High speed, large-current power control apparatus
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United States of America Patent
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Jun 10, 1997
Grant Date -
N/A
app pub date -
Apr 26, 1996
filing date -
Apr 27, 1995
priority date (Note) -
Expired
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Abstract
A power control apparatus for protecting an electrical circuit from excessive current and in particular for protecting it from a large and fast transition pulse caused by a rapid current polarity transition. At least two switching devices are coupled in series or in parallel between a power supply and a load. A gate signal is generated to change the switching devices from conductive state to nonconducting state in response to detection of an excessive current state. The gate signal is delayed by a predetermined period of time to change the switching devices into the nonconducting state after all of the switching devices are saturated so that the rapid current polarity transition is eliminated.
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