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:
Mar. 21, 2017
Filed:
Jul. 17, 2015
Eptronics, Inc., Gardena, CA (US);
Tom O'Neil, Torrance, CA (US);
Lee Chiang, Sylmar, CA (US);
EPTronics, Inc., Gardena, CA (US);
Abstract
An LED driver has a primary side regulation with at least one input connected to the AC power line, and at least two outputs. At least one output is for driving LEDs and at least one output is for providing auxiliary power for associated circuits. The driver is constructed using the flyback principle, having at least one flyback transformer which has at least one primary winding connected to a flyback switching transistor. At least one principal output winding is connected to the LED load, and at least one feedback winding is connected to a control chip. At least one auxiliary winding drives the auxiliary power output. The auxiliary winding has a coupling coefficient to said feedback winding which is greater than the coupling coefficient between the principal output winding and the feedback winding.