Outline

This IC detects overcharging of lithium ion batteries. It is designed for use with three or four battery cells, and detects battery voltages for each cell. An overcharge detection delay time can be set using an external capacitor. The overcharge detection signal output is open-collector, and goes low when overcharging is detected.

Features

1. Consumption current VCEL=3.8V 3.0µA typ.

2. Consumption current VCEL=2.3V 0.3µA typ.

3. Input current between cell pins VCEL=3.8V ±0.3µA max.

4. Overcharge detection voltage A type 4.35V±50mV

5. Overcharge detection delay time CT=0.22µF 1.5S typ.

6. Detection voltage can be changed to accommodate customer needs

Applications

1. For secondary protection of lithium ion battery packs