LTC1731ES8-4.1

Battery Charger Controller Li-Ion/NiCD/NiMH 500mA 4.1V 8Pin SOIC N

DESCRIPTION

The LTC®1731 is a complete constant-current/constant voltage linear charger controller for single cell lithium-ion batteries. Nickel-cadmium NiCd and nickel-metal-hy dride NiMH batteries can also be charged with constant current using external termination. The external sense resistor sets the charge current with 5% accuracy. An internal resistor divider and precision reference set the final float potential with ±1% accuracy. The output float voltage is set internally to 4.1V LTC1731-4.1 or 4.2V LTC1731-4.2.

FEATURES

■ Complete Linear Charger Controller for 1-Cell Lithium-Ion Batteries

■ 1% Voltage Accuracy

■ Programmable Charge Current

■ C/10 Charge Current Detection Output

■ Programmable Charge Termination Timer

■ Space Saving 8-Pin MSOP Package

■ Automatic Sleep Mode When Input Supply is Removed 7µA Battery Drain

■ Automatic Trickle Charging of Low Voltage Cells

■ Programmable for Constant-Current-Only Mode

APPLICATIONS

■ Cellular Phones

■ Handheld Computers

■ Charging Docks and Cradles

■ Programmable Current Source