A 92.7% Peak Efficiency 12V-to-60V Input to 1.2V Output Hybrid DC-DC Converter Based on a Series-Parallel-Connected Switched Capacitor

📋 论文概要

该论文提出了一种基于串联-并联连接开关电容和电感网络的混合DC-DC转换器，解决了汽车应用中超低电压转换比（VCR）降压转换器因高压输入导致的器件体积大、寄生大的问题。实现了12V至60V输入到1.2V输出的高效转换，峰值效率达到92.7%。

💡 主要创新点

• 提出串联-并联连接的开关电容和电感网络架构，实现超低电压转换比（从60V降至1.2V）。
• 通过新型拓扑降低高压开关和电容的电压应力，避免使用大体积高耐压器件，减小寄生效应。
• 在宽输入电压范围（12V-60V）内保持高效率，峰值效率达92.7%。

🏷 关键词

📄 原文摘要

automotive applications for a higher efficiency power system. Accordingly, an ultra-low voltage-conversion-ratio (VCR) buck converter is in great demand. Previous ultra-low VCR buck converters use flying capacitors (CFs) and power switches between the battery and the inductor, as shown in Fig. 8.7.1 (top-right) [1–6]. In these topologies, CFs reduce the voltage stress applied to switches by dividing the Vbat, which has four major weak points. First, because of the high Vbat, CFs and switches are used as high-voltage (HV) capacitors and LDMOSs, respectively, which are bulky and have larger parasitic components resulting in huge power loss compared to a low-voltage (LV) capacitor and CMOS. If compound semiconductors, such as GaN and SiC, are used, the power loss caused by switches can

👥 作者与机构

Hyeon-Ji Choi1, Chan-Ho Lee1, Young-Jun Jeon1, Hyeonho Park1,

Jeong-Hun Kim1, Young-Jin Woo2, Ju-Pyo Hong2, Haifeng Jin2, Sung-Wan Hong1 Sogang University, Seoul, Korea LX Semicon, Seoul, Korea 1 2 The battery voltage (Vbat) is becoming higher in