AIC1804 Datasheet, PDF (1/12 Pages) Analog Intergrations Corporation – Three- Or Four-Cell Lithium-Ion Battery Protection IC

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 17µA (4-Cell,
V_CELL=3.5V).
l Ultra-Low Power-Down Current at 2.2µA (4-Cell,
V_CELL=2.3V)
l Wide Supply Voltage Range: 2V to 18V.
l Precision Overcharge Protection Voltage:
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 DESCRIPTION
The AIC1804 is designed to protect the lithium-
ion 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 APPLICATIONS
l Protection IC for Three- or Four-Cell Lithium-Ion
Battery Packs.
n TYPICAL APPLICATION CIRCUIT
C_{T D}
82nF
CT I
2.2nF
R8
1K
1 _NSL
2 _OC
3 _CS
4 _OD
5 _TD
6 _TI
7 _TC
CTC
82nF_{8 GND}
VCC ¹⁶
R1
C1
200
0.1µF
UD1 ¹⁵
VC1 ¹⁴
R2
C2
2K
0.1µF
UD2 ¹³
VC2 ¹²
R3
C3
2K
0.1µF
UD3 ¹¹
VC3 ¹⁰
C4
UD4 ⁹
R4
33K
0.1µF
AIC1804
SI4435 M1 ^SI4435
M2
BAT1
FUSE
R5
1M
BATT+
BAT2
BAT3
BAT4
R6
1M
R7
1M
BATT-
Protection Circuit for Four-Cell Lithium-Ion Battery Pack
DS-1804-01 July 13, 00
www.analog.com.tw
1