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:
Dec. 16, 2025
Filed:
Mar. 25, 2021
Tdk Corporation, Tokyo, JP;
Masahiko Hirokawa, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A switching power supply apparatus includes a pair of input terminals, a pair of output terminals, a transformer, an inverter circuit, a rectifying and smoothing circuit, and a controller. The inverter circuit includes first and second switching devices, a resonant inductor, and a resonant capacitor. The controller controls a switching operation of each of the first and second switching devices. The first and second switching devices are coupled in series to each other between a pair of coupling lines. The resonant inductor, the resonant capacitor, and a primary winding are coupled in series to each other in no particular order between a node between the first and second switching devices, and one of the pair of input terminals. The controller controls the switching operation on the basis of a voltage across the resonant capacitor and a voltage across the primary winding.