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:
Jun. 16, 2026
Filed:
May. 22, 2024
Sanken Electric Co., Ltd., Niiza, JP;
Shinji Aso, Niiza, JP;
SANKEN ELECTRIC CO., LTD., Niiza, JP;
Abstract
A first series circuit includes a main switch and a resonant switch. A second series circuit includes a primary winding and a resonant capacitor. A transformer includes the primary winding and a secondary winding. A controller controls the main switch and the resonant switch. A rectifier smoothing circuit rectifies and smoothes a voltage in the secondary winding. An output voltage detector detects an output voltage of the rectifier smoothing circuit. The controller controls the main switch based on a first drive signal. The controller turns on the resonant switch during a flyback period when an energy stored in the transformer is released from the secondary winding based on the second drive signal, which causes a resonant current to flow. The controller turns off the resonant switch during an excitation current charging period in which the energy stored in the transformer charges the resonant capacitor after the resonant current stops flowing.