Description
The U2403B is a monolithic, integrated-bipolar circuit which can be used in applications for time-controlled, constant-current charge. Selection of charge current versus timing is carried out by using the external circuit at Pins 2, 3 and 4. For high current requirement, an external transistor is recommended in series with the battery.

Features
● Easy-to-run autonomous dual rate charger
● Constant charge current
● 3 h – 24 h charge time programmable
● Low cost dc regulator
● Overtemperature protection
● Charge-mode indication
● Operation starts at the moment of battery insertion
● Fast charge time-test mode

Applications
● Cordless telephones
● Low-cost battery-charge timer
● Entertainment