NCP1835B

NCP1835B Integrated Li−Ion Charger NCP1835B is an integrated linear charger specifically designed to charge 1−cell Li−Ion batteries with a constant current, constant voltage (CCCV) profile. 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 NCP1835B can charge from a standard wall adapter or from the USB port. It has been optimized to charge low capacity batteries such as those found in wireless headsets and flash memory−based MP3 players. 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 a Deeply Discharged Battery Integrated End−of−Charge (EOC) Detection 1% Voltage Regulation 4.2 V Regulated Output Voltage Regulation Maintained without a Battery Present Programmable Full Charge Current 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 Package is Available Typical Applications Wireless Headsets MP3 Players USB Appliances Battery Operated Devices http://onsemi.com MARKING DIAGR...