The LM3658 is a single chip charger IC designed for hand held applications. It can safely charge and maintain a single cell Li-Ion/Polymer battery operating from an AC wall adapter or USB power source. Input power source selection of USB/AC is automatic. With both power sources present, the AC power source has priority. Charge current is programmed through an external resistor when operating from an AC wall adapter allowing charge currents from 50 mA to 1000 mA. When the battery is charged using USB power, charge currents of 100 mA or 500 mA are pin-selectable. The termination voltage is controlled to within ±0.35% of 4.2V.
Features
Integrated power FETs with thermal regulation
Charges from either an AC wall adapter or USB power source with automatic source selection
50 mA to 1000 mA charge currents using AC wall adapter
Pin-selectable USB charge currents of 100 mA or 500 mA
Continuous battery temperature monitoring
Built-in multiple safety timers
Charge status indication
Continuous over-current and temperature protection
