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:
Jul. 03, 2018
Filed:
Dec. 30, 2016
Richtek Technology Corporation, Zhubei, HsinChu, TW;
Yi-Wei Lee, Taipei, TW;
Chien-Yang Chen, Taipei, TW;
Isaac Y. Chen, Zhubei, TW;
Ta-Yung Yang, Taoyuan, TW;
RICHTEK TECHNOLOGY CORPORATION, Zhubei, Hsinchu, TW;
Abstract
The present invention provides a switching regulator with PFC function and a control circuit and a control method thereof. The switching regulator with PFC function includes a power stage circuit, a current sense circuit, and a control circuit. The power stage circuit operates at least one power switch therein according to an operation signal to convert an input voltage to an output voltage. When a transient voltage of the input voltage exceeds a transient voltage upper limit, or when a transient slew rate of the input voltage exceeds a transient slew rate upper limit, the control circuit adjusts a frequency response gain from a stable state frequency response gain to a transient state frequency response gain, such that a transient current of an output current does not exceed a current upper limit, and/or that a transient response time of the output current does not exceed a threshold transient time period.