THREE OR FOUR-CELL LI
+
BATTERY PROTECTION CIRCUIT
DESCRIPTION
The SA45141 is a three- or four-cell Lithium-Ion Batteries protection
circuit. SA45141 protects for Lithium-Ion Batteries. It has functions
below: Overcharge detection, Overdischarge detection, Overcurrent
detection. When the Lithium-Ion Batteries is in state of overcharge,
overdischarge and overcurrent. The IC turns off and on the external
MOSFET to protect the batteries.
FEATURES
* Low current consumption
-- Overcharge: 55μA (V
CELL
=4.4V CON=0V)
-- Normal: 27μA (V
CELL
=3.5V CON=0V)
-- Overdischarge: 2μA (V
CELL
=1.8V CON=0V)
-- Overdischarge: 0.1μA Max(V
CELL
=1.0V CON=0V)
* Overcharge detection voltage:
two types (4.350±0.025V, 4.250±0.025V)
*Overcharge detection hysteresis voltage:
two types (200±60mV, 8±8mV)
* Overdischarge detection voltage: three types(2.3±0.1V, 2.6±0.2V ,
2.9±0.1V)
* Overdischarge release voltage:
two types (3.0±0.15V, 3.0±0.20V)
* Overcurrent detection voltage: two types(150±15mV,200±15mV)
SSOP-20-225-0.65
APPLICATIONS
* 3-cell or 4-cell lithium-ion batteries
* Notebook PC
* Electric bicycle
*
Electric tool
s
ORDERING INFORMATION
Overcharge
detect
Overcharge
detect voltage hysteresis
（V）
voltage
（mV）
4.350±0.025
SSOP-20-225-0.65
4.350±0.025
4.350±0.025
4.250±0.025
200±60
200±60
200±60
8±8
Overdis-
charge
detect
voltage
（V）
2.3±0.1
2.6±0.2
2.9±0.1
2.9±0.1
Overdis-
charge
release
voltage
（V）
3.00±0.15
3.00±0.20
3.00±0.15
3.00±0.15
Overcurrent
detect
voltage
（mV）
150±15
150±15
200±15
200±15
Device
Package
SA45141SC
SA45141SD
SA45141SE
SA45141SH
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.5
2009.06.05
Page 1 of 10
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATING
Characteristics
Supply Voltage
OV Pin Voltage
SEL Pin Voltage
CON Pin Voltage
Allowable Dissipation
Storage Temperature Range
Operating Temperature Range
Symbol
V
CC
max
V
OV
max
V
SEL
max
V
CON
max
Pd
Tstg
Tamb
Ratings
-0.3~24
-0.3~24
-0.3~24
-0.3~24
300
-40~125
-20~70
Unit
V
V
V
V
mW
°C
°C
ELECTRICAL CHARACTERISTICS
(
Unless otherwise stated, T
amb
=25°C, V
CC
=V4+V3+V2+V1, V
CELL
=3.5, CON=GND, SEL=V
CC
)
Characteristics
Symbol
Test conditions
SA45141SC
Overcharge Detection Voltage
V
U
T
am
b=
0°C ~50°C
SA45141SD
SA45141SE
SA45141SH
4.225
4.250
4.275
4.325
4.350
4.375
V
Min.
Typ.
Max.
Unit
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.5
2009.06.05
Page 2 of 10
Characteristics
Overcharge Detection Hysteresis
Voltage
Symbol
ΔV
U
Test conditions
SA45141SC,SA45141SD
,SA45141SE
SA45141SH
SA45141SC
Min.
140
Typ.
200
Max.
260
Unit
mV
--
2.20
2.40
2.80
2.85
2.80
0.45
0.00
--
135
185
--
8
2.30
2.60
2.90
3.00
3.00
0.70
0.40
0.10
150
200
20
16
2.40
2.80
3.00
3.15
3.20
0.95
0.8
0.35
165
215
40
mV
mV
V
V
V
Overdischarge Detection Voltage
V
D
SA45141SD
SA45141SE ,SA45141SH
SA45141SC ,SA45141SE ,
Overdischarge Release Voltage
V
DF
SA45141SH
SA45141SD
SA45141SC
Overdischarge Detection
Hysteresis Voltage
Overcurrent Detection Voltage
Overcurrent Detection Hysteresis
Voltage
Overcurrent Release
Consumption Current (V
CC
pin) 1
Consumption Current (V
CC
pin) 2
Consumption Current (V
CC
pin) 3
Consumption Current(V
CC
pin) 4
Consumption Current (V
CC
pin) 5
Consumption Current (V4 pin) 1
Consumption Current (V4 pin) 2
Consumption Current (V4 pin) 3
V1 Pin Input Current
V2 Pin Input Current
V3 Pin Input Current
Overcharge Detection dead time
Overdischarge Detection dead time
Overcurrent Detection dead time 1
Overcurrent Detection dead time 2
Overcurrent Detection dead time 3
DCHG Pin Source Current
DCHG Pin Sink Current DCHG
DCHG Pin Output Voltage(High)
DCHG Pin Output Voltage(Low)
ΔV
D
SA45141SD
SA45141SE,SA45141SH
SA45141SC,SA45141SD
SA45141SE,SA45141SH
V
OC
ΔV
OC
Load release: more than 5MΩ
I
CC
1
I
CC
2
I
CC
3
I
CC
4
I
CC
5
I
V4
1
I
V4
2
I
V4
3
I
V
1
I
V
2
I
V
3
t
OV
t
CDC
t
COL
1
t
COL
2
t
COL
3
I
SO
DCH
I
SI
DCH
V
TH
DCH
V
TH
DCL
V
CELL
=4.4V
V
CELL
=3.5V
V
CELL
=1.8V
V
CELL
=3.5V CON= V
CC
V
CEL
L=1.8V CON=V
CC
V
CELL
=4.4V
V
CELL
=3.5V
V
CEL
L=1.8V
V
CEL
L=3.5V
V
CELL=
3.5V
V
CELL
=3.5V
COV=0.1μF
CDC=0.1μF
COL=0.001μF
COL=0.001μF,
V
CC
-CS>1.0V
COL=0.001μF
V
CELL
=1.8V, SW:A
V
DCHG
=V
CC
-0.8V
V
CELL
=3.5V, SW:A
V
DCHG
= 0.8V
V
CC
-VDCHG,I
SO
=20μA
SW: B
V
DCHG
-GND,
ISI=-20μA SW: B
5
20
20
--
--
10
--
--
--
--
15
--
--
0.8
0.8
ms
μA
μA
V
V
--
--
--
--
--
--
--
--
-0.3
-0.3
-0.3
0.5
0.5
5
--
55
27
2
12
1
10
8
2.5
0
0
0
1.0
1.0
10
1.5
110
50
4
20
2
20
15
5.0
0.3
0.3
0.3
1.5
1.5
15
3.0
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
s
s
ms
ms
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.5
2009.06.05
Page 3 of 10
Characteristics
OV Pin Sink Current
OV Pin Leak Current
CON Pin Low Voltage
CON Pin High Voltage
CON Pin Current
SEL Pin Low Voltage
SEL Pin High Voltage
SEL Pin Current
Symbol
I
SI
OV
I
LK
OV
V
CONL
V
CONH
I
CON
V
SELL
V
SELH
I
SEL
Test conditions
V
OV
=0.4V
V
OV
=24V
DCHG=“HIGH”
DCHG= “LOW”
V
CEL
L=3.5V, CON=0.4V
3 cells
4 cells
V
CELL
=3.5V, SEL=0.4V
Min.
100
--
--
V
CC
-0.4
--
--
V
CC
-0.4
--
Typ.
--
--
--
--
1
--
--
1
Max.
--
0.1
0.4
--
2
0.4
--
2
Unit
μA
μA
V
V
μA
V
V
μA
PIN CONFIGURATIONS
PIN DESCRIPTION
Pin no.
1
2
3
4
5
6
7
8
9
10
11
12
Pin name
OV
NC
CS
NC
DCHG
NC
CDC
COL
COV
GND
SEL
NC
I/O
Description
Overcharge detection output pin
Not connected
Overcurrent detection input pin
Not connected
Discharge control FET drive output pin
Normal state: DCHG=Low; Overdischarge state: DCHG=High
Not connected
Overdischarge detection dead time setting pin
Overcurrent detection dead time setting pin
Overcharge detection dead time setting pin
Ground
3 or 4 cell select switch pin
SEL=V1 or GND:3 cell ; SEL=Vcc:4 cell
Not connected
REV:1.5
2009.06.05
Page 4 of 10
O
--
I
--
O
--
--
--
--
--
I
--
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Pin no.
13
14
15
16
17
18
19
20
Pin name
CON
NC
V1
V2
V3
V4
NC
V
CC
I/O
Discharge FET ON/OFF pin
Description
CON=low: DCHG=low, normal ; CON=high: DCHG=high, discharge
prohibited
Not connected
V1 cell positive electrode side ,V2 cell negative electrode side
V2 cell positive electrode side ,V3 cell negative electrode side
V3 cell positive electrode side ,V4 cell negative electrode side
V4cell positive electrode side
Not connected
Power supply input pin
I
--
I
I
I
I
--
--
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.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.5
2009.06.05
Page 5 of 10
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