Controlling Method, Power Supply, Power Controller, and Power Controlling Method
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United States of America Patent
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Issued Date -
Mar 21, 2013
app pub date -
Sep 20, 2011
filing date -
Sep 20, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A power supply has an inductor and determines loading state of the power supply according to a compensation signal. When the loading state is determined to be a light loading state or a no-loading state, a switch is operated at a low operating frequency. When the loading state is determined to be a heavy loading state, the switch is operated at a high operating frequency. If the compensation signal exceeds a critical value, it is determined that the loading state is an overloaded state. When the overloaded state continues past a tolerable duration, the switch is turned off. The tolerable duration is determined by an external capacitor and is independent of the operating frequency.
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