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. 02, 2021
Filed:
Mar. 05, 2020
Tdk Corporation, Tokyo, JP;
Hisanori Cho, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A switching power supply device includes a pair of input terminals, a pair of output terminals, N number (N: an integer of 2 or greater) of transformers, N number of inverter circuits, a rectifying and smoothing circuit, and a driver. The transformers include respective primary-side windings and respective secondary-side windings. The inverter circuits are disposed in parallel between the pair of input terminals and the primary-side windings and each include switching elements. The rectifying and smoothing circuit is disposed between the pair of output terminals and the secondary-side windings and includes a rectifying circuit and a smoothing circuit. The driver sets an input voltage to be supplied to the smoothing circuit at successive stage levels (N+1) by causing, through switching driving, the inverter circuits to apply a predetermined pulse voltage or a voltage at a predetermined voltage value to the respective primary-side windings.