US Patent 6972525 Led switching arrangement

A switching arrangement includes first, second and third circuits. The first circuit is connected between a first input and a first output of the switching arrangement. The first circuit has a self-inductance, a capacitor and a diode. The second circuit is connected between the first input and a second input of the switching arrangement, and includes a switching element. The third circuit is connected between the first output and a second output of the switching arrangement, and has a diode and an inductive winding. The switching arrangement further includes a transformer having a primary winding, where the inductive winding forms a secondary winding of the transformer