FEATURES
Low Power Dissipation n 2A Maximum Charge Current n No External MOSFETs, Sense Resistor or Blocking Diode Required n Remote Sensing at Battery Terminals n Programmable Charge Termination Timer n Preset 4.1V Float Voltage with ±0.5% Accuracy n 4.1V Float Voltage Improves Battery Life and High Temperature Safety Margin n Programmable Charge Current Detection/ Termination n Automatic Recharge n Thermistor Input for Temperature Qualified Charging n Compatible with Current Limited Wall Adapters n Low Profile 16-Lead (4mm × 4mm) QFN Package n DESCRIPTION
The LTC®4001-1 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. Input short-circuit protection is included so no blocking diode is required. Under these conditions, the reduced float voltage will trade-off initial cell capacity for the benefit of increased capacity retention over the life of the battery.
Linear Technology
