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:
Sep. 04, 2012
Filed:
Apr. 15, 2009
Shanmei LI, Gyeonggi-do, KR;
Jin-tae Kim, Seoul, KR;
Gwan-bon Koo, Gyeonggi-do, KR;
Gyoung-soo Park, Seoul, KR;
Shanmei Li, Gyeonggi-do, KR;
Jin-Tae Kim, Seoul, KR;
Gwan-Bon Koo, Gyeonggi-do, KR;
Gyoung-Soo Park, Seoul, KR;
Fairchild Korea Semiconductor Ltd., Bucheon, Kyungki-Do, KR;
Abstract
A converter is provided including: a first switch; an energy transmitting element for converting input energy into output energy according to the switching of the first switch; and a switching controller for detecting a time when a voltage between a first terminal and a second terminal of the first switch reaches a valley of a resonance waveform, and actuating the first switch corresponding to one of the detected valleys of the resonance waveform. The switching controller includes: a valley detector for changing the state of the output signal whenever a voltage between a first terminal and a second terminal of the first switch reaches a valley of the resonance waveform; and a PWM controller for actuating the first switch corresponding to an output signal of the valley detector.