AIC AIC1804DCS, AIC1804CCS, AIC1804BCS, AIC1804 Datasheet
µ
µ
0.1µFC40.1µFC20.1µFC30.1µF
1M1MR5
BATT-
R2
R1
UD2
M1
2N3906
Q1
82nF
82nF
2.2nF
AIC1804
Three- Or Four-Cell Lithium-Ion Battery
Protection IC
n FEATURES
l Cell Number Selection Function to Select 3 or 4
cells Protection.
l Ultra-Low Quiescent Current at 17
V
=3.5V).
CELL
l Ultra-Low Power-Down Current at 2.2
V
=2.3V)
CELL
l Wide Supply Voltage Range: 2V to 18V.
l Precision Overcharge Protection Voltage:
A (4-Cell,
A (4-Cell,
4.35V± 30mV for the AIC1804A
4.30V± 30mV for the AIC1804B
4.25V± 30mV for the AIC1804C
4.20V± 30mV for the AIC1804D
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.
n APPLICATIONS
l Protection IC for Three- or Four-Cell Lithium-Ion
Battery Packs.
n DESCRIPTION
The AIC1804 is designed to protect the lithiumion battery from damage or degrading the lifetime
due to overcharging, overdischarging and
overcurrent for three- or four-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
1
NSL
2
OC
3
CS
4
OD
5
TD
C
TD
C
TI
6
TI
7
TC
C
TC
8
GND
AIC1804
Protection Circuit for Four-Cell Lithium-Ion Battery Pack
DS-1804-01 July 13, 00 www.analog.com.tw
VCC
UD1
VC1
VC2
UD3
VC3
UD4
16
C1
15
14
13
12
11
10
9
200
2K
R3
2K
R4
33K
SI4435
BAT1
BAT2
BAT3
BAT4
SI4435
M2
R7
1M
R6
FUSE
BATT+
1
VOLTAGE
D: 4.20V
OC
CS
OD
134
2
NSLTI567
8
VCC
UD1161
5
TD
VC2
VC1
UD2
UD3
1412111
3
VC3
UD4
1
0
9
AIC180
UD1
UD2
UD4
1nF
n ORDERING INFORMATION
AIC1804
AIC1804 XXX
ORDER NUMBER PIN CONFIGURATION
PACKAGE TYPE
S: SMALL OUTLINE
TEMPERATURE RANGE
C=0°C~70°C
AIC1804ACS
AIC1804BCS
AIC1804CCS
AIC1804DCS
(PLASTIC SO)
TOP VIEW
OVERCHARGE PROTECTION
A: 4.35V
B: 4.30V
C: 4.25V
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
TC
GND
n TEST CIRCUIT
ROC
1M
VOC
V
CS
VOD OD
C
TD
IOC
C
TI
2.2nF
R8
1K
S1
C
1nF
TC
I
14
12
CC
16
200
R1
C1
I
15
I
C1
I
13
I
C2
I
UD3
11
I
C3
10
I
9
0.1µF
C2
0.1µF
C3
0.1µF
C4
0.1µF
R2 2K
2K
R3
R4 33K
V
CC
V
C1
V
C2
V
C3
1
NSL
2
OC
3
CS
4
5
TD
6
TI
7
TC
8
GND
VCC
UD1
VC1
UD2
VC2
UD3
VC3
UD4
4
2
AIC1804
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
17 26 µA
0.7 1.8 µA
0.4 1.0 µA
0.2 0.5 µA
2.2 4.0 µA
0.01 0.15 µA
AIC1804A 4.32 4.35 4.38
AIC1804B V
OCP
4.27 4.30 4.33 V
AIC1804C 4.22 4.25 4.28
AIC1804D 4.17 4.20 4.23
Overcharge Hysteresis Voltage
Overdischarge Protection Voltage V
Overdischarge Release Voltage
Overcurrent Protection Voltage
Overcharge Delay Time
V
V
=3.5V V
CELL
V
CELL1=VOCP
→V
OCP
V
CELL2
+30mV
= V
CELL3
- 30mV
= V
CELL4
=
HYS
ODP
V
ODR
OIP
T
OC
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
3.5V, CTC=1nF
Overdischarge Delay Time
V
= 2.5V→ 2.3V
CELL1
V
= V
CELL2
CELL3
= V
CELL4
T
OD
10 21 32 mS
=
3.5V, CTD=1nF
Overcurrent Delay Time (1)
V
= 3.5V,0.15V<V
CELL
CC
-
T
OI1
7 15 23 mS
VCS <0.3V,CTI=2.2nF
3
AIC1804
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
OD Pin Output “L” Voltage
Charge Detection Threshold
Voltage
UD1 Pin Cell-Balancing
Bleeding Current
UD2 Pin Cell-Balancing
Bleeding Current
UD3 Pin Cell-Balancing
Bleeding Current
UD4 Pin Cell-Balancing
Bleeding Current
Note: V
PARAMETER TEST CONDITIONS
V
=3.5V,
CELL
0.3V<VCC-VCS<1.0V
V
=3.5V, VCC– VCS>1.0V T
CELL
V
=4.4V,
CELL1
V
= V
CELL2
OC Pin Short to V
CELL3
= V
CELL4
CC
=3.5V,
V
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
V
=4.4V,
CELL4
V
= V
CELL1
means the battery cell voltage. Therefore,
CELL
V
= VCC – V
CELL1
V
CELL2
V
CELL3
V
CELL4
= VC1 – V
= VC2 – V
= V
C1
C2
C3
C3
CELL3
CELL3
CELL2
CELL2
= V
= V
= V
= V
CELL4
CELL4
CELL4
CELL3
=3.5V
=3.5V
=3.5V
=3.5V
SYMBOL
T
OI2
OI3
I
OC
DH
DL
CH
I
UD1
I
UD2
I
UD3
I
UD4
MIN. TYP. MAX. UNIT
2 4 6 mS
150 300 450 µS
2.2 3.2 4.2 mA
V
-0.15V VCC-0.03V V
CC
0.01 0.15 V
V
+0.4 VCC+0.55 V
CC
6.5 9.3 12.1 mA
6.3 9.0 11.7 mA
6.2 8.8 11.4 mA
6.4 9.2 12.0 mA
4
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