智能功率集成电路中的集成正负低压电源的研究

Smart Power ICs (SPICs) is used widely in broad market and is one of the most popular research fields of power semiconductors. However, in Chinese market, the SPICs mainly rely on imports. Therefore, to develop our own independent intellectual property rights of SPICs with related technologies and products is now imminent. To ensure the normal operation of the low-voltage integrated circuits of SPICs, the approaches both at home and abroad are through an external circuit to convert high voltage into low-voltage power supply or directly through an external battery to provide energy, both methods not only increase the volume of power electronic systems, but also increase the application cost of SPICs and reduce the reliability. In order to solve the above shortcomings, this project aims to develop low-cost SPICs with independent intellectual property rights, and both positive and negative low-voltage power supplies are integrated in the SPICs. The project will develop a low-cost CMOS-compatible process, design OPTimization Varied Lateral Doping (OPT-VLD) LDMOS device and the integrated low-voltage power supply bade on physical mechanisms of power semiconductor devices. The high efficiency positive and negative low voltage power supply converting circuit and processing circuit in SPICs also will be designed. The implement of this project has important significance for developing cost-effective SPICs with independent intellectual property rights.

智能功率集成电路(SPICs)是功率半导体领域最为活跃的研究方向之一，市场广阔、应用广泛，而我国目前主要依赖进口，发展我国自主知识产权的SPICs相关技术和产品已迫在眉睫。为保证SPICs中的低压集成电路的正常工作，目前国内外的方法均是通过外部电路将高压电源变为低压电源或直接用外部电池来为其提供电能，不仅增大了电力电子系统的体积，还增加了SPICs的应用成本并降低了可靠性。本项目旨在研发一种低成本的集成于SPICs内的正、负低压电源，从而解决上述问题。本项目将开发与CMOS兼容的低成本工艺，并从功率半导体器件的物理机制出发，基于自主知识产权设计横向优化变掺杂（OPT－VLD）LDMOS器件及与其集成的低压电源，并设计出正负低压电源的高效转换及处理的CMOS电路，以满足SPICs中低压电路的电源要求。本项目的开展将对发展自主知识权、高性价比的SPICs具有重要意义。

为解决智能功率集成电路（SPICs）中的低压电路的自供电难题，对基于自主知识产权的高压功率器件中产生可集成的低压电源的理论进行了研究，并进行了流片实验，实验验证结果表明，该理论具有可行性，为该理论的进一步应用奠定了基础；在项目的执行过程中，发明了一种新型的正电源转负电源的技术理论并进行了研究，仿真分析和流片实验结果表明，该技术具有可行性，为该理论的进一步应用奠定了基础；与此同时该专利还发明了一种负电源转正电源的电路；提出了两种具有较高温度稳定性的新型稳压电路（正电源稳压电路和负电源稳压电路），并完成了仿真和实验研究。在本项目的支持下，申请了中国专利2项，在国际刊物上发表的主要论文共有7篇（其中SCI论文4篇，IEEE国际会议论文3篇）。本项目的实施和所产生的研究成果表明，该项目具有市场应用价值和学术价值。