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:
Oct. 17, 2023
Filed:
Jun. 15, 2021
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Hiroyuki Hatano, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/36 (2007.01); H02M 1/00 (2006.01); H02M 3/335 (2006.01);
U.S. Cl.
CPC ...
H02M 1/36 (2013.01); H02M 1/0006 (2021.05); H02M 3/33592 (2013.01);
Abstract
A power supply control device includes: a drive switch circuit formed by cascade-connecting a depletion type first transistor and an enhancement type second transistor, and configured to drive a transformer of an insulated switching power supply; a control circuit configured to control the second transistor; and a start-up circuit configured to charge a power supply voltage of the control circuit by using a source voltage of the first transistor.