I am trying to simulate Push-pull converter in LT spice. Vin=50 Vo= 17.5V, and input power of P=38.28W with switching frequency of f 150kHz, L= 268.19uH and C = 41.42nF and R load=8ohms. I am not able to get the desired output across the load resistance. Is it because of Flux walking at primary of transformer or due to some other reason? Should I need to design a simple RC snubber for the two Mosfets and what is the procedure for designing snubber for push-pull converter? The main problem is that the PWM pulses applied to primary of the transformer is not a perfect alternating square wave and pulses are reaching a peak value of 27KV which is not at all desirable. Any suggestions to rectify this problem.