSB_DO_MAX

250 mV

ICHG CHG_IN Full-Rate

Charge Current Range

(see full-rate charge

mode description)

6V ≥ VCC ≥ 4.5V

VBATT < VCC – VOK_CHG

VFULL_RATE < VBATT < VTERM

ICHG = KISET/RISET

50 1000 mA

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LM3658

Symbol Parameter Conditions Min Typ Max Units

ICHG CHG_IN Full Rate

Charge Current

RISET = 10kΩ220 245 270

RISET = 5 kΩ465 500 535

RISET = 3.3kΩ700 760 820

KISET Charge Current Set

Coefficient

ICHG = KISET/RISET (see

full-rate charge mode

description)

6V ≥ VCC ≥ 4.5V

VBATT < VCC – VOK_CHG

VFULL_RATE < VBATT < VTERM 2500 AΩ

VISET Charge Current Set

Voltage

6V ≥ VCC ≥ 4.5V

VBATT < VCC – VOK_CHG

VFULL_RATE < VBATT < VTERM

2.5 V

IUSB_L USB Full-Rate Charge

Low Current

80 90 100 mA

IUSB_H USB Full-Rate Charge

High Current

400 450 500 mA

IPREQUAL Pre-Qualification

Current

VBATT = 2V, for both AC adapter and USB 35 45 55 mA

VFULL_RATE Full-Rate Qualification

Threshold

VBATT rising, transition from pre-qualification to

full-rate charging 2.9 3.0 3.1 V

Full Rate Hysteresis VBATT falling 50 60 70 mV

IEOC End-of-Charge

Current, Percent from

Full-Range Current

6V ≥ VCC ≥ 4.5V

VBATT < VCC – VOK_CHG

VFULL_RATE < VBATT < VTERM

7911 %

ITOPOFF Minimum Top-Off

Charge Current

6V ≥ VCC ≥ 4.5V

VBATT < VCC – VOK_CHG

VBATT = VTERM

1.25 2.5 3.75 %

VRESTART Restart Threshold

Voltage

VBATT falling, transition from EOC to pre-

qualification mode 3.94 4.0 4.07 V

VTL Battery Temperature

Sense Comparator

Low-Voltage Threshold

0.46 0.49 0.52 V

VTH Battery Temperature

Sense Comparator

High-Voltage

Threshold

2.44 2.49 2.54 V

ITSENSE Battery Temperature

Sense Current

94 100 106 µA

TREG Regulated Junction

Temperature

120 °C

TSD Thermal Shutdown

Temperature

165 °C

VTLDO LDO mode detection

threshold

TS pin voltage for entry into LDO mode.

For LM3658SD-B only 3.95 4.0 v

VLDO LDO Mode Regulation 6V ≥ VCHG_IN ≥ 4.5V

TS= Floating

IBATT = 100mA

-3.0 4.2 +3.0 %

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LM3658

Symbol Parameter Conditions Min Typ Max Units

DETECTION AND TIMING

TPOK Power OK Deglitch

Time

VBATT < VCC – VOK_CHG 40 60 100 ms

TPREQUAL Pre-Qualification Timer 27 30 33 mins

TPQ_FULL Deglitch Time for Pre-

Qualification to Full-

Rate Charge Transition

270 300 330 ms

TFULL_PQ Deglitch Time for Full-

Rate to Pre-

Qualification Transition

270 300 330 ms

TCHG Charge Timer LM3658SD, LM3658SD-B and LM3658SD-A

with USB_sel=high 270 300 330 mins

LM3658SD-A with USB_sel=low 540 600 660

TEOC Deglitch Time for End-

of-Charge Transition

270 300 330 ms

TBATTEMP Deglitch Time for

Battery Temperature

Fault

20 40 80 ms

TDGL Deglitch Time for EN_b

and USB_sel Pins

20 40 80 ms

TITOPOFF Deglitch Time for

ITOPOFF

270 300 330 ms

TTOPOFF Top-Off Charging

Timer

LM3658SD, LM3658SD-B and LM3658SD-A

with USB_sel=high 27 30 33 mins

LM3658SD-A with USB_sel=low 54 60 66

I/O

VIL Low-Level Input

Voltage

EN_b 0 0.7 V

USB_sel 1.5

VIH High-Level Input

Voltage

EN_b 1.4 V

USB_sel 2.5

IOL Low-Level Output

Current

STAT1, STAT2, output voltage = 0.25V 10 25 mA

IOH High-Level Output

Current

STAT1, STAT2, output voltage = 6.0V 0.01 1µA

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation

of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,

see the Electrical Characteristics tables.

Note 2: All voltages are with respect to the potential at the GND pin.

Note 3: The LM3658 has built-in thermal regulation to regulate the die temperature to 120ºC. See Operation Description section for more detail.

Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged

directly into each pin. MIL-STD-883 3015.7

Note 5: Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists,

special care must be paid to thermal dissipation issues in board design. Please refer to application note AN1187 for more detail.

Note 6: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.

Note 7: LM3658 is not intended as a Li-Ion battery protection device; battery used in this application should have an adequate internal protection.

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LM3658

Block Diagram

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LM3658

Li-Ion Charging Profile

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LM3658

LM3658 Operation Description

POWER-DOWN MODE

The LM3658 will power down automatically when the voltage

on the USBpwr or CHG_IN pin drops below the battery volt-

age with an amount that is equal to VOK_CHG (VBATT > VCC -

VOK_CHG). Power-Down mode shuts off the internal power

FETs as well as the open-drain pull-down transistors on the

status pins STAT1 and STAT2. The only current consumed

by the LM3658 is an ultra-low quiescent current of 1 µA typi-

cal.

POWER-ON RESET

As soon as the voltage of one of the power sources rises

above VBATT + VOK_CHG, the charger will wake up. However,

charging will not be initiated unless the supply voltage source

exceeds the VPOR.

AUTOMATIC POWER SOURCE DETECTION

When the voltage of one of the power sources exceeds the

VPOR threshold, the LM3658 detects which power source is a

valid charge supply. When both supply voltages are valid and

present, CHG_IN will automatically be selected over USBpwr.

The USBpwr will be the designated power source only if no

CHG_IN is present or when the voltage on the CHG_IN pin is

less than the battery voltage.

THERMAL POWER FET REGULATION

The internal power FETs are thermally regulated to the junc-

tion temperature of 120ºC to guarantee optimal charging of

the battery. At all times is the charge current limited by the

ISET resistor setting, the USB 100 mA/500 mA selection, or

the 100ºC junction temperature of the LM3658. The charge

current is therefore a function of the charge current settings,

the thermal conductivity of the package and the ambient tem-

perature as described in the following equation:

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Where TA is the ambient temperature and θJA is the thermal

resistance of the package. Thermal regulation guarantees

maximum charge current and superior charge rate without

exceeding the power dissipation limits of the LM3658.

PRE-QUALIFICATION MODE

During pre-qualification, STAT1 is on and STAT2 is off, and

the charger supplies a constant current of 50 mA to the bat-

tery. When the battery voltage reaches VFULL_RATE, the charg-

er transitions from pre-qualification to full-rate charging. The

pre-qualification mode aborts when the battery doesn’t reach

VFULL_RATE within the time allowed in TPREQUAL timer. In this

event, charging stops and STAT1 and STAT2 will both be on,

indicating a bad battery condition.

CHG_IN FULL-RATE CHARGING MODE

The full-rate charge cycle is initiated following the successful

completion of the pre-qualification mode. Timer TCHG starts to

count when the charger enters full-rate charging, with STAT1

on and STAT2 off. When charging with an AC wall adapter,

the full-rate charge current is proportional to the value of the

resistor that is connected to the ISET pin as described in the

following equation:

It is recommended to charge Li-Ion batteries at 1C rate, where

“C” is the capacity of the battery. As an example, it is recom-

mended to charge a 750 mAh battery at 750 mA, or 1C.

Charging at a higher rate can cause damage to the battery.

USBpwr FULL-RATE CHARGING MODE

The full-rate charge cycle is initiated following the successful

completion of the pre-qualification mode. Timer TCHG starts to

count when the charger enters full-rate charging, with STAT1

on and STAT2 off. If the USB bus provides the charger supply,

then the default full-rate charge current is 100 mA max unless

the USB_sel pin is pulled high, which sets the charge current

to 500 mA max.

CONSTANT-VOLTAGE CHARGING MODE AND END-OF-

CHARGE (EOC) DETECTION

The battery voltage increases rapidly as a result of full-rate

charging and will reach the 4.2V termination voltage, trigger-

ing the constant-voltage charge cycle. Timer TCHG continues

to count in this cycle. STAT1 is on and STAT2 is off. The

charge current gradually decreases during constant-voltage

charging until it reaches the End-Of-Charge (EOC), which is

equal to 10% of the full-rate current set either by the resistor

connected to the ISET pin or the USB_sel pin. If Timer TCHG

times out before EOC is reached, charging stops and STAT1

and STAT2 will both be on, indicating a bad battery condition.

TOP-OFF CHARGING MODE

Once EOC has been reached, a top-off cycle continues to

charge the battery. Timed top-off cycle provides optimal bat-

tery capacity following a complete charge cycle. During this

cycle, charging terminates when ICHG reaches 2.5% of the full-

rate charge current or when TTOPOFF times out, whichever

occurs first. STAT1 will turn off and STAT2 will turn on once

the top-off cycle completes successfully, indicating that

charging is done.

MAINTENANCE MODE

Maintenance mode begins immediately after the charger suc-

cessfully finishes the top-off cycle. In the maintenance mode,

the battery voltage is being monitored by the LM3658 contin-

uously. If the battery voltage drops 200 mV below VTERM, a

new full-rate charge cycle starts to replenish the battery. As

this new full-rate charge cycle begins, STAT1 will turn on and

STAT2 will turn off, and all the timers will reset. Refer to the

LM3658 Flowchart.

CHARGE STATUS OUTPUTS

The LM3658 provides two open-drain outputs STAT1 and

STAT2 that can be connected to external LEDs or to General

Purpose I/O’s (GPIO) of a peripheral IC. All charge status of

the LM3658 is illustrated in Table 1. “ON” means that STATx

pin is pulled low as its pull-down transistor is turned on, rep-

resenting a logic 0.

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LM3658

TABLE 1. Status Pins Summary

STAT1 STAT2 Condition

OFF OFF Power-Down, charging is suspended

or interrupted

ON OFF Pre-qualification mode, CC and CV

charging, Top-off mode

OFF ON Charge is completed

ON ON Bad battery (Safety timer expired), or

LDO mode

SAFETY TIMERS

In order to prevent endless charging of the battery, which can

cause damage to the battery, there are three safety timers

that forcefully terminate charging if the charging mode is not

completed within the time allowed.

Pre-Qualification Timer (TPREQUAL)

The pre-qualification timer starts with the initiation of the pre-

qualification mode and allows 30 minutes to transition from

pre-qualification to full rate charging. If the battery voltage

does not reach VFULL_RATE in 30 minutes, charging stops and

status pins STAT1 and STAT2 both turn on to indicate a bad

battery status.

Charger Timer (TCHG)

The charge timer starts with the initiation of full-rate charging

and has a duration of 5 hours for the LM3658. If the charge

current does not reach EOC, charging stops and STAT1 and

STAT2 both turn on to indicate a bad battery status. Once the

charge control declares a bad battery, removing the input

source is the only means to clear the bad battery status.

Top-Off Timer (TTOPOFF)

Once the charger successfully completes constant current

constant voltage charging, it enters top-off mode and starts

TTOPOFF timer. Topoff lasts 30 minutes for the LM3658. During

top-off, charging stops when TTOPOFF reaches its count or

when ICHG reaches 2.5% of the full-rate charge current. There

is no time-out condition in top-off mode.

When charging is interrupted either by battery temperature

out of range or disabling the LM3658, the applicable safety

timer will store its count value for the duration of the interrup-

tion and subsequently resumes counting from its stored count

value when charging continues, only if the charger resumes

to the same operation mode it was in before the interrupt.

The LM3658SD-A version has selectable timers for TCHG and

TTOPOFF. Based on the logic level applied to the USB_sel pin,

timers can be chosen as follow:

Input USB_SEL TPREQUAL TCHG TTOPOFF

CHG_IN Low 30 minutes 10 hours 60 minutes

CHG_IN High 30 minutes 5 hours 30 minutes

USBpwr Low 30 minutes 10 hours 60 minutes

USBpwr High 30 minutes 5 hours 30 minutes

BATTERY TEMPERATURE MONITORING (SUSPEND

MODE)

The LM3658 is equipped with a battery thermistor interface to

continuously monitor the battery temperature by measuring

the voltage between the TS pin and ground. Charging is al-

lowed only if the battery temperature is within the acceptable

temperature range set by a pair of internal comparators inside

the LM3658. If the battery temperature is out of range, STAT1

and STAT2 both turn off and charging is suspended. Timer

holds its count value.

The TS pin is only active during charging and draws no current

from the battery when no external power source is present.

If the TS pin is not used in the application, it should be con-

nected to GND through 10kΩ pulldown resistor.

When the TS pin is left floating (battery removal), then the

charger will be disabled as the TS voltage exceeds the upper

temperature limit.

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The LM3658 battery temperature feature is tailored to use

negative temperature coefficient (NTC) 103AT thermistors

with 10kΩ impedance. If alternative thermistors need to be

used in the system, supplemental external resistors are need-

ed to create a circuit with equivalent impedance.

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DISABLING CHARGER (CHARGE INTERRUPT MODE)

Charging can be safely interrupted by pulling the EN_b pin

high and charging can resume upon pulling the EN_b pin low.

The enable pin can be permanently tied to GND with no extra

current consumption penalty during power down mode. When

the charger is disabled, timer holds its count value, and

STAT1 and STAT2 are both off.

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LM3658

LDO MODE (AVAILABLE ONLY IN LM3658SD-B

VERSION)

The LM3658SD-B version enters LDO mode when the Ts pin

is floating and AC wall adapter is still connected to CHG_IN

pin. In LDO mode, STAT1 and STAT2 are both on. The

LM3658SD-B becomes a linear regulator capable of deliver-

ing 1A of source current. Normally the Ts pin is connected to

the thermistor from the battery pack for temperature monitor-

ing purpose. If this pin is disconnected, the LM3658SD-B

assumes that there is no battery present and will automati-

cally invoke the LDO mode. LDO mode allows applications to

operate without a battery provided that the AC wall adapter

supplies power to the CHG_IN pin. The LDO mode is not

possible in USB mode.

For the other versions of the LM3658, floating the Ts pin does

not invoke LDO mode. Instead, it will go to suspend mode.

Please refer to “ Battery Temperature Monitoring” section for

more detail.

5 HOUR/ 10 HOUR SELECTABLE TIMER (AVAILABLE

ONLY IN LM3658SD-A VERSION)

The LM3658SD-A allows the user to select between 5 hour

or 10 hour timer based on the polarity of the USB_sel pin, in

both CHG_IN mode and USBpwr mode. By pulling the

USB_sel pin high, the timer is set to 5 hours. In the USBpwr

mode, the polarity of the USB_sel pin determines the charge

current as well as the timer. In CHG_IN mode, the polarity of

the USB_sel pin determines only the timer. The charge cur-

rent is set by the resistor at Iset pin.

INPUT/OUTPUT BYPASS CAPACITORS

Care should be taken to support the stability of the charge

system by connecting a 1 µF capacitor as close as possible

to the BATT pin. An input capacitor ranging from 1.0 µF–

10.0 µF must be connected to the CHG_IN and USBpwr input

pins. Low cost ceramic capacitors can be selected.

THERMAL PERFORMANCE OF THE LLP PACKAGE

The LM3658 is a monolithic device with integrated power

FETs. For that reason, it is important to pay special attention

to the thermal impedance of the LLP package and to the PCB

layout rules in order to maximize power dissipation of the LLP

package.

The LLP package is designed for enhanced thermal perfor-

mance and features an exposed die attach pad at the bottom

center of the package that creates a direct path to the PCB

for maximum power dissipation. Compared to the traditional

leaded packages where the die attach pad is embedded in-

side the molding compound, the LLP reduces one layer in the

thermal path.

The thermal advantage of the LLP package is fully realized

only when the exposed die attach pad is soldered down to a

thermal land on the PCB board with thermal vias planted un-

derneath the thermal land. Based on thermal analysis of the

LLP package, the junction-to-ambient thermal resistance

(θJA) can be improved by a factor of two when the die attach

pad of the LLP package is soldered directly onto the PCB with

thermal land and thermal vias, as opposed to an alternative

with no direct soldering to a thermal land. Typical pitch and

outer diameter for thermal vias are 1.27 mm and 0.33 mm

respectively. Typical copper via barrel plating is 1 oz, although

thicker copper may be used to further improve thermal per-

formance. The LM3658 die attach pad is connected to the

substrate of the IC and therefore, the thermal land and vias

on the PCB board need to be connected to ground (GND pin).

For more information on board layout techniques, refer to Ap-

plication Note 1187 “Leadless Lead Frame Package (LLP).”

This application note also discusses package handling, sol-

der stencil and the assembly process.

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LM3658

LM3658 FLOWCHARTS

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LM3658 Flowchart

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LM3658

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LM3658 USBpwr Mode Flowchart

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LM3658 CHG_IN Mode Flowchart

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LM3658

Physical Dimensions inches (millimeters) unless otherwise noted

LLP10 Package Drawing

NS Package Number SDA10A

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LM3658

Notes

LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications

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