A 0.45-to-3V Reconfigurable Charge-Pump Energy Harvester with Two-Dimensional MPPT for Internet of Things

📋 论文概要

本文提出了一种适用于物联网的可重构电荷泵能量收集器，通过二维最大功率点跟踪（MPPT）技术，实现了0.45V至3V的宽输入电压范围，解决了传统单转换比电荷泵因输入范围窄导致的电荷再分配损失问题。

💡 主要创新点

• 提出可重构电荷泵结构，支持宽输入电压范围（0.45V-3V），适应不同能量源和环境变化。
• 引入二维MPPT技术，同时优化转换比和开关频率，提升能量收集效率。

🏷 关键词

📄 原文摘要

Compared with inductive DC-DC boost converters [1], the charge pump (CP) features no off-chip inductors and is suitable for monolithic low power energy harvesting applications such as Internet of Things (IoT) smart nodes. However, the single conversion ratio (CR) CP has a narrow input voltage range. This induces a charge redistribution loss (CRL) and becomes a bottleneck preventing highly efficient energy harvesting [2]. CRL stems from two facts: 1) The operating voltages of energy sources vary with environment, and 2) Different energy sources feature a wide range of output voltages. By tuning the CR as one dimension, reconfigurable CPs can eliminate CRL; however, they need complex control algorithms, lack maximum power point tracking (MPPT) [3], and only provide fractional ratios [4]. Thus, they are not preferable for energy harvesting from various sources. Due to the environment-dependent characteristics of energy sources, utilizing

👥 作者与机构

Xiaosen Liu, Edgar Sanchez-Sinencio

Texas A&M University, College Station, TX