A 98.2%-Efficiency Reciprocal Direct Charge Recycling Inductor-First DC-DC Converter

📋 论文概要

本文提出了一种互易直接电荷回收电感优先DC-DC转换器，通过创新的电荷回收技术解决了小型化电感转换器中导通损耗与开关损耗之间的权衡问题，实现了98.2%的高效率。

💡 主要创新点

• 提出互易直接电荷回收技术，有效回收栅极驱动能量，降低开关损耗。
• 采用电感优先架构，优化电感电流路径，减少导通损耗。

🏷 关键词

📄 原文摘要

Inductive DC-DC converters are fundamentally limited by the trade-off between conduction losses and switching losses. Miniaturized converters used in applications such as mobile devices suffer badly from this trade off, as a small inductor has a large DCR, which contributes large I2RDCR conduction losses, while a small inductance desires high frequency operation, which implies high CGATEV2f hard charging switching losses from the power MOSFET gate drivers. Interestingly, the rise/fall time of such drivers cannot be too rapid, regardless of switching frequency, due to inductive ringing causing potential voltage stresses [1,2]. To ease the conduction/switching loss trade-off, it is possible to exploit the requirement for finite rise/fall time by replacing conventionally hard-switching gate drivers with adiabatic charge-recycling (CR) gate drivers. As depicted in Fig. 17.5.1 (top right), CR can, through the help of inductor LR, recycle the

👥 作者与机构

Abdullah Abdulslam, Patrick P. Mercier

University of California, San Diego, La Jolla, CA