This evaluation board offers a solution for industrial power supplies fed by 3-phase mains. It takes advantage of the high-voltage MOSFET STW3N150 to optimize the operation of the quasi-resonant flyback converter based on the primary controller L6565. The STW3N150 is a 1500 V power MOSFET, designed with STMicroelectronics’ proprietary high-voltage MESH OVERLAY™ technology. This technology gives the switch such features as a very low RDS(on) per area, low gate charge and high switching performance. The evaluation board has been designed and developed to address low-power applications. It features two isolated outputs (12 V and 5 V) and is capable of delivering up to 10 W of output power.