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. 22, 2025
Filed:
Feb. 24, 2023
Fuji Electric Co., Ltd., Kawasaki, JP;
Takato Sugawara, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
An integrated circuit for a power supply circuit that generates an output voltage from an alternating current (AC) voltage, the power supply circuit including a transistor configured to control a current flowing through an inductor. The integrated circuit comprises: a first terminal, to which a first capacitor is coupled, that receives a voltage corresponding to the AC voltage; a driver circuit turns on the transistor in response to a predetermined condition being satisfied, and turns off the transistor based on a feedback voltage corresponding to the output voltage and the voltage corresponding to the AC voltage, an ON period of the transistor inversely correlating to a level of the voltage corresponding to the AC voltage; and a discharge circuit that discharges the first capacitor in a time period from a first timing at which the transistor is turned off to a second timing at which the transistor is turned on.