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MM1248

Control of Lithium Ion Battery Charging and Discharging

Mitsumi 

MITSUMI

Control of Lithium Ion Battery Charging and Discharging MM1248

Control of Lithium Ion Battery Charging and Discharging

Monolithic IC MM1248

Outline

This IC was developed for use in controlling charging and discharging of lithium ion batteries (battery modules

with three cells connected in series). In charging control, the voltage of the battery module as a whole is

controlled in constant-voltage control. Discharge control and monitoring of overvoltage rely on monitoring of

the voltages of individual cells.

Features

1. Charging control voltage

VBATH=12.465V±1.5% (Ta=-20°C~70°C)

2. Overcharge detection voltage

VCELL=4.335V±1.5% (Ta=-20°C~70°C)

3. Internal circuit for setting dead time (for overvoltage detection, discharge control)

4. Low consumption current on overdischarge IBATH3=1µA typ.

5. High-precision internal overvoltage detection startup circuit (cell voltage 4.2V or higher at end of charging)

Package

SOP-16B (MM1248XF)

Absolute Maximun Ratings (Except where noted otherwise, Ta=25°C)

Item

Storage temperature

Operating temperature

Input voltage

Charge voltage

Power supply voltage

Voltage applied to OV2 pin

Allowable loss

Symbol

TSTG

TOPR

VIN max.

VBAT max.

VCC max.

VO2 max.

Pd

Ratings

-40~+125

-20~+70

18

15

15

10

350

Units

°C

°C

V

V

V

V

mW

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