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UC1543, UC1544 UC2543, UC2544 UC3543, UC3544
SLUS188A – APRIL 1997 – REVISED FEBRUARY 2007
Power Supply Supervisory Circuit
FEATURES
• Includes Over-Voltage, Under-Voltage, and Current Sensing Circuits
• Internal 1% Accurate Reference • Programmable Time Delays • SCR “Crowbar” Drive of 300 mA • Remote Activation Capability • Optional Over-Voltage Latch • Uncommitted Comparator Inputs for Low
Voltage Sensing (UC1544 Series Only)
DESCRIPTION
The monolithic integrated circuits contain all the functions necessary to monitor and control the output of a sophisticated power supply system. Over-voltage (O.V.) sensing with provision to trigger an external SCR “crowbar” shutdown; an undervoltage (U.V.
UC3543 Datasheet
