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:
Jan. 08, 2019
Filed:
Apr. 28, 2018
Richtek Technology Corporation, Zhubei, Hsinchu, TW;
Tzu-Chen Lin, Taipei, TW;
Kun-Yu Lin, Hsinchu, TW;
RICHTEK TECHNOLOGY CORPORATION, Zhubei, Hsinchu, TW;
Abstract
A flyback power converter circuit includes: a transformer including a primary winding coupled to an input power and a secondary winding coupled to an output node, a primary side switch controlling the primary side winding to convert the input power to an output power on the output node through the secondary side winding, a clamping circuit including an auxiliary switch and an auxiliary capacitor connected in series to form an auxiliary branch which is connected with the primary side winding in parallel, and a conversion control circuit for adjusting an auxiliary ON time of the auxiliary switch during an OFF time of the primary side switch according to an estimated parasitic diode conduction time of a parasitic diode of the auxiliary switch; the auxiliary ON time is controlled to be substantially equal to and coincides with the estimated parasitic diode conduction time.