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. 02, 2025
Filed:
Aug. 02, 2023
Rohm Co., Ltd., Kyoto, JP;
Takatsugu Wachi, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power supply semiconductor device includes: first and second external terminals connected to positive and negative electrodes of input capacitor via first and second external current paths, respectively; third and fourth external terminals connected to the positive and negative electrodes of the input capacitor via third and fourth external current paths, respectively; first and second transistors provided between the first and second external terminals; third and fourth transistors provided between the third external terminal and the fourth external terminal; switch terminal commonly connected to connection node between the first and second transistors and connection node between the third and fourth transistors; and drive control circuit performing switching control to alternately turn on and off a set of the first and third transistors and a set of the second and fourth transistors, thereby generating a switching voltage at the switch terminal based on voltage across the input capacitor.