Description
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. The recommended charge current rate is 30-300 mA.
- Integrated Voltage and Current Regulation
- No External MOSFET, Sense Resistor or Blocking Diode Required
- Charge Current Thermal Foldback
- Integrated Precharge 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 Charge 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
- Battery Powered Devices
- Pb-Free Package is Available
