One Cell Lithium-ion/Polymer Battery Protection IC
The HM9902D product is a high
integration solution for lithium-
ion/polymer battery protection.
HM9902D contains advanced power
MOSFET, high-accuracy voltage
detection circuits and delay circuits.
HM9902D is put into an SOP8-PP
package and only one external
component makes it an ideal solution in
limited space of battery pack.
HM9902D has all the protection functions
required in the battery application including
overcharging, overdischarging, overcurrent
and load short circuiting protection etc. The
accurate overcharging detection voltage
ensures safe and full utilization charging.
The low standby current drains little current
from the cell while in storage.
The device is not only targeted for digital
cellular phones, but also for any other
Li-Ion and Li-Poly battery-powered
information appliances requiring long-
term battery life.
· Protection of Charger Reverse
· Protection of Battery Cell Reverse
· Integrate Advanced Power MOSFET
with Equivalent of 17mΩ RDS(ON)
· SOP8-PP Package
· Only One External Capacitor
· Over-temperature Protection
· Overcharge Current Protection
· Two-step Overcurrent Detection:
-Load Short Circuiting
· Charger Detection Function
· 0V Battery Charging Function
- Delay Times are generated inside
· High-accuracy Voltage Detection
· Low Current Consumption
- Operation Mode:6μ A typ.
- Power-down Mode: 3μ A typ.
· RoHS Compliant and Lead (Pb) Free
One-Cell Lithium-ion Battery Pack
Lithium-Polymer Battery Pack
Figure 1. Typical Application Circuit
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