The KF5420A is a highly The KF5420A is a highly constant-current/ constant voltage linear charger for cell lithium-ion batteries. Its package and low external component count make the KF5420A ideally suited for portable applications. The charge current can be programmed externally with a single resistor, which may be programmed

up to 1A. KF5420A determines the charge mode by detecting the battery voltage: Pre-charge, constant current charging， constant voltage charging. The charge current of Opre-charging and constant - current charging is adjustable. The KF5420A is monitored by temperature monitor during the constant-current and constant-voltage charging. There are two LEDs indicate the charge mode.

The KF5420A is available in the SOP-8L package.

      Features

Preset 8.4V Charge Voltage with 1% Accuracy

Programmable Charge CurrentUp to 1A

Input Voltage:9-10V DC

Pre-Charging, the Charge Current is adjustable

Ideal for Dual-Cell (8.4V) Li-lon Batteries

Constant -Current Charging, the Charge

Current is adjustable

Constant-Voltage Charging

Constant-Current/Constant-Voltage

Charging with Temperature Monitoring

Automatic Recharge

Double LEDs Charge Status Indication

Available in SOP-8L Package

     Application

Charger for Li-lon Coin Cell Batteries

Bluetooth Applications

Portable MP3 Players, Wireless Headsets