A 94.8%-Peak-Efficiency Double Step-Up SIBO Converter Achieving 88% Output Ripple Reduction for AMOLED Display

📋 论文概要

本文提出一种双升压单电感双输出（DSU-SIBO）转换器用于AMOLED显示。通过集成1:2电荷泵降低电感电流的直流与交流分量，实现94.8%峰值效率；采用2-out-of-3相能量传递方式，每个周期每输出获得两相能量，使输出纹波降低88%。

💡 主要创新点

• 首次将1:2电荷泵融入单电感双输出升压转换器，同时减小电感电流的DC和AC分量以提升效率。
• 提出2-out-of-3-phase能量传递控制策略，每个输出在每周期内接收两相能量，有效抑制输出纹波达88%。

🏷 关键词

📄 原文摘要

Abstract This paper presents a double step-up single-inductor bipolar-output (DSU-SIBO) converter for AMOLED displays. By employing a 1:2 charge pump, the proposed design reduces both DC and AC components of the inductor current, thereby minimizing loss and achieving a peak efficiency of 94.8%. With 2-out-of-3-phase energy delivery, each output receives energy during two phases per cycle, reducing output ripple by up to 88%. The prototype is implemented in a 180-nm BCD process. The growing demand for high-quality visual experiences has necessitated the use of highperformance and large-size AMOLED displays in portable devices, which require both positive and negative supply rails (VOP and VON). In this application, the power converter generating these supply rails must meet two key requirements: 1) high power efficiency for longer battery time and lower thermal dissipation, and 2) small output voltage ripple to

👥 作者与机构

Hyeon-Ji Choi, Joo-Mi Cho, Sang-Yun Nam, Sung-Wan Hong

Sogang University, Seoul, Korea