| 摘要 |
The invention relates to a switching arrangement for operating at least one LED, which switching arrangement is provided with input terminals ( 1, 2 ) for connecting a supply source, -output terminals ( 3, 4 ) for connecting the LED to be operated, -a first series circuit (I) between one of the input terminals ( 1 ) and one of the output terminals ( 3 ), including at least a self-inductance (L), a capacitor (C) and a diode (D), -a second series circuit (II) between the input terminals, including at least the self-inductance (L) and a switching element (S) which is alternately switched to a conducting state and a non-conducting state at a high frequency, -a third series circuit (III) between the output terminals, including the diode and an inductive winding (SW). According to the invention, the inductive winding forms a first winding (SW 1 ) of a transformer (T) which has a second winding (SW 2 ) that forms part of the first series circuit and which also has a connection point with the first winding.
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