Patent ID: 7554822

Claim:
Power converter for receiving an input current at an input voltage and for providing an output current at an output voltage, said power converter comprising: a transformer having a primary winding and at least one secondary winding, wherein the primary and secondary windings are integrated in a printed circuit board (PCB) in a planar manner, wherein the PCB is mounted to a first side of a heat sink, the transformer showing a mutual inductivity L m and a leakage inductivity L si at least one switching device being operated at an operating frequency f op at the primary side of said transformer; and a capacitor C s at the primary side of said transformer, said capacitor forming a resonant circuit with said leakage inductivity L s of said transformer, wherein said operating frequency, said capacitor C s , said mutual inductivity L m and said leakage inductivity L s are matched such that the effective value of the output current is substantially constant with respect to variations of a load being traversed by said output current, and wherein the PCB is thermally coupled to the first side of the heat sink, and a load of the power converter includes a plurality of light emitting diodes thermally coupled to a second side of the heat sink.