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:
Mar. 17, 2009
Filed:
Nov. 30, 2006
Don Sik Kim, Kyungki-do, KR;
Sug Chin Sakong, Seoul, KR;
Sung Soo Hong, Kyungki-do, KR;
Chung Wook Roh, Seoul, KR;
Sang Kyoo Han, Daejeon, KR;
Young Seung Roh, Kyungki-do, KR;
Kwang Seung Cho, Kyungki-do, KR;
Don Sik Kim, Kyungki-do, KR;
Sug Chin Sakong, Seoul, KR;
Sung Soo Hong, Kyungki-do, KR;
Chung Wook Roh, Seoul, KR;
Sang Kyoo Han, Daejeon, KR;
Young Seung Roh, Kyungki-do, KR;
Kwang Seung Cho, Kyungki-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, Kyungki-Do, KR;
Abstract
Provided is a flyback DC/DC converter for a power supply. In the flyback DC/DC converter, a flyback driver unit provides a primary current. A transformer includes a plurality of secondary coils for inducing energy from the primary coil receiving the primary current. A rectifier unit includes a plurality of rectifier diodes for rectifying secondary currents of the corresponding secondary coils of the transformer. A plurality of clamp diodes are connected in series to the corresponding rectifier diodes of the rectifier unit in a forward direction to clamp ringing voltage across the corresponding rectifier diodes when the power switch is turned off. Accordingly, the voltage across the rectifier diode on the secondary side can be reduced such that it is lower than the output voltage. Also, it is possible to remove the ringing voltage of the rectifier diode and to enhance the efficiency of the flyback DC/DC converter.