LLC Resonant Converter Based Led Driver Fed by Single Phase High Power Factor Boost Converter

Power LED drivers are divided into pulse width modulated drivers and resonant typologies, such as LLC resonant drivers. The led driver with LLC resonance topology operating at 400kHZ resonant frequency is targeted as 90W. LLC resonant circuit model was established in MATLAB environment, and the effect of tank parameters in the simulation model was discussed. According to the simulation results, output voltage, bridge diode current, resonant tank current, switching current, switching voltage, output voltage of boost power factor correction (PFC) circuit, mains voltage and current, and network total harmonic distortion (THD) values were measured. As result of simulation study, led is driven with LLC converter, PF is increased to 0.99, THD is reduced to 10.91 % as desired.