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:
Jun. 02, 2026
Filed:
Jul. 18, 2024
Satoshi Arima, Isehara, JP;
Satoshi Arima, Isehara, JP;
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Abstract
A semiconductor device for a switching power supply is configured to perform ON/OFF control of a switching element connected in series to a primary winding of a transformer. The semiconductor device includes: a resonance monitor circuit that monitors a resonance state of a secondary winding of the transformer; a timer circuit that generates a period signal for determining a switching period of the switching element; a turn-on circuit that outputs a turn-on signal for the switching element; a turn-off circuit that outputs a turn-off signal for the switching element in response to detecting a current with a predetermined current value flowing through the switching element; and a jitter generation circuit that generates a first jitter signal for giving jitter to a period of the period signal and a second jitter signal for giving jitter to the predetermined current value. The first and second jitter signals have a predetermined phase difference.