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. 23, 2019
Filed:
Aug. 29, 2018
Universal Lighting Technologies, Inc., Madison, AL (US);
Wei Xiong, Madison, AL (US);
Scott Price, Madison, AL (US);
Danny Pugh, Harvest, AL (US);
Candice Ungacta, Huntsville, AL (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
A lighting device, and method of controlling a power stage thereof, is provided to stabilize operation at low output currents. An output current is sensed as a feedback signal and provided to control circuitry, which further defines upper and lower boundaries for a control band about an average sensed input control value. A reference signal corresponds to the average sensed input control value, wherein adjustments to the reference signal are enabled only when an actual sensed input control value extends beyond the control band. The upper and lower boundaries may be linearly or non-linearly approaching the average control value as a function of increases in the average control value, to prevent control adjustments in particular for low output current conditions. Control signals are generated for driving one or more switching elements in the power stage, based at least in part on the feedback signal and the generated reference signal.