GaN Bidirectional Switches: Device Technology, Applications, and Future Prospects

Innovations in power semiconductors have long been, and will continue to be, the driving force behind advancements in power electronics. Among the latest breakthroughs, the advent of the monolithically integrated gallium nitride (GaN) bidirectional switch (BDS) marks a significant milestone. For the first time, the long-sought “AC switch” has become a reality, delivering tangible improvements in efficiency, density, reliability, and cost effectiveness. This paper offers key insights into the emerging GaN BDS technology and addresses critical knowledge gaps in its evolution from concept to realization. The diverse application space of GaN BDS is explored, highlighting its potential to both revolutionize existing solutions and enable innovative circuit architectures. Furthermore, this paper shares a forward-looking industry perspective, outlining the challenges and opportunities that lie ahead. As the journey to unlock the full potential of the GaN BDS technology begins, the future of power electronics holds immense promise for new paradigms and discoveries.