Improved power quality based high brightness LED lamp driver

This paper deals with a power factor corrected (PFC) improved power quality based LED lamp driver. The proposed driver consists of a PFC Cuk DC-DC converter which operates in continuous conduction mode (CCM) to improve the power quality at input AC mains. The design, modeling and simulation of an 18W LED (six 3W LEDs in series) driver are carried out in MATLAB/SIMULINK environment for a 220V, 50 Hz AC mains with constant load voltage of 72V. Each LED has a forward voltage of 12V and a forward current of 0.25A. The power quality indices such as total harmonic distortion of AC mains current (THDi), power factor (PF), distortion factor (DF), displacement power factor (DPF) and crest factor (CF) are calculated to study the behavior of proposed LED lamp driver.