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. 19, 2019
Filed:
Nov. 08, 2016
Rohm Co., Ltd., Kyoto, JP;
Hiroyuki Hatano, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
An AC/DC converter includes a transformer including a primary winding connected to an AC power source and a secondary winding electromagnetically coupled to the primary winding, a bidirectional switch connected in series to the primary winding, a resonant capacitor connected in parallel or series to the bidirectional switch, a full-wave rectification circuit arranged to perform full-wave rectification of an induced voltage generated in the secondary winding, a smoothing capacitor arranged to smooth an output of the full-wave rectification circuit, and a control circuit arranged to turn on and off the bidirectional switch. The transformer is a leakage transformer or a resonant transformer having leakage inductance. The AC converter takes out both forward voltage and flyback voltage from the secondary winding, so as to directly convert an AC input voltage supplied from the AC power source into a DC output voltage.