DC to DC converter and DC to DC conversion system
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United States of America Patent
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Apr 19, 2016
Grant Date -
Sep 3, 2015
app pub date -
Feb 2, 2015
filing date -
Feb 28, 2014
priority date (Note) -
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Abstract
The present disclosure discloses a DC/DC converter and a DC/DC conversion system. The DC/DC converter includes a transformer, a primary power circuit, a secondary bridge synchronous rectifying circuit, an output inductor and a control circuit. The primary power circuit receives an input voltage, and deliver a symmetrical power flow to a secondary side of the transformer during positive and negative switching cycles, and a magnetic flux in the transformer core is balanced through the above symmetrical power flow. The rectifying circuit is coupled to a secondary winding of the transformer. The control circuit provides primary and secondary driving signals to the primary power circuit and the rectifying circuit, respectively. When an output voltage of the primary power circuit is zero, the control circuit controls the first, the second, the third and the fourth switches to be conductive.
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