Control device of a power conversion circuit
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United States of America Patent
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Jan 10, 2017
Grant Date -
Jun 4, 2015
app pub date -
May 31, 2013
filing date -
May 31, 2012
priority date (Note) -
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Abstract
In a control device of a power converter circuit repeating accumulation of energy to an inductor and release of energy from the inductor at each turn on/turn off timing of a switch, a zero cross detecting circuit detects a time when a current flowing through the inductor becomes zero by inputting a voltage between both terminals of the inductor directly without any resistance for detecting the inductor current. There is no electricity loss caused by the resistance for detecting the inductor current and critical mode control of the power converter circuit is precisely carried out.
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