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. 16, 2026
Filed:
Jan. 26, 2024
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventors:
Kenji Hama, Kyoto, JP;
Takahiro Kotani, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/081 (2006.01); H02M 1/08 (2006.01); H03K 17/06 (2006.01);
U.S. Cl.
CPC ...
H03K 17/08104 (2013.01); H02M 1/08 (2013.01); H03K 17/063 (2013.01);
Abstract
For example, the switching drive deviceincludes a driverconfigured to drive an N-type semiconductor switch element, a current limiterconfigured to limit a current fed to a boot capacitor BCincluded in a bootstrap circuit BTC, and a current controllerconfigured to control the operation of the current limiter. The current controlleris configured to drive the current limiterto limit the current fed to the boot capacitor BCwhen the charge voltage across the boot capacitor BCis higher than a threshold value.