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NCP1835
Integrated Li-Ion Charger
NCP1835
Integrated Li-Ion ChargerNCP1835 is an integrated linear charger specifically designed tocharge 1−cell Li−Ion batteries with a constant current, constantvoltage (CCCV) profile. It can charge at currents of up to 1.0 A. Its low input voltage capability, adjustable charge current, abilityto maintain regulation without a battery, and its onboard thermalfoldback make it versatile enough to charge from a variety of walladapters. The NCP1835 can charge from a standard voltage−sourcewall 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 ChargingSubsystems Minimum Input Voltage of 2.4 V Allows Use of Current LimitedAdapters Automatically Recharging if Battery Voltage Drops after ChargingCycle 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 Devices
