U2400B

U2400B Charging of Batteries with Automatic Pre-Discharge Description The monolithic integrated circuit, U2400B, is a bipolar circuit, designed for automatic recharging of NiCd/ NiMH batteries. It has controlled and defined charging characteristics for various charging sequences with *subsequent trickle charge operation. The long life *Memory Effect of the recharging cell remains intact. Features D Three time selections: 0.5 h, 1 h or 12 h with subsequent trickle charge operation D Battery temperature and contact monitoring D Charging interrupt for overvoltage or excessive temperature D Automatic pre-discharge possible D Separate charge- and discharge outputs D Pulse-width modulation facility of charge- and discharge current for matching to transformer or battery data D Timer clock via mains or internal oscillator D Reference voltage source D LED-status output for mode indication Case: DIP16, SO16L 8 14 16 0.5 Hz 94 9375 11 Mains supply 7 Reference Open Ref on off Test logic Mains synchronization 1 3 200 Hz Oscillator – 2+ Control unit PWM Time Status Discharge Reset 13 Ref 12 h GND 1 h Charge time selection Open 0.5 h Failure – charge mode II Continue Alternating 15 Ref charging red / green I Stop Red Open charging indicator Status display output 9 Charge Start Stop Charge output 12 Discharge stop 0.53 V + –6 0.53 V + – Sensor monitoring 5 + – 2.95 V Event counter Vmax 0.53 V – +4 Battery contact monitoring – + 0.18 V 10 Discharge out...