A charge-pump led driver with PFC and low-frequency-flicker reduction

This paper presents the LED driver with power factor correction (PFC) and low current harmonic distortion. The structure provides low current ripple, low percent flicker and zero voltage switching (ZVS). The converter output power is varied by reducing the switching frequency, and it does not use electrolytic capacitors (E-cap), what increase the LED driver lifetime. A prototype was developed to evaluate the performance of the proposal, while results are properly presented and discussed. The experimental results presented power factor is 0.996, 3.19% current total harmonic distortion, 9.5% low frequency current ripple and a percent flicker in accordance with the IEEE Std 1789-2015.