Single-stage high power factor converter without electrolytic capacitors to drive power LEDs

Abstract

This paper proposes the use of a single-stage high-power-factor converter for power LEDs, without electrolytic DC bus capacitor. The power factor correction is obtained through direct connection of the Boost inductor between inverter stage and two input capacitor. A rectifier with output capacitor filter connected between the inverter stage and DC bus capacitors is used to obtain DC current in power LEDs. Experimental results are presented to prove proposed design methodology.