A High-Conversion-Ratio and 97.4% Peak-Efficiency 3-Switch Boost Converter with Duty-Dependent Charge Topology for 1.2A High Driving Current and 20% Reduction of Inductor DC Current in MiniLED Applications

📋 论文概要

针对miniLED多通道驱动需要高电压（30V）和大电流（1.2A）升压转换器的需求，提出一种三开关升压转换器，采用占空比相关电荷拓扑，实现了高转换比和97.4%的峰值效率。

💡 主要创新点

• 提出了一种三开关升压转换器结构，通过占空比相关电荷拓扑优化电荷传输，实现了高转换比（6V至30V）和高效率。
• 设计采用占空比自适应控制，在不同工作条件下保持高效率，峰值效率达97.4%。
• 能够支持高达1.2A的输出电流，满足miniLED阵列的高亮度需求。

🏷 关键词

📄 原文摘要

Chin-Hsiang Liang1, Kai-Syun Chang1, Kai-Cheng Chung1, Ke-Horng Chen1, Ying-Hsi Lin2, Shian-Ru Lin2, Tsung-Yen Tsai2 National Chiao Tung University, Hsinchu, Taiwan, Realtek Semiconductor, Hsinchu, Taiwan 1 2 Today’s miniLED displays can be divided into multiple arrays. Each miniLED array with 900 pixels can have 60 channels where each channel has 15 LEDs connected in series. To drive multi-channel miniLEDs in parallel from a low input voltage VIN (= 6V), a boost converter with high output voltage (up to 30V) and high output current (up to 1.2A for 2000 nits) is required where the conversion ratio (CR=VOUT/VIN) is 5. Since the inductor current IL = ILOAD / (1-D) of the conventional 2-switch (2S) boost converter is high, where ILOAD is the load current and D is the duty cycle, 2S boost converters have low efficiency and high output voltage ripple. Although the boost converter assisted by a series flying

👥 作者与机构

Yen-An Lin1, Si-Yi Li1, Zheng-Lun Huang1, Chong-Sin Huang1,