Secondary Side Serial Resonant Full-Bridge DC/DC Converter
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United States of America Patent
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Issued Date -
Jun 5, 2014
app pub date -
Nov 30, 2012
filing date -
Nov 30, 2012
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a secondary side serial resonant full-bridge DC/DC converter, comprising: a transistor full-bridge unit, a transformer unit, a resonant unit, a rectifying unit, and an output unit. Particularly, in the present invention, a resonant inductor and a resonant capacitor of the resonant unit and a load resistor of the output unit constitute a serial resonant circuit having a serial resonant frequency; therefore, when the circuit frequency is operated on the serial resonant frequency, the resonant inductor impedance would be offset by the resonant capacitor impedance, such that the circuit is operated in the zero current switch (ZCS) region, and the output voltage variation can be controlled in ±0.2%. Moreover, through the serial resonant circuit, the issue about the resonant components hard to be designed due to their small characteristic impedance can simultaneously be improved.
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