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:
Jul. 13, 2021
Filed:
Sep. 03, 2020
Universal Lighting Technologies, Inc., Madison, AL (US);
Wei Xiong, Madison, AL (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
An LED driver circuit includes a DC-to-AC inverter that provides a primary AC voltage to the input node of a resonant tank circuit. The resonant tank circuit includes a resonant tank circuit inductor, a resonant tank circuit capacitor and a primary winding of an output transformer. The resonant tank circuit capacitor and the primary winding are connected in parallel between a resonant tank circuit output node and a DC balance node. The DC balance node is coupled to a first bus by a first DC-blocking capacitor and is coupled to a second bus by a second DC-blocking capacitor. The output transformer has at least one secondary winding. An AC output voltage from the secondary winding is rectified to generate a DC voltage, which is applied to a load having a plurality of LEDs. The resonant tank circuit input node is clamped by first and second clamping diodes.