Analysis of Converters for Single Phase LED Driver with Input Power Factor Correction

Most of the loads in household are inductive in nature and hence have low power factor. When, the power factor is low the current flowing through the system components will be higher. It results in heating and shortens the life of the system. Hence, power factor improvement is necessary. This paper proposes the comparison of bridgeless Single-ended primary-inductance converter (SEPIC) and bridgeless Landsman converter with the input power factor correction for LED drive application. The gating signal for switches in the converters are generated using PWM generator. Bridgeless configuration is used to reduce the conduction loss in the negative half cycle which improves the efficiency of about 1 to 2% for the entire power supply. In this configuration number of conducting diodes is reduced. This proposed work is designed and simulated using MATLAB / Simulink software. The simulated results from the two converters were analyzed for the input power factor correction.