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HM9902A Datasheet(PDF) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

Part # HM9902A
Description  One Cell Lithium-ion/Polymer Battery Protection IC
PDF  11 Pages
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Manufacturer  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
Direct Link  http://www.hmsemi.com/
Logo HMSEMI - Shenzhen Huazhimei Semiconductor Co., Ltd

HM9902A Datasheet(HTML) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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HM9902A
Figure 3. Functional Block Diagram
FUNCTIONAL DESCRIPTION
The HM9902A monitors the voltage and
current of a battery and protects it from
being damaged due to overcharge voltage,
overdischarge voltage, overdischarge
current, and short circuit conditions by
disconnecting the battery from the load
or charger. These functions are required in
order to operate the battery cell within
specified limits.
The device requires only one external
capacitor. The MOSFET is integrated and
its RDS(ON) is as low as 20mΩ typical.
Normal operating mode
If no exception condition is detected,
charging and discharging can be carried
out freely. This condition is called the
normal operating mode.
Overcharge Condition
- 4 -
Over Temperature Protection
TSHD+
120
oC
Over Temperature Recovery Degree TSHD-
100
Detection Delay Time
Overcharge Voltage Detection
Delay Time
tCU
130
mS
Overdischarge Voltage Detection
Delay Time
tDL
40
mS
Overdischarge Current 1 Detection
Delay Time
tIOV1
VDD=3.5V
10
mS
Load Short-Circuiting Detection
Delay Time
tSHORT
VDD=3.5V
75
uS
Shenzhen H&M Semiconductor Co.Ltd
http：//www.hmsemi.com



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