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:
Jan. 01, 2019
Filed:
Dec. 22, 2016
Richtek Technology Corporation, Hsinchu, TW;
Yu-Nung Tsai, New Taipei, TW;
Yi-Chun Chen, Taoyuan, TW;
RICHTEK TECHNOLOGY CORPORATION, Chupei, Hsinchu, TW;
Abstract
A control circuit includes: a comparing circuit, having a first input terminal and second input terminal, configured to operably generate a comparison signal according signals received by the first and second input terminals, wherein the first input terminal is utilized for coupling with a reference signal and the second input terminal is utilized for coupling with a feedback signal; a periodic signal generating circuit configured to operably generate a periodic signal and apply the periodic signal to the first input terminal or the second input terminal of the comparing circuit; and a control signal generating circuit for controlling an on time of a power switch according to the comparison signal. The periodic signal generating circuit clamps a limit of the periodic signal to a predetermined value, but does not configure the slope of the periodic signal to be zero when there is no current passing through the inductor.