An integrated PFC and DC/DC stage with reduced voltage stress across the switches is proposed for power factor correction and output voltage regulation. The paper aims to converter gives AC to DC rectification, input power factor correction and output voltage regulation that all will takes place into a single stage. The advantage of PFC and DC/DC stage system includes optimum utilization of common controlled switches, benefit of the system that numbers of switches utilization are also reduced significantly, so that Conduction losses are lowered by eliminating the full-bridge diode rectifier. Feedback from output side to input side is obtained by inserting an additional winding on primary side, due to this voltage stresses across the switches reduced. According to the results are verified for different input voltages from 80V to 270V (rms) by Matlab simulation.