Active clamped ZVS forward converter with soft-switched synchronous rectifier for maximum efficiency operation

An active-clamped, zero-voltage switched forward power converter equipped with a soft-switched synchronous rectifier is designed and implemented for low output voltage applications where maximized efficiency is of utmost importance. The power converter efficiency is maximized due to the soft-switching of the main active clamp and the synchronous rectifier MOSFET switches. Experimental results are presented for a power converter with a DC input voltage of 48 V, an output voltage of 5 V and a DC electronic load up to 10 A. The measured efficiency was 92% for an output power of 50 W.