一种多源能量收集电源管理芯片  

A Multi-Source Energy Harvesting Power Management IC

作　　者：王世琛 张长春[1] 张翼[1] 张瑛[1] 袁丰[1] WANG Shichen;ZHANG Changchun;ZHANG Yi;ZHANG Ying;YUAN Feng(College of Integrated Circuit Science and Engineering,Nanjing Univ.of Posts and Telecommun.,Nanjing210023,P.R.China)

机构地区：[1]南京邮电大学集成电路科学与工程学院,南京210023

出　　处：《微电子学》2022年第5期824-831,共8页Microelectronics

基　　金：国家自然科学基金资助项目(62174090)。

摘　　要：采用高压0.6μm CMOS工艺,设计了一种可以同时对压电、光电进行高效收集的多源能量收集电源管理芯片。该收集芯片由光电接口电路、压电接口电路和DC-DC电路等单元构成。光电接口电路中采用全局最大功率追踪电路,减少了阴影对太阳能板收集光能的影响,提高了最大功率追踪效率。DC-DC电路中,采用导通时间可调、频率可调的控制模式,在更宽的输入功率范围内实现更高效率的同时保持输出端较小的电压纹波。仿真结果表明,该收集芯片的整体平均动态电流为7.6μA,能量转换效率最高为91.2%。版图尺寸为9 623μm×3 655μm。A multi-source energy harvesting power management chip was designed in a high-voltage 0.6 μm CMOS process, which could harvest piezoelectric energy and photovoltaic energy at the same time. The harvesting chip comprised a photovoltaic interface circuit, a piezoelectric interface circuit, and a DC-DC circuit. The global maximum power tracking circuit was used in the photovoltaic interface circuit to reduce the influence of shadows on the harvested photovoltaic energy of the solar panel and to improve the maximum power tracking efficiency. The DC-DC circuit used the control mode with adjustable on-time and frequency to achieve higher efficiency in the broader input power range while maintaining a more minor voltage ripple at the output. The simulation results show that the harvesting chip’s overall average dynamic current is 7.6 μA, and the energy conversion efficiency is the highest at 91.2%. The layout size is 9 623 μm×3 655 μm.

关 键 词：电源管理 能量收集 自适应导通时间 最大功率追踪 异步时钟信号控制 

分 类 号：TN86[电子电信—信息与通信工程] TN432