The LTC4001EUF-1 is a 2A Li-Ion battery charger intended for 5V wall adapters. It utilizes a 1.5MHz synchronous buck converter topology to reduce power dissipation during charging. Low power dissipation, an internal MOSFET and sense resistor allow a physically small charger that can be embedded in a wide range of handheld applications. The LTC4001EUF-1 includes complete charge termination circuitry, automatic recharge and a ±1% 4.2V float voltage. Input short-circuit protection is included so no blocking diode is required.
Battery charge current, charge timeout and end-of-charge indication parameters are set with external components. Additional features include shorted cell detection, temperature qualified charging and overvoltage protection. The LTC4001EUF-1 is available in a low profile (0.75mm) 16-lead (4mm × 4mm) QFN package.
Float VoltageLTC40014.2VLTC4001-14.1VApplications- Handheld Battery-Powered Devices
- Handheld Computers
- Charging Docks and Cradles
- Digital Cameras
- Smart Phones
Feature
- Low Power Dissipation
- 2A Maximum Charge Current
- No External MOSFETs, Sense Resistor or Blocking Diode Required
- Remote Sensing at Battery Terminals
- Programmable Charge Termination Timer
- Preset 4.2V Float Voltage with ±0.5% Accuracy
- Programmable Charge Current Detection/Termination
- Automatic Recharge
- Thermistor Input for Temperature Qualified Charging
- Compatible with Current Limited Wall Adapters
- Low Profile 16-Lead (4mm × 4mm) QFN Package
Applications
- Handheld Battery-Powered Devices
- Handheld Computers
- Charging Docks and Cradles
- Digital Cameras
- Smart Phones
(Picture: Pinout)
