Secondary winding sense for hard switch detection
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United States of America Patent
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Oct 6, 2020
Grant Date -
N/A
app pub date -
Dec 13, 2018
filing date -
Dec 13, 2018
priority date (Note) -
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Abstract
A controller for use in a power converter includes a control loop clock generator that is coupled to generate a switching frequency signal in response to a sense signal representative of a characteristic of the power converter, a load signal responsive to an output load of the power converter, and a hard switch sense output. A hard switch sense circuit is coupled to generate the hard switch sense output in response to the switching frequency signal and a rectifier conduction signal that is representative of a polarity of an energy transfer element of the power converter. A request transmitter circuit is coupled to generate a request signal in response to the switching frequency signal to control switching of a switching circuit coupled to an input of the energy transfer element of the power converter.
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