A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response

Pai Yi Wang; Li Te Wu; Tai Haur Kuo

doi:10.1109/ASSCC.2014.7008862

A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response

Pai Yi Wang, Li Te Wu, Tai Haur Kuo

Department of Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient speed. This paper proposes a current-mode buck converter with reconfigurable compensation coefficients controlled by a switched-capacitor compensator and activated by a transient detector. Fabricated in 0.35μm CMOS process, this chip occupying 0.91mm² achieves 96.3% peak efficiency. A 5μs settling time is measured with 75mV undershoot for 700mA load transition.

Original language	English
Title of host publication	2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	69-72
Number of pages	4
ISBN (Electronic)	9781479940905
DOIs	https://doi.org/10.1109/ASSCC.2014.7008862
Publication status	Published - 2015 Jan 13
Event	2014 10th IEEE Asian Solid-State Circuits Conference, A-SSCC 2014 - Kaohsiung, Taiwan Duration: 2014 Nov 10 → 2014 Nov 12

Publication series

Name	2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers

Conference

Conference	2014 10th IEEE Asian Solid-State Circuits Conference, A-SSCC 2014
Country/Territory	Taiwan
City	Kaohsiung
Period	14-11-10 → 14-11-12

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering
Hardware and Architecture

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10.1109/ASSCC.2014.7008862

Cite this

Wang, P. Y., Wu, L. T., & Kuo, T. H. (2015). A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response. In 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers (pp. 69-72). [7008862] (2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ASSCC.2014.7008862

Wang, Pai Yi ; Wu, Li Te ; Kuo, Tai Haur. / A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response. 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers. Institute of Electrical and Electronics Engineers Inc., 2015. pp. 69-72 (2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers).

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title = "A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response",

abstract = "Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient speed. This paper proposes a current-mode buck converter with reconfigurable compensation coefficients controlled by a switched-capacitor compensator and activated by a transient detector. Fabricated in 0.35μm CMOS process, this chip occupying 0.91mm2 achieves 96.3% peak efficiency. A 5μs settling time is measured with 75mV undershoot for 700mA load transition.",

author = "Wang, {Pai Yi} and Wu, {Li Te} and Kuo, {Tai Haur}",

year = "2015",

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series = "2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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booktitle = "2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers",

address = "United States",

note = "2014 10th IEEE Asian Solid-State Circuits Conference, A-SSCC 2014 ; Conference date: 10-11-2014 Through 12-11-2014",

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Wang, PY, Wu, LT & Kuo, TH 2015, A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response. in 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers., 7008862, 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers, Institute of Electrical and Electronics Engineers Inc., pp. 69-72, 2014 10th IEEE Asian Solid-State Circuits Conference, A-SSCC 2014, Kaohsiung, Taiwan, 14-11-10. https://doi.org/10.1109/ASSCC.2014.7008862

A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response. / Wang, Pai Yi; Wu, Li Te; Kuo, Tai Haur.
2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers. Institute of Electrical and Electronics Engineers Inc., 2015. p. 69-72 7008862 (2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient speed. This paper proposes a current-mode buck converter with reconfigurable compensation coefficients controlled by a switched-capacitor compensator and activated by a transient detector. Fabricated in 0.35μm CMOS process, this chip occupying 0.91mm2 achieves 96.3% peak efficiency. A 5μs settling time is measured with 75mV undershoot for 700mA load transition.

AB - Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient speed. This paper proposes a current-mode buck converter with reconfigurable compensation coefficients controlled by a switched-capacitor compensator and activated by a transient detector. Fabricated in 0.35μm CMOS process, this chip occupying 0.91mm2 achieves 96.3% peak efficiency. A 5μs settling time is measured with 75mV undershoot for 700mA load transition.

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Wang PY, Wu LT, Kuo TH. A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response. In 2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers. Institute of Electrical and Electronics Engineers Inc. 2015. p. 69-72. 7008862. (2014 IEEE Asian Solid-State Circuits Conference, A-SSCC - Proceedings of Technical Papers). doi: 10.1109/ASSCC.2014.7008862

A current-mode buck converter with bandwidth reconfigurable for enhanced efficiency and improved load transient response

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