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:
Sep. 08, 2026
Filed:
Sep. 05, 2024
Rohm Co., Ltd., Kyoto, JP;
Kiminobu Sato, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In a switching power supply apparatus configured to generate an output voltage from an input voltage, the output voltage is obtained by rectifying and smoothing a switch voltage obtained by alternately turned on and off first and second transistors connected in series to each other in accordance with the output voltage. A light-load support circuit includes a reverse current detection circuit that outputs a reverse current detection signal when a magnitude of the switch voltage is lower than an offset voltage during an on period of the second transistor, and an offset correction circuit. In response to the reverse current detection signal, a transition to a specific state occurs, in which the first and second transistors are off. The offset correction circuit corrects the offset voltage on the basis of the switch voltage at a specific timing of being switched to the specific state.