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| MITSUMI Control of Lithium Ion Battery Charging and Discharging MM1214 Control of Lithium Ion Battery Charging and Discharging Monolithic IC MM1214 Outline This IC controls constant current charging and excess discharge for lithium-ion batteries (sub-batteries). It performs constant current charging, stops charging at set voltages, and prevents excess discharging. When the voltage falls below a set level, it prohibits discharges and reduces IC current consumption nearly to zero. Features During charging 1. Input voltage range 2. Current consumption (VIN pin) 3. Current consumption (VCC pin) 4. Charging current switching voltage 5. Charging current (normal conditions) 6. Charging current (low voltages) 7. Charging control voltage (Ta =-20~+70C) 8. Overvoltage detection voltage (Ta =-20~+70C) 9. Overvoltage reset voltage 10.Overvoltage detection non-induction time 11.Overvoltage reset non-induction time 4.5V~15.0V 9mA typ. 500A typ. 2.7V0.1V 105mA typ. 5.0mA typ. 4.200V0.063V 4.335V0.065V 3.50V0.13V 0.80S typ. 0.80S typ. VBATT<4.1V IBATC=0mA CCC=2.22F CCC=0.22F During discharging 12.Current consumption (Vbat pin) IL=10mA 13.Current consumption (Vbat pin) IL=0mA 14.Current consumption (Vbat pin) discharging off, : VBAT<2.4V 15.Excess discharging detection voltage 16.Discharge resumption voltage 17.Voltage drop between battery and output (VBATT=3.0V, IL=-10mA) 18.Voltage drop between battery and output (IL=100A, VBATT=3V) 450A typ. 15A typ. 0.1A max. 2.30V0.19V 2.70V0.1V 70mV typ. 2.92V typ. Package SSOP-16A (MM1214XF) Application For overnight charging MITSUMI Control of Lithium Ion Battery Charging and Discharging MM1214 Pin Assignment 1 2 16 15 14 13 12 11 10 9 3 4 12345678 SSOP-16A 5 6 7 8 GND N.C TCH CD N.C N.C N.C VOV 9 10 11 12 13 14 15 16 VO2 VO1 VBAT N.C VIN N.C VCC N.C Block Diagram Absolute Maximum Ratings Item Storage temperature Operating temperature input voltage Power supply voltage Battery voltage VOV pin applied voltage TCH pin applied voltage Charging current Output current Allowable power dissipation 1 Allowable power dissipation 2 (Note 1) Symbol TSTG TOPR VINN max. VCC max. VBAT max. VVOV max. VTCH max. ICHG max. IBAT max. Pd1 Pd2 25 Rating -40~+125 -20~+70 18 18 4.4 10 10 -150 -30 500 1000 Units C C V V V V V mA mA mW mW Note 1 : When mounted on glass epoxy board (10 0.8) Plated area 80% (Refer to Fig.1) MITSUMI Control of Lithium Ion Battery Charging and Discharging MM1214 Electrical Characteristics Item (Unless otherwise specified Ta=25C, VCC, VIN=6.5V) Symbol VINOPR1 VINOPR2 VCCOPR IIN ICC IBAT1 IBAT2 IBAT3 VBATC VBATU VBATO VUC VCH VCH ITCH IBATC1 IBAT1CT IBAT2CT IBATC2 VBATS VBATD VCE ISIVOV ILVOV VVOV ISITCH ILTCH VTCH ICDC ICDDC VCDH VTHC1 VTHC2 tDCD1 tDCD2 Measurement Conditions During low-current charging (Note 2) During rapid charge Charging OFF VBAT < 4.1V IBATC=0mA IL=10mA, VCC=0V, VBATT=3V IL=0mA, VCC=0V, VBATT=3V VBAT < 2.4V (Discharging OFF), VCC=0V Ta=-20~+70C Ta=-20~+70C VBATT=4.5V VBATT=2.0V VBATT=3.0V 3.0V 3.0V 2.0V VBATU-VBATC, Ta=-20~+70C 4.137 4.270 3.37 100 2.60 300 -6.5 4.200 4.335 3.50 135 2.70 400 -5.0 2.80 500 -3.5 -95 -90 -90 -80 2.30 2.70 70 1.00 4.00 0.1 0.25 1.00 4.00 0.1 0.25 500 2.65 0.65 2.00 0.40 0.40 680 2.90 0.73 2.35 0.80 0.80 0.35 860 3.15 0.91 2.70 1.60 1.60 -800 -600 -400 0.35 2.49 2.80 100 Min. Typ. Max. Units 4.50 4.50 4.50 9 500 450 15 (15.0) 5.5 15.0 12 750 550 30 0.1 4.263 4.400 3.63 V V V mA A A A A V V V mV V mV mA mA mA mA mA V V mV mA A V mA A V nA nA V V V S S Charging input operation range 1 Charging input operation range 2 Power supply input operation range Current consumption (VIN pin) Current consumption (VCC pin) Current consumption (VBAT pin) 1 Current consumption (VBAT pin) 2 Current consumption (VBAT pin) 3 Charge control voltage Overcharge detection voltage Overcharge reset voltage Detection voltage margin 1 Charge current conversion voltage Charge hysteresis voltage Charge current (During low voltage) Charge current (Normal) Charge current 1 (Normal) Charge current 2 (Normal) Charge with constant current mode OFF Excess discharging detection voltage Discharge resumption voltage Voltage drop between battery and output VOV pin sink current VOV pin leak current VOV pin output voltage TCH pin sink current TCH pin leak current TCH pin output voltage CD pin charge current CD pin discharge current CD pin H voltage CD pin threshold voltage 1 CD pin threshold voltage 2 Overvoltage detection non-induction time Overvoltage reset non-induction time VBATT < VCH- VCH 4.0V > VBAT > VCH Ta=-20~+70C, VIN=4.5V~5.5V Ta=-20~+70C, VIN=4.5V~6.5V VBAT=4.0V VBATT=3.0V 2.0V VCC > 4.5V VBAT=3.0V, IL=10mA VBATT=4.4V, VVOV=0.4V VBAT=4.0V IVOV=1mA VBAT=2.0V, VTCH=0.4V VBAT=3.0V ITCH=1mA VCD=1.5V, VBAT=4.4V VCD=1.5V, VBAT=3.0V VBATT=4.5V VCD=3V VCD=0V 0V 3V -115 -105 -120 -105 -125 -105 -115 2.11 2.60 CCD=0.22F CCD=0.22F Note 2 : During rapid charging, use 5.5 V Vin power supply. Note 3 : VO2 has no current supply capacity, so do not connect load. MITSUMI Control of Lithium Ion Battery Charging and Discharging MM1214 Charcteristics PD [mW] 1200 1000 800 600 400 200 25 50 Fig.1 70 100 125 SSOP-16A When mounted on glass epoxy base (10 25 0.8 [mm]) Prated area 80% TEMP [C] Application Circuits |
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