Switching power supply apparatus with blanking pulse generator
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United States of America Patent
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-
Jul 5, 2005
Grant Date -
Jul 15, 2004
app pub date -
Dec 22, 2003
filing date -
Dec 25, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switching power supply apparatus is provided, wherein an optimal blanking interval can be obtained for an entire load range. The switching power supply apparatus is configured such that an on-blanking pulse signal generating circuit 31 generates a blanking pulse signal based on an error voltage signal VEAO, and sets a blanking interval that corresponds to the load condition. For example, the reference voltage and the voltage value of the error voltage signal VEAO are compared and the blanking pulse signal that shortens the blanking interval is generated during a light load, that is, when the voltage value of the error voltage signal VEAO is less than or equal to the reference voltage.
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