This paper addresses a novel approach for designing and modeling of the isolated flyback converter. Modeling is done without parasitic as well as with parasitic components. A detailed analysis, simulation and different control strategy are conferred for flyback converter in continuous conduction mode (CCM). To verify the design and modeling at primary stage, study of the converter is practiced in CCM operation for input AC voltage 230V at 50Hz and output DC voltage of 5V and 50W output power rating using PSIM 6.0 software. Simulation result shows a little ripple in output of the converter in open loop. Finally in order to evaluate the system as well as response of the controller, flyback converter is simulated using MATLAB. This work, highlighting the modeling when the system have transformer and facilitate designers to go for it when they need one or more than one output for a given application upto 150W.