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.

Date of Patent:
Jan. 17, 2006

Filed:

Jun. 18, 2003
Applicants:

Hongjian Gan, Taoyuan, TW;

Sen Dou, Tainan, TW;

Alpha J. Zhang, Taoyuan, TW;

Alex Jong, Taoyuan, TW;

Chanwit Prasantanakorn, Samutprakarn, TH;

Inventors:

Hongjian Gan, Taoyuan, TW;

Sen Dou, Tainan, TW;

Alpha J. Zhang, Taoyuan, TW;

Alex Jong, Taoyuan, TW;

Chanwit Prasantanakorn, Samutprakarn, TH;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/217 (2006.01);
U.S. Cl.
CPC ...
Abstract

A cost effective circuit improves the cross regulation of multiple outputs converter, especially for that output chokes are coupled and a synchronous rectifier is applied to one of the outputs. A DC/DC converter includes a transformer having a primary winding and two secondary windings. The first secondary winding is coupled to a synchronous rectifier and a first output choke. The second secondary winding is coupled to a diode rectifier and a second output choke. The first output choke and the second output choke are coupled. A low power MOSFET switch is added to the diode rectifier for avoiding the diode rectifier operating in DCM when light loaded.


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