Advanced Analog Technology, Inc.
Product information presented is current as of publication date. Details are subject to change without notice
ONE-CELL LI-ION BATTERY PROTECTION IC
FEATURES
GENERAL DESCRIPTION
z Ideal for One-Cell Rechargeable Li-Ion
The AAT8641 series are designed for the
protection of one-cell rechargeable Li-Ion battery
pack against over charge, over discharge, over
current and short circuit. They use CMOS
process to provide high accuracy voltage
detection while consuming relatively low amount
of current.
Battery Packs
z High Accuracy Voltage Detection
z Low Current Consumption:
3μA Supply Current (Typical)
0.1μA Shutdown Current
z 3-Level Over Current Detection:
Over-Current Level 1 /Over Current Level 2
/ Short Circuit
Each of the AAT8641 devices incorporates
voltage comparators, bandgap reference voltage
generator, signal delay circuit, short circuit
detector, and digital control circuit.
z Wide Operating Temperature Range:
o
− 40 C to +85 oC
z Small SOT25 Package
During the charge process, when the battery
voltage is charged to a value higher than VC1
(Over Charge Threshold Voltage), the output of
Cout pin switches to low level, i.e., the VN pin
PIN CONFIGURATION
level. The output of Cout pin will switch to high
level when the battery voltage is at a level lower
than VC2 (Over Charge Release Voltage), or
TOP VIEW
when the charger is disconnected from the battery
pack and the battery voltage level is in between
VC1 and VC2 .
COUT
VN
During the discharge process, when the battery
voltage drops to a value lower than VD1 (Over
Discharge Threshold Voltage), the output of
Dout pin switches to low level immediately after
GND
DOUT
the internal delay time elapses. The output of
Dout pin will switch to high level when the
battery voltage is at a level higher than VD2
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, Inc. –
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