Method and apparatus for a high voltage power supply circuit
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United States of America Patent
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May 3, 2011
Grant Date -
Feb 5, 2009
app pub date -
Mar 12, 2008
filing date -
Mar 23, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control circuit for use in a power supply is disclosed. An example control circuit according to aspects of the present invention includes a signal generator coupled to generate an output signal to control switching of a power switch to be coupled to the control circuit. A feedback circuit is coupled to receive a feedback signal, which is representative of an output of the power supply during a feedback portion of an off time of the power switch. The signal generator generates the output signal in response to the feedback circuit to control a fraction of the feedback portion of the off time of the power switch that the feedback signal is above a threshold and another fraction of the feedback portion of the off time of the power switch that the feedback signal is below the threshold.
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