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. 21, 2017
Filed:
Apr. 11, 2016
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Seung Woo Hong, Seoul, KR;
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Abstract
A Pulse-Width Modulation (PWM) controlling apparatus includes a valley detector configured to detect a valley of an auxiliary winding voltage of a flyback converter, an output voltage controller configured to output a first PWM control signal by performing averaging and sampling of the auxiliary winding voltage, an output current controller configured to output a second PWM control signal by performing an average current mode method on a current signal (CS) voltage, a latch configured to output a gate control signal after being supplied with the result of a logical OR operation of the first PWM control signal output by the output voltage controller and the second PWM control signal output by the output current controller, or an output signal of the valley detector, and a gate controller configured to perform a turning-on or turning-off operation of a first switch based on the gate control signal.