隔离DC-DC转换器在恶劣的工业环境中，对系统的安全和可靠性有着至关重要的作用，近年来得到学术界和工业界的高度关注。传统的隔离DC-DC转换器都是通过应用级降低EMI辐射，大大增加了设计成本并且难以实现高效率。因此从器件级降低隔离DC-DC转换器EMI辐射具有重要的研究意义。本项目将在前期基于FOWLP封装的隔离DC-DC转换器的研究基础上，围绕降低隔离DC-DC转换器EMI辐射的新架构和新电路展开深入研究。首先，将探索并提出一种全集成低EMI的隔离DC-DC转换器架构，构建低EMI的对称式互补型功率级架构的理论模型，并阐明其工作机理；其次将研究封装级变压器中高共模电流和低效率的问题，并完成变压器建模和设计；最后，实现隔离DC-DC转换器的芯片和封装设计，并经测试验证，得到一套完整的低EMI隔离DC-DC转换器的分析与设计方法，推动全集成隔离DC-DC芯片设计技术的发展。

Isolated DC-DC converter is essential to guarantee system safety and reliability in harsh industry environments, which attracts extensive attention from both academia and industry recently. Conventional isolated DC-DC converters reduce EMI radiation in the application-level, which greatly increases the design cost and it is difficult to achieve high efficiency. Therefore, it is very attractive for isolated DC-DC converter to reduce EMI radiation in the component-level. Based on the previous research done in FOWLP isolated DC-DC converter, this project will study the new topology and the new circuits in designing an isolated DC-DC converter with EMI-mitigation. Firstly, we will explore and propose a fully integrated low-EMI isolated DC-DC converter architecture, and build a theoretical model of low-EMI symmetrical complementary power stage architecture to explain its working principle. Then, we will study the problem of high common-mode current and low efficiency for transformer in package, and complete transformer modeling and design. Finally, we will complete the whole chip design with silicon and package verification. It is expected that a complete design methodology on low-EMI isolated DC-DC converter will be built in this project to promote the development of design techniques for isolated DC-DC ICs.