Human-Body-Coupled Power-Delivery and AmbientEnergy-Harvesting ICs for a Full-Body-Area Power Sustainability is performed for bulk connection with the VRECT and GND at input amplitude higher than 0.6V, so that the body diode forward biasing is aligned with the conduction path. As a result, at 5V TX swing, 3.5μW power is recovered from ankle to forehead (160cm), successfully covering the whole body.

📋 论文概要

本文提出了一款用于全身区域功率可持续性的双模式升降压转换器(DM-BBC)芯片，能够同时支持人体耦合功率传输和环境能量收集。该芯片通过最大功率点跟踪(MPPT)自适应地处理宽范围的阻抗变化（10-50kΩ和150-300kΩ），解决了不同模式下最优阻抗差异大的问题。

💡 主要创新点

• 提出了一种双模式升降压转换器(DM-BBC)，能够在人体耦合功率传输和环境能量收集两种模式下高效工作。
• 集成了自适应最大功率点跟踪(MPPT)技术，可应对环境寄生和路径阻抗变化导致的宽范围最优阻抗。

🏷 关键词

📄 原文摘要

Miaolin Zhang1, Han Wu1, Lian Zhang1, Joanne Si Ying Tan1, Jerald Yoo1,2 Figure 34.5.4 shows the proposed Dual-Mode Buck-Boost Converter (DM-BBC). Due to the unpredictability of the environmental parasitic and the variations introduced by path impedance, the maximum power point varies over time, environment and placement, therefore maximum power point tracking (MPPT) is essential. While the optimal impedance range for the body-coupled power delivery is measured to be from 10-to-50k&, for the ambient energy harvesting, the range is 150-to-300k&. For such large variation and difference in optimal impedance range, implementing a large T1 (inductor charging phase) span degrades the impedance resolution and settling time when switching between the modes. Therefore, the DM-BBC utilizes the T0 (the DCM time in conventional Buck-Boost Converters) to fast settle down to the mean MPP first, after which the impedance

👥 作者与机构

Jiamin Li*1, Yilong Dong*1, Jeong Hoan Park1, Longyang Lin1, Tao Tang1,