A Single-Cycle MPPT Charge-Pump Energy Harvester Using a Thyristor-Based VCO Without Storage Capacitor

📋 论文概要

该论文提出了一种单周期最大功率点跟踪（MPPT）电荷泵能量采集器，采用基于晶闸管的压控振荡器（VCO），无需存储电容。解决了传统可重构电荷泵缺乏启动和自维持能力的问题，实现了低功耗、高效率的能量采集。

💡 主要创新点

• 提出单周期MPPT算法，实现快速最大功率点跟踪而不需要外部存储电容。
• 采用基于晶闸管的VCO，能够在极低初始电压下自启动，确保能量采集器的自维持能力。
• 去除存储电容，减小芯片面积，适合物联网节点集成。

🏷 关键词

📄 原文摘要

The switched-capacitor power converter, also called a charge pump (CP), features no off-chip components and is suitable for the monolithic smart nodes in the internet of everything (IoE) [1]. To reduce the inevitable charge-redistribution loss (CRL) from a fixed conversion ratio (CR), reconfigurable CPs have been proposed to dynamically change their CRs for optimized harvesting efficiency [2,3]. However, they lacked the startup and self-sustaining capability [4], which are vital to the power-management unit for IoE. The clock generator of an energy harvester should oscillate with the initial low harvesting voltage. To realize the selfsustaining capability, the controller should rely on the harvested power of the CP, which implies an ultra-low power consumption. The conventional current-starved ring oscillator is not suitable for this microwatt power budget due to its correlated nature between speed, slew rate, and power consumption.

👥 作者与机构

Xiaosen Liu, Edgar Sanchez-Sinencio

Texas A&M University, College Station, TX