Outline

This IC is for protecting a lithium ion battery from overcharging, excess discharging, and overcurrent. If abnormalities occur during charging and excess voltage is applied, it has a function that turns off the external FET switch when voltage is applied to each battery beyond a specified time (overcharging detection). It also has a function that turns off the external FET switch when the voltage for each battery falls below a set voltage, to prevent excess discharge when discharging the battery (discharging detection).

Features

1. Current consumption (during overcharging) VCELL=4.5V 80µA typ.

2. Current consumption (normal) VCELL=3.5V 13µA typ.

3. Current consumption (during excess discharging) VCELL=1.9V 0.5µA typ.

4. Current consumption (during excess discharging) VCELL=1.0V 0.1µA max.

5. Overcharge detection voltage (Ta=-20°C~+70°C) 4.25V±50mV (detection for each cell)

6. Hysteresis voltage 200mV±60mV (detection for each cell)

7. Excess discharge detection voltage 2.4V±0.1V (detection for each cell)

8. Discharge resumption voltage 3.0V±0.1V (detection for each cell)

9. Overcurrent detection voltage 150mV±15mV

10.Reset after overcurrent detection load release

11.Operating limit voltage 0.9V max.

Applications

1. Cellular phones

2. Movies