An Inductor-First Tri-Path Hybrid Buck Converter With Reduced Inductor Current Suitable for USB Power Delivery Adapter

IF 5.2 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems I: Regular Papers Pub Date : 2025-03-21 DOI:10.1109/TCSI.2025.3551087

Zhitong Chen;Yufei Sun;Xiaoya Fan;Yanzhao Ma

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引用次数: 0

Abstract

This paper presents an inductor-first tri-path (IFTP) buck converter suitable for USB power delivery adapter to charge 1-2 cell battery. The proposed topology adopts the inductor-first strategy and the tri-path strategy of one inductor path and two capacitor paths to extend the output voltage conversion range, realize the continuous input current, eliminate the input EMI noise, and reduce the inductor current. In addition, a phase-interleaved symmetric inductor-first tri-path (PIS-IFTP) buck converter is proposed to alleviate the inrush current in the flying capacitor under extreme duty cycle of IFTP converter, while further reducing inductor current ripple. Two experimental prototypes for 9 V input to 3-8.4 V ouput have been developed, demonstrating excellent ability of IFTP and PIS-IFTP topologies to reduce inductor current and achieve continuous input current over the whole duty cycle and load range. The experimental results validate that the prototypes provide a wide voltage conversion range of 1/3-1 and a maximum output current of 1.8 A. The peak efficiency of IFTP is 93% at

$V_{OUT} \,\, =6.6$

V, while the peak efficiency of PIS-IFTP is 94.5% at

$V_{OUT} \,\, =3.3$

查看原文本刊更多论文

电感优先的三路混合降压变换器，电感电流减小，适用于USB供电适配器

本文提出了一种电感优先三路（IFTP）降压转换器，适用于USB供电适配器为1-2节电池充电。所提出的拓扑结构采用电感优先策略和一个电感路径和两个电容路径的三路策略，以扩大输出电压转换范围，实现连续输入电流，消除输入EMI噪声，减小电感电流。此外，为了缓解IFTP变换器在极端占空比下飞行电容内的涌流，进一步减小电感电流纹波，提出了一种相交错对称电感优先三路降压变换器（PIS-IFTP）。在9 V输入到3-8.4 V输出的两个实验样机已经开发出来，证明了IFTP和PIS-IFTP拓扑在整个占空比和负载范围内减小电感电流和实现连续输入电流的出色能力。实验结果表明，样机的电压转换范围为1/3-1，最大输出电流为1.8 a。在$V_{OUT} \,\, =6.6$ V处，IFTP的效率峰值为93%；而在$V_{OUT} \,\, =3.3$ V处，PIS-IFTP的效率峰值为94.5%。

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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来源期刊

IEEE Transactions on Circuits and Systems I: Regular Papers 工程技术-工程：电子与电气

CiteScore

9.80

自引率

11.80%

发文量

441

审稿时长

2 months

期刊介绍： TCAS I publishes regular papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: - Circuits: Analog, Digital and Mixed Signal Circuits and Systems - Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic - Circuits and Systems, Power Electronics and Systems - Software for Analog-and-Logic Circuits and Systems - Control aspects of Circuits and Systems.