A Hybrid Converter with Dual Outputs for Low Cross Regulation and Improved Current Balance

Sheng Cheng Lee; Min Chu Chien; Wei Chieh Hung; Cheng Wen Chen; Yu Wei Huang; An Chen; Zhen Yu Yang; Ke Horng Chen; Kuo Lin Zheng; Ying Hsi Lin; Shian Ru Lin; Tsung Yen Tsai

doi:10.1109/TPEL.2024.3394804

A Hybrid Converter with Dual Outputs for Low Cross Regulation and Improved Current Balance

Sheng Cheng Lee, Min Chu Chien, Wei Chieh Hung, Cheng Wen Chen, Yu Wei Huang, An Chen, Zhen Yu Yang, Ke Horng Chen^*, Kuo Lin Zheng, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

^*Corresponding author for this work

Department of Electrical and Computer Engineering

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

1 Scopus citations

Abstract

The discontinuous energy transfer characteristics of traditional single-inductor dual-output converters can lead to large output voltage ripple and cross-regulation. Thus, this article presents a double step-down dual-output converter implemented in a 0.15 μm bipolar-CMOS-DMOS (BCD) process, adopting hybrid sum and deviation control to achieve a small output voltage ripple of 25 mV and minimize cross-regulation to 0.025 mV/mA. The timing balance mechanism generates the replicated on-time and calibrates by sensing inductor current mismatch, which improves current balance by 90%. The proposed pulse-based highly robust high-speed low stress level shifter enhances transition speed during load transients while reducing the voltage stress on low voltage device.

Original language	English
Pages (from-to)	9591-9601
Number of pages	11
Journal	IEEE Transactions on Power Electronics
Volume	39
Issue number	8
DOIs	https://doi.org/10.1109/TPEL.2024.3394804
State	Published - 1 Aug 2024

Keywords

Cross regulation suppression
Internet of Things
double step-down converter (DSD)
inductor current balancing
power delivery (PD) 3.1 standard
pulse-based level shifter
single inductor dual output converter (SIDO)

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10.1109/TPEL.2024.3394804

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title = "A Hybrid Converter with Dual Outputs for Low Cross Regulation and Improved Current Balance",

abstract = "The discontinuous energy transfer characteristics of traditional single-inductor dual-output converters can lead to large output voltage ripple and cross-regulation. Thus, this article presents a double step-down dual-output converter implemented in a 0.15 μm bipolar-CMOS-DMOS (BCD) process, adopting hybrid sum and deviation control to achieve a small output voltage ripple of 25 mV and minimize cross-regulation to 0.025 mV/mA. The timing balance mechanism generates the replicated on-time and calibrates by sensing inductor current mismatch, which improves current balance by 90%. The proposed pulse-based highly robust high-speed low stress level shifter enhances transition speed during load transients while reducing the voltage stress on low voltage device.",

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author = "Lee, {Sheng Cheng} and Chien, {Min Chu} and Hung, {Wei Chieh} and Chen, {Cheng Wen} and Huang, {Yu Wei} and An Chen and Yang, {Zhen Yu} and Chen, {Ke Horng} and Zheng, {Kuo Lin} and Lin, {Ying Hsi} and Lin, {Shian Ru} and Tsai, {Tsung Yen}",

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doi = "10.1109/TPEL.2024.3394804",

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AU - Lee, Sheng Cheng

AU - Chien, Min Chu

AU - Hung, Wei Chieh

AU - Chen, Cheng Wen

AU - Huang, Yu Wei

AU - Chen, An

AU - Yang, Zhen Yu

AU - Chen, Ke Horng

AU - Zheng, Kuo Lin

AU - Lin, Ying Hsi

AU - Lin, Shian Ru

AU - Tsai, Tsung Yen

PY - 2024/8/1

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N2 - The discontinuous energy transfer characteristics of traditional single-inductor dual-output converters can lead to large output voltage ripple and cross-regulation. Thus, this article presents a double step-down dual-output converter implemented in a 0.15 μm bipolar-CMOS-DMOS (BCD) process, adopting hybrid sum and deviation control to achieve a small output voltage ripple of 25 mV and minimize cross-regulation to 0.025 mV/mA. The timing balance mechanism generates the replicated on-time and calibrates by sensing inductor current mismatch, which improves current balance by 90%. The proposed pulse-based highly robust high-speed low stress level shifter enhances transition speed during load transients while reducing the voltage stress on low voltage device.

AB - The discontinuous energy transfer characteristics of traditional single-inductor dual-output converters can lead to large output voltage ripple and cross-regulation. Thus, this article presents a double step-down dual-output converter implemented in a 0.15 μm bipolar-CMOS-DMOS (BCD) process, adopting hybrid sum and deviation control to achieve a small output voltage ripple of 25 mV and minimize cross-regulation to 0.025 mV/mA. The timing balance mechanism generates the replicated on-time and calibrates by sensing inductor current mismatch, which improves current balance by 90%. The proposed pulse-based highly robust high-speed low stress level shifter enhances transition speed during load transients while reducing the voltage stress on low voltage device.

KW - Cross regulation suppression

KW - Internet of Things

KW - double step-down converter (DSD)

KW - inductor current balancing

KW - power delivery (PD) 3.1 standard

KW - pulse-based level shifter

KW - single inductor dual output converter (SIDO)

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JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 8

ER -

A Hybrid Converter with Dual Outputs for Low Cross Regulation and Improved Current Balance

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