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:
Jan. 11, 2022
Filed:
Jun. 17, 2019
Tridonic Gmbh & CO KG, Dornbirn, AT;
Ludwig Erasmus De Clercq, Dornbirn, AT;
Tridonic GmbH & Co KG, Dornbirn, AT;
Abstract
The present invention relates to a synchronous flyback converter circuit () for operating an illuminant line () having at least one illuminant (), more particularly having at least one light emitting diode, the synchronous flyback converter circuit () comprising: a transformer (T), having a primary winding (Np), which is electrically connected to a first switch (S), and a secondary winding (Ns), which is electrically connected to an output (A, A') of the synchronous flyback converter circuit via a second switch (S), the illuminant line () being able to be connected to the output; and a control unit (), which is designed to control the first switch (S) and the second switch (S). According to a first embodiment according to the invention, the synchronous flyback converter circuit () comprises a sensing circuit (), which is designed to capture a temporal mean of the switch current (IS) flowing through the first switch (Si) and to feed at least one signal (Sg) conveying said temporal mean to the control unit (), the control unit () being designed to separately determine, on the basis of the signal (Sg) fed from the sensing circuit (), a temporal mean of the positive component of the switch current (IS) flowing through the first switch (Si) and a temporal mean of the negative component of the switch current (IS) flowing through the first switch (S). According to a second embodiment according to the invention, the synchronous flyback converter circuit () comprises a sensing circuit (), which is designed to separately capture a temporal mean of the positive component of the switch current (IS) flowing through the first switch and a temporal mean of the negative component of the switch current (IS) flowing through the first switch and to feed a first signal conveying the temporal mean of the negative component of the switch current (IS) and a second signal conveying the temporal mean of the positive component of the switch current (IS) to the control unit ().