Temperature compensated foldback current limiting
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United States of America Patent
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-
Apr 3, 1990
Grant Date -
N/A
app pub date -
Mar 23, 1988
filing date -
Mar 23, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A current-limiting circuit providing a foldback limiting action which is compensated for the temperature coefficient of the sensing resistor. Temperature compensation and voltage-related signals are combined with a multiplier circuit providing a multiplier output which is compared to the voltage developed across the sense resistor to produce a current control or current limiting indicating signal. One embodiment of the present invention is implemented in a monolithic integrated circuit including an aluminum sense resistor, and the temperature compensation selected to substantially eliminate the effects of the temperature coefficient of the aluminum sense resistor, resulting in a more stable foldback current limiting characteristic over an extended temperature range.
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