高集成度非隔离式AC-DC变换器芯片关键技术研究

随着5G和物联网的发展，智能家居和办公设备的高速增长带来了对电源管理芯片需求的大幅增加，特别是对高集成度、高效率和低成本的非隔离式AC-DC变换器芯片需求迫切。传统AC-DC变换器由于需要直接处理高压交流电，整流器部分难以实现片上集成和小型化。同时，后级DC-DC要处理高电压差，大幅降低了系统效率。因此，本项目拟围绕非隔离式AC-DC变换器研究提高集成度和系统效率的关键技术。（1）提出高集成度的非隔离式AC-DC变换器的架构，提出可在BCD工艺下实现的电路方案；（2）提出片上主动型AC-DC整流器结构和输出电压的控制方案，提出有源二极管和高边NMOS的电路设计方法；（3）提出高集成度、高效率的具有高电压变换比的DC-DC变换器架构。此项目的开展将为打破现有AC-DC变换器的体积限制，进一步提升系统集成度，系统效率提供新思路和解决方案。

With the development of 5G and the Internet of Things, the rapid growth of smart homes and smart office devices has brought an urgent demand in power management integrated circuits(IC), especially the non-isolated AC-DC converters with high integration levels, miniaturization, high efficiency, and low cost. Because the traditional AC-DC converters need to directly process the AC mains, it is not feasible to fully integrate the rectifier on-chip. At the same time, the step-down DC-DC converter has to deal with a very high voltage conversion ratio, which significantly reduces the system efficiency...Therefore, the target of this project to study the key technologies of non-isolated AC-DC converters to improve integration and achieve high efficiency. In detail, we will (1) Propose a highly integrated non-isolated AC-DC converter architecture, develop an equivalent model, and propose the circuitry that can be implemented in the BCD process; (2) Propose an on-chip active AC-DC rectifier structure and output voltage control scheme, propose a circuit design method of the active diode and high-side NMOS; (3) propose highly integrated, high-efficiency DC-DC converter with high voltage conversion ratio...The goal of this project is to provide new concepts and solutions to break the volume limitation of the AC-DC converter and improve the system integration level and system efficiency.