U2403B - TEMIC Semiconductors

U2403B Charge Timer

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. To protect the IC agai.

Features

D D D D D D D D 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 D Cordless telephones D Low-cost battery-charge timer D Entertainment Package: DIP8, SO8 Block Diagram R1 Power supply AC/DC LED2 Battery inserted Charge R5 LED 8 Charge mode indicator LED1 Ready VS 6 Power supply VS = 3.5 to 12 V GND 7 Test mode 5 STM 94 8629 C1 í max 140°C 1 V1 Timer and control logic VRef = 1.