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AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsKimikazu Nakamura, Tsuyoshi Yamashita, Yuji Hayashi
Estimating the term…
The control apparatus for controlling a voltage transforming apparatus having a transformer, power switching elements disposed in a primary side, and synchronous-rectifying switching elements disposed in a secondary side includes a judging circuit making a judgment as to whether or not an output current of the voltage transforming apparatus is smaller than a specified current on the basis of a primary-side current of the transformer and an inhibition circuit inhibiting the synchronous-rectifying switching elements from performing their synchronous-rectifying control operation when the judging circuit judges that the output current is smaller than the specified current. The judging circuit makes the judgment on the basis of the primary-side current flowing through the primary coil of the transformer immediately before the power switching elements are turned off.
A control apparatus for controlling a voltage transforming apparatus including a transformer, power switching elements provided in a primary side of said transformer and performing on-operation and off-operation to invert a DC input voltage to an AC voltage, a synchronous-rectifying switching elements provided in a secondary side of said transformer and performing synchronous-rectifying control operation in synchronization with said power switching elements in order to rectify said AC voltage transformed by said transformer into a DC output voltage, and a smoothing circuit smoothing said DC output voltage, said control apparatus comprising:
Dependencies are inferred from the claim text.