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Auto-Programmable Over-Current Power Supply Detection Circuit

IP.com Disclosure Number: IPCOM000039908D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Riggio, SR Steinmetz, MJ [+details]

Abstract

A technique is described whereby an electronic sense circuit provides detection of output current amperage which exceeds the allowable load- operating range of a power supply. This detection is accomplished without momentarily driving the output current to its catastrophic limit before a shut-down occurs. The concept is unique in that it is automatically programmable to take into account variations in loads, that can occur when computer configurations change, as in the addition of feature cards to increase the function of the computer. In prior art, over-current protection of power supplies was accomplished by using a hysteresis or threshold comparator circuit. The trip point was usually set slightly above the maximum operating current value.