Battery Charge Controllers | NCP1835

1.0 A One-Cell Lithium-ion/Polymer Battery Charger

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Overview

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.

  • Integrated Voltage and Current Regulation
  • No External MOSFET, Sense Resistor or Blocking Diode Required
  • Charge Current Thermal Foldback
  • Integrated Precharge 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
  • OpenDrain Charger Status and Fault Alert Flags
  • OpenDrain Charger Status and Fault Alert Flags
  • Minimum Input Voltage of 2.4 V Allows Use of Current Limited Adapters
  • Automatically Recharging if Battery Voltage Drops after Charging Cycle is Completed
  • Pb-Free Packages are Available
  • Cellular Phones, PDAs, MP3 Players, Battery Operated Devices

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