A Four-Phase Hybrid Step-Up/Down Converter with RMS Inductor Current Reduction and Delay-Based Zero-Current Detection

Inho Park; Junyoung Maeng; Jinwoo Jeon; Hyunjin Kim; Chulwoo Kim

doi:10.1109/TPEL.2021.3120988

A Four-Phase Hybrid Step-Up/Down Converter with RMS Inductor Current Reduction and Delay-Based Zero-Current Detection

Inho Park
, Junyoung Maeng
, Jinwoo Jeon
, Hyunjin Kim
, Chulwoo Kim^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

In this letter, a four-phase hybrid step-up/step-down dc-dc converter with a delay-based zero-current detector (ZCD) is proposed. The proposed power stage operates in step-up or step-down mode depending on the target output voltage. It utilizes hybrid switched-inductor-capacitor and dual-path topologies with multiphase operation to reduce conduction loss due to the dc resistance of the inductor by reducing the rms inductor current (IL). The delay-based ZCD determines the zero-current point of IL with a five-bit binary signal to compensate for the propagation delay between the control and the output signals of the driver. The system is fabricated using 180-nm CMOS technology. The power density is 1.838 A/mm2, and the peak efficiency is measured at 89.49% and 86.83% in the step-down and step-up mode, respectively, with a load current range of up to 2 A.

Original language	English
Pages (from-to)	3708-3712
Number of pages	5
Journal	IEEE Transactions on Power Electronics
Volume	37
Issue number	4
DOIs	https://doi.org/10.1109/TPEL.2021.3120988
Publication status	Published - 2022 Apr 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government [Ministry of Science and ICT (MSIT)] under Grant 2019R1A2B5B03100756.

Publisher Copyright:
© 1986-2012 IEEE.

Keywords

Continuous output delivery current
hybrid buck-boost converter
multiphase dc-dc converter
rms inductor current reduction
zero-current detector (ZCD)

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/TPEL.2021.3120988

Cite this

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title = "A Four-Phase Hybrid Step-Up/Down Converter with RMS Inductor Current Reduction and Delay-Based Zero-Current Detection",

abstract = "In this letter, a four-phase hybrid step-up/step-down dc-dc converter with a delay-based zero-current detector (ZCD) is proposed. The proposed power stage operates in step-up or step-down mode depending on the target output voltage. It utilizes hybrid switched-inductor-capacitor and dual-path topologies with multiphase operation to reduce conduction loss due to the dc resistance of the inductor by reducing the rms inductor current (IL). The delay-based ZCD determines the zero-current point of IL with a five-bit binary signal to compensate for the propagation delay between the control and the output signals of the driver. The system is fabricated using 180-nm CMOS technology. The power density is 1.838 A/mm2, and the peak efficiency is measured at 89.49\% and 86.83\% in the step-down and step-up mode, respectively, with a load current range of up to 2 A.",

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author = "Inho Park and Junyoung Maeng and Jinwoo Jeon and Hyunjin Kim and Chulwoo Kim",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government [Ministry of Science and ICT (MSIT)] under Grant 2019R1A2B5B03100756. Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

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AU - Kim, Hyunjin

AU - Kim, Chulwoo

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government [Ministry of Science and ICT (MSIT)] under Grant 2019R1A2B5B03100756. Publisher Copyright: © 1986-2012 IEEE.

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N2 - In this letter, a four-phase hybrid step-up/step-down dc-dc converter with a delay-based zero-current detector (ZCD) is proposed. The proposed power stage operates in step-up or step-down mode depending on the target output voltage. It utilizes hybrid switched-inductor-capacitor and dual-path topologies with multiphase operation to reduce conduction loss due to the dc resistance of the inductor by reducing the rms inductor current (IL). The delay-based ZCD determines the zero-current point of IL with a five-bit binary signal to compensate for the propagation delay between the control and the output signals of the driver. The system is fabricated using 180-nm CMOS technology. The power density is 1.838 A/mm2, and the peak efficiency is measured at 89.49% and 86.83% in the step-down and step-up mode, respectively, with a load current range of up to 2 A.

AB - In this letter, a four-phase hybrid step-up/step-down dc-dc converter with a delay-based zero-current detector (ZCD) is proposed. The proposed power stage operates in step-up or step-down mode depending on the target output voltage. It utilizes hybrid switched-inductor-capacitor and dual-path topologies with multiphase operation to reduce conduction loss due to the dc resistance of the inductor by reducing the rms inductor current (IL). The delay-based ZCD determines the zero-current point of IL with a five-bit binary signal to compensate for the propagation delay between the control and the output signals of the driver. The system is fabricated using 180-nm CMOS technology. The power density is 1.838 A/mm2, and the peak efficiency is measured at 89.49% and 86.83% in the step-down and step-up mode, respectively, with a load current range of up to 2 A.

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A Four-Phase Hybrid Step-Up/Down Converter with RMS Inductor Current Reduction and Delay-Based Zero-Current Detection

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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