A 2MHz 4-to-60VIN Buck-Boost Converter for Automotive Use Achieving 95% Efficiency and CISPR 25 Class 5 Standard

📋 论文概要

本文提出一种用于汽车应用的2MHz开关频率、4-60V宽输入范围的buck-boost转换器，实现了95%的峰值效率并满足CISPR 25 Class 5电磁兼容标准，解决了传统buck或boost转换器在宽输入电压下无法无缝模式转换及EMI问题。

💡 主要创新点

• 采用宽输入电压范围（4-60V）的buck-boost拓扑，实现输入高于、低于或等于输出时的无缝模式转换。
• 在2MHz高频开关下仍达到95%的峰值效率，兼顾小型化与高效能。
• 满足CISPR 25 Class 5严格的汽车EMI标准，无需额外屏蔽或滤波。

🏷 关键词

📄 原文摘要

High-voltage highly efficient switching power converters have gained high popularity in automotive applications. Powered by the car battery (VIN), the converters need to experience a wide VIN range from 4V to 60V under harsh coldcrank and load dump environments. This requires the converter to accomplish a fine output voltage (VOUT) regulation, seamless mode transition for VIN above, below or equal to VOUT. Conventional buck or boost converters can only achieve monotonic step-down or step-up conversion. Other solutions such as standalone boost and buck, or SEPIC converters [1,2] either require multiple cascaded power stages or suffer from lower system efficiency, larger footprint and higher bill-ofmaterial cost. The buck-boost converter thusly becomes a promising topology by its rather simple power-stage structure and wide conversion ratio [3-5]. However, the electromagnetic interference (EMI), power loss, and complicated control

👥 作者与机构

Jing Xue, Min Kyu Song, Xugang Ke, Min Chen, Leonard Shtargot

Analog Devices, Milpitas, CA