Control device for resonant converters
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United States of America Patent
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Jul 8, 2014
Grant Date -
Apr 14, 2011
app pub date -
Oct 12, 2010
filing date -
Oct 12, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A control device for a switching circuit of a resonant converter having a direct current at the output, the switching circuit having at least one half bridge of at least first and second transistors connected between an input voltage and a reference voltage. The half bridge is adapted to generate a periodic square wave voltage to drive the resonant circuit of the resonant converter; The control device has a circuit to proportionally generate a first voltage to a switching period, and a circuit adapted to limit the voltage at the ends of a capacitor between a reference voltage and the first voltage, and a further circuit structured to control the switching off of a first or second transistor at the time instant in which the voltage across the capacitor has reached the first voltage.
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