Systems and methods for dynamic threshold adjustment with primary-side sensing and regulation for flyback power converters
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United States of America Patent
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Jun 28, 2016
Grant Date -
Aug 2, 2012
app pub date -
Mar 21, 2011
filing date -
Feb 1, 2011
priority date (Note) -
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Abstract
System and method for adjusting a threshold of a power conversion system. The system includes a threshold generator configured to receive a first signal and generate a threshold signal based on at least information associated with the first signal, a comparator configured to receive the threshold signal and a second signal and generate a comparison signal, and a gate driver configured to generate a drive signal based on at least information associated with the comparison signal. The gate driver is coupled to at least a switch configured to receive the drive signal and affect a current flowing through a primary winding coupled to a secondary winding. If the second signal is larger than the threshold signal in magnitude, the drive signal causes the switch to open. The drive signal is associated with a switching frequency.
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