Boost converter circuit and a method for controlling a boost converter
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United States of America Patent
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Aug 22, 2017
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app pub date -
Sep 8, 2015
filing date -
Jul 1, 2015
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Abstract
A method for controlling a boost converter which generates an output voltage according to an input voltage. The boost converter includes an inductor, a first transistor, a second transistor, and a capacitor. The first transistor is coupled between the inductor and a ground. The second transistor is coupled between the inductor and an output terminal. The capacitor is coupled to both the second transistor and the output terminal. The method includes: charging the capacitor by repeatedly turning on the second transistor within a first time interval; turning on the first transistor and the second transistor by turns according to a first switching frequency within a second time interval; and turning on the first transistor and the second transistor by turns according to a second switching frequency within a third time interval. The first switching frequency is smaller than the second switching frequency.
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