Double DPAK (DDPAK) Innovative top-side cooled SMD solution for high power applications Infineon Technologies introduces Double DPAK (DDPAK), the first top-side cooled surface mount device (SMD) package addressing high power SMPS applications such as PC power, solar, server and telecom. The benefits of the already existing high voltage technology 600V CoolMOS™ G7 superjunction (SJ) MOSFET is combined with the innovative concept of top-side cooling, providing a system solution for high current hard switching topologies such as PFC and a high-end efficiency solution for LLC topologies.