[1] Yao Suyi, Jiang Jianguo,. Buck converter stability techniques for secondary filtersand adaptive voltage positioning [J]. Journal of Southeast University (English Edition), 2021, 37 (3): 258-263. [doi:10.3969/j.issn.1003-7985.2021.03.004]

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Buck converter stability techniques for secondary filtersand adaptive voltage positioning()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

37

Issue:

2021 3

Page:

258-263

Research Field:

Electrical Engineering

Publishing date:

2021-09-20

Info

Title:

Buck converter stability techniques for secondary filtersand adaptive voltage positioning

Author(s):

Yao Suyi;  Jiang Jianguo

School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

Keywords:

buck converter;  secondary filter;  adaptive voltage positioning(AVP);  output voltage noise;  small-signal model

PACS:

TM46

DOI:

10.3969/j.issn.1003-7985.2021.03.004

Abstract:

To reduce output voltage noise and improve dynamic response performance, this study designed a buck converter on the basis of secondary filters and adaptive voltage positioning(AVP). A hybrid control method was proposed for the compensation of the secondary filter. The introduction of a high-frequency feedback path, in addition to the traditional feedback path, effectively improved the influence of the secondary filter on the loop stability and direct current regulation performance. A small-signal model of the buck converter based on the proposed control method was derived, and the stability and selection of control parameters were analyzed. AVP is realized using an easy-to-implement and low-cost control method that was proposed to improve dynamic response performance by changing the low-frequency gain of the control loop and load regulation of the output voltage. The experimental results of the buck converter showed that the proposed method effectively reduced the output voltage noise by 50% and improved the dynamic response capability to meet the target requirements of mainstream electronic systems.

References:

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[9] Hu K Y, Chen B M, Tsai C. A digitally controlled buck converter with current sensor-less adaptive voltage positioning(AVP)mechanism [C]// International Symposium on VLSI Design, Automation and Test. Hsinchu, China, 2017: 332-341. DOI:10.1109/VLSI-DAT.2017.7939664.
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Memo

Memo:

Biographies: Yao Suyi(1982—), male, Ph.D. candidate; Jiang Jianguo(corresponding author), male, doctor, professor, jjg6722@163.com.
Citation: Yao Suyi, Jiang Jianguo. Buck converter stability techniques for secondary filters and adaptive voltage positioning[J].Journal of Southeast University(English Edition), 2021, 37(3):258-263.DOI:10.3969/j.issn.1003-7985.2021.03.004.

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