Switching-mode power supplies and control methods thereof
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United States of America Patent
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Dec 8, 2015
Grant Date -
Feb 7, 2013
app pub date -
Sep 24, 2011
filing date -
Aug 4, 2011
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Abstract
Disclosed include switching-mode power supplies and control methods thereof. A disclosed switching-mode power supply is coupled to an input power node and a ground node, comprising a controller, a first inductor, and a bootstrap circuit. The controller is for controlling a power switch coupled to the input power node and a connection node. The controller is powered by the connection node and an operation power node. The first inductor is coupled between the connection node and a discharge node. The bootstrap circuit is coupled between the discharge node, the operation power node and the connection node, to make an operation voltage at the operation power node substantially not less than a discharge voltage at the discharge node. The discharge node is coupled to power an output load.
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