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. 17, 2015
Filed:
May. 16, 2012
Jong Tae Hwang, Seoul, KR;
Moonsang Jung, Seoul, KR;
Daeho Kim, Seoul, KR;
Soohyun Moon, Seoul, KR;
Jongha Shin, Seoul, KR;
Minho Jung, Seoul, KR;
Junhong Lee, Seoul, KR;
Jong Tae Hwang, Seoul, KR;
Moonsang Jung, Seoul, KR;
Daeho Kim, Seoul, KR;
SooHyun Moon, Seoul, KR;
JongHa Shin, Seoul, KR;
MinHo Jung, Seoul, KR;
JunHong Lee, Seoul, KR;
Dongbu HiTek Co., Ltd., Seoul, KR;
Abstract
An isolated flyback converter for an LED driver may include: (1) A snubber circuit configured to be connected to the primary side of a transformer. (2) A switching unit configured to have a source terminal and a drain terminal and configured to be turned on or off. (3) A control unit configured to detect a first input signal proportional to a fluctuation in the power supply voltage, detect a second input signal when the switching unit is turned off, generate a signal inversely proportional to the maximum value of the first input signal and multiply the generated signal to the second input signal, and control a peak current of the switching unit to be proportional to the multiplication result of the signal inversely proportional to the maximum value of the first input signal and the second input signal such that a secondary-side current of the transformer is maintained constant.