ACE4702

2 Cell Li-ion Battery Charger IC

VER 1.1

1

Description

The ACE4702 is a PWM switch-mode lithium ion battery charger controller for 2 cell li-ion battery in a

small package using few external components.

The ACE4702 is specially designed for charging lithium ion battery with constant current and constant

voltage mode. In constant voltage mode, the regulation voltage is fixed at 8.4V with ±1% accuracy. The

constant charging current is programmable with a single sense resistor.

Deeply discharged batteries are automatically trickle charged at 15% of the programmed constant

charging current until the cell voltage exceeds 2.8V/cell. The charge cycle is terminated once the charging

current drops to a level set by an on-chip resistor and an external resistor, and a new charge cycle

automatically restarts if the battery voltage falls below 4V/cell. ACE4702 will automatically enter sleep

mode when input voltage is lower than battery voltage.

Other features include undervoltage lockout, battery temperature monitoring and status indication, etc.

ACE4702 is available in a space-saving 16-pin TSSOP package.

Features

Application