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. 12, 2018
Filed:
Jun. 20, 2016
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Seiji Takenaka, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/36 (2006.01); H02M 3/156 (2006.01); H02M 1/32 (2007.01);
U.S. Cl.
CPC ...
G09G 3/3648 (2013.01); G09G 3/3696 (2013.01); H02M 1/32 (2013.01); H02M 3/156 (2013.01); G09G 2310/0289 (2013.01); G09G 2330/021 (2013.01); G09G 2330/04 (2013.01);
Abstract
A switching power supply circuit has: a switching output generator that generates an output voltage from an input voltage by using an output transistor; a switching controller that turns ON and OFF the output transistor so as to keep the output voltage, or a feedback voltage commensurate therewith, with a predetermined reference voltage; and a maximum duty controller that varies the maximum duty of the output transistor according to the reference voltage, the output voltage, or the feedback voltage.