SC8201 datasheet(3/9 Pages) SILAN

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SC8201

PIN CONFIGURATION

PIN DESCRIPTIONS

PIN No.

Symbol

I/O

Description

FET gate connection pin for discharge control.

CSI

I/O

Detecting pin for current sense, charger detect.

FET gate connection pin for charge control.

Test pin for delay time.

VDD

Positive power input pin.

VSS

Negative power input pin.

FUNCTION DESCRIPTIONS

Normal state

If VODL<VDD<VOCU and VCH<VCSI<VOI1, M1 and M2 (refer to the typical application circuit, they are used to

control the charge/discharge state) are both turned on. The charging and discharging processes can be operated

normally at this time.

Overcharge Detection

When enter overcharge state from normal state, the battery voltage can be detected from VDD. When the

battery voltage VDD is larger than VOCU over a delay time of TOC, then enter the overcharge state from normal

state and M2 is to be turned off.

Release of Overcharge State

There are two ways to return to normal state from overcharge state.

• If the battery is self discharging and VDD<VOCR occurs, M2 is to be turned on and back to normal state.

• Remove the charger and connected to a load. If VOCR<VDD<VOCU and VCSI>VOI1 occurs, M2 is to be turned

on and back to normal state.

HANGZHOU MICROELECTRONICS CO.,LTD

REV:1.3

2008.06.25

Http://www.silan.com.cn

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