低功耗高性能能量自激型电源管理集成电路

项目名称： 低功耗高性能能量自激型电源管理集成电路

项目编号： No.61204035

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 郭建平

作者单位： 中山大学

项目金额： 32万元

中文摘要： 无线电源传输越来越广泛应用于电池因尺寸、使用寿命及成本控制等因素而无法或不便使用的系统中，如医疗植入器件、无源射频识别标签及无线传感器节点等。在这些称之为能量自激型的无线供电设备中，电源管理成为影响系统性能的关键因素。围绕实现低输入电压、高转换效率这一目标，对AC-DC整流器电路各种拓扑结构进行深入细致的理论研究，总结影响转换效率及输入电压受限等问题，设计出新型低电压高效率的整流电路。针对超低功耗的DC-DC稳压电路，研究无需外部电容补偿的全集成线性稳压电路。通过数字化检测动态偏置电路，使稳压电路能够在极低功耗下获得良好的瞬态响应能力，且无需RC高通滤波电路，大大节省了芯片面积。采用嵌入式电源纹波前馈通路，在无额外静态功耗下获得高电源纹波抑制（PSRR）能力。设计的低电压高效率整流器及全集成快速高PSRR线性稳压器将在（深）亚微米CMOS下流片验证，并形成电源芯片IP，直接面向产业界应用。

中文关键词： 低功耗能量自激系统；电源管理集成电路；交流-直流转换；低压差线性稳压器；单电感多输出直流-直流转换器

英文摘要： Wireless transmission of power is more and more popular in applications where batteries cannot be used due to size, lifetime, or cost constraints. Passive radio frequency identification (RFID), implantable microelectronic devices, and wireless sensor nodes are some of the examples. These so-called energy-autonomous systems usually induce an AC power carrier signal through a pair of tuned inductively-coupled coils. A rectifier follows the receiver LC-tank circuit to convert the AC carrier signal to a DC voltage, which supplies the rest of the system after being regulated by a low-power low-dropout (LDO) regulator. The small coupling coefficient between the two coils, particularly when they are misaligned, is the bottleneck in inductive power transmission. On the other hand, the performances such as transient response and power supply ripple rejection (PSRR) of LDO regulator are often limited by its ultra-low quiescent current. This project targets for low-voltage high-efficiency rectifier and fully integrated low-power LDO regulator with fast transient response and high PSRR. Different state-of-the-art topologies of rectifier will be analyzed and the power efficiency will be modelled with mathematical methods. Digital-controlled dynamic biasing technique will be proposed and implemented to enhance the transient r

英文关键词： low-power energy-autonomous system；power-management integrated circuits；AC-DC converter；LDO regulator；SIMO DC-DC regulator