SA1412
(Continued)
Characteristics
Symbol
Test condition
VH=VL =4.5V
Min.
Typ. Max.
Unit
OC Pin Output Current
Overcurrent Detection Threshold
Value
I
30
150
150
0.45
••
mA
OCH
V
135
165
mV
CS1
CS2
Overcurrent Short Threshold Value
V
0.35
0.55
V
Load release: Load of 5WM or more between both batte
Overcurrent Release
pack pins
Overcurrent Detection Delay Time 1
Overcurrent Detection Delay Time 2
Overdischarge Detection Delay
Time
T
T
7
12
30
18
ms
OC1
••
100
ms
OC2
T
8
13
20
ms
od
Overcharge Detection Dead Time
Start•Up Voltage
T
C
=0.18Uf
0.5
1.0
1.5
s
och
TC
V
V =V =2.5V
H
•0.24 •0.12 •0.04
V
ST
L
PIN DESCRIPTIONS
PIN DESCRIPTION
Pin no.
Pin name
OC
I/O
O
O
I
Description
Overcharge detection output pin
1
2
3
4
5
GD
Discharge control FET (N•ch) control output pin
Overcurrent detection input pin
CS
GND
TD
••
Ground pin, or lower cell load negative pole input pin.
Overcharge detection dead time setting pin
Connection pin for lower cell positive electrode side and upper cell
negative electrode side.
••
6
VL
••
7
8
VCC
VH
••
••
Power supply input pin
Upper cell positive electrode input pin
FUNCTION DESCRIPTION
This IC is a lithium ion battery (2•cell in•series type) protection IC. It has functions below: Overcharge detection,
Overdischarge detection, Overcurrent detection. It controls the batteries charging or discharging by control the
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.2
2007.09.28
Page 3 of 5
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