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:
Oct. 28, 2003
Filed:
Dec. 03, 2001
Applicant:
Inventors:
Hongjian Gan, Taoyuan Shien, TW;
Zhongwei Ke, Taoyuan Shien, TW;
Chaoqun Sun, Taoyuan Shien, TW;
Alpha J. Zhang, Taoyuan Shien, TW;
Assignee:
Delta Electronics, Inc., Taoyuan Shien, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 ; H02H 7/122 ;
U.S. Cl.
CPC ...
H02M 3/335 ; H02H 7/122 ;
Abstract
A constant voltage reset circuit used in a forward converter for the holdup time requirement or the wide input voltage range is disclosed. In one embodiment, the constant voltage reset circuit comprises a reset capacitor, a parallel-coupled switch, and a diode coupled in series with the reset capacitor which is configured to cooperate therewith to reset an energy from the transformer. The forward converter employing the reset circuit or the method achieves a higher efficiency with a larger turn ratio and without the 50% limitation of maximum duty cycle.