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:
Sep. 09, 2025
Filed:
Oct. 13, 2021
Tridonic Gmbh & CO KG, Dornbirn, AT;
Hans Auer, Dornbirn, AT;
Andre Mitterbacher, Dornbirn, AT;
Tridonic GmbH & Co KG, Dornbirn, AT;
Abstract
A converter () for operating an LED load is provided. The converter () comprises an actively switched power factor correction, PFC, circuitry (-), having a control circuitry (-) for controlling a switch () of the PFC circuitry (-). The control circuitry (-) is configured to control a switch-on timing of the switch () such that an output voltage (, V) of the PFC circuitry (-) is feedback-controlled in accordance with a nominal value (). In a discontinuous conduction mode, DCM, the control circuitry (-) is configured to control an actual value (, T) of the switch-on timing of the switch () in one or more switching cycles to be a time of a valley of a voltage across the switch () succeeding a nominal value (, T) of the switch-on timing of a control algorithm implemented by the control circuitry (-). The control circuitry (-) is further configured to control the actual value (, T) of the switch-on timing of the switch () in one or more subsequent switching cycles being subsequent to the one or more switching cycles to be a time of a valley of the voltage across the switch () preceding the nominal value (, T) of the switch-on timing. This reconciles valley switching and avoidance of visible light flicker.