MITSMI MM1373E, MM1373A, MM1373B, MM1373C, MM1373D Datasheet

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 V

CEL=2.3V 0.3µA typ.

3. Input current between cell pins V

CEL=3.8V ±0.3µA max.

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

5. Overcharge detection delay time C

T=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 Hysteresis

Rank A 4.350V 250mV

Rank B 4.250V 250mV

Rank C 4.225V None

Rank D 4.130V None

Rank E 4.450V 100mV

MITSUMI

Detection of Lithium Ion Battery Overcharging MM1373

Pin Assignment

1432

8567

SOP-8C, SOP-8E

1 OUT

2 C

T

3 GND

4 V1

5 V2

6 V3

7 V4

8 V

CC

Block Diagram