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MITSUMI
Lithium Ion Battery Charging Control MM1532
Lithium Ion Battery Charging Control
Monolithic IC MM1532
Outline
This IC is a lithium ion battery charging controller, with protection circuits such as constant-current, constantvoltage charging and pre-charge, battery temperature detection function and others all on one chip. The timer function on charging IC MM1475 has been omitted to achieve a smaller package, changed SW function from MM1485.
Features
1. Output voltage (Ta = 0 ~ +50C) 4.20030mV 2. Consumption current 1 1.5mA typ. Pre-charge function Adaptor (primary side) abnormality detection function 3. Battery temperature detection function
Package
TSOP-16A
Applications
1. Lithium ion battery charging control
Absolute Maximum Ratings
Item Storage temperature Operating temperature Power supply voltage Allowable loss SW2 Input voltage
(Ta=25C) Symbol TSTG TOPR VCCMAX PD VSW2 Ratings -40~+125 -20~+70 -0.3~+15 250 -0.3~VCC+0.3 Unit C C V mW V
MITSUMI
Lithium Ion Battery Charging Control MM1532
Block Diagram
SW1 and SW2 Specifications SW1 L H L H SW2 H H L L Charge ON ON OFF ON Current Limit Controlled by the adaptor (current limit 1:450mV) Controlled by the adaptor (current limit 1:450mV) Controlled by the IC (current limit 2:25mV)
Pin Assignment
1 2 16 15 14 13 12 11 10 9 3 4 12345678 TSOP-16A 5 6 7 8 SW1 SW2 VREF GND ADJ CDO TOUT TDET 9 10 11 12 13 14 15 16 BAT CFB CNT CS VCC VOUT2 VOUT1 VDET-TD
MITSUMI
Lithium Ion Battery Charging Control MM1532
Pin Description
Pin No. 1 2 3 4 Pin Name SW1 SW2 VREF GND I/O Input Input Output Input Function
Charging control switching pin. Switches charging ON/OFF and charging current by combinations of SW1 and SW2 L and H. Reference power supply output pin. Outputs 1.2V typ. reference voltage. GROUND pin. Pre-charge current adjustment pin. Pin voltage is set at 100mV typ. Pre-charge current can be adjusted by adjusting the pin voltage with an external resistor, etc. Pre-charge current is controlled by comparing the ADJ pin voltage and voltage drop value of 12dB between VCC-CS. Current detection output pin. Outputs current difference value of 18dB between VCC-CS. Temperature detection output pin. Normal temperature: Output Tr OFF High temperature detection: Output Tr ON Temperature detection input pin. Use external resistor and thermistor to apply resistance-divided potential from reference voltage. Battery voltage input pin. Detects battery voltage and controls charging. Constant-current control phase compensation pin. Connect an external capacitor (around 100pF) between CFB and CNT to perform phase compensation for improved oscillation. Charging control output pin. Controls external PNP-Tr base and performs constant-current, constantvoltage charging. Current detection pin. Current is detected by voltage drop at external resistor between VCC-CS and charging current is controlled. Power supply input pin. Adaptor unplugged detection output pin. VCC low voltage input: Output Tr OFF VCC recommended operating voltage: Output Tr ON Overvoltage detection output pin. VCC overvoltage input: Output Tr OFF VCC recommended operating voltage: Output Tr ON Overvoltage detection delay time setting pin. Delay time can be set by connecting an external capacitor.
5
ADJ
Input
6 7
CDO TOUT TDET BAT CFB CNT CS VCC VOUT2 VOUT1 VDET-TD
Output Output Input Input Input Output Input Input Output Output Input
8 9 10
11
12 13 14
15 16
MITSUMI
Lithium Ion Battery Charging Control MM1532
Pin Description
Pin No. Pin name 1 SW1
The following valaeis typical Internal equivalent circuit diagram Pin No. Pin name 9 BAT Internal equivalent circuit diagram
2
SW2 10 CFB
3
VREF
11
CNT
5
ADJ
12
CS
14 6 CDO
VOUT2
15
VOUT1
7
TOUT 16 VDET-TD
8
TDET
MITSUMI
Lithium Ion Battery Charging Control MM1532
Electrical Characteristics
Item Consumption current 1 Consumption current 2 Reference voltage ADP detection voltage L ADP detection voltage L hysteresis voltage width ADP detection voltage H ADP detection voltage H hysteresis voltage width BAT pin leak current BAT pin output voltage CNT pin output voltage SW1 pin input current SW1 pin input voltage H SW1 pin input voltage L SW2 pin input current SW2 pin input voltage H SW2 pin input voltage L Current limit 1 Current limit 2 Current detection amp gain Current detection amp output offset voltage Current detection amp output current outflow VOUT1 pin output voltage VOUT2 pin output voltage Battery temperature detection voltage Battery temperature detection voltage hysteresis voltage width TOUT pin output voltage TDET input bias current
(Except where otherwise indicated Ta=25C, VCC=5V) Measurement Min. Typ. Max. Unit pin 13 13 3 VCC : H L 14 14 VCC : L H 15 15 9 Ta=0~+50C ICNT=20mA 9 11 1 1 1 2 2 2 Quick charge Pre-charge 12,13 12,13 6 6 6 IOUT1=0.12mA IOUT2=0.12mA VTDET : H L 15 14 8 8 ITOUT=0.12mA 7 8 0.35 20 17.5 -4.5 0.5 0.45 25 18.0 0 1.0 0.2 0.2 0.4 0.4 6 2 12 40 0.6 60 2.70 50 5.8 50 1.5 3.5 1.207 2.80 100 6.0 100 2.90 150 6.2 150 1 4.170 4.200 4.230 0.5 80 1.20 0.25 18 VCC 0.25 0.55 30 18.5 4.5 2.3 5.3 mA mA V V mV V mV A V V A V V A V V V mV dB mV mA V V V mV V nA
Symbol ICC1 ICC2 VREF VADPL VADPLW VADPH VADPHW IBAT VBAT VCNT ISW1 VSW1H VSW1L ISW2 VSW2H VSW2L VL1 VL2 GI VOFF ICDO VOUT1 VOUT2 VTDET VTDETW VTOUT IT
Conditions VSW1=1.2, VSW2=0V VSW1=0, VSW2=5V
0.390 0.413 0.435 30 60 0.2 30 90 0.4 150
Current limits and 2 are prescribed by of * Safety can not1be guaranteed if this IC isthe amountandcurrent detection resistor voltage drop.protect with damaged control no longer is possible. Please * something other than this IC.
MITSUMI
Lithium Ion Battery Charging Control MM1532
Measuring Circuit
MITSUMI
Lithium Ion Battery Charging Control MM1532
Measurement Procedures
Item Consumption current 1 Consumption current 2 Reference voltage ADP detection voltage L ADP detection voltage L hysteresis voltage width ADP detection voltage H ADP detection voltage H hysteresis voltage width BAT pin leak current BAT pin output voltage CNT pin output voltage SW1 pin input current SW1 pin input voltage H SW1 pin input voltage L SW2 pin input current SW2 pin input voltage H SW2 pin input voltage L Current limit 1 Current limit 2
(Except where otherwise indicated Ta = 25C, VCC = 5V, VCC: current limit 0.5A, V1 = 0V, V2 = VCC, V9 = 4.27V, S6, 7, 8, 11, 14, 15: A)
Current detection amp gain
Current detection amp output offset voltage Current detection amp output current outflow VOUT1 pin output voltage VOUT2 pin output voltage Battery temperature detection voltage hysteresis voltage width Battery temperature detection voltage hysteresis voltage width TOUT pin output voltage TDET input bias current
Measurement Procedure Measure A13 current value ICC1 at V1 =1.2V, V2 = 0V. Measure A13 current value ICC2. Measure T3 potential VREF. Gradually lower VCC from 5V. VCC potential is VADPL when T14 potential goes above VCC - 0.5V. Gradually raise VCC from 2V. VCC potential is VADPL2 when T14 potential goes under 0.5V. VADPLW = VADPL2 - VADPL Gradually raise VCC from 5V. VCC potential is VADPH when T15 potential goes above VCC - 0.5V. Gradually lower VCC from 7V. VCC potential is VADPH2 when T15 potential goes under 0.5V. VADPHW = VADPH - VADPH2. VCC = 0V, V2=0V, S11: B, V11 = 0V. Measure A9 current value IBAT. Gradually raise V9 from 3.5V. T9 potential is VBAT when the potential difference between T13-T12 is 20mV or less. V9 = 3.5V, S11: B. Gradually raise V11 from 0V. T11 potential is VCNT when A11 current value is 20mA. Measure A1 current value ISW1. V9 = 3.5V, V2 = 0V. Raise V1 from 0V to 1.2V. Identify VSW1 H or L; when A9 is 50mA or higher, charging ON at current limit 2, and when A9 is 1mA or lower, charging is OFF. V1=0V, V2=2V. Measure A2 current value ISW2. V9 = 3.5V, V1=0V. Raise V2 from 0V to VCC. Identify VSW2 H or L; when A9 is 450mA or higher, charging ON at current limit 1, and when A9 is 1mA or lower, charging is OFF. V1 = 0V, V2=VCC, V9=3.5V. Gradually raise VCC current limit value and measure the potential difference between T13-T12, VL1. V1 = 1.2V, V2=0V, V9=2.5V. Potential difference between T13-T12 is VL2. V9 = 3.5V. The potential difference fluctuation between T13-T12 when VCC current limit value is changed from 100mA to 200mA is Va and the T6 potential fluctuation is Vb. G1 = 20log Vb/ Va V9 = 4.0V. T6 potential is Vb2 when VCC current limit is 100mA. VOFF = Vb2/8 - 30mV V9 = 3.5V, VCC current limit value is 300mA, S6: B, V6 = 0V. Measure A6 current value. S15: B. Gradually raise V15 from 0V. T15 potential is VOUT1 when A15 current value is 0.12mA. S14: B. Gradually raise V14 from 0V. T14 potential is VOUT2 when A14 current value is 0.12mA. S8: B. Gradually lower V8 from 0.6V. T8 potential is VTDET when T7 potential is 0.3V or under. S8: B. Gradually raise V8 from 0V. T8 potential is VTDET2 when T7 potential is 0.8V or higher. VTDETW = VTDET2 - VTDET. S8: B, V8 = 0V, S7: B. Gradually raise V7 from 0V. T7 potential is VTOUT when A7 current value is 0.12mA. S8: B, V8 = 0V. Measure A8 potential value IT.
MITSUMI
Lithium Ion Battery Charging Control MM1532
Timing Chart
VCC VCC : ON Start 5V
OV BAT pin voltage 4.20V 3V 2V
Charging current OA Precharge H SW1 L H SW2 L Full charge
Application Circuits
MITSUMI
Lithium Ion Battery Charging Control MM1532
Characteristics
Current Limit 1 vs Ambient temperature
0.6 0.55 0.5 0.45 0.4 0.35 0.3 -25 0 25 50 75
Current Limit 2 vs Ambient temperature
50
Current Limit 2 (mV)
Current Limit 1 (V)
40 30 20 10 0 -25
0
25
50
75
Ambient temperature (C)
Ambient temperature (C)
BAT Pin Output Voltage vs Ambient temperature
BAT Pin Output Voltage (V)
4.25 4.24 4.23 4.22 4.21 4.20 4.19 4.18 4.17 4.16 4.15 -25 When VBAT=4.2V
Current Detection Input/Output
CDO Output Voltage (V)
2.5 2 1.5 1 0.5 0 Ta=25C
0
25
50
75
0
50
100
150
200
250
300
Ambient temperature (C)
Potential Difference between (CS+) and (CS-) (mV)
VCNT Voltage vs ICNT Current
Ta=25C 0.5
BAT Pin Reverse Current vs BAT Pin Voltage
0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Ta=25C
0.4 0.3 0.2 0.1 0 0 10 100
BAT Reverse Current (A)
VCNT Voltage (V)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
ICNT Current (mA)
BAT Pin Voltage (V)
ADP Detection H Delay Time
ADP Detection H Delay Time (ms)
2 15 10 5 0 0 0.02 0.04 0.06 0.08 0.1 Ta = 25C, Vcc = 0 6.5V
Capacitance between (VDET-TD) and GND (F)

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