Dual-path frequency compensation for current-mode buck converters

Pang Jung Liu; Shang Ru Hsu; Tzu Hsuan Chen

doi:10.1109/PEDS.2015.7203519

Dual-path frequency compensation for current-mode buck converters

Pang Jung Liu
, Shang Ru Hsu
, Tzu Hsuan Chen

Department of Electrical Engineering

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

1 Scopus citations

Abstract

This paper proposes a dual-path frequency compensation (DPFC) for implementing on-chip error amplifier (EA). The DPFC uses two operation amplifiers to simultaneously charge and discharge a compensation capacitor. As a result, the equivalent capacitance is significantly multiplied with small additional power and silicon area. Since the slew rate of the EA is increased owing to the small compensation capacitance, the transient response of the buck converter is also enhanced dramatically. A laboratory converter with the DPFC is implemented with 0.35-μm CMOS process. Simulation results demonstrate the converter stability and transient response. The transient recovery time is less than 4 μs for load current changing from 500 mA to 50 mA. With the DPFC, the compensation capacitor is shrunk significantly and no compensation resistor is needed.

Original language	English
Title of host publication	2015 IEEE 11th International Conference on Power Electronics and Drive Systems, PEDS 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	432-436
Number of pages	5
ISBN (Electronic)	9781479944033
DOIs	https://doi.org/10.1109/PEDS.2015.7203519
State	Published - 14 Aug 2015
Event	11th IEEE International Conference on Power Electronics and Drive Systems, PEDS 2015 - Sydney, Australia Duration: 9 Jun 2015 → 12 Jun 2015

Publication series

Name	Proceedings of the International Conference on Power Electronics and Drive Systems
Volume	2015-August

Conference

Conference	11th IEEE International Conference on Power Electronics and Drive Systems, PEDS 2015
Country/Territory	Australia
City	Sydney
Period	9/06/15 → 12/06/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

Frequency compensation
dc-dc converter
slew rat
transient response

Access to Document

10.1109/PEDS.2015.7203519

Cite this

Liu, P. J., Hsu, S. R., & Chen, T. H. (2015). Dual-path frequency compensation for current-mode buck converters. In 2015 IEEE 11th International Conference on Power Electronics and Drive Systems, PEDS 2015 (pp. 432-436). Article 7203519 (Proceedings of the International Conference on Power Electronics and Drive Systems; Vol. 2015-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PEDS.2015.7203519

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abstract = "This paper proposes a dual-path frequency compensation (DPFC) for implementing on-chip error amplifier (EA). The DPFC uses two operation amplifiers to simultaneously charge and discharge a compensation capacitor. As a result, the equivalent capacitance is significantly multiplied with small additional power and silicon area. Since the slew rate of the EA is increased owing to the small compensation capacitance, the transient response of the buck converter is also enhanced dramatically. A laboratory converter with the DPFC is implemented with 0.35-μm CMOS process. Simulation results demonstrate the converter stability and transient response. The transient recovery time is less than 4 μs for load current changing from 500 mA to 50 mA. With the DPFC, the compensation capacitor is shrunk significantly and no compensation resistor is needed.",

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Liu, PJ, Hsu, SR & Chen, TH 2015, Dual-path frequency compensation for current-mode buck converters. in 2015 IEEE 11th International Conference on Power Electronics and Drive Systems, PEDS 2015., 7203519, Proceedings of the International Conference on Power Electronics and Drive Systems, vol. 2015-August, Institute of Electrical and Electronics Engineers Inc., pp. 432-436, 11th IEEE International Conference on Power Electronics and Drive Systems, PEDS 2015, Sydney, Australia, 9/06/15. https://doi.org/10.1109/PEDS.2015.7203519

Dual-path frequency compensation for current-mode buck converters. / Liu, Pang Jung; Hsu, Shang Ru; Chen, Tzu Hsuan.
2015 IEEE 11th International Conference on Power Electronics and Drive Systems, PEDS 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 432-436 7203519 (Proceedings of the International Conference on Power Electronics and Drive Systems; Vol. 2015-August).

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

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N2 - This paper proposes a dual-path frequency compensation (DPFC) for implementing on-chip error amplifier (EA). The DPFC uses two operation amplifiers to simultaneously charge and discharge a compensation capacitor. As a result, the equivalent capacitance is significantly multiplied with small additional power and silicon area. Since the slew rate of the EA is increased owing to the small compensation capacitance, the transient response of the buck converter is also enhanced dramatically. A laboratory converter with the DPFC is implemented with 0.35-μm CMOS process. Simulation results demonstrate the converter stability and transient response. The transient recovery time is less than 4 μs for load current changing from 500 mA to 50 mA. With the DPFC, the compensation capacitor is shrunk significantly and no compensation resistor is needed.

AB - This paper proposes a dual-path frequency compensation (DPFC) for implementing on-chip error amplifier (EA). The DPFC uses two operation amplifiers to simultaneously charge and discharge a compensation capacitor. As a result, the equivalent capacitance is significantly multiplied with small additional power and silicon area. Since the slew rate of the EA is increased owing to the small compensation capacitance, the transient response of the buck converter is also enhanced dramatically. A laboratory converter with the DPFC is implemented with 0.35-μm CMOS process. Simulation results demonstrate the converter stability and transient response. The transient recovery time is less than 4 μs for load current changing from 500 mA to 50 mA. With the DPFC, the compensation capacitor is shrunk significantly and no compensation resistor is needed.

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Liu PJ, Hsu SR, Chen TH. Dual-path frequency compensation for current-mode buck converters. In 2015 IEEE 11th International Conference on Power Electronics and Drive Systems, PEDS 2015. Institute of Electrical and Electronics Engineers Inc. 2015. p. 432-436. 7203519. (Proceedings of the International Conference on Power Electronics and Drive Systems). doi: 10.1109/PEDS.2015.7203519

Dual-path frequency compensation for current-mode buck converters

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Keywords

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