Outline

This IC controls constant current charging and excess discharge for coin-shaped vanadium lithium batteries and manganese dioxide batteries. It performs constant current charging, stops charging at set voltages, and prevents excess discharging. When the voltage falls bellow a set level, it prohibits discharges and reduces IC current consumption nearly to zero.

Features

During charging

1. Input voltage range 4.0~15.0V

2. Current consumption (during constant current charging) 100µA typ.

3. Current consumption (when charging is off) 30µA typ.

4. Charging current 4.5mA typ.

5. Charging shut-off voltage (Ta=-20~+70°C) 1177AF : 3.275V±75mV

1177BF : 3.0V±70mV

During discharging

1. Discharging shut-off voltage 1.75V±0.15V

2. Current consumption (IL-100µA, VBATT=3V) 5µA typ.

3. Leak current during discharge shut-off 0.1µA max.

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

Applications

1. coin-shaped vanadium lithium batteries

2. Monitors and controls charging and discharging for and manganese dioxide batteries.