A 3-to-5V Input 100Vpp Output 57.7mW 0.42% THD+N Highly Integrated Piezoelectric Actuator Driver

📋 论文概要

本文提出了一种高度集成的压电致动器驱动器，能够在3-5V输入下产生100Vpp输出，功耗57.7mW，THD+N仅0.42%。解决了从低压电源高效产生低失真高压波形的问题，适用于触觉反馈、冷却风扇等应用。

💡 主要创新点

• 实现了从低压（3-5V）到高压（100Vpp）的高效转换，同时保持极低的THD+N（0.42%）。
• 高度集成设计，减少了外部元件数量，适合小型化应用。
• 针对压电致动器的低频率需求优化，兼顾了效率和线性度。

🏷 关键词

📄 原文摘要

Piezoelectric actuators are used in a growing range of applications, e.g., haptic feedback systems, cooling fans, and microrobots. However, to fully realize their potential, these actuators require drivers able to efficiently generate high-voltage (>100Vpp) low frequency (<300Hz) analog waveforms from a low-voltage source (3-to-5V) with small form factor. Certain applications, such as piezoelectric (PZT) cooling fans, further demand low distortion waveforms (THD+N < 1%) to minimize sound emission from the actuator. Existing solutions for small PZT drivers typically rely on designs comprising a power converter to step up a low voltage followed by a high-voltage amplifier [1,2,3]. Although envelope tracking can help reduce amplifier power [3], none of these designs can recover the energy stored on the actuator to maximize efficiency. And while a differential bidirectional flyback converter [4] can recover energy, it requires four inductors, thereby

👥 作者与机构

Simon Chaput, David Brooks, Gu-Yeon Wei

Harvard University, Cambridge, MA