FUJITSU MICROELECTRONICS DATA SHEET DS04-27247-3E ASSP for Power Management Applications (Rechargeable battery) DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery MB39A119 DESCRIPTION The MB39A119 is the N-ch MOS drive of the synchronous rectification type DC/DC converter IC using pulsewidth modulation (PWM) type that can charge Li-ion battery from 1 cell to 4 cells and suitable for down-conversion. This IC integrates built-in comparator for the voltage detection of the AC adapter and switches the power supply to the AC adapter or battery automatically, enabling supply it to system. In addition, the constant voltage control state detection function is built in, which prevents mis-detecting the full charge. The MB39A119 provides a wide range of power supply voltage and low standby current, high efficiency, making it ideal for use as a built-in charge device in products such as notebook PC. FEATURES * * * * * * * * * * * * * * * * * High efficiency : 97 % (Max) High-frequency operation : 1 MHz (Max) Built-in off time control function Built-in voltage detection function of AC adapter (ACOK, XACOK terminal) Preventing mis-detection for the full charge by the constant voltage control state detection function (CVM terminal) Built-in two constant current control circuits Analog control of constant current value is possible ( + INE1, + INE2 terminal) Built-in output stage for N-ch MOS FET synchronous rectification Built-in charge stop function at low input voltage Output voltage setting accuracy : 4.2 V 0.74 % (Ta= - 10 C to + 85 C) Built-in high accuracy charge current detection amplifier : 4 % (At input voltage difference 100 mV with Voltage gain 24.5 (V/V) Built-in high accuracy input current detection amplifier : 3 % (At input voltage difference 100 mV with Voltage gain 25 (V/V) Arbitrary output voltage can be set by external resistor In IC standby mode, output voltage setting resistor is made to be open to prevent inefficient current loss Quiescent current : 1.9 mA (Typ) Standby current : 0 A (Typ) Package : QFN28 Copyright(c)2005-2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved 2008.6 MB39A119 PIN ASSIGNMENT CB OUT-1 VS VB OUT-2 PGND XACOK (TOP VIEW) 28 27 26 25 24 23 22 GND +INC1 3 19 VREF ACIN 4 18 RT ACOK 5 17 CS CVM 6 16 OUTD +INE1 7 15 -INE3 8 9 10 11 12 13 14 FB123 20 -INE2 2 +INE2 -INC1 -INC2 CTL +INC2 21 OUTC2 1 -INE1 VCC (LCC-28P-M12) Note : Connect IC's radiation board at bottom side to potential of GND. 2 DS04-27247-3E MB39A119 PIN DESCRIPTION Pin No. Pin Name I/O Description 1 VCC Power supply terminal for reference voltage and control circuit. 2 -INC1 I Input current detection amplifier (Current Amp1) input terminal. 3 + INC1 I Input current detection amplifier (Current Amp1) input terminal. 4 ACIN I AC adapter voltage detection block (AC Comp.) input terminal. 5 ACOK O AC adapter voltage detection block (AC Comp.) output terminal. ACOK = L when ACIN = H, ACOK = Hi-Z when ACIN = L, ACOK = Hi-Z when CTL = L 6 CVM O Constant voltage control state detection block (CV Comp.) output terminal. 7 + INE1 I Error amplifier (Error Amp1) non-inverted input terminal. 8 -INE1 I Error amplifier (Error Amp1) inverted input terminal. 9 OUTC2 O Charge current detection amplifier (Current Amp2) output terminal. 10 + INC2 I Charge current detection amplifier (Current Amp2) input terminal. 11 -INC2 I Charge current detection amplifier (Current Amp2) and low input voltage detection comparator (UV Comp.) input terminal. 12 + INE2 I Error amplifier (Error Amp2) non-inverted input terminal. 13 - INE2 I Error amplifier (Error Amp2) inverted input terminal. 14 FB123 O Error amplifier (Error Amp1, 2, 3) output terminal. 15 -INE3 I Error amplifier (Error Amp3) inverted input terminal. 16 OUTD O This terminal is set to Hi-Z to prevent loss of current through the output voltage setting resistor when IC is standby mode. OUTD = Hi-Z when CTL = L OUTD = L when CTL = H 17 CS Soft-start capacitor connection terminal. 18 RT Triangular wave oscillation frequency setting resistor connection terminal. 19 VREF O Reference voltage output terminal. 20 GND Ground terminal. 21 CTL I Power supply control terminal for DC/DC converter block. 22 XACOK O AC adapter voltage detection block (AC Comp.) output terminal. XACOK = Hi-Z when ACIN = H, XACOK = L when ACIN = L, XACOK = Hi-Z when CTL = L 23 PGND Ground terminal. 24 OUT-2 O External synchronous rectification side FET gate drive output terminal. 25 VB O Bias output terminal for output circuit. 26 VS External main side FET source conneciton terminal. 27 OUT-1 O External main side FET gate drive output terminal. 28 CB Boot strap capacitor connection terminal. The capacitor is connected between the CB terminal and the VS terminal. DS04-27247-3E 3 MB39A119 BLOCK DIAGRAM ACIN 4 ACOK 5 XACOK 22 CVM 6 <CV Comp.> - <AC Comp.> + + - 2.0 V +INC1 3 -INC1 2 2.6 V 0.1 V <UV Comp.> + <Current Amp1> + x25 - 100 k 3.1 V 5 CB 28 + - -INE2 13 -2.5 V -1.5 V OUTC2 9 <Current Amp2> + +INC2 10 -INC2 11 x24.5 - +INE2 12 25 VB <PWM Comp.> - + +INE1 7 5.0 V -INC2 (VO) <Error Amp1> -INE1 8 VB Reg. - 27 OUT-1 Drv-1 Drive logic Hi Side Only VCC 1 26 VS 24 OUT-2 Drv-2 <Error Amp2> Off time Control - + 23 PGND H: UVLO, UV release FB123 14 <UVLO> VCCUVLO <Error Amp3> - -INE3 15 + 4.2 V OUTD 16 VBUVLO Slope Control VREFUVLO + - <SOFT> VREF 2.6 V OUTC2 10 A - <Over Current Det.> CS 17 + + +INC2 - 0.2 V -INC2 (Vo) 0.3 V <OSC> CT VCC <Synchronous Cnt.> 4.2 V bias <REF> <CTL> VREF 5.0 V 18 RT 4 + 19 VREF DC/DC ON/OFF 21 CTL 20 GND DS04-27247-3E MB39A119 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Condition Power supply voltage VCC CB terminal input voltage Control input voltage Input voltage Rating Unit Min Max Unit VCC terminal 27 V VCB CB terminal 32 V VCTL CTL terminal 27 V VINE + INE1, + INE2, - INE1, - INE2, - INE3 terminal VCC + 0.3 V VINC1 + INC1, - INC1 terminal VCC + 0.3 V VINC2 + INC2, - INC2 terminal 20 V OUTD terminal output voltage VOUTD OUTD terminal 20 V ACIN input voltage VACIN ACIN terminal VCC V ACOK terminal output voltage VACOK ACOK terminal 27 V XACOK terminal output voltage VXACOK XACOK terminal 27 V CVM terminal output voltage VCVM CVM terminal 27 V Output current IOUT 60 mA Power dissipation PD 4400*1,*2 1900*1,*3 mW -55 + 125 C Storage temperature Ta +25 C TSTG *1 : The packages are mounted on the dual-sided epoxy board (10 cm x 10cm) . *2 : With connection of exposed pad and with thermal via. *3 : With connection of exposed pad and without thermal via. WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. DS04-27247-3E 5 MB39A119 RECOMMENDED OPERATING CONDITIONS Parameter Symbol Condition Power supply voltage VCC CB terminal input voltage Value Unit Min Typ Max VCC terminal 8 25 V VCB CB terminal 30 V Reference voltage output current IREF VREF terminal -1 0 mA Bias output current IVB VB terminal -1 0 mA VINE + INE1, + INE2, - INE1, - INE2, - INE3 terminal 0 5 V VINC1 + INC1, -INC1 terminal 7 VCC V VINC2 + INC2, -INC2 terminal 0 19 V Input voltage difference DVINC Current detection voltage range 0 140 mV OUTD terminal output voltage VOUTD OUTD terminal 0 19 V OUTD terminal output current IOUTD OUTD terminal 0 2 mA CTL terminal input voltage VCTL CTL terminal 0 25 V ACIN input voltage VACIN ACIN terminal 0 VCC V ACOK terminal output voltage VACOK ACOK terminal 0 25 V XACOK terminal output voltage VXACOK XACOK terminal 0 25 V CVM terminal output voltage VCVM CVM terminal 0 25 V Peak output current IOUT -1200 +1200 mA Oscillation frequency fOSC 200 500 1000 kHz Timing resistor RT RT terminal 39 k Soft-start capacitor CS CS terminal 0.22 F CB terminal capacitor CB CB terminal 0.1 F Bias output capacitor CVB VB terminal 1.0 F Reference voltage output capacitor CREF VREF terminal 0.1 1.0 F Ta -30 +25 +85 C Input voltage Operating ambient temperature Duty 5 % (t=1/fOSC x Duty) WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device's electrical characteristics are warranted when the device is operated within these ranges. Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their representatives beforehand. 6 DS04-27247-3E MB39A119 ELECTRICAL CHARACTERISTICS (VCC = 19 V, VB = 0 mA, VREF = 0 mA, Ta = +25 C) Parameter Symbol Pin No. VREF1 19 VREF2 Input stability Max Ta = +25 C 4.963 5.000 5.037 V 19 Ta = -10 C to + 85 C 4.95 5.00 5.05 V Line 19 VCC = 8 V to 25 V 1 10 mV Load stability Load 19 VREF = 0 mA to -1 mA 1 10 mV Short-circuit output current Ios 19 VREF = 1 V -60 -30 -15 mA VTLH 1 VCC 7.5 7.9 V VTHL 1 VCC 7.0 7.4 V VH 1 VCC 0.1 V VTLH 25 VB 3.8 4.0 4.2 V VTHL 25 VB 3.1 3.3 3.5 V VH 25 VB 0.7 V VTLH 19 VREF 2.5 2.7 2.9 V VTHL 19 VREF 2.3 2.5 2.7 V Hysteresis width VH 19 VREF 0.2 V Charge current ICs 17 -14 -10 -6 A Oscillation frequency fosc 27 RT = 39 k 450 500 550 kHz Frequency temperature stability f/fdt 27 Ta = -30 C to + 85 C 1* % Input offset voltage VIO 7, 8 1 5 mV Input bias current IB 7, 8 -50 -15 nA Voltage gain AV 7, 8, 14 DC 100* dB Frequency bandwidth BW 7, 8, 14 AV = 0 dB 1.2* MHz VFBH 14 2.9 3.1 V VFBL 14 0.8 0.9 V ISOURCE 14 FB123 = 2 V -60 -30 A ISINK 14 FB123 = 2 V 2.0 4.0 mA Hysteresis width Under voltage Threshold voltage lockout protection circuit block Hysteresis width [UVLO] Threshold voltage Triangular wave oscillator block [OSC] Error amplifier block [Error Amp1] Unit Typ Threshold voltage Soft-start block [SOFT] Value Min Output voltage Reference voltage block [REF] Conditions Output voltage Output source current Output sink current * : Standard design value (Continued) DS04-27247-3E 7 MB39A119 (VCC = 19 V, VB = 0 mA, VREF = 0 mA, Ta = +25 C) Parameter Min Typ Max Unit 1 5 mV Input bias current IB 12, 13 -50 -15 nA Voltage gain AV 12, 13, DC 14 100* dB Frequency bandwidth BW 12, 13, AV = 0dB 14 1.2* MHz Output voltage Output sink current Threshold voltage VFBH 14 2.9 3.1 V VFBL 14 0.8 0.9 V ISOURCE 14 FB123 = 2 V -60 -30 A ISINK 14 FB123 = 2 V 2.0 4.0 mA VTH1 14, 15 FB123 = 2 V VTH2 14, 15 FB123 = 2 V, Ta = -10 C to + 85 C 4.179 4.200 4.221 V 4.169 4.200 4.231 V Voltage gain AV 14, 15 DC 100* dB Frequency bandwidth BW 14, 15 AV = 0 dB 1.2* MHz 2.9 3.1 V Output voltage VFBH 14 VFBL 14 0.8 0.9 V ISOURCE 14 FB123 = 2 V -60 -30 A Output sink current ISINK 14 FB123 = 2 V 2.0 4.0 mA OUTD terminal leak current ILEAK 16 OUTD = 19 V 0 1 A OUTD terminal output ON resistance RON 16 OUTD = 1 mA 35 50 VOUTC1 8 + INC1 = - INC1 = 7 V to 19 V, 2.425 VIN = 100 mV 2.5 2.575 V VOUTC2 8 + INC1 = - INC1 = 7 V to 19 V, 0.425 VIN = 20 mV 0.5 0.575 V Voltage gain AV 2, 3, 8 + INC1 = - INC1 = 7 V to 19 V, 24.25 VIN = 100 mV 25 25.75 V/V Input offset voltage VIO 2, 3, 8 + INC1 = - INC1 = 7 V to 19 V -3 +3 mV IINC1 2, 3 + INC1 = - INC1 = 7 V to 19 V 20 30 A IINC2 2, 3 + INC1 = - INC1 = 7 V to 19 V, CTL = 0 V 0 1 A 3.0* MHz Output source current Current detection voltage Current detection amplifier block [Current Amp1] Value 12, 13 Output source current Error amplifier block [Error Amp3] Conditions VIO Input offset voltage Error amplifier block [Error Amp2] Symbol Pin No. Input current Frequency bandwidth Output voltage Output source current Output sink current BW 2, 3, 8 AV = 0 dB VOUTCH 8 3.7 4.0 V VOUTCL 8 0.04 0.2 V ISOURCE 8 -INE1 = 2 V -1.2 -0.6 mA ISINK 8 -INE1 = 2 V 100 200 A * : Standard design value (Continued) 8 DS04-27247-3E MB39A119 (VCC = 19 V, VB = 0 mA, VREF = 0 mA, Ta = +25 C) Parameter Value Min Typ Max Unit 9 + INC2 = - INC2 = 3 V to 19 V, VIN = 100 mV 2.38 2.48 2.58 V VOUTC2 9 + INC2 = - INC2 = 3 V to 19 V, VIN = 20 mV 0.44 0.52 0.60 V VOUTC3 9 + INC2 = - INC2 = 0 V to 3 V, VIN = 100 mV 2.24 2.45 2.66 V VOUTC4 9 + INC2 = - INC2 = 0 V to 3 V, VIN = 20 mV 0.30 0.5 0.70 V Voltage gain AV 9, 10, 11 + INC2 = - INC2 = 3 V to 19 V, 23.76 VIN = 100 mV 24.5 25.24 V/V Input offset voltage VIO 9, 10, 11 + INC2 = - INC2 = 3 V to 19 V -1.5 +1.5 +4.5 mV Input current Frequency bandwidth Output voltage Output source current Output sink current PWM comparator block [PWM Comp.] Threshold voltage Output block [Drv-1, 2] Output ON resistance Under input voltage detection comparator block [UV Comp.] Conditions VOUTC1 Current detection voltage Current detection amplifier block [Current Amp2] Symbol Pin No. Threshold voltage Hysteresis width I+INCH 10 + INC2 = - INC2 = 3 V to 19 V, VIN = 100 mV 30 45 A I-INCH 11 + INC2 = - INC2 = 3 V to 19 V, VIN = 100 mV 0.1* A IINCL 10, 11 -300 -200 A 3.0* MHz BW + INC2 = - INC2 = 0 V 9, 10, 11 AV = 0 dB VOUTCH 9 3.9 4.2 V VOUTCL 9 0.04 0.2 V ISOURCE 9 OUTC2 = 2 V -1.2 -0.6 mA ISINK 9 OUTC2 = 2 V 100 200 A VTL 14 Duty cycle = 0% 1.5 V VTH 14 Duty cycle = 100% 2.5 V ROH 24, 27 OUT-1, OUT-2 = -100 mA 4 7 ROL 24, 27 OUT-1, OUT-2 = 100 mA 1 3.5 VTLH 11 -INC2 = 12.6 V 12.6 12.8 13.0 V VTHL 11 -INC2 = 12.6 V 12.5 12.7 12.9 V VH 11 0.1 V * : Standard design value (Continued) DS04-27247-3E 9 MB39A119 (Continued) (VCC = 19 V, VB = 0 mA, VREF = 0 mA, Ta = +25 C) Parameter Overcurrent detection block [Over Current Det.] Threshold voltage Max 12.75 12.8 12.85 V 2.056 2.12 2.184 V VTHL 4 1.959 2.02 2.081 V VH 4 0.1 V ACOK terminal output leak current ILEAK 5 ACOK = 25 V 0 1 A ACOK terminal output ON resistance RON 5 ACOK = 1 mA 200 400 XACOK terminal output leak current ILEAK 22 XACOK = 25 V 0 1 A XACOK terminal output ON resistance RON 22 XACOK = 1 mA 200 400 VTLH 14 2.7* V VTHL 14 2.6* V VH 14 0.1* V CVM terminal output leak current ILEAK 6 CVM = 25 V 0 1 A CVM terminal output ON resistance RON 6 CVM = 1 mA 200 400 VTLH 17 2.55 2.6 2.65 V VTHL 17 2.50 2.55 2.60 V VH 17 0.05 V VTLH 9 0.35 0.4 0.45 V VTHL 9 0.25 0.3 0.35 V Hysteresis width VH 9 0.1 V Output voltage VB 25 4.9 5.0 5.1 V Load stability Load 25 VB = 0 mA to - 10 mA 10 50 mV CTL input voltage VON 21 IC operating state 2 25 V VOFF 21 IC standby state 0 0.8 V ICTLH 21 CTL = 5 V 25 40 A ICTLL 21 CTL = 0 V 0 1 A Standby current ICCS 1 CTL = 0 V 0 10 A Power supply current ICC 1 CTL = 5 V 1.9 2.9 mA Threshold voltage Hysteresis width Input current General Typ 4 Synchronous rectification Hysteresis width control block [Synchronous Light load detection threshold voltage Cnt.] Control block [CTL] Unit Min VTLH CS threshold voltage Bias voltage block [VB] -INC2 = 12.6 V Value 11 Hysteresis width Constant voltage control state detection block [CV Comp.] Conditions VTLH Threshold voltage AC adapter voltage detection block [AC Comp.] Symbol Pin No. * : Standard design value 10 DS04-27247-3E MB39A119 TYPICAL CHARACTERISTICS Power supply current ICC (mA) Power Supply Current vs. Power Supply Voltage Reference Voltage vs. Power Supply Voltage Reference voltage VREF (V) 6 5 4 3 2 Ta = +25 C CTL = 5 V 1 0 0 5 10 15 20 25 6 5 4 3 2 Ta = +25 C CTL = 5 V VREF = 0 mA 1 0 0 5 Power supply voltage VCC (V) Reference voltage VREF (V) Reference voltage VREF (V) 3 2 1 0 5 10 15 20 30 25 35 5.04 5.02 5.00 4.98 4.96 4.94 4.92 -40 700 9 8 7 600 6 VREF 500 5 400 4 300 3 ICTL 200 2 100 1 0 0 25 0 5 10 15 20 CTL terminal voltage VCTL (V) Error amplifier threshold voltage VTH (V) 800 10 Reference voltage VREF (V) CTL terminal current ICTL (A) Ta = +25 C VCC = 19 V VREF = 0 mA -20 0 20 40 60 80 100 Error Amplifier Threshold Voltage vs. Operating Ambient Temperature CTL Terminal Current, Reference Voltage vs. CTL Terminal Voltage 900 VCC = 19 V CTL = 5 V 5.06 Operating ambient temperature Ta ( C) Load current IREF (mA) 1000 25 5.08 4 0 20 Reference Voltage vs. Operating Ambient Temperature Ta = +25 C VCC = 19 V CTL = 5 V 5 15 Power supply voltage VCC (V) Reference Voltage vs. Load Current 6 10 4.25 VCC = 19 V CTL = 5 V 4.24 4.23 4.22 4.21 4.20 4.19 4.18 4.17 4.16 4.15 -40 -20 0 20 40 60 80 100 Operating ambient temperature Ta ( C) (Continued) DS04-27247-3E 11 Triangular Wave Oscillation Frequency vs. Operating Ambient Temperature Triangular Wave Oscillation Frequency vs. Timing Resistor 580 10000 Triangular wave oscillation frequency fOSC (kHz) Triangular wave oscillation frequency fOSC (kHz) MB39A119 VCC = 19 V CTL = 5 V RT = 39 k 560 540 520 500 480 460 440 420 -40 -20 0 20 40 60 80 100 Ta = +25 C VCC = 15 V CTL = 5 V 1000 100 10 1 Operating ambient temperature Ta ( C) 100 1000 Timing Resistor RT (k) 50 40 30 20 10 0 -10 -20 -30 -40 -50 100 225 180 135 90 45 0 -45 -90 -135 -180 -225 10M VCC = 19 V Ta = +25 C Av 1k 10k 100k 1M Phase (degree) Gain AV (dB) Error Amplifier Gain, Phase vs. Frequency (ERR1, 2) 4.2 V 240 k 10 k 10 k IN 1 F 2.4 k + 10 k 8 (13) 7 (12) - OUT 14 + 10 k Error Amp1 (Error Amp2) Frequency f (Hz) 50 40 30 20 10 0 -10 -20 -30 -40 -50 100 225 180 135 90 45 0 -45 -90 -135 -180 -225 10M VCC = 19 V Ta = +25 C Av 1k 10k 100k 1M Phase (degree) Gain AV (dB) Error Amplifier Gain, Phase vs. Frequency (ERR3) 240 k 10 k IN 1 F 2.4 k + 15 - + 10 k OUT 14 4.2 V Error Amp3 Frequency f (Hz) (Continued) 12 DS04-27247-3E MB39A119 (Continued) Current Detection Amplifier Gain, Phase vs. Frequency 225 50.0 180 135 90 45 0 -45 -90 -135 -180 -225 10M Av 1k 100k 10k 1M Phase (degree) Gain AV (dB) 40.0 30.0 20.0 10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 Ta = +25 C VCC = 19 V +INC1 -INC1 3 2 + x 25 - -INE1 8 OUT Current Amp1 19 V 18.95 V Frequency f (Hz) Current Detection Amplifier Gain, Phase vs. Frequency 225 Ta = +25 C 180 135 90 45 0 -45 -90 -135 -180 -225 10M Av 1k 100k 10k 1M VCC = 19 V Phase (degree) Gain AV (dB) 50.0 40.0 30.0 20.0 10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 +INC2 10 -INC2 11 + x 24.5 - OUTC2 9 OUT Current Amp2 12.6 V 12.55 V Frequency f (Hz) Power Dissipation vs. Operating Ambient Temperature Power dissipation PD (mW) 5000 QFN-24 (with thermal via) 4500 4400 4000 3500 3000 QFN-24 (without thermal via) 2500 2000 1900 1500 1000 500 0 -50 -25 0 25 50 75 100 125 Operating ambient temperature Ta ( C) DS04-27247-3E 13 MB39A119 FUNCTION DESCRIPTION 1. DC/DC Converter Block (1) Reference voltage block (REF) The reference voltage circuit uses the voltage supplied from the VCC terminal (pin 1) to generate a temperature compensated, stable voltage (5.0 V Typ) used as the reference power supply voltage for the IC's internal circuitry. This block can also be used to obtain a load current to a maximum of 1 mA from the reference voltage VREF terminal (pin 19) . (2) Triangular wave oscillator block (OSC) The triangular wave oscillator block has built-in capacitor for frequency setting and generates the triangular wave oscillation waveform by connecting the triangular wave oscillation frequency setting resistor with the RT terminal (pin 17) . The triangular wave is input to the PWM comparator circuits on the IC. (3) Error amplifier block (Error Amp1) This amplifier detects the output signal from the current detection amplifier (Current Amp1) , compares this to the +INE1 terminal (pin 7) , and outputs a PWM control signal to be used in controlling the charge current. In addition, an arbitrary loop gain can be set up by connecting a feedback resistor and capacitor between the FB123 terminal (pin 14) and -INE1 terminal (pin 8) , providing stable phase compensation to the system. (4) Error amplifier block (Error Amp2) This amplifier detects the output signal from the current detection amplifier (Current Amp2) , compares this to the +INE2 terminal (pin 12) , and outputs a PWM control signal to be used in controlling the charge current. In addition, an arbitrary loop gain can be set up by connecting a feedback resistor and capacitor between the FB123 terminal (pin 14) and -INE2 terminal (pin 13) , providing stable phase compensation to the system. (5) Error amplifier block (Error Amp3) This error amplifier (Error Amp3) detects the output voltage from the DC/DC converter and outputs the PWM control signal. External output voltage setting resistors can be connected to the error amplifier inverted input terminal to set the desired level of output voltage from 1 cell to 4 cells. In addition, an arbitrary loop gain can be set by connecting a feedback resistor and capacitor from the FB123 terminal (pin 14) to the -INE3 terminal (pin 15) of the error amplifier, enabling stable phase compensation to the system. (6) Current detection amplifier block (Current Amp1) The current detection amplifier (Current Amp1) detects a voltage drop which occurs between both ends of the output sense resistor (RS2) due to the flow of the AC adapter current, using the +INC1 terminal (pin 3) and -INC1 terminal (pin 2) . The AC adapter current control signal is amplified to 25 times and output to the inverse input terminal of Error Amp1 through the internal 100 k. This amplifier cannot use for detecting the charge current. (7) Current detection amplifier block (Current Amp2) The current detection amplifier (Current Amp2) detects a voltage drop which occurs between both ends of the output sense resistor (RS1) due to the flow of the charge current, using the +INC2 terminal (pin 10) and -INC2 terminal (pin 11) . The signal amplified to 24.5 times is output to the OUTC2 terminal (pin 9) . (8) PWM comparator block (PWM Comp.) The PWM comparator circuit is a voltage-pulse width converter for controlling the output duty of the error amplifiers (Error Amp1 to Error Amp3) depending on their output voltage. The PWM comparator circuit compares with either of low voltages between the triangular wave voltage generated by the triangular wave oscillator and the error amplifier output voltage, turns on the main side output transistor 14 DS04-27247-3E MB39A119 and turns off on the synchronous rectification side output transistor, during the interval in which the triangular wave voltage is lower than the error amplifier output voltage. (9) Output block (Drv-1, 2) The output circuit uses a CMOS configuration capable of driving an external N-ch MOS FET both main side and synchronous rectification side. (10) Control block (CTL) Setting the CTL terminal (pin 21) "L" level places in the standby mode. CTL function table CTL Power OUTD L OFF (Standby) Hi-Z H ON (Active) L (11) Bias voltage block (VB) Bias voltage block outputs 5 V (Typ) for the power supply of the output circuit and for setting the bootstrap voltage. (12) Off time control block (Off time Control) When MB39A119 operates by high on-duty, voltage difference of both ends of boot strap capacitor CB is decreasing gradually. In such the case, off time control block charges with CB by compulsorily generating off time (0.3 s Typ) . (13) Overcurrent detection block (Over Current Det.) Overcurrent detection block detects the 0.2 V (Typ) or more potential difference between +INC2 terminal (pin 10) and -INC2 terminal (pin 11) . When excessive current flows to the charge direction due to load-sudden change, it determines the overcurrent, makes CS terminal (pin 17) "L" level, and makes the on duty 0 %. After finishing the overcurrent, MB39A119 restarts with the soft-start operation. (14) Synchronous rectification control block (Synchronous Cnt.) CS terminal (pin 17) and 2.6 V (Typ) are compared. Output OUT-2 terminal (pin 24) for synchronous rectification side FET drive in the soft-start is fixed at "L" level. Output OUTC2 terminal of current detection amplifier block (Current Amp2) (pin 9) and 0.3 V (Typ) are compared, and output OUT-2 terminal (pin 24) for synchronous rectification side FET drive is fixed at "L" level at light-load. DS04-27247-3E 15 MB39A119 2. Protection Function (1) Under voltage lockout protection circuit block (VREF-UVLO) A momentary decrease in internal reference voltage (VREF) may cause malfunctions in the control IC, resulting in breakdown or degradation of the system. To prevent such malfunction, the under voltage lockout protection circuit detects internal reference voltage drop and fixes the OUT-1 terminal (pin 27) and the OUT-2 terminal (pin 24) to the "L" level. The system restores voltage supply when the internal reference voltage reaches the threshold voltage of the under voltage lockout protection circuit. Protection circuit (VREF-UVLO) operation function table When UVLO is operating (VREF voltage is lower than UVLO threshold voltage) , the logic of the following terminal is fixed. OUTD OUT-1 OUT-2 CS VB Hi-Z L L L L (2) Under voltage lockout protection circuit block (VCC-UVLO, VB-UVLO) The transient state or a momentary decrease in power supply voltage, which occurs when the bias voltage (VB) for output circuit is turned on, may cause malfunctions in the control IC, resulting in breakdown or degradation of the system. To prevent such malfunction, the under voltage lockout protection circuit detects a bias voltage drop and fixes the OUT-1 terminal (pin 27) and the OUT-2 terminal (pin 24) to the "L" level. The system restores voltage supply when the power supply voltage or internal reference voltage reaches the threshold voltage of the under voltage lockout protection circuit. Protection circuit (VCC-UVLO, VB-UVLO) operation function table When UVLO is operating (VCC voltage or VB voltage is lower than UVLO threshold voltage) , the logic of the following terminal is fixed. OUT-1 OUT-2 CS L L L (3) Under input voltage detection comparator block (UV Comp.) VCC terminal (pin 1) voltage and -INC2 terminal (pin 11) voltage are compared, and VCC voltage is lower than the battery voltage +0.1 V (Typ) and fixes the OUT-1 terminal (pin 27) and OUT-2 terminal (pin 24) to the "L" level. The system restores voltage supply when the input voltage reaches the threshold voltage of the under input voltage detection comparator. Protection circuit (UV Comp.) operation function table When under input voltage is detected (Input voltage is lower than UV Comp. threshold voltage) , the logic of the following terminal is fixed. OUT-1 OUT-2 CS L 16 L L DS04-27247-3E MB39A119 3. Detection Functions (1) AC adapter voltage detection block (AC Comp.) When ACIN terminal (pin 4) voltage is lower than 2.0 V (Typ) , AC adapter voltage detection block (AC Comp.) outputs "Hi-Z" level to the ACOK terminal (pin 5) and outputs "L" level to the XACOK terminal (pin 22) . When CTL terminal (pin 21) is set to "L" level, ACOK terminal (pin 5) and XACOK terminal (pin 22) are fixed to "Hi-Z" level. AC adapter detection function table The logic of the following terminal is fixed according to the connection state of the AC adapter. ACIN ACOK XACOK H L Hi-Z L Hi-Z L (2) Constant voltage control state detection block (CV Comp.) When CV Comp. detects that the FB123 terminal (pin 14) voltage of the error amplifier (Error Amp3) output terminal becomes 2.6 V (Typ) or less, "L" level is output to constant voltage control state detection block output terminal CVM terminal (pin 6) . Charge control state function table Error Amp3 output (FB123) CVM Status > 2.6 V Hi-Z Constant current control 2.6 V L Constant voltage control DS04-27247-3E 17 MB39A119 CONSTANT CHARGING VOLTAGE AND CURRENT OPERATION The MB39A119 is DC/DC converter IC with the pulse width modulation method (PWM method) . In the output voltage control loop, the output voltage of the DC/DC converter is detected, and the Error Amp3 compares internal reference voltage 4.2 V and DC/DC converter output to output the PWM controlled signal. In the charging current control loop, the voltage drop generated at both ends of charging current sense resistor (RS1) is sensed by +INC2 terminal (pin 10) , -INC2 terminal (pin 11) of Current Amp2, and the signal is output to OUTC2 terminal (pin 9) , which is amplified by 24.5 times. Error Amp2 compares the OUTC2 terminal (pin 9) voltage, which is the output of Current Amp2, and +INE2 terminal (pin 12) to output the PWM control signal, and it regulates the charging current. In AC adapter current control loop, the voltage drop generated at both ends of AC adapter current sense resistor (RS2) is sensed by +INC1 terminal (pin 3) , -INC1 terminal (pin 2) of Current Amp1, and the signal is output to -INE1 terminal (pin 8) , which is amplified by 25 times. Error Amp1 compares -INE1 terminal (pin 8) voltage, which is output of Current Amp1, and +INE1 terminal (pin 7) to output PWM controlled signal, and it limits the charging current due to the AC adapter current not to exceed the setting value. The PWM comparator compares the triangular wave to the smallest terminal voltage among the Error Amplifier output voltage (Error Amp1 to Error Amp3) . And the triangular wave voltage generated by the triangular wave oscillator. When the triangular wave voltage is smaller than the error amplifier output voltage, the main side output transistor is turned on and the synchronous rectification side output transistor is turned off. 18 DS04-27247-3E MB39A119 SETTING THE CHARGE VOLTAGE The charge voltage (DC/DC output voltage) can be set by connecting external output voltage setting resistors (R1 and R2) to the -INE3 terminal (pin 15) . Be sure to select a resistor value that allows you to ignore the onresistance (35 at 1 mA) of internal FET connected to the OUTD terminal (pin 16). Battery charge voltage : VO VO (V) = R1 + R2 x - INE3 (V) R2 B VO R1 <Error Amp3> -INE3 - 15 + R2 4.2 V 16 OUTD SETTING THE CHARGE CURRENT The charge current value can be set at the analog voltage value of the +INE2 terminal (pin 12) . Charge current formula : Ichg (A) = + INE2 (V) 24.5 x RS1 () Battery charge current setting voltage : + INE2 + INE2 (V) = 24.5 x Ichg (A) x RS1 () It is recommended that the filter should be connected to an input terminal of Current Amp2 as shown below in order to reduce the switching noise and increase the charge current accuracy. Ichg RS1 10 10 0.22 F 0.22 F +INC2 -INC2 DS04-27247-3E <Current Amp2> 10 11 + x 24.5 - 19 MB39A119 SETTING THE INPUT CURRENT The input limit current value can be set at the analog voltage value of the +INE1 terminal (pin 7) . Input current formula : IIN (A) = + INE1 (V) 25 x RS2 () Input current setting voltage : + INE1 + INE1 (V) = 25 x IIN (A) x RS2 () SETTING THE OVERCURRENT DETECTION VALUE The overcurrent is detected when the voltage difference is more than 0.2 V (Typ) between +INE2 terminal (pin 10) voltage and -INE2 terminal (pin 11) voltage. Charge overcurrent detection value : Iocdet (A) = 0.2 (V) RS1 () Charge current and overcurrent detection value by RS1 value (example) +INE2 Ichg RS1 OCDet 33 m 0.5 V to 3.5 V 0.6 A to 4.2 A 6A 15 m 0.5 V to 3.5 V 1.3 A to 9.3 A 13 A SETTING THE TRIANGULAR WAVE OSCILLATION FREQUENCY The triangular wave oscillation frequency can be set by the timing resistor (RT) connected to the RT terminal (pin 18) . Triangular wave oscillation frequency : fOSC 19500 fosc (kHz) =: RT (k) 20 DS04-27247-3E MB39A119 SETTING THE SOFT-START TIME To prevent rush current at start-up of IC, the soft-start time can be set by connecting soft-start capacitor (CS) to the CS terminal (pin 17) . When the CTL terminal (pin 21) is set to "H" level and IC is started (VCC UVLO threshold voltage) , external soft-start capacitor (CS) connected to the CS terminal (pin 17) is charged at 10 A. ON duty depends PWN comparator output, which compares the FB123 terminal (pin 14) voltage and the triangular wave oscillator output voltage. During soft-start, FB123 terminal (pin14) voltage increases with sum voltage of CS terminal (pin 17) and diode voltage. Therefore, the output voltage of the DC/DC converter and current increase can be set by output ON duty in proportion to rise of the CS terminal (pin 17) voltage. The ON duty is affected by the ramp voltage of FB123 terminal (pin 14) until an output voltage of one Error Amp reaches the DC/DC converter loop controlled voltage. Soft-start time is obtained from the following formula. : Soft-start time : tS (time to output on duty 80 %) ts (s) =: 0.13 x CS (F) * Soft-start timing chart CS CT FB123 CS FB123 CT 0v OUT-1 OUT-1 0v VO Error Amp3 threshold voltage VO 0v IO IO 0A DS04-27247-3E 21 MB39A119 TRANSIENT RESPONSE AT LOAD-STEP The constant voltage control loop and the constant current control loop are independent. With the load-step, these two control loops change. The battery voltage and current overshoot are generated by the delay time of the control loop when the mode changes. The delay time is determined by phase compensation constant. When the battery is removed if the charge control is switched from the constant current control to the constant voltage control, and the charging voltage does overshoot by generating the period controlled with high duty by output setting voltage. The excessive voltage is not applied to the battery because the battery is not connected. When the battery is connected if the charge control is switched from the constant voltage control to the constant current control, and the charging current does overshoot by generating the period controlled with high duty by output setting voltage. The battery pack manufacturer in Japan thinks not the problem the current overshoot of 10ms or less. * Operation at step-load Error Amp3 Output Error Amp2 Output Constant Current Battery Voltage Battery Current 22 Error Amp2 Output Error Amp3 Output Constant Voltage When charge control switches from the constant current control to the constant voltage control, the voltage does overshoot by generating the period controlled with high duty by output setting voltage. Constant Current The battery pack manufacturer in Japan thinks not the problem the current overshoot of 10ms or less. DS04-27247-3E MB39A119 AC ADAPTER DETECTION FUNCTION When ACIN terminal (pin 4) voltage is lower than 2.0 V (Typ) , AC adapter voltage detection block (AC Comp.) outputs "Hi-Z" level to the ACOK terminal (pin 5) and outputs "L" level to the XACOK terminal (pin 22) . When CTL terminal (pin 21) is set to "L" level, ACOK terminal (pin 5) and XACOK terminal (pin 22) are fixed to "Hi-Z" level. (1) AC adapter presence The presence of AC adapter can be easily detected because the signal is output from the ACOK terminal (pin 5) to microcomputer etc. In this case, if CTL terminal (pin 21) is set in "L" level, IC become the standby state (ICC = 0 A Typ) . * Connection example of detecting AC adapter presence Micon AC adapter ACIN ACOK 5 4 XACOK 22 <AC Comp.> + - DS04-27247-3E 23 MB39A119 (2) Automatic changing system power supply between AC adapter and battery The AC adapter voltage is detected, and the external switch at input side and battery side is changed automatically with the connection as follows. Connect CTL terminal (pin 21) to VCC terminal (pin 1) for this function. OFF duty cycle becomes 100 % when CS terminal (pin 17) voltage is made to be 0 V, if it is needed after full charge. * Connection example of automatic changing system power supply between AC adapter and battery System AC adapter ACIN ACOK 4 5 Battery XACOK 22 <AC Comp.> + - VCC 1 CTL 21 <SOFT> VREF 10 A CS 17 Micon Micon (3) Battery selector function When control signal from microcomputer etc. is input to ACIN terminal (pin 4) below, ACOK terminal (pin 5) output voltage and XACOK terminal (pin 22) output voltage are controlled to select one of the two batteries for charge. Connect CTL terminal (pin 21) to VCC terminal (pin 1) for this function. OFF duty cycle becomes 100 % when CS terminal (pin 17) voltage is made to be 0 V, if it is needed after full charge. * Connection example of battery selector function System AC adapter 4 ACIN <AC Comp.> + - VCC CTL 1 21 5 ACOK 22 XACOK A B Ichg RS1 Battery1 Battery2 <SOFT> VREF 10 A Micon 24 CS 17 DS04-27247-3E MB39A119 PHASE COMPENSATION Circuit example of phase compensation is shown below. * Circuit example of phase compensation VIN RS2 15 m VCC -INE3 <Error Amp3> <PWM Comp.> - + + Cc <OUT> OUT Drive - Lo l1 RL VBATT RS1 33 m 4.2 V -2.5 V Rc Co Rin1 ESR Rin2 VH -1.5 V FB123 Ro (VCC-6V) VH Bias Voltage OSC Lo : Inductance RL : Equivalent series resistance of inductance Co : Capacity of condenser ESR : Equivalent series resistance of condenser Ro : Load resistance * Method to obtain frequency characteristic of LC filter 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 1 Cut-off frequency 180 160 gain phase 140 120 Gain Phase 10 100 1k 10k 100k 1M 100 80 60 40 20 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 1 f1 (Hz) = 2 Phase [deg] Gain [dB] Frequency characteristic of power output LC filter (DC gain is included.) Lo x Co x (Ro + ESR) (Ro + RL) Lo = 15 H Co = 14.1 F Ro = 4.2 RL = 30 m ESR = 100 m 10M Frequency [Hz] DS04-27247-3E 25 MB39A119 * Method to obtain frequency characteristic of Error Amp total gain AMP Open Loop Gain total phase Gain Phase 1 10 100 1k 10k 100k 180 160 140 120 100 80 60 40 20 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 Cut-off frequency f2 (Hz) = Phase [deg] Gain [dB] Total frequency characteristic 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 1 2 x Rc x Cc Rc = 150 k Cc = 3300 pF 1M Frequency [Hz] * Method to obtain frequency characteristic of DC/DC converter total gain AMP Open Loop Gain total phase Gain Phase 1 10 100 1k 10k 100k 180 160 140 120 100 80 60 40 20 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 Phase [deg] Gain [dB] Total frequency characteristic 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 1M The overview of frequency characteristic for DC/DC converter can be obtained in combination between LC filter and frequency characteristic of Error Amp as mentioned above. Note the following point in order to stabilize frequency characteristic of DC/DC converter. Cut-off frequency of DC/DC converter should be set to half or less of the triangular wave oscillator frequency. Frequency [Hz] Triangular wave oscillation frequency. Note1) Review frequency characteristic of Error Amp when LC filter constant is changed. Note2) When the ceramic capacitor is used as smoothing capacitor CO, phase margin is reduced because ESR of the ceramic capacitor is extremely small as frequency characteristic of LC filter at low ESR. Therefore, change phase compensation of Error Amp or create resistance equivalent to ESR using pattern. * Method to obtain frequency characteristic of LC filter at low ESR 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 1 gain phase Gain Phase 10 100 1k 10k 100k 1M 180 160 140 120 100 80 60 40 20 0 -20 -40 -60 -80 -100 -120 -140 -160 -180 Cut-off frequency 1 f1 (Hz) = 2 Phase [deg] Gain [dB] Frequency characteristic of power output LC filter (DC gain is included.) Lo x Co x (Ro + ESR) (Ro + RL) Lo = 15 H Co = 14.1 F Ro = 4.2 RL = 30 m ESR = 100 m 10M Frequency [Hz] 26 DS04-27247-3E MB39A119 * Additional ESR * 3Pole2Zero DC/DC output - + DS04-27247-3E Board Pattern or connected resistor 27 MB39A119 PROCESSING WITHOUT USING OF THE CURRENT AMP1 AND AMP2 When Current Amp is not used, connect +INC1 terminal (pin 3) and -INC1 terminal (pin 2) to VCC terminal (pin 1) , connect +INC2 terminal (pin 10) and -INC2 terminal (pin 11) to VREF terminal (pin 19) , and then leave OUTC2 terminal (pin 9) open. * Connection when Current Amp is not used "Open" 2 -INC1 +INC1 3 11 -INC2 +INC2 10 1 VCC 19 VREF 9 OUTC2 PROCESSING WITHOUT USING OF THE ERROR AMP1 AND AMP2 When Error Amp1 and Amp2 are not used, connect -INE1 terminal (pin 8) and -INE2 terminal (pin 13) to GND (pin 20) , and connect +INE1 terminal (pin 7) and +INE2 terminal (pin 12) to VREF terminal (pin 19) . * Connection when Error Amp is not used 7 +INE1 GND 20 12 +INE2 8 -INE1 13 -INE2 19 VREF 28 DS04-27247-3E MB39A119 PROCESSING WITHOUT USING OF THE CS TERMINAL When soft-start function is not used, leave the CS terminal (pin 17) open. * Connection when no soft-start time is specified "Open" CS DS04-27247-3E 17 29 MB39A119 I/O EQUIVALENT CIRCUIT * Control block * Reference voltage block VCC 1 CTL 21 1.25 V + - 132.4 k 19 VREF 124.53 k ESD protection element 41.47 k 204 k ESD protection element GND 20 GND * Soft-start block * Bias voltage block VCC VCC VREF (5.0 V) 25 VB 200 k 2.5 V 17 CS 200 k GND GND * Error amplifier block (Error Amp1) * Triangular wave oscillator block VCC VCC VREF (5.0 V) 1.08 V (3.1 V) CS + - -INE1 8 14 FB123 18 RT 1M GND GND 7 +INE1 * Error amplifier block (Error Amp3) * Error amplifier block (Error Amp2) VCC VCC (3.1 V) (3.1 V) -INE2 13 FB123 -INE3 15 4.2 V FB123 GND GND 12 +INE2 (Continued) 30 DS04-27247-3E MB39A119 (Continued) * Current detection amplifier block (Current Amp1) * Current detection amplifier block (Current Amp2) VCC VCC VREF VREF +INC1 3 100 k +INC2 10 -INE1 9 OUTC2 80 k 80 k 20 k 20 k GND GND 2 -INC1 * PWM comparator block 11 -INC2 * Output block (synchronous rectification side) * Output block (Main side) VB 28 CB VREF * Invalidity current prevention block 16 OUTD 27 OUT-1 24 OUT-2 26 VS 23 PGND FB123 CTL GND GND GND * Constant voltage control state detection block VREF (5.0 V) FB123 GND DS04-27247-3E GND * AC adapter voltage detection block VREF (5.0 V) 6 CVM ACIN 4 5 ACOK 22 XACOK GND 31 MB39A119 APPLICATION EXAMPLE R6 Q2-1 51k Q2-2 RS2 System C21 0.1F 15m R39 16k R40 75k R15 24k Q5 ACIN 4 ACOK 5 6 22 <AC Comp.> -INC1 2 0.1V <UV Comp.> + x25 - + - 3.1V A B -INE1 8 +INE1 7 C11 6800pF R20 R17 20k 10k -INE2 13 R32 100k OUTC2 9 C18 1500pF R51 R33 10 10k +INC2 10 C22 0.22F -INC2 11 R25 R26 R52 +INE2 12 10 9.1k15k C23 0.22F 14 FB123 <Error Amp1> R21 24k - + + - Drv-1 VS R28 R27 R24 2k 16k 47k R18 33k C12 330pF SW3 OFF ON ON SW4 OFF OFF ON lchg 4A 2A 0.4A R10 100k OUTD C1 4.7F 23 C3 C4 C5 4.7F 4.7F 4.7F Battery PGND Output voltage (Battery voltage) is adjustable. <UVLO> <Error Amp3> - + 15 16 VREF UVLO + - 2.6V <Over Current Det.> 17 VCC UVLO VB UVLO Slope Control 4.2V 10A C9 0.22F Q1-2 D1 C2 4.7F H: ULVO,UV release <SOFT> VREF CS VO 15 OUT-2 SW4 SW3 C13 22pF C14 22pF R8 300k -INE3 lchg 5.2H RS1 33m R2 24 Off time Control - + L1 Q1-1 27 26 Drv-2 B A C6 0.1F OUT-1 <PWM Comp.> <Error Amp2> D4 28 -1.5 V + x24.5 - C7 VB 1.0F 25 CB -2.5 V <Current Amp2> 5.0V VB Reg. -INC2 (VO) 100k 8V ~ 25V C8 0.1F 2.6V <Current Amp1> 3 1 - + 2.0V +INC1 R46 56k VCC <CV Comp.> + - Hi Side only R34 100k CVM XACOK Drive Logic R41 16k VIN R45 100k + - 0.2V OUTC2 + - 0.3V <Sync Cnt.> VCC +INC2 -INC2 (VO) <OSC> CT 4.2V bias <REF> <CTL> VREF 5.0V R19 39k VREF 21 CTL 20 19 18 RT DC/DC ON/OFF GND C10 0.1F 32 DS04-27247-3E MB39A119 PARTS LIST Component M1 Q1-1, Q1-2 Q2-1, Q2-2 Q5 D1 D4 L1 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C18 C21 C22 C23 RS1 RS2 R2 R6 R8 R10 R15 R17 R18 R19 R20 R21 R24 R25 R26 R27 Item IC N-ch FET P-ch FET P-ch FET Diode Diode Inductor Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Ceramic condenser Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Specification MB39A119 VDS = - 30 V, ID = 8 A (Max) VDS = - 30 V, ID = 8 A (Max) VDS = - 30 V, ID = 6 A (Max) VF = 0.35 V (Max) at IF = 0.5 A VF = 0.4 V (Max) at IF = 0.3 A 5.2 H, 22 m, 5.5 A 4.7 F (25 V) 4.7 F (25 V) 4.7 F (25 V) 4.7 F (25 V) 4.7 F (25 V) 0.1 F (50 V) 1.0 F (25 V) 0.1 F (50 V) 0.22 F (25 V) 0.1 F (50 V) 6800 pF (50 V) 330 pF (50 V) 22 pF (50 V) 22 pF (50 V) 1500 pF (50 V) 0.1 F (50 V) 0.22 F (25 V) 0.22 F (25 V) 33 m 15 m 15 51 k 300 k 100 k 24 k 10 k 33 k 39 k 20 k 24 k 47 k 9.1 k 15 k 16 k Vendor Fujitsu NEC NEC TOSHIBA ROHM SANYO SUMIDA TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK TDK KOA KOA ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm Package QFN-28P SO-8 SO-8 SO-8 TUMD2 1197A SMD 3216 3216 3216 3216 3216 1608 3216 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 SL1 SL1 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 Parts No. MB39A119QN-G PA2752 PA1772 TPC8102 RSX051VA-30 SBS006 CDRH104R-5R2 C3216JB1E475K C3216JB1E475K C3216JB1E475K C3216JB1E475K C3216JB1E475K C1608JB1H104K C3216JB1E105K C1608JB1H104K C1608JB1E224K C1608JB1H104K C1608JB1H682K C1608CH1H331J C1608CH1H220J C1608CH1H220J C1608CH1H152J C1608JB1H104K C1608JB1E224K C1608JB1E224K SL1TTE33L0D SL1TTE15L0D RR0816P150D RR0816P513D RR0816P304D RR0816P104D RR0816P243D RR0816P103D RR0816P333D RR0816P393D RR0816P203D RR0816P243D RR0816P473D RR0816P912D RR0816P153D RR0816P163D (Continued) DS04-27247-3E 33 MB39A119 (Continued) Component R28 R32 R33 R34 R39 R40 R41 R45 R46 R51 R52 Item Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Specification 2 k 100 k 10 k 100 k 16 k 75 k 16 k 100 k 56 k 10 10 Vendor ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm ssm Package 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 1608 Parts No. RR0816P202D RR0816P104D RR0816P103D RR0816P104D RR0816P163D RR0816P753D RR0816P163D RR0816P104D RR0816P563D RR0816P100D RR0816P100D Note : NEC : NEC corporation TOSHIBA : TOSHIBA CORPORATION ROHM : ROHM CO., LTD. SUMIDA : Sumida Corporation TDK : TDK Corporation KOA : KOA Corporation ssm : SUSUMU CO., LTD. SANYO : SANYO Electric Co., Ltd. 34 DS04-27247-3E MB39A119 SELECTION OF COMPONENTS * N-ch MOS FET The N-ch MOS FET for switching use should be rated for at least +20% more than the input voltage. To minimize continuity loss, use a FET with low RDS (ON) between the drain and source. For high input voltage and high frequency operation, on-cycle switching loss will be higher so that power dissipation must be considered. In this application, the NEC PA2752 is used. Continuity loss, on/off switching loss and total loss are determined by the following formulas. The selection must ensure that peak drain current does not exceed rated values. Continuity loss : Pc PC = ID2 x RDS (ON) x Duty On-cycle switching loss : PS (ON) PS (ON) = VD (Max) x ID x tr x fosc 6 Off-cycle switching loss : PS (OFF) PS (OFF) = VD (Max) x ID (Max) x tf x fosc 6 Total loss : PT PT = PC + PS (ON) + PS (OFF) * Inductor In selecting inductors, it is of course essential not to apply more current than the rated capacity of the inductor, but also to note that the lower limit for ripple current is a critical point that if reached will cause discontinuous operation and a considerable drop in efficiency. This can be prevented by choosing a higher inductance value, which will enable continuous operation under light loads. Note that if the inductance value is too high, however, direct current resistance (DCR) is increased and this will also reduce efficiency. The inductance must be set at the point where efficiency is greatest. Note also that the DC superimposition characteristics become worse as the load current value approaches the rated current value of the inductor, so that the inductance value is reduced and ripple current increases, causing loss of efficiency. The selection of rated current value and inductance value will vary depending on where the point of peak efficiency lies with respect to load current. Inductance values are determined by the following formulas. The L value for all load current conditions is set so that the peak to peak value of the ripple current is 1/2 the load current or less. DS04-27247-3E 35 MB39A119 16.8 V output VIN = 24 V (Max) , VO = 16.8 V, IO = 4.0 A, fosc = 500 kHz 1. N-ch MOS FET (PA2752 : NEC product) Main side VDS = 30 V, VGS = 20 V, ID = 8 A, RDS (ON) = 25 m (Typ) , Qg = 10 nC (Typ) Synchronous rectification side VDS = 30 V, VGS = 20 V, ID = 8 A, RDS (ON) = 25 m (Typ) , Qg = 10 nC (Typ) Drain current : Peak value The peak drain current of this FET must be within its rated current. If the FET's peak drain current is ID, it is obtained by the following formula. Main side VIN-Vo ID Io + tON 2L 24-16.8 4.0 + 2 x 5.2 x 10 x -6 1 x 500 x 103 0.7 4.97 A Synchronous rectification side Vo ID Io + tOFF 2L 16.8 4.0 + 2 x 5.2 x 10-6 1 x 500 x 103 x (1 - 0.7) 4.97 A 2. Inductor (CDRH104R-5R2 : SUMIDA product) 5.2 H (tolerance 30%) , rated current = 5.5 A L 2 (VIN-Vo) Io tON 2 x (24-16.8) 4.0 x 1 500 x 103 x 0.7 5.04 H 36 DS04-27247-3E MB39A119 The load current satisfying the continuous current condition Vo Io tOFF 2L 16.8 2 x 5.2 x 10 -6 x 1 x 500 x 10-3 (1-0.7) 0.97 A Ripple current : Peak value The peak ripple current must be within the rated current of the inductor. If the peak ripple current is IL, it is obtained by the following formula. VIN-Vo IL IO tON 2L 4.0 + 24-16.8 2 x 5.2 x 10-6 x 1 500 x 103 x 0.7 4.97 A Ripple current : peak-to-peak value If the peak-to-peak ripple current is IL, it is obtained by the following formula. VIN-Vo IL = tON L = 24-16.8 5.2 x 10 -6 x 1 500 x 103 x 0.7 =: 1.94 A DS04-27247-3E 37 MB39A119 12.6 V output VIN = 20 V (Max) , VO = 12.6 V, IO = 4.0 A, fosc = 500 kHz 1. N-ch MOS FET (PA2752 : NEC product) Main side VDS = 30 V, VGS = 20 V, ID = 8 A, RDS (ON) = 25 m (Typ) , Qg = 10 nC (Typ) Synchronous rectification side VDS = 30 V, VGS = 20 V, ID = 8 A, RDS (ON) = 25 m (Typ) , Qg = 10 nC (Typ) Drain current : Peak value The peak drain current of this FET must be within its rated current. If the FET's peak drain current is ID, it is obtained by the following formula. Main side ID Io + VIN-Vo 2L tON 20-12.6 4.0 + 2 x 5.2 x 10 x -6 1 500 x 103 x 0.63 4.90 A Synchronous rectification side ID Io + 4.0 + 38 Vo 2L tOFF 12.6 2 x 5.2 x 10-6 x 1 500 x 103 x (1 - 0.63) 4.90 A DS04-27247-3E MB39A119 2. Inductor (CDRH104R-5R2 : SUMIDA product) 5.2 H (tolerance 30%) , rated current = 5.5 A 2 (VIN-Vo) L tON Io 2 x (24-12.6) x 4.0 1 500 x 103 x 0.63 4.67 H The load current satisfying the continuous current condition Vo Io 12.6 x 2 x 5.2 x 10 -6 IL tOFF 2L 1 500 x 103 x (1-0.63) 897.0 mA VIN-Vo IO tON 2L 4.0 + 20-12.6 2 x 5.2 x 10-6 x 1 500 x 103 x 0.63 4.90 A Ripple current : Peak-to-peak value If the peak-to-peak ripple current is IL, it is obtained by the following formula. VIN-Vo IL = tON L = 20-12.6 5.2 x -6 x 1 500 x 103 x 0.63 =: 1.79 A 3. Diode for bootstrap (SBS006 : SANYO product) VR (DC reverse voltage) = 30 V, Average output current = 500 mA, peak surge current = 10 A VF (forward voltage) = 0.35 V, at IF = 300 mA VR : value that satisfies input voltage Efficiency is somewhat rising in low leak Schottky diode by the use but even if the signal diode is used, it is enough. It is recommended to use low VF. Also, capacitor for bootstrap must be very large than gate capacity of FET at main side. It is recommended to use the capacity of approximately 0.1 F to 1.0 F. DS04-27247-3E 39 MB39A119 4. Charging current setting sense resistor (SL1TTE33L0F : KOA product) 33 m When + INE2 terminal (pin 12) voltage is 3.3 V, and the charging current (IO) is 4.0 A, R4 is obtained by the following formula. + INE2 R4 = 24.5 x IO = =: 3.3 24.5 x 4.0 33.0 m 5. Input current setting sense resistor (SL1TTE15L0F : KOA product) 15 m When + INE1 terminal (pin 7) voltage is 2.25 V, and the input current is 6.0 A, R1 is obtained by the following formula. + INE1 R1 = 25 x I1 = 2.25 25 x 6.0 =: 15.0 m 6. Switching P-ch FET (PA1772 : NEC product, TPC8102 : TOSHIBA product) Q2-1, Q2-2, and Q5 must select an appropriate device according to the input current. 40 DS04-27247-3E MB39A119 REFERENCE DATA Conversion efficiency vs. Charging current (constant voltage mode) Conversion efficiency (%) 100 95 VIN = 19 V VO = 16.8 V setting 90 85 80 75 70 65 60 55 50 0.01 0.1 1 10 Charging current IO (A) Conversion efficiency (%) Conversion efficiency vs. Charging current (constant voltage mode) 100 95 90 VIN = 16 V VO = 12.6 V setting 85 80 75 70 65 60 55 50 0.01 0.1 1 10 Charging current IO (A) Conversion efficiency vs. Charging voltage (constant current mode) Conversion efficiency (%) 100 95 90 VIN = 19 V IO = 4 A setting 85 80 75 70 65 60 55 50 0 2 4 6 8 10 12 14 16 18 20 Charging voltage VO (V) (Continued) DS04-27247-3E 41 MB39A119 Conversion efficiency vs. Charging voltage (constant current mode) Conversion efficiency (%) 100 95 90 VIN = 16 V IO = 4 A setting 85 80 75 70 65 60 55 50 0 2 4 6 8 10 12 14 16 18 20 Charging voltage VO (V) Charging voltage vs. Charging current Charging voltage VO (V) 18 16 VIN = 19 V VO = 16.8 V setting 14 12 SW3 = ON SW4 = ON 10 SW3 = ON SW4 = OFF SW3 = OFF SW4 = OFF 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Charging current IO (A) Charging voltage vs. Charging current Charging voltage VO (V) 18 VIN = 16 V VO = 12.6 V setting 16 14 12 SW3 = ON SW4 = ON 10 SW3 = ON SW4 = OFF SW3 = OFF SW4 = OFF 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Charging current IO (A) (Continued) 42 DS04-27247-3E MB39A119 Switching waveform (constant voltage mode) OUT-1 (V) OUT-1 20 15 10 5 VIN = 19 V VO = 16.8 V setting IO = 2 A SW3 = OFF SW4 = OFF 0 OUT-2 (V) 5 OUT-2 0 -5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0(s) Switching waveform (constant current mode) OUT-1 (V) OUT-1 20 15 10 5 VIN = 19 V VO = 12 V IO = 4 A setting SW3 = OFF SW4 = OFF 0 OUT-2 (V) 5 OUT-2 0 -5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0(s) Switching waveform (constant voltage mode) VS (V) 20 VS 15 10 5 VIN = 19 V VO = 16.8 V setting IO = 2.0 A SW3 = OFF SW4 = OFF 0 -5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0(s) (Continued) DS04-27247-3E 43 MB39A119 Switching waveform (constant current mode) VS (V) VIN = 19 V VO = 12 V IO = 4.0 A setting SW3 = OFF SW4 = OFF 20 VS 15 10 5 0 -5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0(s) Oscillation frequency vs. Charging current Oscillation frequency fOSC (kHz) 600 550 OUT-1 500 450 VIN = 19 V VO = 16.8 V setting 400 350 OUT-2 300 250 200 150 100 50 0 0.000 1.000 2.000 3.000 4.000 5.000 Charging current IO (A) Oscillation frequency charging voltage vs. Input voltage 24.0 fosc 550 22.0 20.0 500 VO 450 18.0 400 16.0 350 14.0 300 12.0 250 VO = 16.8 V setting RL = 10 200 10.0 8.0 150 6.0 100 4.0 50 2.0 0 17 18 19 20 21 22 23 24 Charging voltage VO (V) Oscillation frequency fOSC (kHz) 600 0.0 25 Input voltage VIN (V) (Continued) 44 DS04-27247-3E MB39A119 Soft-start operating waveform (constant current mode) Vo (V) 18 Io (A) 5 Vo 16 14 4 CVM (V) 5 CVM 3 2 0 VIN = 19 V IO = 4 A setting SW3 = OFF SW4 = OFF 1 Io CTL (V) 10 0 CTL 4 0 0 8 12 16 20 24 28 32 36 40 (ms) Soft-start operating waveform (constant current mode) Vo (V) 18 Vo Io (A) 5 16 VIN = 19 V IO = 4 A setting SW3 = OFF SW4 = OFF Io 4 14 CVM (V) 5 3 CVM 2 0 1 CTL (V) 0 10 CTL 0 0 4 8 12 16 20 24 28 32 36 40 (ms) (Continued) DS04-27247-3E 45 MB39A119 Soft-start operating waveform (constant voltage mode) Vo (V) 18 Vo Io (A) 5 16 14 CVM (V) 5 4 CVM 3 2 0 VIN = 19 V VO = 16.8 V setting SW3 = OFF SW4 = OFF 1 CTL (V) Io 10 0 CTL 0 4 0 8 12 16 20 24 28 32 36 40 (ms) Soft-start operating waveform (constant voltage mode) Vo (V) 18 Vo Io (A) 5 16 VIN = 19 V VO = 16.8 V setting SW3 = OFF SW4 = OFF 4 3 14 CVM (V) 5 CVM 0 2 Io 1 0 CTL (V) 10 CTL 0 0 4 8 12 16 20 24 28 32 36 40 (ms) (Continued) 46 DS04-27247-3E MB39A119 Load-step response operation waveform (C.V modeC.C mode) 6 Vo (V) 18 5 16 Io (A) Vo 14 4 3 VIN = 19 V IO = 4 A setting SW3 = OFF SW4 = OFF 2 1 Io 0 0 2 4 6 8 10 12 14 16 18 20 (ms) Load-step response operation waveform (C.C modeC.V mode) Vo (V) 18 Io (A) Vo 6 16 5 Io 14 4 3 VIN = 19 V IO = 4 A setting SW3 = OFF SW4 = OFF 2 1 0 0 2 4 6 8 10 12 14 16 18 20 (ms) (Continued) DS04-27247-3E 47 MB39A119 (Continued) Load-step response operation waveform (C.V modeC.V mode) Vo (V) 18 Io (A) Vo 6 16 5 VIN = 19 V VO = 16.8 V setting SW3 = OFF SW4 = OFF 4 14 3 2 1 Io 0 0 2 4 6 8 10 12 14 16 18 20 (ms) Load-step response operation waveform (C.V modeC.V mode) Vo (V) 18 Io (A) Vo 6 16 5 14 4 3 VIN = 19 V VO = 16.8V setting SW3 = OFF SW4 = OFF 2 Io 1 0 0 48 2 4 6 8 10 12 14 16 18 20 (ms) DS04-27247-3E MB39A119 LOOP CHARACTERISTICS <Voltage mode> VIN = 19 V Setting VO = 16.8 V VO = 16.8 V (C.V mode) RL = 10 1.E+02 1.E+03 1.E+04 1.E+05 200 180 160 140 120 100 80 60 40 20 0 20 40 60 80 100 120 140 160 180 200 1.E+06 Phase (deg) 50 45 40 35 30 25 20 15 10 5 0 5 10 15 20 25 30 35 40 45 50 1.E+01 200 180 160 140 120 100 80 60 40 20 0 20 40 60 80 100 120 140 160 180 200 1.E+06 Phase (deg) Gain (dB) Gain, phase vs. Frequency Frequency (Hz) <Current mode> Gain (dB) Gain, phase vs. Frequency 50 45 40 35 30 25 20 15 10 5 0 5 10 15 20 25 30 35 40 45 50 1.E+01 VIN = 16 V Setting VO = 8.4 V VO = 6 V (C.C mode) RL = 1.5 1.E+02 1.E+03 1.E+04 1.E+05 Frequency (Hz) DS04-27247-3E 49 MB39A119 USAGE PRECAUTIONS * Printed circuit board ground lines should be set up with consideration for common impedance. * Take appropriate static electricity measures. * Containers for semiconductor materials should have anti-static protection or be made of conductive material. * After mounting, printed circuit boards should be stored and shipped in conductive bags or containers. * Work platforms, tools, and instruments should be properly grounded. * Working personnel should be grounded with resistance of 250 k to 1 M between body and ground. * Do not apply negative voltages. * The use of negative voltages below -0.3 V may create parasitic transistors on LSI lines, which can cause abnormal operation. ORDERING INFORMATION Part number MB39A119QN 50 Package Remarks 28-pin plastic QFN (LCC-28P-M12) DS04-27247-3E MB39A119 PACKAGE DIMENSION 28-pin plastic QFN Lead pitch 0.50 mm Sealing method Plastic mold (LCC-28P-M12) 28-pin plastic QFN (LCC-28P-M12) 3.500.10 (.138.004) 5.000.10 (.197.004) 5.000.10 (.197.004) INDEX AREA 3.500.10 (.138.004) +0.05 0.25 -0.03 (.010 -+.002 .001 ) (3-R0.20) ((3-R.008)) 0.400.10 (.016.004) 0.50(.020) (TYP) 0.08(.003) 0.00 (.000 C +0.05 -0.00 +.002 -.000 1PIN CORNER (C0.30(C.012)) 0.85(.033) MAX 0.20(.008) ) 2007-2008 FUJITSU MICROELECTRONICS LIMITED C28069S-c-1-2 Dimensions in mm (inches). Note: The values in parentheses are reference values. Please confirm the latest Package dimension by following URL. http://edevice.fujitsu.com/package/en-search/ DS04-27247-3E 51 MB39A119 FUJITSU MICROELECTRONICS LIMITED Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ For further information please contact: North and South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 E. Arques Avenue, M/S 333 Sunnyvale, CA 94085-5401, U.S.A. Tel: +1-408-737-5600 Fax: +1-408-737-5999 http://www.fma.fujitsu.com/ Asia Pacific FUJITSU MICROELECTRONICS ASIA PTE LTD. 151 Lorong Chuan, #05-08 New Tech Park, Singapore 556741 Tel: +65-6281-0770 Fax: +65-6281-0220 http://www.fujitsu.com/sg/services/micro/semiconductor/ Europe FUJITSU MICROELECTRONICS EUROPE GmbH Pittlerstrasse 47, 63225 Langen, Germany Tel: +49-6103-690-0 Fax: +49-6103-690-122 http://emea.fujitsu.com/microelectronics/ FUJITSU MICROELECTRONICS SHANGHAI CO., LTD. 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