Research on a primary-side regulation quasi-resonant flyback converter

Yani Li; Zikuan Huangfu; Fang Wang; Zhuo Lv

doi:10.1117/12.3034385

16 October 2024 Research on a primary-side regulation quasi-resonant flyback converter

Yani Li, Zikuan Huangfu, Fang Wang, Zhuo Lv

Author Affiliations +

Proceedings Volume 13291, Ninth International Symposium on Advances in Electrical, Electronics, and Computer Engineering (ISAEECE 2024); 132910F (2024) https://doi.org/10.1117/12.3034385
Event: Ninth International Symposium on Advances in Electrical, Electronics, and Computer Engineering (ISAEECE 2024), 2024, Changchun, China

Abstract

To achieve low power consumption and miniaturization design goals, this paper focuses on the research of a primary-side regulation quasi-resonant flyback converter structure. The converter operates in boundary conduction mode under heavy load, reducing the complexity of system control and avoiding excessive peak currents; it switches to discontinuous conduction mode under light load to improve conversion efficiency. The converter uses a clamp circuit to sample the output voltage and convert it into a current signal. The sampling is completed by a sample and hold circuit at the knee point, simplifying the output voltage sampling and eliminating the need for auxiliary windings. Circuit design and layout implementation were completed based on a standard 0.18μm BCD process. Simulation results show that the converter achieves a peak conversion efficiency of 88.27% under input voltage of 3-32V and output voltage of 5V, and it also has a conversion efficiency of over 70% under light load. The chip area is 1.48mm × 2.5mm.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yani Li, Zikuan Huangfu, Fang Wang, and Zhuo Lv "Research on a primary-side regulation quasi-resonant flyback converter", Proc. SPIE 13291, Ninth International Symposium on Advances in Electrical, Electronics, and Computer Engineering (ISAEECE 2024), 132910F (16 October 2024); https://doi.org/10.1117/12.3034385

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