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1. (WO2018104087) CIRCUIT ASSEMBLY AND METHOD FOR OPERATING A LIGHTING MEANS

Pub. No.:    WO/2018/104087    International Application No.:    PCT/EP2017/080445
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Tue Nov 28 00:59:59 CET 2017
IPC: H05B 33/08
Applicants: TRIDONIC GMBH & CO KG
Inventors: DUENSER, Mathias
MAYRHOFER, Markus
ORTEGA, Joan
Title: CIRCUIT ASSEMBLY AND METHOD FOR OPERATING A LIGHTING MEANS
Abstract:
The invention relates to a circuit assembly (1) for operating lighting means (2) comprising: a clocked circuit (20), which can be supplied with voltage and which feeds a resonant circuit (21) having LLC topology; a transformer (T) for transferring electrical energy from a primary winding (L1) to a secondary winding (L2), which transformer follows the resonant circuit (21); and a control unit (9), to which a current actual-value signal reflecting the current (Iprim) through the resonant circuit (21) and a voltage actual-value signal representing the magnetizing current (ILm) of the transformer (T) are fed, wherein the control unit (9) is designed to determine the secondary-side current (Isec) on the basis of the current actual-value signal and the voltage actual-value signal and to control the clocked circuit (21) on the basis of the secondary-side current and wherein, in order to capture the voltage actual-value signal, which represents the magnetizing current (ILm), a measuring inductor (L3) is provided, which is coupled to the primary winding (L1) of the transformer (T).