4 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 the 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, which resulted in reduction of switching losses. Owing to the reduction of switching losses, the overall efficiency of proposed converter is achieved 92.6% at 100% dimming. Further the converter is operated with DC bus voltage, therefore the filter capacitor is sufficient to eliminate switching ripples, which results in elimination of filter capacitors and enhance the lifespan of LED driver. Moreover, the proposed converter is tested with dimming level from 20% to 100% to study the effectiveness of DPWM dimming control. For an input DC bus voltage of 24 V, the efficiency higher than 92.6% has been achieved owing to less power processing by the converter and 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 as future work.