This paper proposes a soft-switched single-phase high-power factor ac/dc converter. This circuit is a combination of the buck converter and the boost converter. In this proposes topology boost converter work as a power factor correction (PFC). Which improve power factor and reduces total harmonic distortion (THD). buck converter further regulates stable DC output voltage Without using any active clamp circuit and the snubber circuit. Active switches of this converter can achieve zero voltage switching (ZVS) switching with high power factor that satisfies the IEC 61000-3-2 standards. A design example for a 60W converter supplied is simulated and designed.