Reduced ripple current LED lighting system with two series resonant converters

In this paper, a full-bridge series resonant converter based LED driver is proposed. Phase shift control is employed for regulating LED current. Here two full-bridge series resonant converters are operated in phase shift in order to reduce LED current ripple. With reduced ripple current it offers the advantage of avoiding electrolytic capacitor increasing the life span of LED driver. ZVS is incorporated in this proposed converter and hence switching losses are reduced. It regulates LED current against input voltage variation. The detailed description, circuit analysis and simulation results of the proposed converter are presented.