AIC AIC1803DCS, AIC1803CCS, AIC1803BCS, AIC1803 Datasheet
AIC1803
µ
µ
Three-Cell Lithium-Ion Battery Protection IC
n FEATURES
l Ultra-Low Quiescent Current at 13
l Ultra-Low Power-Down Current at 1.3
l Wide Supply Voltage Range: 2V to 18V.
l Precision Overcharge Protection Voltage:
4.35V± 30mV for the AIC180 3A
4.30V± 30mV for the AIC180 3B
4.25V± 30mV for the AIC180 3C
4.20V± 30mV for the AIC180 3D
l Externally Set Overcharge, Overdischarge and
Overcurrent Delay Time.
l Built-in Cell-balancing Bleeding Network under
Overcharge Condition.
l Three Detection Levels for Overcurrent Protection.
A (V
CELL
A (V
=3.5V).
=2.3V)
CELL
n APPLICATIONS
l Protection IC for Three-Cell Lithium-Ion Battery Pack.
n DESCRIPTION
The AIC1803 is designed to protect the lithiumion battery from damage or degrading the lifetime
due to overcharging, overdischarging and
overcurrent for three-cell lithium-ion battery
powered systems such as notebook PCs. It can
also provide the cell-balancing “bleeding” function
to automatically discharge the overcharged cell
until the overcharge condition is released.
Safe and full utilization charging is ensured by
the accurate ±30mV overcharge detection. Four
different specification values for overcharge
protection voltage are provided for various
protection requirements. The very low standby
current drains little current from the cell while in
storage.
n TYPICAL APPLICATION CIRCUIT
R8
1K
R4
C4
0.1µF
C1
0.1µF
C2
0.1µF
C3
0.1µF
R1 2K
C
82nF
1 16
2
CS
3
OD
4
NC
5
TD
6
CTC
TI
7
TC
8
NC
TD
TI
C
2.2nF
82nF
AIC1803
VCCOC
VC1
UD1
VC2
UD2
VC3
UD3
GND
15
14
13
12
11
10
9
Protection Circuit for Three-Cell Lithium-Ion Battery Pack
1K
M1
BAT1
2KR2
BAT2
33KR3
BAT3
M2
Q1
R7
1M
BATT-
FUSE
R5
1M
R6
1M
BATT+
DS-1803-01 July 14, 00 www.analog.com.tw
1
n ORDERING INFORMATION
VOLTAGE
D: 4.20V
CS
OD
NC
134
2
OC
TI
5
678
VCC
VC1
1615
TD
UD2
UD1
VC2
VC314121113
UD3
GND
10 9
OC
OC
CS
AIC1803
UD2
V
D
TC
AIC1803
AIC1803 XXX
PACKAGE TYPE
S: SMALL OUTLINE
TEMPERATURE RANGE
C=0°C~70°C
ORDER NUMBER PIN CONFIGURATION
TOP VIEW
AIC1803ACS
AIC1803BCS
AIC1803CCS
AIC1803DCS
(PLASTIC SO)
OVERCHARGE PROTECTION
A: 4.35V
B: 4.30V
C: 4.25V
TC
NC
n ABSOLUTE MAXIMUM RATINGS
Supply Voltage ................................................………………....................................... 18V
DC Voltage Applied on other Pins .........…………………..…....................................... 18V
Operating Temperature Range............................………………......................... -20°C~70°C
Storage Temperature Range .............................……..………..................... - 65°C ~125°C
n TEST CIRCUIT
R
OC
1M
V
V
C
TD
82nF
I
2.2nF
S1
1
R8
1K
C
TI
C
82nF
OC
2
CS
3
OD
4
NC
5
TD
6
TI
7
TC
8
NC
VCC
VC1
UD1
VC2
UD2
VC3
UD3
GND
I
CC
16
I
C1
15
I
UD1
14
I
C2
13
I
12
I
C3
11
I
UD3
10
9
C4
0.1µF
C1
0.1µF
0.1µF
C3
0.1µF
C2
R4
R1 2K
R2 2K
R3 33 K
1K
V
C1
V
C2
V
C3
2
AIC1803
n ELECTRICAL CHARACTERISTICS (Ta=25 °C, unless otherwise specified.)
PARAMETER TEST CONDITIONS
VCC Pin Input Current in Normal
Mode
VC1 Pin Input Current in Normal
Mode
VC2 Pin Input Current in Normal
Mode
VC3 Pin Input Current in Normal
Mode
Vcc Pin Input Current in PowerDown Mode
VC1,VC2,VC3 Input Current in
Power-Down Mode
Overcharge Protection Voltage
V
=3.5V I
CELL
V
=3.5V I
CELL
V
=3.5V I
CELL
V
=3.5V I
CELL
V
=2.3V I
CELL
V
=2.3V I
CELL
SYMBOL
CC
C1
C2
C3
CC(PD)
C(PD)
MIN. TYP. MAX. UNIT
13 20 µA
0.4 1.0 µA
0.4 1.0 µA
0.2 0.5 µA
1.3 2 µA
0.01 0.15 µA
AIC1803A 4.32 4.35 4.38
AIC1803B V
OCP
4.27 4.30 4.33 V
AIC1803C 4.22 4.25 4.28
AIC1803D 4.17 4.20 4.23
Overcharge Hysteresis Voltage
V
Overdischarge Protection Voltage V
Overdischarge Release Voltage
Overcurrent Protection Voltage
Overcharge Delay Time
Overdischarge Delay Time
V
=3.5V V
CELL
V
CELL1=VOCP
30mV→V
V
CELL2
CTC=1nF
V
CELL1
V
CELL2
+30mV
OCP
= V
CELL3
=3.5 V ,
= 2.5V→ 2.3V
= V
CELL3
=3.5V,
CTD=1nF
V
Overcurrent Delay Time (1)
= 3.5V,0.15V<V
CELL
VCS <0.3V,CTI=2.2nF
CC
-
HYS
ODP
V
ODR
OIP
T
OC
T
OD
T
OI1
150 200 250 mV
2.27 2.40 2.53 V
2.85 3.00 3.15 V
135 150 165 mV
10 21 32 mS
10 21 32 mS
7 15 23 mS
3
AIC1803
Supply Voltage (V)
Vcc Pin Power-Down Current (
µA)Supply Voltage (V)
n ELECTRICAL CHARACTERISTICS (Ta=25 °C, unless otherwise specified.)
Overcurrent Delay Time (2)
Overcurrent Delay Time (3)
OC Pin Sink Current
OD Pin Output “H” Voltage V
OD Pin Output “L” Voltage V
Charge Detection Threshold
Voltage
UD1 Pin Cell-Balancing Bleeding
Current
UD2 Pin Cell-Balancing Bleeding
Current
UD3 Pin Cell-Balancing Bleeding
Current
Note: V
V
V
V
PARAMETER TEST CONDITIONS
V
=3.5V,
CELL
0.3V<VCC-VCS<1.0V
V
=3.5V, VCC–
CELL
VCS>1.0V
V
=4.4V,
CELL1
V
= V
CELL2
OC Pin Short to V
V
=2.3V V
CELL
V
=4.4V,
CELL1
V
= V
CELL2
V
=4.4V,
CELL2
V
= V
CELL1
V
=4.4V,
CELL3
V
= V
CELL1
means the battery cell voltage. Therefore,
CELL
= VC1 – V
CELL1
= VC2 – V
CELL2
= V
CELL3
C2
C3
C3
CELL3
CELL3
CELL3
CELL2
=3.5V,
CC
=3.5V
=3.5V
=3.5V
SYMBOL
T
OI2
T
OI3
I
OC
DH
DL
CH
I
UD1
I
UD2
I
UD3
MIN. TYP. MAX. UNIT
2 4 6 mS
150 300 450 µS
2.0 2.8 3.6 mA
V
-0.15V VCC-0.03V V
CC
0.01 0.15 V
V
+0.4 VCC+0.55 V
CC
5.9 8.4 10.9 mA
6.1 8.7 11.3 mA
6.4 9.2 12.0 mA
TYPICAL PERFORMANCE CHARACTERISTICS
n
15
14
13
12
Vcc Pin Input Current (µA)
11
7.8
Vcc Pin Input Current vs. Supply Voltage
Ta=25°C
8.4 9.0 9.6 10.2 10.8 11.4 12.0
Vcc Pin Power-Down Current vs. Supply Voltage
1.3
Ta=25°C
1.2
1.1
1.0
0.9
0.8
4.5 4.8 5.1 5.4 5.7 6.0 6.3 6.6 6.9
4
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