Charging System Safety Circuit
ISL9211A
NROETCROEMCMOEMNMDEENIDSDLRE9ED2P1F1LOBARCENMEEWNDTEPSAIGRTNS
Charging System Safety Circuit
DATASHEET
FN670...
Description
ISL9211A
NROETCROEMCMOEMNMDEENIDSDLRE9ED2P1F1LOBARCENMEEWNDTEPSAIGRTNS
Charging System Safety Circuit
DATASHEET
FN6702 Rev 3.00 November 5, 2014
The ISL9211A is an integrated circuit (IC) optimized to provide a redundant safety protection to a Li-ion battery charging system. The IC monitors the input voltage, the battery voltage, and the charge current. When any of the three parameters exceeds its limit, the IC turns off an internal N-channel MOSFET to remove the power from the charging system to the battery. In addition to the above protected parameters, the IC also monitors its own internal temperature and turns off the Nchannel MOSFET when the temperature exceeds +150°C. Together with the battery charger IC and the protection module in a battery pack, the charging system using the ISL9211A has triple-level protection and is two-fault tolerant.
The IC is designed to turn on the internal NFET slowly to avoid inrush current at power up but will turn off the NFET quickly when the i...
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