Owing to the energy shortage and the rising awareness of environment protection, not only makes people pay attention to energy saving issue, but jointly affect the development trend of power electronic industries. According to the roadmapof power electronics industries, it includes improving energy conversion efficiency, decreasing components and increasing power density. In this session, we will focus on the study and presentation of high power density isolated/ non-isolated powerconversion techniques for information technology, electric vehicles, and renewable energy applications.