An 11MHz Fully Integrated 5kV Isolated DC-DC Converter Without Cross-Isolation-Barrier Feedback

📋 论文概要

该论文提出了一种全集成、11MHz开关频率、5kV隔离电压的DC-DC转换器，无需跨隔离屏障的反馈路径，解决了传统隔离电源需要外部元件或跨隔离反馈的问题。

💡 主要创新点

• 实现了全集成隔离DC-DC转换器，无需外部电感或跨隔离屏障反馈，简化了系统设计。
• 采用片上电容或微变压器实现5kV高电压隔离，同时保持11MHz的高开关频率。

🏷 关键词

📄 原文摘要

University of Electronic Science and Technology of China, Chengdu, China 1 2 Galvanic isolation greatly enhances system safety and reliability in applications such as medical devices and sensor interfaces. In these applications, space restriction is stringent and full integration is preferred. Several galvanically isolated power-transfer systems using on-chip capacitors or micro transformers have been reported [1-4]. In [1], isolated power transfer is achieved with on-chip capacitors, which are CMOS compatible. However, an off-chip inductor is needed in the power link. In addition, it is difficult for an on-chip-capacitor-based powertransfer system to achieve high isolation voltage and high output power at the same time with a reasonable silicon area. Coreless-micro-transformer-based power-transfer systems [2-3] operate at 160 to 330MHz with coil inductance of 10s of nH. It is very difficult to boost the efficiency at such high operation

👥 作者与机构

Lisong Li1, Xiangming Fang1, Rongxiang Wu2

CoilEasy Technologies, Chongqing, China