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:
Feb. 27, 2018
Filed:
Mar. 09, 2017
Applicant:
Richtek Technology Corporation, Zhubei, Hsinchu County, TW;
Inventors:
Chang-Yu Wu, Zhubei, TW;
Wei-Ming Chiu, Zhubei, TW;
Assignee:
RICHTEK TECHNOLOGY CORP., Zhubei, Hsinchu County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0815 (2013.01); H05B 33/083 (2013.01); H05B 33/0827 (2013.01); H05B 33/0842 (2013.01); H05B 33/0857 (2013.01); H05B 33/0887 (2013.01); Y02B 20/341 (2013.01);
Abstract
A control chip of a driving circuit for driving a LED array shares a ground terminal with the LED array so that, without an additional winding, the driving circuit can provide a supply voltage for the control chip, implement a zero-current switching function, and implement an over-voltage protection function. Since no additional windings are needed, the related costs and the size of the driving circuit are decreased.