AIC1811
One-Cell Lithium-Ion Battery Protection IC
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FEATURES
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DESCRIPTION
The AIC1811 battery protection IC is designed to
protect
lithium-ion
the
battery
from
to
damage
or
degrading
lifetime
due
overcharge,
and
Less
External
Reduction in Board Size due to Miniature
Package
SOT-23-5
Components.
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Ultra-Low Quiescent Current at 7µA (V
CC
=3.5V).
Ultra-Low Power-Down Current at 0.4µA (V
CC
=2.3V).
Precision Overcharge Protection Voltage
4.35V
±
50mV for the AIC1811A
4.30V
±
50mV for the AIC1811B
4.25V
±
50mV for the AIC1811C
overdischarge, and/or overcurrent for one-cell
lithium-ion battery powered systems, such as
cellular phones. The ultra-small package and less
required external components make it ideal to
integrate the AIC1811 into the limited space of
battery pack.
The
accurate
±50mV
overcharging
detection
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Built-in Delay Time Circuits for Overcharge,
Over-discharge, and Overcurrent Protection.
Load Detection Function during Overcharge
Mode.
Two Detection Levels for Overcurrent Protection.
voltage ensures safe and full utilization charging.
Three 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.
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APPLICATIONS
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Protection IC for One-Cell Lithium-Ion Battery
Pack.
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TYPICAL APPLICATION CIRCUIT
BATT+
FUSE
R1
BATTERY
100
C1
0.1µF
2
3
GND
OD
OC
1
R3
AIC1811
10M
BATT-
M2 SI9926
5
VCC
CS
4
R2
51K
M1
SI9926
Protection Circuit for One-Cell Lithium-Ion Battery
DS-1811-00 June 7, 00
www.analog.com.tw
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AIC [ ANALOG INTERGRATIONS CORPORATION ]
