| 摘要 |
The invention relates to an operating circuit for at least one light-emitting diode path (L) with at least one light-emitting diode (LED), comprising a switched-node regulator circuit (SRS), to which a DC voltage is supplied and which provides a constant current for the at least one light-emitting diode path (L), wherein the primary side (P1) of a current mirror (S) is connected in parallel to the light-emitting diode path (L) and a measurement voltage (Umess) is tapped on the secondary side (P2) at a resistance (R2), which is proportional to the voltage drop at the light-emitting diode path (L). |
