Overcurrent protection for switching mode power converter
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United States of America Patent
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-
May 22, 1990
Issued Date -
N/A
app pub date -
Oct 6, 1987
filing date -
Apr 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for decreasing the minimum duty ratio of a switching element in a power converter in response to a signal indicating that sensed current exceeds a second threshold. The circuit turns off the switching element when the sensed current exceeds a first threshold. The minimum duty ratio may be decreased, for example by increasing the period of the switching element or by increasing the 'off' time of the switching element. The circuit protects against current runaway.
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