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Hybrid Compensation Scheme Based on Buck Converter with Variable Output Capacitance
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Shusen ZHANG1, Hanxin SHEN1, Qingliang ZHENG2
Journal of Power Supply | 2025, 23(8) : 22 - 32
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Journal of Power Supply | 2025, 23(8): 22-32
• DC-DC Converters •
Hybrid Compensation Scheme Based on Buck Converter with Variable Output Capacitance
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Shusen ZHANG1, Hanxin SHEN1, Qingliang ZHENG2
Affiliations
  • 1.School of Optoelectronic and Communication Engineering, Xiamen University of Technology, Xiamen 361000, China
  • 2.Inmicro Technology Co., Ltd., Xiamen 361000, China
Published: 2025-12-30 doi: 10.13234/j.issn.2095-2805.2025.8.22
Outline
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A hybrid compensation scheme based on variable output capacitance is proposed to improve the start-up speed and anti-load impact capability of a non-ideal peak current mode (PCM) Buck converter, under which the loop stability and dynamic response performance are ensured while realizing the synchronous switching of output capacitance and loop compensation parameters. A complete small-signal model of the non-ideal PCM Buck converter is established, the open-loop transfer function of the system is analyzed to obtain the influence of different output capacitance parameters on the compensation network, and the design of reasonable loop compensation is carried out. Simulation results show that the compensated system can maintain the crossing frequency around 10 kHz (1/20 fsw) and the phase margin around 70° under a variety of conditions. Moreover, a synchronous switching circuit of output capacitance and compensation parameters is designed. Finally, a 15 W experimental prototype was built, and experimental results further verified the feasibility of the proposed scheme.

Peak current mode (PCM) control  /  Buck converter  /  loop compensation  /  stability
张述森, 沈汉鑫, 郑清良. 基于可变输出电容Buck变换器的混合补偿方案. 电源学报, 2025 , 23 (8) : 22 -32 . DOI: 10.13234/j.issn.2095-2805.2025.8.22
Shusen ZHANG, Hanxin SHEN, Qingliang ZHENG. Hybrid Compensation Scheme Based on Buck Converter with Variable Output Capacitance[J]. Journal of Power Supply, 2025 , 23 (8) : 22 -32 . DOI: 10.13234/j.issn.2095-2805.2025.8.22
Funding
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  • Industry-university-research Project of Fujian Provincial Department of Science and Technology(2019H6024)
Appendix
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Year 2025 volume 23 Issue 8
25
2
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.8.22
  • Receive Date：2023-09-21
  • Online Date：2026-10-26
  • Published：2025-12-30
Article Data
Affiliations
History
  • Received：2023-09-21
  • Revised：2023-11-19
  • Accepted：2023-12-07
Funding
Industry-university-research Project of Fujian Provincial Department of Science and Technology(2019H6024)
Affiliations
    1.School of Optoelectronic and Communication Engineering, Xiamen University of Technology, Xiamen 361000, China
    2.Inmicro Technology Co., Ltd., Xiamen 361000, China
References
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2025.8.22
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