A 94.4% Peak Efficiency Coupled-Inductor Hybrid Step-Up Converter With Load-Independent Output Voltage Ripple

IF 5.6 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal of Solid-state Circuits Pub Date : 2024-12-11 DOI:10.1109/JSSC.2024.3510392

Peng Cao;Danzhu Lu;Jiawei Xu;Zhiliang Hong

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Abstract

This article introduces a coupled-inductor hybrid step-up converter (CIHSUC) designed for low-ripple power supply applications in battery-operated devices. The CIHSUC combines the advantages of both a boost converter and a KY converter by proposing a novel hybrid converter topology that connects the input and output terminals of the converter in series with the coupled-inductor, resulting in a high conversion ratio (CR) and load-independent ultra-low output voltage ripple. By utilizing a coupled inductor instead of two discrete inductors, the CIHSUC further reduces inductor current ripple, output voltage ripple, and system size. Furthermore,

$V^{2}I_{\text {C}}$

adaptive off-time (AOT) control method is proposed to enhance the transient response and loop stability. Fabricated in a

$0.18~\mu $

m BCD process, the converter achieves a peak efficiency of 94.4% at

${V_{\text {IN}}} =5$

${V_{\text {O}}} =12$

V and

${I_{\text {Load}}} =300$

mA. Additionally, the measured output voltage ripple remains below 20 mV within the input range of 2–5 V and the output range of 5–15 V, representing up to a

$6.6\times $

reduction compared to the theoretical optimum of a conventional boost converter.

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峰值效率为 94.4%、输出电压纹波与负载无关的耦合电感器混合升压转换器

本文介绍了一种耦合电感混合升压转换器（CIHSUC），用于电池供电设备的低纹波电源应用。CIHSUC结合升压变换器和KY变换器的优点，提出了一种新颖的混合变换器拓扑结构，将变换器的输入和输出端与耦合电感串联，从而实现高转换率（CR）和与负载无关的超低输出电压纹波。通过使用一个耦合电感而不是两个离散电感，CIHSUC进一步减少了电感电流纹波，输出电压纹波和系统尺寸。此外，提出了$V^{2}I_{\text {C}}$自适应off-time （AOT）控制方法，提高了系统的暂态响应和回路稳定性。在$0.18~\mu $ m的BCD工艺中，转换器在${V_{\text {in}}} =5$ V、${V_{\text {O}}} =12$ V和${I_{\text {Load}}}} =300$ mA时达到了94.4%的峰值效率。此外，在2-5 V的输入范围和5-15 V的输出范围内，测量到的输出电压纹波保持在20 mV以下，与传统升压变换器的理论最佳值相比，减少了6.6倍。

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来源期刊

IEEE Journal of Solid-state Circuits 工程技术-工程：电子与电气

CiteScore

11.00

自引率

20.40%

发文量

351

审稿时长

3-6 weeks

期刊介绍： The IEEE Journal of Solid-State Circuits publishes papers each month in the broad area of solid-state circuits with particular emphasis on transistor-level design of integrated circuits. It also provides coverage of topics such as circuits modeling, technology, systems design, layout, and testing that relate directly to IC design. Integrated circuits and VLSI are of principal interest; material related to discrete circuit design is seldom published. Experimental verification is strongly encouraged.