HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.5

2009.06.05

Page 5 of 10

Pin no.

Pin name

I/O

Description

13

CON

I

Discharge FET ON/OFF pin

CON=low: DCHG=low, normal ; CON=high: DCHG=high, discharge

prohibited

14

NC

--

Not connected

15

V1

I

V1 cell positive electrode side ,V2 cell negative electrode side

16

V2

I

V2 cell positive electrode side ,V3 cell negative electrode side

17

V3

I

V3 cell positive electrode side ,V4 cell negative electrode side

18

V4

I

V4cell positive electrode side

19

NC

--

Not connected

20

--

Power supply input pin

FUNCTION DESCRIPTION

This IC is a lithium-ion batteries (3-cell or 4-cell) protection IC. It has functions below: Overcharge detection,

Overdischarge detection, Overcurrent detection. It controls the batteries charging or discharging by control the

external MOSFET off and on.

1. Overcharge mode

The battery voltage of either 3 cell batteries or 4 cell batteries goes above overcharge detection voltage. The

IC shuts down the charging loop. Dead time can be set by connecting a capacitor.

2. Normal mode

When the battery voltage of both 3 cell batteries and 4 cell batteries are above overdischarge detection voltage

and below overcharge detection voltage, it can realize the normal charging and discharging function.

3. Overdischarge mode

The battery voltage of either 3 cell batteries or 4 cell batteries drops below overdischarge detection voltage.

The IC shuts down the discharging loop. Dead time of overdischarge detection can be set by connecting a

capacitor.

4. Overcurrent mode

The voltage between CS-Vcc goes above overcurrent detection voltage during discharge. The IC shuts down

the discharging loop.

5. Discharge FET ON/OFF pin CON

CON=low: DCHG=low, normal; CON=high: DCHG=high, discharge prohibited.