A 91.25% Peak Power-Conversion-Efficiency Capacitive PowerManagement IC Supporting up to 5.68mJ Burst Energy Delivery Using a Single External Capacitor for mm-Scale IoT Applications

📋 论文概要

该论文提出了一种电容式电源管理IC，旨在解决微小型化物联网设备中高内阻电池的负载驱动能力不足问题。通过实现91.25%的峰值功率转换效率并支持高达5.68毫焦耳的脉冲能量传输，有效缓解了系统峰值功耗与电池放电能力之间的矛盾。

💡 主要创新点

• 提出一种高效率电容式电源管理架构，实现91.25%的峰值功率转换效率，显著优于传统线性或电感式方案。
• 支持高达5.68mJ的突发能量传输能力，适用于无线数据传输等高瞬时功耗场景。
• 通过优化电容充放电控制策略，克服了高内阻电池的驱动限制，提升了整体系统能量可用性。

🏷 关键词

📄 原文摘要

Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 As Internet of Things (IoT) devices continue to shrink in size, the limited available system energy is becoming a major bottleneck. Even though the system power of miniaturized IoT devices can be reduced down to the sub-μW level, the peak system power consumption (e.g., during wireless data transmission) can increase up to the mW level. Despite the enhanced energy density and safety, the existing mm-scale solid-state batteries still fall short in their load driving capability due to the high internal resistance (e.g., RIN~200Ω with a peak pulse energy of 4.8μJ in [1]), directly limiting the burst system power requirement. To increase the output driving capability, the conventional approach is to employ a large storage capacitor CSTO [2]. However, due to the lack of reconfiguration flexibility of CSTO, only ~2% of the stored energy can be utilized to ensure a negligible supply voltage drop.

👥 作者与机构

Qishen Fang1, Feiyu Li1, Rui P. Martins1,2, Man-Kay Law1

University of Macau, Macau, China