Electrolytic capacitor free and reduced 120[Hz] ripple on the output of a single-stage CCM flyback converter with power factor correction for LED lightings

Interest of light emitting diode (LED) lightings is more and more increased because of its low power consumption and long lifetime. Generally, the LED lighting is driven by a power converter. Electrolytic capacitors are used for stabilizing the output ripple of the power converter. However, the expected lifetime of electrolytic capacitors is very shorter than LED or other components in the power converter. As the result of that, expected life time of LED lighting is decreased. In this paper, a single-stage CCM flyback converter without electrolytic capacitors is proposed. The proposed converter is verified through simulations and experiment.