METHOD FOR OPERATING AN LLC RESONANT CONVERTER FOR A LIGHT-EMITTING MEANS, CONVERTER, AND LED CONVERTER DEVICE

摘要

An LLC resonant transformer (19) for a lamp (5) comprises a primary circuit (19) and a secondary side (30) galvanically isolated therefrom. During operation of the LLC resonant transformer (19), a first switch (21) and a second switch (22) of a half-bridge to which an LLC resonant circuit (25-27) of the primary circuit (19) is connected are actuated in a clocked fashion. A load (5) to which an output (35) on the secondary side (30) supplies energy is detected on the basis of a measured variable (iavg) acquired in the primary circuit (20). The half-bridge (21, 22) is variably controlled on the basis of the measured variable (iavg) that is acquired in the primary circuit (20) and indicates the load (5).

主权项

1. A method for operating an LLC resonant converter (19; 79) for a light-emitting means (3; 5; 50), wherein the LLC resonant converter (19; 79) has a primary-side circuit (20; 80), which comprises a half-bridge (21, 22) and an LLC resonant circuit (25-27), and a secondary side (13; 30) galvanically isolated therefrom, the method comprising:
controlling the half-bridge (21, 22) by clocked switching of switches (21, 22) of the half-bridge, detecting a load (3; 5; 50), to which energy is supplied from an output (35) of the secondary side (13; 30), based on a measured variable (iavg) detected in the primary-side circuit (20; 80), and adapting the control of the half-bridge (21, 22) on the basis of the measured variable (iavg) detected in the primary-side circuit (20; 80).