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AIC1802 Datasheet

  • AIC1802

  • Analog Intergrations Corporation [Two-Cell Lithium-Ion Batt...

  • 135.22KB

  • AIC

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AIC1802
Two-Cell Lithium-Ion Battery Protection IC
n
FEATURES
l
n
DESCRIPTION
The AIC1802 battery protection IC is designed
to protect lithium-ion batteries from damage due
to
overcharging,
overdischarging,
and
overcurrent for two series cells in portable
phones and laptop computers. It can be a part of
the low-cost charge control system within a two-
cell lithium-ion battery pack.
Safe and full utilization charging is ensured by
the accurate
鹵30mV
overcharge detection.
Three
different
specification
values
for
overcharge protection voltage are provided for
various protection requirements. The very low
standby current drains little current from the
cells while in storage.
Ultra-Low Quiescent Current at 10碌A (V
CC
=7V,
V
C
=3.5V).
Ultra-Low Power-Down Current at 0.2碌A (V
CC
=3.8V, V
C
=1.9V).
Wide Supply Range: 2 to 18V.
Precision Overcharge Protection Voltage
4.35V
鹵
30mV for the AIC1802A
4.30V
鹵
30mV for the AIC1802B
4.25V
鹵
30mV for the AIC1802C
l
l
l
l
Built-in Delay Circuits for Overcharge, Over-
discharge and Overcurrent Protection.
Overcharge and Overdischarge Delay Time
can be Extended by External Capacitors.
Built-in Cell-balancing Bleeding Network under
Overcharge Condition.
l
l
n
APPLICATIONS
l
Protection IC for Two-Cell Lithium-Ion Battery
Pack.
n
TYPICAL APPLICATION CIRCUIT
V
BAT
+
**R1
C1
1
碌
F
C2
1
碌
F
**R2
M1
CEM9926
2 OD
AIC1802
CS
7
8
VCC
TC
5
*C
TC
6 VC
TD
3
*C
TD
4
GND
OC
1
R3
1M
Q1
R6
1K
M2
CEM9926
BATTERY 1
BATTERY 2
R4
1M
R5
C3
0.01碌F 1M
V
BAT
-
*C
TC
& C
TD
are optional for delay time adjustment.
**R1 & R2: Refer application informations.
Protection Circuit for Two-Cell Lithium-Ion Battery Pack
DS-1802-03
July 13, 00
www.analog.com.tw
1

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