Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis and Optimization of Bidirectional Exponential SC Power Conversion Circuits

  • Ye, Yuanmao (School of Automation, Guangdong University of Technology) ;
  • Peng, Wei (School of Automation, Guangdong University of Technology) ;
  • Jiang, Bijia (School of Automation, Guangdong University of Technology) ;
  • Zhang, Xianyong (College of Automation, Guangdong Polytechnic Normal University)
  • Received : 2017.09.13
  • Accepted : 2018.01.09
  • Published : 2018.05.20
Download PDF
⟨ Previous Next ⟩

Abstract

A bidirectional exponential-gain switched-capacitor (SC) DC-DC converter is developed in this paper. When compared with existing exponential SC converters, the number of switches is significantly reduced and its structure is simplified. The voltage transfer features, voltage ripple across capacitors, efficiency and output impedance of the proposed converter are analyzed in detail. Optimization of the output impedance is also discussed and the best type of capacitance distribution is determined. A common function of the voltage gain to the output impedance is found among the proposed converter and other popular SC voltage multipliers. Experimental evaluation is carried out with a 6-24V bidirectional prototype converter.

Keywords

References

  1. G. Villar-Pique, H. J. Bergveld, and E. Alarcon, "Survey and benchmark of fully integrated switching power converters: Switched-capacitor versus inductive approach," IEEE Trans. Power Electron., Vol. 28, No. 9, pp. 4156-4167, Sep. 2013. https://doi.org/10.1109/TPEL.2013.2242094
  2. S. V. Cheong, H. Chung, and A. Ioinovici, "Inductorless DC-to-DC converter with high power density," IEEE Trans. Ind. Electron., Vol. 41, No. 2, pp. 208-215, Apr. 1994. https://doi.org/10.1109/41.293881
  3. F. Ueno, T. Inoue, I. Oota, and I. Harada, "Novel type DC-AC converter using a switched-capacitor transformer," Proc. European Conference on Circuit Theory and Design, pp. 1181-1184, Sep. 1993.
  4. H. S.-H. Chung, "Design and analysis of a switched-capacitor-based step up DC/DC converter with continuous input current," IEEE Trans. Circuits Syst. I, Fundam. Theory, Vol. 46, No. 6, pp. 722-730, Jun. 1999. https://doi.org/10.1109/81.768828
  5. S. Xiong, Y. Huang, S.-C. Tan, and S. Y. R. Hui, "Morphing switched-capacitor converters with variable conversion ratio," IEEE Trans. Power Electron., Vol.31, No. 8, pp. 5680-5693, Aug. 2016. https://doi.org/10.1109/TPEL.2015.2498305
  6. Y. Lei, R. May, and R. Pilawa-Podgurski, "Split-phase control: Achieving complete soft-charging operation of a Dickson switched-capacitor converter," IEEE Trans. Power Electron., Vol. 31, No. 1, pp. 770-782, Jan. 2016. https://doi.org/10.1109/TPEL.2015.2403715
  7. Y. C. Fong, K.W.E. Cheng, Y. Ye, and Y. C. Chan, "Centralized regulation scheme for a parallel-mode switched-capacitor converter system with simple unit commitment," IEEE Trans. Ind. Electron., Vol. 64, No. 8, pp. 6149-6158, Aug. 2017. https://doi.org/10.1109/TIE.2017.2682038
  8. Y. Ye and K.W.E. Cheng, "Voltage-gap modeling method for single-stage switched-capacitor converters," IEEE J. Emerg. Sel. Topics Power Electron., Vol. 2, No. 4, pp. 808-813, Dec. 2014. https://doi.org/10.1109/JESTPE.2014.2358229
  9. Y. Ye and K. W. E. Cheng, "Analysis and optimization of switched capacitor power conversion circuits with parasitic resistances and inductances," IEEE Trans. Power Electron., Vol. 32, No. 3, pp. 2018-2028, Mar. 2017. https://doi.org/10.1109/TPEL.2016.2569439
  10. B. Wu, L. Wang, L. Yang, K. M. Smedley, and S. Singer, "Comparative analysis of steady-state models for a switched-capacitor converter," IEEE Trans. Power Electron., Vol. 32, No. 2, pp. 1186-1197, Feb. 2017. https://doi.org/10.1109/TPEL.2016.2548489
  11. S. Iqbal, "A hybrid symmetrical voltage multiplier," IEEE Trans. Power Electron., Vol. 29, No. 1, pp. 6-12, Jan. 2014. https://doi.org/10.1109/TPEL.2013.2251474
  12. C.-M. Young, M.-H. Chen, T.-A. Chang, C.-C. Ko, and K.-K. Jen, "Cascade cockcroft-walton voltage multiplier applied to transformerless high step-up DC-DC converter," IEEE Trans. Ind. Electron., Vol. 60, No. 2, pp. 523-537, Feb. 2013. https://doi.org/10.1109/TIE.2012.2188255
  13. J. F. Dickson, "On-chip high-voltage generation in MNOS integrated circuits using an improved voltage multiplier technique," IEEE J. Solid-State Circuits, pp. 374-378, 1976.
  14. M. Prudente, L. L. Pfitscher, G. Emmendoerfer, E. F. Romaneli, and R. Gules, "Voltage multiplier cells applied to non-isolated DC-DC converters," IEEE Trans. Power Electron., Vol. 23, No. 2, pp.871-887, Feb. 2008. https://doi.org/10.1109/TPEL.2007.915762
  15. O.-Y. Wong, H. Wong, W.-S. Tam, and C.-W. Kok, "An overview of charge pumping circuits for flash memory applications," IEEE 9th International Conference on ASIC (ASICON), pp. 116-119, 2011.
  16. T. Tanzawa and S. Atsumi, "Optimization of word-line booster circuits for low-voltage flash memories," IEEE J. Solid-State Circuits, Vol. 34, No. 8, pp. 1091-1098, Aug. 1999. https://doi.org/10.1109/4.777107
  17. J. Shin, I.-Y. Chung, Y. J. Park, and M. H. Shick, "A new charge pump without degradation in threshold voltage due to body effect," IEEE J. Solid-State Circuits, Vol. 35, No. 8, pp. 1227-1230, Aug. 2000. https://doi.org/10.1109/4.859515
  18. J. S. Brugler, "Theoretical performance of voltage multiplier circuits," IEEE J. Solid-State Circuits, Vol. SSC-6, No. 3, pp. 132-135, Jun. 1971.
  19. F. Ueno, T. Inoue, I. Oota, and I. Harada, "Emergency power supply for small computer systems," in Proc. IEEE Int. Conf. Circuits Syst., pp.1065-1068, 1991.
  20. L. K. Chang and C. H. Hu, "High efficiency MOS charge pumps based on exponential-gain structure with pumping gain increase circuits," IEEE Trans. Power Electron., Vol. 21, No. 3, pp. 826-831, May 2006. https://doi.org/10.1109/TPEL.2006.874795
  21. C. Y. Tsui, H. Shao, W. H. Ki, and F. Su, "Ultra-low voltage power management and computation methodology for energy harvesting applications," Proc. IEEE Symp. VLSI Circuit, pp. 316-319, 2005.
  22. L. Gobbi, A. Cabrini, and G. Torelli, "A discussion on exponential-gain charge pump," 18th European Conference on Circuit Theory and Design, pp. 615-618, 2007.