MM1214

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~+70°C) 8. Overvoltage detection voltage (Ta =-20~+70°C) 9. Overvoltage reset voltage 10.Overvoltage detection non-induction time 11.Overvoltage reset non-induction time 4.5V~15.0V 9mA typ. 500µA typ. 2.7V±0.1V 105mA typ. 5.0mA typ. 4.200V±0.063V 4.335V±0.065V 3.50V±0.13V 0.80S typ. 0.80S typ. VBATT VCH Ta=-20~+70°C, VIN=4.5V~5.5V Ta=-20~+70°C, 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=0.22µF CCD=0.22µF 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