FEATURES • Internal High Voltage MOSFET • Up to 12V Input Voltage • ±0.5% Output Voltage Accuracy • Charge Current Thermal Foldback • Programmable Termination Voltage • Programmable Fast Charge Current • Programmable Charging Timer • No Blocking Diode Required • Low Reverse Leakage • Preconditioning for Deeply Depleted Battery • Low Quiescent Current Standby Mode • Space-Saving, Thermally-Enhanced SOP-8/EP, TDFN33-8 APPLICATIONS • Mobile Phone • Wireless Headsets • Portable Media Players • Cradle Chargers • Portable Devices GENERAL DESCRIPTION The ACT3704 is a complete linear charging solution for single cell Lithium Ion and Lithium Polymer batteries. It incorporates an internal 12V power MOSFET for Constant-Current, Constant-Voltage control (CC/CV). The battery regulation voltage accuracy is ± 0.5% and can be set to either 4.1V or 4.2V. The charge current is programmed with an external resistor to a maximum of 1A to minimize total charge time. The reverse leakage current from the battery is less than 1μA if the input adaptor is disconnected or if there is a reverse battery connection. The ACT3704 is available in thermally-enhanced SOP-8/EP, and TDFN33-8 packages to accommodate high charge current operation and minimize total charging time.
