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:
Jul. 13, 2021
Filed:
Jan. 30, 2020
Fuji Electric Co., Ltd., Kawasaki, JP;
Jian Chen, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
A switching power supply includes a current resonance-type DC-DC converter that has an auxiliary winding provided on the primary side of a transformer, divides a voltage, which has been generated in the auxiliary winding by a current resonance operation, using a voltage divider circuit formed of resistors, and supplies, to a control IC, the divided voltage as a detection voltage for the resonant voltage for setting a timing for turning off a switching element. A phase correcting capacitor is provided between the auxiliary winding and the voltage divider circuit and corrects a delay in switching timing by setting the phase of the voltage of the voltage divider circuit ahead of the voltage of the auxiliary winding.