A Comparative Evaluation of SMD and TO220 Power MOSFETs in Power Electronics Application

This work presents a comparative evaluation of Surface Mount Device (SMD) and TO220 power MOSFETs for power electronics applications. The evaluation considers a commercial 1 kW line interactive UPS. A comprehensive database comprising 174 power MOSFETs for TO220 and SMD devices (DPAK, D2PAK, and SuperSO8) technologies is developed and used for analysis. The internal characteristics of the MOSFET technologies are compared. The cost and efficiency in full-bridge inverter used in the UPS under study is analyzed using the Pareto front. The results indicate that the SuperSO8 technology exhibits the best cost × efficiency relation. SuperSO8 and TO220 are similar in efficiency for lower-cost part numbers. Furthermore, TO220 showed better efficiency than D2PAK for lower-cost part numbers, but lower efficiency for higher-cost part numbers in Pareto front.