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 4.5V~15.0V

2. Current consumption (VIN pin) VBATT<4.1V 9mA typ.

3. Current consumption (VCC pin) IBATC=0mA 500µA typ.

4. Charging current switching voltage 2.7V±0.1V

5. Charging current (normal conditions) 105mA typ.

6. Charging current (low voltages) 5.0mA typ.

7. Charging control voltage (Ta =-20~+70°C) 4.200V±0.063V

8. Overvoltage detection voltage (Ta =-20~+70°C) 4.335V±0.065V

9. Overvoltage reset voltage 3.50V±0.13V

10.Overvoltage detection non-induction time CCC=2.22µF 0.80S typ.

11.Overvoltage reset non-induction time CCC=0.22µF 0.80S typ.

During discharging

12.Current consumption (Vbat pin) IL=10mA 450µA typ.

13.Current consumption (Vbat pin) IL=0mA 15µA typ.

14.Current consumption (Vbat pin) discharging off, :VBAT<2.4V 0.1µA max.

15.Excess discharging detection voltage 2.30V±0.19V

16.Discharge resumption voltage 2.70V±0.1V

17.Voltage drop between battery and output (VBATT=3.0V, IL=-10mA) 70mV typ.

18.Voltage drop between battery and output (IL=100µA, VBATT=3V) 2.92V typ.

Application

For overnight charging