HIGHLAND ELECTRONICS CO., LTD

SIT1051 Secondary Li Battery Protection ICs (PIN TO PIN CW1051)

Package: MSOP8 & SOP8

General Description

Sit1051 is a secondary protection chip specially designed to protect 2-cell, 3-cell, 4-cell or 5-cell lithium ion / polymer batteries, which can reduce the risk of battery damage or shortened service life caused by battery overcharge.

Sit1051 ultra small MSOP8 package and minimum external component requirements make the chip easy to integrate into a limited battery pack.

Application

Notebook, Electric tool, Emergency power supply, Lithium polymer rechargeable battery pack

Features

Built in high-precision voltage detection circuit:

Overcharge detection voltage

High voltage section: VOV = 4.100v to 4.500V; 25mV/step

Accuracy: ± 25mV

Built in overcharge extension

Low consumption current:

1uA (typ.), 3uA (max.) (all) CELL@VCELL = 3.5V)

0.5uA (typ.), 1.5uA (max.)

(All  CELL@VCELL = 2V)

Typical Application Circuit