Power converter and control method thereof
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United States of America Patent
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Oct 26, 2017
app pub date -
Apr 10, 2017
filing date -
Apr 20, 2016
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Abstract
A control method of a power converter including a first stage converter and a second stage converter is provided. The first stage converter converts an input voltage into an intermediate voltage. The second stage converter converts the intermediate voltage into an output voltage to power a load. If a loading amount of the load is larger than a first threshold value, the intermediate voltage is adjusted to increase a voltage difference between the intermediate voltage and the output voltage, so that a change of the intermediate voltage is in a negative correlation with a change of the loading amount. If the loading amount is smaller than a second threshold value, the intermediate voltage remains be unchanged or the intermediate voltage is adjusted, so that the change of the intermediate voltage is in positive correlation with the change of the loading amount.
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