Bridgeless flyback converter for low power lighting application

Abstract

Lighting system management and optimization have turned into the most important research trend in lighting electronics. Solar LED lighting scheme is a major kind of light sources in the coming decades because of the efficiency concerns and renewable energy utilization. Conventional LED driving circuit is the combination of diode bridge rectifier and input PFC stage. Diode bridge rectifier at the front end of driving circuit will cause reduced conversion efficiency and power factor. This paper deals with reliable lighting scheme which can be supplied from both solar panel and conventional supply. A battery storage unit is also used to store the energy from PV panel and it also reduces the peak loading while it charging from conventional supply. The dc supply from grid connection is obtained by using bridgeless flyback converter which has inherent power factor correction capability. A MATLAB/Simulink model of proposed scheme is developed for validating the theoretical explanation and the relevant results are also discussed.