Power distribution switch circuits with fast responses to hard short-circuits
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United States of America Patent
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Oct 19, 2010
Grant Date -
Mar 4, 2010
app pub date -
Aug 26, 2008
filing date -
Aug 26, 2008
priority date (Note) -
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Abstract
Methods and apparatus to provide power distribution switch circuits with fast responses to hard short-circuits are disclosed. In one example, a power distribution switch to detect a hard short-circuit condition is described, comprising a switching device having a resistance between an input terminal and an output terminal, to conduct a current from an input power source having an input voltage to an output terminal having an output voltage, a voltage feedback loop having a digital output voltage to increase the resistance of the switching device in response to a short-circuit based on the output voltage, and an analog current feedback loop to increase the resistance of the switching device based on a current through the switching device and a reference current.
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