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UC2543DW
Power Supply Supervisory Circuit
DESCRIPTION fault before
Current Sensing Circuits collector•
Internal 1% Accurate Reference wire-or’ed
directly•
Programmable Time Delayscircuit,•
SCR “Crowbar” Driveof 300 mA other•
Remote Activation Capability circuit latch and
reset capability.•
Optional Over-Voltage Latch Uncommitted Comparator Inputs for have the
Voltage (UC1544 Series Only) inputs levels
2.5V maybe monitoredby dividing down the
reference voltage. current sense circuitThe monolithic integrated circuits contain all the used with external compensationasa linearfunctions necessaryto monitor and control the output orasa highgain comparator. Although nominallyof a sophisticated power supply system. for zero input offset,a fixed threshold mayOver-voltage (O.V.) sensing with provisionto trigger with an external resistor. Insteadof currentan external SCR “crowbar” shutdown; an this circuit may alsobe usedasan additionalundervoltage (U.V.) circuit which can be either theor the anda third amp/comparatorcurrent sensing (C.L.) areall includedin this
the entiretogether with an independent, accurate reference
the outputgenerator.
voltage.
