Patent ID: 9491815
Filing Date: 2016-11-08
CPC Classification: H05B,Y02B

Claim Text:
1. A circuit for driving at least one light emitting diode (LED) luminaire, said circuit comprising: a resonant mode controller; a converter comprising a transformer having a primary winding and a plurality of secondary windings each magnetically coupled to said primary winding, a bridge circuit arranged to switch responsive to said resonant mode controller, and a primary side capacitance element in electrical communication with said primary winding; a first output associated with a first of said plurality of secondary windings, said resonant mode controller arranged to adjust the switching frequency of said bridge circuit so as to maintain said first output at a predetermined level; a second output associated with a second of said plurality of secondary windings; a secondary side capacitance element arranged in series between said second of said plurality of secondary windings and said second output; an LED controller; a first LED luminaire arranged to provide a first illumination responsive to a power signal on said second output; and a first current regulator arranged to regulate current flowing through said first LED luminaire responsive to said LED controller, wherein the second of said plurality of secondary windings exhibits a leakage inductance, and wherein the combination of the leakage inductance and capacitance of the secondary side capacitance element forms a resonant circuit with a resonance greater than a maximum switching frequency of said bridge circuit.