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:
Nov. 19, 2013
Filed:
Jul. 14, 2011
Ta-yung Yang, Milpitas, CA (US);
Jung-sheng Chen, Fongshan, TW;
Chuh-ching LI, Jhongli, TW;
Chih-hsien Hsieh, Dacun Township, Changhua County, TW;
Ta-yung Yang, Milpitas, CA (US);
Jung-Sheng Chen, Fongshan, TW;
Chuh-Ching Li, Jhongli, TW;
Chih-Hsien Hsieh, Dacun Township, Changhua County, TW;
System General Corp., Taipei Hsien, TW;
Abstract
A control circuit for power converter according to the present invention comprises a PWM circuit generating a switching signal coupled to switch a transformer of the power converter. A feedback input circuit is coupled to an output of the power converter for generating a feedback signal. The feedback signal is coupled to turn off the switching signal. A detection circuit is coupled to the transformer for generating a valley signal in response to a waveform of the transformer. A frequency-variation circuit is coupled to receive the feedback signal and the valley signal for generating a frequency-variation signal. The frequency-variation signal is coupled to turn on the switching signal. A burst circuit is coupled to receive the feedback signal for generating a burst signal to disable the switching signal.