MITSMI MM1357 Datasheet

MITSUMI

Control of Lithium Ion Batteries (switching regulator secondary) (two cells) MM1357

Control of Lithium Ion Batteries (switching regulator secondary) (two cells)

Monolithic IC MM1357

Outline

This IC is used to control two-cell chargers and the secondary side of switching regulators; it features
enhanced functions for current switching and for overcharge detection and other kinds of protection. The
control output is capable of driving a photocoupler LED. The charging current can be switched between high
and low currents, and each can also be varied externally.

Features

1. Charging voltage : Can be set externally

2. Charging current (switchable between high and low levels, variable) High : 320mV typ.
Low : 145mV typ.

3. Reference voltage : 1.207V typ.

Package

SOP-14B

Applications

1. Switching regulator

2. AC adapter

3. Lithium ion battery charger

MITSUMI

SIP-14B

13 62457

14 11 913 12 10 8

Block Diagram

Control of Lithium Ion Batteries (switching regulator secondary) (two cells) MM1357

Pin Assignment

1 OUT 8 CC OUT

2 CFB 9 S

3 CSR 10 VFB+

4 CC IN 11 V

5 ADJ1 12 REG OUT

6 P

7 ADJ2 14 VFB

-

GND 13 VREF

-

GND

CC

-