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:
Jan. 16, 2018
Filed:
Mar. 30, 2017
Sanken Electric Co., Ltd., Niiza-shi, Saitama, JP;
Osamu Ohtake, Niiza, JP;
Ryuichi Furukoshi, Asaka, JP;
Sanken Electric Co., Ltd., Niiza-shi, JP;
Abstract
The present invention includes: a series circuit formed of a reactor Lr, a primary winding P of a transformer T, and a capacitor C; a full-wave rectifier/smoothing circuit D, D, Cconfigured to perform full-wave rectification and smoothing on a voltage generated in a secondary winding S of the transformer thereby to extract a DC voltage; a control circuit FFconfigured to set a first ON time of the first switch element Qand a second ON time of the second switch element Qto the same predetermined time thereby to alternately turn on and off the first switch element and the second switch element; and a first ON time controller I, Cconfigured to set one of the first ON time and the second ON time, shorter than the predetermined time, under light-load conditions, based on the DC voltage detected by a detector