Boost converter with short-circuit protection and method thereof
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United States of America Patent
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Mar 6, 2018
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N/A
app pub date -
Jan 9, 2015
filing date -
Jan 10, 2014
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Abstract
A short-circuit protection method for a boost converter is disclosed. In this method, a switch of a switching circuit of the boost converter is turned on and a control voltage with a gradually increasing magnitude is supplied to control a short-circuit protection switch coupled between an input voltage and the switching circuit when the boost converter starts up. Then, a current flowing through the switch is detected and compared with a predetermined value. The switch is turned off and a preset time period is initiated if the current is higher than the predetermined value. It is detected whether a short-circuit event occurs at an output terminal of the boost converter at the end of the preset time period. If the short-circuit event occurs, the short-circuit protection switch is then turned off.
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