CONCLUSION
This work proposes a single input full-bridge LC series resonant converter based high brightness light emitting diode driver with ZVS. This work presents detailed analysis, design guidelines and simulation results in order to study the effectiveness of the proposed single input full-bridge series resonant converter. The proposed converter is designed to operate with zero-voltage-switching, resulting in reduction of switching losses. Owing to the reduction of switching losses, the overall efficiency of the proposed converter is 92.6% at 100% dimming. Further, since the converter is operated with DC bus voltage, the filter capacitor is sufficient to eliminate switching ripples, thereby resulting in the elimination of filter capacitors and an enhanced lifespan of the LED driver. Moreover, the proposed converter is tested with dimming levels from 20% to 100% to study the effectiveness of DPWM dimming control. For an input DC bus voltage of 24 V, efficiency is higher than 92.6%, achieved owing to less power processing by the converter and the presence of ZVS throughout the operating range. An efficient power factor correction converter may be included in the configuration and different control techniques for better dimming may be studied in future work.