NCP1835

NCP1835 Integrated Li-Ion Charger NCP1835 is an integrated linear charger specifically designed to charge 1−cell Li−Ion batteries with a constant current, constant voltage (CCCV) profile. It can charge at currents of up to 1.0 A. Its low input voltage capability, adjustable charge current, ability to maintain regulation without a battery, and its onboard thermal foldback make it versatile enough to charge from a variety of wall adapters. The NCP1835 can charge from a standard voltage−source wall adapter as a CCCV charger, or from a current limited adapter to limit power dissipation in the pass device. Features Integrated Voltage and Current Regulation No External MOSFET, Sense Resistor or Blocking Diode Required Charge Current Thermal Foldback Integrated Pre−charge Current for Conditioning Deeply Discharged Battery Integrated End−of−Charge (EOC) Detection 1% Voltage Regulation 4.2 V or 4.242 V Regulated Output Voltage Regulation Maintained without a Battery Present Programmable Full Charge Current 300 − 1000 mA Open−Drain Charger Status and Fault Alert Flags 2.8 V Output for AC Present Indication and Powering Charging Subsystems Minimum Input Voltage of 2.4 V Allows Use of Current Limited Adapters Automatically Recharging if Battery Voltage Drops after Charging Cycle is Completed Low Profile 3x3 mm DFN Package Pb−Free Packages are Available Typical Applications Cellular Phones PDAs, MP3 Players Stand−Alone Chargers Battery Operated Devic...