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MM1373C

Detection of Lithium Ion Battery Overcharging

Mitsumi 

MITSUMI

Detection of Lithium Ion Battery Overcharging MM1373

Detection of Lithium Ion Battery Overcharging

Monolithic IC MM1373

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

Package

SOP-8C

SOP-8E

Applications

1. For secondary protection of lithium ion battery packs

Overcharge Detection ICs

MM1373 Detection voltage

Rank A

4.350V

Rank B

4.250V

Rank C

4.225V

Rank D

4.130V

Rank E

4.450V

Hysteresis

250mV

250mV

None

None

100mV

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