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This paper reports a multichannel high-power light-emitting diode (LED) driver employing a single-stage dc–dc power conversion and control technique with dimming capability. A half-bridge nonresonant converter with symmetrical quadrupler rectifier output is implemented to convert available dc power to multiple current regulated dc outputs for driving LED loads. The dc–dc power conversion efficiency...
Battery-operated Light Emitting Diodes (LEDs) are often arranged in parallel strings in a lighting fixture due to the high voltage gain required in case of a series type connection. Yet, current sharing is prevalent in the parallel configuration due to the large forward voltage tolerance of high-power LEDs resulting in uneven light output and premature failure when they are “overdriven”. Current-matching...
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