This paper proposes multi-output Fly-back converter using a simple auxiliary circuit. The main switch of the proposed converter operated at zero-voltage-switching (ZVS) turn-on and zero-current-switching (ZCS) turn-off condition. The auxiliary switch and the other semiconductor are operating at zero-current-switching (ZCS) turn-on and turn-off condition by using a simple auxiliary circuit. The principle of operation, theoretical analysis of the proposed multi-output Fly-back converter rated 130W and operating at 100 KHz, provided to verify its performance. The converter is simulated using PSIM platform to validate its operation and the performance results are presented.Index Terms--Fly-back converter, Multi output, ZCS, ZVS.