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:
Nov. 05, 2019
Filed:
Jan. 19, 2017
Rohm Co., Ltd., Kyoto, JP;
Seiji Takenaka, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A switching power supply circuit has a switching output stage which generates an output voltage from an input voltage by driving a coil current by using an output transistor and a switching controller which turns ON and OFF the output transistor to keep the output voltage or a feedback voltage commensurate with it equal to a predetermined reference voltage. The switching controller includes a reference slope voltage generator which generates a reference slope voltage, a sense voltage holder which generates a held sense voltage by latching a sense voltage commensurate with the coil current with predetermined timing, and a voltage adder which generates a slope voltage by adding up the reference slope voltage and the held sense voltage. The switching controller determines the ON duty of the output transistor by using the slope voltage.