ISL9203

www.DataSheet4U.com ® ISL9203 Data Sheet February 3, 2005 FN6106.0 Li-ion/Li Polymer Battery Charger The ISL9203 is an integrated single-cell Li-ion or Li-polymer battery charger capable of operating with an input voltage as low as 2.4V. This charger is designed to work with various types of ac adapters. The ISL9203 operates as a linear charger when the ac adapter is a voltage source. The battery is charged in a CC/CV (constant current/constant voltage) profile. The charge current is programmable with an external resistor up to 1.5A. The ISL9203 can also work with a current-limited adapter to minimize the thermal dissipation, in which case the ISL9203 combines the benefits of both a linear charger and a pulse charger. The ISL9203 features charge current thermal foldback to guarantee safe operation when the printed circuit board is space limited for thermal dissipation. Additional features include preconditioning of an over-discharged battery, automatic recharge, and thermally enhanced DFN package. Features Pb-Free Available (RoHS Compliant) Complete Charger for Single-Cell Li-ion Batteries Very Low Thermal Dissipation Integrated Pass Element and Current Sensor No External Blocking Diode Required 1% Voltage Accuracy Programmable Current Limit up to 1.5A Charge Current Thermal Foldback Accepts Multiple Types of Adapters Guaranteed to Operate at 2.65V After Start Up Ambient Temperature Range: -20°C to 70°C Thermally-Enhanced DFN Packages Applications...