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. 09, 2026
Filed:
Jul. 17, 2024
Satoshi Arima, Isehara, JP;
Satoshi Arima, Isehara, JP;
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Abstract
A switching power supply includes a transformer, a switching element connected to the primary-side winding, a power control semiconductor device that outputs a signal for performing ON/OFF control of the switching element, and a current-voltage conversion element connected to the switching element. The semiconductor device includes: a first terminal that receives a voltage/current corresponding to an output from the secondary side of the transformer; a second terminal that receives the voltage converted by the current-voltage conversion element; a period signal generation circuit that generates a signal for periodically turning on the switching element; a current detection circuit that generates a signal for turning off the switching element, based on a voltage/current at the first terminal and a voltage at the second terminal; and a complementary current circuit that outputs a complementary current to the second terminal. A complementary resistor is provided between the second terminal and the current-voltage conversion element.