Patent ID: 9018852
Filing Date: 2015-04-28
Classification: H05B

Abstract:
1. A light emitting diode (LED) based luminaire driving arrangement comprising: a switched power conversion stage having a power transformer with a primary winding, a first secondary winding and at least one second secondary winding, the switched power conversion stage arranged to produce a predetermined voltage across each of the at least one second secondary windings, wherein control of the switched power conversion stage is responsive to a direct current voltage output developed from said first secondary winding; a plurality of LED based luminaires arranged to receive power from said at least one second secondary winding of said switched power conversion stage; at least one electronically controlled switch in series with at least one of said plurality of LED based luminaires and arranged to alternatively pass current through the at least one LED based luminaire when closed and prevent the flow of current through the at least one LED based luminaire when opened; and at least one synchronous driver in communication with said at least one electronically controlled switch, said at least one synchronous driver arranged to sense when said switched power conversion stage is actively supplying power via said at least one second secondary winding and close said at least one electronically controlled switch only when said switched power conversion stage is sensed as actively supplying power via said at least one second secondary winding.