Synchronous rectification switching regulator, control...

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

Reexamination Certificate

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Details

C323S284000, C323S285000, C323S908000

Reexamination Certificate

active

07990121

ABSTRACT:
A synchronous-rectification-type switching regulator is disclosed that includes a first switching element; an inductor charged with a voltage input to an input terminal of the switching regulator by the switching of the first switching element; a second switching element for synchronous rectification performing switching so as to discharge the inductor; a control circuit part controlling the switching of the first switching element so that an output voltage from an output terminal of the switching regulator is a predetermined constant voltage, and to cause the second switching element to perform the switching inversely to the first switching element; and a reverse current prevention circuit part interrupting a current that flows into the second switching element by cutting off the connection of the second switching element so as to prevent generation of a reverse current that flows in the direction of the second switching element from the output terminal.

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Feb. 5, 2009 Korean official action (and English translation thereof) in connection with a counterpart Korean patent application No. 10-2007-7016551.
Apr. 9, 2010 European search report in connection with counterpart European patent application No. 06 83 2689.

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