Piggybacked SC-on-CSCR: A Modular On-Chip Switched-Capacitor Converter for 12-to-60V Input 1.8-to-5V Output Achieving 5.67mW/mm2 Power Density and 71.5% Peak Efficiency

📋 论文概要

本文提出了一种名为piggybacked SC-on-CSCR的片上开关电容转换器，通过消除高压开关并联合利用MOM和MOS电容，实现了5.67mW/mm²的功率密度。该转换器采用模块化设计，支持12-60V宽输入和1.8-5V输出，峰值效率71.5%，并具备快速高压启动保护功能，适用于电动汽车等低压电源场景。

💡 主要创新点

• 提出piggybacked SC-on-CSCR结构，通过消除高压开关和联合利用MOM与MOS电容，显著提高了功率密度。
• 采用芯片级模块化设计，支持宽输入电压范围（12-60V）和可调输出电压（1.8-5V），增强了系统灵活性。
• 实现全软充电操作，将峰值效率提升至71.5%，并集成快速高压启动保护电路，适应20V/ms的电压斜坡。

🏷 关键词

📄 原文摘要

Abstract This paper presents an on-chip switched-capacitor converter, named piggybacked SC-onCSCR, featuring: 1) a power density of 5.67mW/mm2 enabled by eliminating high-voltage switches and jointly utilizing MOM and MOS capacitors; 2) a 12-to-60V input and 1.8-to-5V output achieved through a chip-level modular design; 3) 71.5% peak efficiency enabled by full soft-charging operation; and 4) fast high-voltage startup protection, verified under a 20V/ms power-on slope. Electric vehicles (EVs) rely heavily on batteries, with typical voltage rails of 12V, 24V, 48V, and 60V [1-3]. Many low-power auxiliary electronics, such as battery and environmental sensors, can be directly powered from these rails without burdening the main converter. Switched-capacitor (SC) DC-DC converters are attractive for this task due to their compactness and full integrability [4-8]. However, conventional SC topologies face

👥 作者与机构

Yunzhe Yang1, Xin Zhang2, Sijun Du1

Delft University of Technology, Delft, The Netherlands, 2IBM T. J. Watson Research Center, Yorktown Heights, NY