Power supply and image forming apparatus
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United States of America Patent
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Jun 2, 2015
Grant Date -
May 2, 2013
app pub date -
Oct 26, 2012
filing date -
Nov 1, 2011
priority date (Note) -
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Abstract
In a power supply, a synchronous rectification switch rectifies a pulse voltage, and a current-voltage conversion unit converts a current on a voltage-input side of the synchronous rectification switch to a first voltage and converts a current on a voltage-output side of the synchronous rectification switch to a second voltage. A switching unit switches an operation state of the synchronous rectification switch based on a result of a comparison between the first voltage and the second voltage converted by the current-voltage conversion unit. A state holding unit holds an off state after the synchronous rectification switch is turned off by the switching unit.
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