APL3201

APL3201 Li+ Battery Charger with Thermal Regulation Features Programmable Charge Current Up to 1A Charge Status Output Pins Soft-Start Limits Inrush Current 4.2V Charge Voltage with ±1% Accuracy Fixed 55mA Prequal Charge Current Thermal Limiting Simplifies Board Design External Thermistor Monitor Enable/Disable Control 3mm x 3mm DFN-10 Package (DFN3x3-10) Disable Charging When VIN > 6.4V Lead Free and Green Devices Available (RoHS Compliant) General Description The APL3201 is a constant-current/constant-voltage linear charger for single cell Li+ batteries. The APL3201 needs no external MOSFET or diodes, and accepts input voltage up to 6.0V. The small packages and low external component count make the APL3201 ideally suited for portable applications. On-chip thermal limiting simplifies PC board layout and allows optimum charging rate without the thermal limits imposed by worst-case battery and input voltage. When the APL3201 thermal limit is reached, the charger does not shut down but simply reduces charging current. Ambient or battery temperature can be monitored with an external thermistor. When the temperature is out of range, charging pauses. Other features include the STAT1 and 2 outputs to indicate four charge states, and the EN input, switches the APL3201 on or off. The APL3201 is available in 3mmx3mm DFN-10 package, and operates over the -40°C to +85°C temperature range. Applications PDAs MP3 Players Cell Phones Wireless Appliances Sim...