SWITCHING CONTROL CIRCUIT AND POWER SUPPLY APPARATUS
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United States of America Patent
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Issued Date -
Jun 2, 2011
app pub date -
Nov 29, 2010
filing date -
Nov 27, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A switching control circuit includes: a drive circuit configured to turn on/off a transistor according to a duty ratio of a drive signal so as to generate an output voltage of a target level from an input voltage, the transistor configured to be applied with the input voltage at an input electrode thereof; and a drive signal generation circuit configured to change the duty ratio of the drive signal based on a reference voltage and a feedback voltage corresponding to the output voltage, to generate the drive signal having the duty ratio which is changed so that the feedback voltage becomes equal in level to the reference voltage, and which is changed so that the output voltage is reduced with a rise in temperature.
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