A fuzzy logic controller based power factor correction for LED lighting applications

A power factor correction (PFC) topology with fuzzy logic controller (FLC) for light-emitting diode (LED) lighting applications is presented in this paper. Nowadays, high brightness white LEDs becomes feasible in residential, industrial and commercial applications to replace the incandescent bulbs, halogen bulbs and even compact fluorescent light (CFL) bulbs. Since LED lighting represents a green technology, the issue of power factor is very important. A valley-fill circuit is combined with the single-ended primary inductance converter (SEPIC) to achieve power factor nearer to unity. The fuzzy logic controller is implemented to drive the SEPIC-PFC topology. The performance of the proposed design will be analyzed in terms of power factor using the Matlab/Simulink simulation results.