Patent ID: 9668309
Date: 2017-05-30
CPC Classifications: H05B,Y02B

Claim:
1. An LED driver comprising: first and second switching elements coupled in series across a DC power input source; a first resonant inductive element coupled on a first end to a first node between the first and second switching elements; first and second voltage clamping elements coupled in series across the DC power input source, wherein a second end of the first resonant inductive element is coupled to a second node between the first and second voltage clamping elements; a second resonant inductive element and a resonant energy storage device coupled in series between the second node and a power input source ground terminal; and a primary winding of an output transformer coupled in parallel with the energy storage device, wherein the LED driver further comprising a rectifier circuit coupled across a secondary winding of the output transformer; an output energy storage device coupled across the rectifier circuit; and first and second output terminals configured to provide an output voltage from the rectifier circuit and the output energy storage device to one or more LEDs coupled thereto.