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. 30, 2012
Filed:
Jul. 10, 2009
Yungtaek Jang, Cary, NC (US);
Milan M. Jovanovic, Cary, NC (US);
Yi-hsin Leu, ChungliIndustrial Zone, TW;
Ming-tsung Hsieh, Chungli Industrial Zone, TW;
Wei-hsin Wen, Chungli Industrial Zone, TW;
Chi-hsing Huang, Chungli Industrial Zone, TW;
Yungtaek Jang, Cary, NC (US);
Milan M. Jovanovic, Cary, NC (US);
Yi-Hsin Leu, ChungliIndustrial Zone, TW;
Ming-Tsung Hsieh, Chungli Industrial Zone, TW;
Wei-Hsin Wen, Chungli Industrial Zone, TW;
Chi-Hsing Huang, Chungli Industrial Zone, TW;
Delta Electronics, Inc., Taipei, TW;
Abstract
A power supply comprises an input voltage detector that detects a drop in input voltage that corresponds to an input voltage loss. A power converter is coupled to the input voltage detector. The power converter, which may be a boost converter or a power factor correction converter, has a switching device that is actuated in accordance with a duty cycle. A duty cycle adjuster is responsive to detection of the drop in the input voltage to adjust the duty cycle of the switching device in order to limit an input current surge through the switching device below a desired level after the input voltage returns.