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. 04, 2014
Filed:
Sep. 10, 2012
Matthew W. Nuhfer, Bethlehem, PA (US);
Thomas M. Shearer, Macungie, PA (US);
Venkatesh Chitta, Center Valley, PA (US);
Kartik Iyer, Emmaus, PA (US);
Matthew W. Nuhfer, Bethlehem, PA (US);
Thomas M. Shearer, Macungie, PA (US);
Venkatesh Chitta, Center Valley, PA (US);
Kartik Iyer, Emmaus, PA (US);
Lutron Electronics Co., Inc., Coopersburg, PA (US);
Abstract
A converter for an LED driver for an LED light source. The converter has a flyback transformer. The primary receives a rectified AC voltage. A switching transistor is coupled in series with the primary. A controller controls the switching transistor on and off to generate a bus voltage across the secondary and a center tap voltage at a center tap of the secondary. The controller is powered by a first low-voltage DC voltage. A first power supply receives the center tap voltage and generates a second low-voltage DC voltage when the center tap voltage is above a cutover voltage. A second power supply has an output coupled to the first power supply output. The second power supply receives the bus voltage and generates the second DC voltage when the center tap voltage is below the cutover voltage.