The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2008
Filed:
Jun. 14, 2004
Hiroshi Usui, Niiza, JP;
Ryuichi Furukoshi, Niiza, JP;
Yukinari Fukumoto, Niiza, JP;
Sanken Electric Co., Ltd., Saitama, JP;
Abstract
A synchronous commutation DC-DC converter comprises a current detection transformer () for detecting currents (I, I) flowing through the primary circuit, first and second DC bias power sources () generating bias voltages (V, V) larger than the voltage corresponding to the exciting current of a transformer (), and first and second comparators () for driving first and second commutation MOS-FETs () when the detection voltage (V) of a current detection resistor () exceeds the bias voltages (V, V) of the first and second DC bias power sources (). Since each commutation MOS-FET () in the secondary circuit is driven in synchronism with the currents (I, I) of the primary circuit from which the exciting current component of the transformer () is removed, it is possible to minimize switching loss of each commutation MOS-FET () in the secondary circuit and enhance conversion efficiency of the synchronous commutation DC-DC converter.