Control circuit of power converter having adaptive bias for detecting reflected voltage of transformer

A control circuit for detecting the reflected voltage of a transformer is provided. A detection circuit is developed for sampling the reflected voltage. Because the pulse width of the reflected voltage is narrower at light load, a bias circuit is utilized for producing a bias signal to help the refl...

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Bibliographic Details
Main Authors Yang, Ta-yung, Li, Chuh-Ching, Tsao, Feng Cheng
Format Patent
LanguageEnglish
Published 17.02.2009
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Summary:A control circuit for detecting the reflected voltage of a transformer is provided. A detection circuit is developed for sampling the reflected voltage. Because the pulse width of the reflected voltage is narrower at light load, a bias circuit is utilized for producing a bias signal to help the reflected voltage detection. Furthermore, a blanking circuit ensures a minimum pulse width of the reflected voltage.