A 2-Phase Soft-Charging Hybrid Boost Converter with Doubled-Switching Pulse Width and Shared Bootstrap Capacitor Achieving 93.5% Efficiency at a Conversion Ratio of 4.5 and vice versa in state-2 (at t3). As VDR34 is reused to charge C5 and C6, an additional drop on VDR34 will occur at t1 and t3. However, thanks to the proposed topology, M5 and M6 are relatively small since they have low voltage stress and small high-side (HS) currents (to be explained next). This reduces both the sizes of C5 and C6, and the VDR34 drop.

📋 论文概要

提出了一种具有双倍开关脉宽和共享自举电容的2相软充电混合升压转换器，通过软充电技术和降低电感电压摆幅来减小电感DCR损耗，从而降低电感体积和成本。

💡 主要创新点

• 采用2相软充电混合架构，有效减小电感电压摆幅，降低电感DCR损耗。
• 实现双倍开关脉宽，提高转换效率。
• 共享自举电容器设计，减少外部元件数量。

🏷 关键词

📄 原文摘要

Figure 11.5.4 normalizes the power losses of the proposed HB to those of a 2PCB, with CR=4.5. We choose both the same inductor DCR and switch on-resistance (RON) for the two topologies. However, all the switches in 2P-CB should use 20V devices. The calculated inductor DCR loss in the proposed design is lower than that of a 2P-CB, because the ripple of IL decreases with a smaller inductor voltage swing. This relaxes the inductor DCR requirement, reducing the inductor volume and cost. Thus, in the proposed design, we use 3.3μH inductors in 3010 package with a DCR of 166m', instead of a 4020 package with a DCR of 38m'. Although we use two HS switches M3(M4) and M5(M6) in each phase, the summed conduction loss is still lower since they only conduct half of IL with a reduced current ripple. However, the conduction loss of the low-side (LS) switches M1 and M2 is thereby higher. Since the HS root-mean-square (RMS)

👥 作者与机构

Mo Huang1,2, Yan Lu1, Rui P. Martins1,3