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:
Feb. 08, 2022
Filed:
Sep. 25, 2020
Fuji Electric Co., Ltd., Kawasaki, JP;
Yuta Endo, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
An integrated circuit for a power supply circuit that generates an output voltage at a target level from an AC voltage input thereto. The power supply circuit includes an inductor, and a transistor that controls a current flowing through the inductor. The integrated circuit drives the transistor based on the inductor current and the output voltage. The integrated circuit has a signal output circuit including a first comparator circuit comparing the inductor current and a predetermined current value, a timer circuit measuring a time elapsed since the value of the inductor current becomes smaller than the predetermined current value, and a second comparator circuit comparing the output voltage and a lower-than-target level. The signal output circuit indicates that the AC voltage is not input to a rectifier circuit, when the elapsed time reaches a predetermined time period and a level of the output voltage is lower than the lower-than-target level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile