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:
May. 16, 2017
Filed:
Oct. 22, 2015
Applicant:
Richtek Technology Corporation, Zhubei, Hsinchu County, TW;
Inventors:
Jiun-Hung Pan, Taipei, TW;
Tong-Cheng Jao, Taichung, TW;
Yi-Wei Lee, Taipei, TW;
Isaac Y. Chen, Jubei, 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 33/083 (2013.01); Y02B 20/341 (2013.01); Y02B 20/345 (2013.01);
Abstract
A linear LED driver comprises a transistor having an input terminal coupled to a LED. When the transistor is turned on, the LED is lighted. The linear LED driver further includes a protection circuit for judging whether an instant high voltage variation occurs or not according to at least one of the voltages of a control terminal and an output terminal of the transistor so as to achieve a protection function.