Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2005-06-28
2005-06-28
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
C363S127000
Reexamination Certificate
active
06912143
ABSTRACT:
The present invention proposes a synchronous rectifier with burst mode control. A synchronous rectifier includes a transformer having a primary winding electrically connected to a power source, a secondary winding, a first auxiliary winding, and a second auxiliary winding, a first switch and a second switch electrically connected to the secondary winding and control terminals of the first switch and the second switch individually connected to the first and second auxiliary windings for being either self-driven directly from voltages of the auxiliary windings, a third switch electrically connected between the first switch and the first auxiliary winding in series, a fourth switch electrically connected between the second switch and the second auxiliary winding in series, a detecting circuit electrically connected to an output terminal of the synchronous rectifier for detecting a load status, and a control circuit electrically connected to the detecting circuit for enabling the third switch and the fourth switch when the load status is at a heavy load and disabling the third switch and the fourth switch when the load status is at a light load.
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Chen Yi
Gan Hong-Jian
Huang Yao-Jian
Zhang Alpha J.
Berhane Adolf
Delta Electronics , Inc.
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