Switching power supply device
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United States of America Patent
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Jan 23, 2018
Issued Date -
N/A
app pub date -
May 2, 2017
filing date -
Jun 16, 2016
priority date (Note) -
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Abstract
The present invention provides, in one aspect, a restart timer that turns a switching element ON when it is not possible to turn the switching element ON via a zero-current detection and frequency reduction part, and specifically includes: a frequency reduction part that reduces a switching frequency of the switching element by delaying the turn-ON timing of the switching element by the zero-current detection and frequency reduction part when a light load state is detected; and a timer adjustment part that lengthens the restart time of the restart timer by synchronizing with the turn-ON timing of the switching element that was delayed by the frequency reduction part.
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