Trans- Inductors versus Discrete Inductors in Multiphase Voltage Regulators: An Analytical and Experimental Comparative Study

2023 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2023-03-19 DOI:10.1109/APEC43580.2023.10131428

Amin Y. Fard, Satya Naidu, Horthense Tamdem, B. Vafakhah

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Abstract

Traditionally, in the microprocessor industry, multiphase Voltage Regulators (VRs) are implemented with discrete non-coupled inductors in each phase. Recently, Trans-Inductor Voltage Regulators (TLVRs) have been proposed in the literature where the discrete inductors are replaced with transformers while all of their secondary windings are connected in series with a compensating inductor. Any sudden changes in phase currents will enable remaining phases to contribute during load transients improving the overall VR transient capability which decreases decoupling solution requirement of the converter. Although TLVR solutions have been widely adopted in XPU (CPU or GPU) industry, still there is a lack of in-depth analysis and comparative study in regard to the conventional discrete solutions. This paper aims to provide a holistic analytical and experimental comparative study over conventional discrete multiphase VRs versus TLVRs from various viewpoints, such as design, performance (steady state and transient), bandwidth, efficiency, power delivery (single-sided versus dual-sided), and cost.

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多相稳压器中的反式电感与分立电感:分析与实验比较研究

传统上，在微处理器工业中，多相电压调节器(VRs)在每一相都使用离散的非耦合电感来实现。最近，在文献中提出了反电感式稳压器(TLVRs)，其中离散电感器用变压器代替，而所有二次绕组都与补偿电感串联连接。任何相位电流的突然变化都将使剩余的相位在负载瞬态期间做出贡献，从而提高整体VR瞬态能力，从而降低转换器的解耦解决方案要求。虽然TLVR解决方案在XPU (CPU或GPU)行业中得到了广泛的应用，但目前还缺乏对传统离散解决方案的深入分析和比较研究。本文旨在从设计、性能(稳态和瞬态)、带宽、效率、功率输出(单面与双面)和成本等多个角度对传统离散多相vr和tlvr进行全面的分析和实验比较研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2023 IEEE Applied Power Electronics Conference and Exposition (APEC)

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