CONSTANT POWER AVAILABILITY FOR LOAD SWITCHES WITH FOLDBACK CURRENT

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United States of America Patent

APP PUB NO 20150130433A1
SERIAL NO

14535617

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Abstract

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Load switch supply circuits and methods are provided that allow a load switch to maintain power delivery without having the load switch encounter thermal or power overload conditions. In an example, a load switch supply circuit can include a multiplier circuit configured to receive a first representation of voltage across a load switch and a representation of current provided by the load switch and to provide a representation of power dissipated by the load switch, and a control amplifier configured to compare the representation of power dissipated by the load switch to a power threshold and to adjust a control terminal of the load switch to avoid cycling the load switch to an off state due to thermal overload or power overload conditions.

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Patent Owner(s)

Patent OwnerAddress
FAIRCHILD SEMICONDUCTOR CORPORATION5005 E MCDOWELL ROAD MAILDROP A700 PHOENIX AS 85008

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jasa, Hrvoje Scarborough, US 25 202
Macaluso, Steven Scarborough, US 9 28

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