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:
Feb. 04, 2020
Filed:
Apr. 17, 2019
Universal Lighting Technologies, Inc., Madison, AL (US);
Wei Xiong, Madison, AL (US);
Dane Sutherland, Madison, AL (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
A voltage feedback circuit for a power factor correction circuit couples an output voltage to a voltage feedback input terminal of the power factor correction circuit. The voltage feedback circuit includes a first voltage sensing resistor, a second voltage sensing resistor and a third voltage sensing resistor. A stabilization capacitor is connected across the third voltage sensing resistor. During a normal mode of operation, a feedback voltage has a magnitude determined by the first, second and third voltage sensing resistors. When the output voltage increases rapidly, the stabilization capacitor bypasses the increased voltage around the third voltage sensing resistor to cause the magnitude of the feedback voltage to be determined by only the first and second voltage sensing resistors. The power factor correction circuit detects a transient overvoltage condition at a lower output voltage than if the third voltage sensing resistor were not bypassed.