Interleaving is one type of parallelling method. It is a well known method for high power applications. It offers several advantages the foremost among all is the input current sharing. Besides, the interleaving allows more reliability and ease in maintenance, repairing, fault tolerance and hence increases the reliability. In interleaved converters phase difference is applied to the control signals of several cells connected in parallel and operated on the the same switching frequency. Therefore, the summed up input and output current have a good performance in terms of THD, conduction losses, EMI, and has less current ripple. Because of the low THD and cancellation of low frequency harmonics the filter requirement is much smaller with less size and weight.