A 2-Output Step-Up/Step-Down SwitchedCapacitor DC-DC Converter with 95.8% Peak Efficiency and 0.85-to-3.6V Input Voltage Range

📋 论文概要

提出了一种双输出升降压开关电容DC-DC转换器，在0.85至3.6V宽输入电压范围内实现了95.8%的峰值效率，解决了传统开关电容转换器因离散转换比导致效率受限的问题。

💡 主要创新点

• 采用双输出架构，同时支持升压和降压功能，提高系统集成度。
• 通过多模式转换比切换，在宽输入电压范围内保持高效率，峰值效率达95.8%。

🏷 关键词

📄 原文摘要

Switched-capacitor (SC) DC-DC converters have gained attention based on their ability to offer a low-cost high-efficiency power conversion, and allow a thin and compact module packaging [1]. However, the SC DC-DC converter offers high efficiency only in a limited input/output voltage range, since it is inherently based on a discrete conversion ratio, which is different from an inductor-based DC-DC converter with a continuous conversion ratio. [2,3] proposed implementing multiple conversion ratios with several SC DC-DC units connected in series. However, these lead to a degradation of the efficiency as well as the maximum current capacity, worse for the conversion ratios that have more stages. On the other hand, there is a lack of a step-up and step-down SC topology, which will further expand the input/output voltage range, and enable using different types of power sources (alkaline, lithium-ion battery, etc.), for portable devices. [4] and

👥 作者与机构

Chen Kong Teh, Atsushi Suzuki

Toshiba, Kawasaki, Japan