Journal of Power Electronics

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

DOI QR Code

A High-Efficiency, Auto Mode-Hop, Variable-Voltage, Ripple Control Buck Converter

  • Rokhsat-Yazdi, Ehsan (Nanoelectronics Center of Excellence, School of Electrical and Computer Eng., University of Tehran) ;
  • Afzali-Kusha, Ali (Nanoelectronics Center of Excellence, School of Electrical and Computer Eng., University of Tehran) ;
  • Pedram, Massoud (Department of Electrical Engineering, University of Southern California)
  • Received : 2009.08.01
  • Published : 2010.03.25
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a simple yet efficient auto mode-hop ripple control structure for buck converters with light load operation enhancement is proposed. The converter, which operates under a wide range of input and output voltages, makes use of a state-dependent hysteretic comparator. Depending on the output current, the converter automatically changes the operating mode. This improves the efficiency and reduces the output voltage ripple for a wide range of output currents for given input and output voltages. The sensitivity of the output voltage to the circuit elements is less than 14%, which is seven times lower than that for conventional converters. To assess the efficiency of the proposed converter, it is designed and implemented with commercially available components. The converter provides an output voltage in the range of 0.9V to 31V for load currents of up to 3A when the input voltage is in the range of 5V to 32V. Analytical design expressions which model the operation of the converter are also presented. This circuit can be implemented easily in a single chip with an external inductor and capacitor for both fixed and variable output voltage applications.

Keywords

References

  1. W. Wang and G. Choi, "Minimum-energy LDPC decoder for real-time mobile application," EDAA Int. Conf. Design Automation and Test, pp. 343-348, 2007.
  2. S. Zhou and G. A. Rinc?n-Mora, "A high efficiency, soft switching DCDC converter with adaptive surrent-ripple sontrol for portable applications," IEEE Trans. Circuits and Systems, Vol. 53, No. 4, pp. 319-323, Apr. 2006. https://doi.org/10.1109/TCSII.2005.859572
  3. Barrado, A. $L\acute{a}zaro$, J. Pleite, R. $V\acute{a}zquez$, J. $V\acute{a}zquez$, and E. $Ol\acute{i}as$, "Linear-non-linear control (LnLc) for DC-DC buck converters: stability and transient response analysis," IEEE Int. Conf. Power Electronics, Vol. 2, pp. 1329-1335, Sep. 2004.
  4. S.K. Baranwal, A. Patra, and B. Culpepper, "Self oscillating control of a synchronous DC-DC buck converter," IEEE Int. Conf. Power Electronics Specialists, Vol. 5, pp. 3671-3674, Jun. 2004.
  5. P. Gupta and A. Patra, "Super-stable energy based switching control scheme for DC-DC buck converter circuits," IEEE, Vol. 4, pp. 3063- 3066, May 2005.
  6. I. Kondratiev, E. Santi, R. Dougal, and G. Veselov, "Synergetic control for DC-DC buck converters with constant power load," IEEE Int. Conf. Power Electronics, Vol. 5, pp. 3758-3764, Jun. 2004.
  7. S. K. Mazumder, A. H. Nayfeh, and D. Borojevic, "Robust control of parallel DC-DC buck converters by combining integral-variablestructure and multiple-sliding-surface control schemes," IEEE Trans. Power Electronic, Vol. 17, No. 3, pp. 428-437, May 2002. https://doi.org/10.1109/TPEL.2002.1004251
  8. G. loannidis, A. Kandianis, and S.N. Manias, "Novel control design for the buck converter," IEEE Proc-Electr Power Appl., Vol. 145, No. 1, pp. 39-47, Jan. 1998. https://doi.org/10.1049/ip-epa:19981486
  9. T. Suntio, "Analysis and modeling of peak-current-mode-controlled buck converter in DICM," IEEE Trans. Industrial Electronics, Vol. 48, No. 1, pp.127-135, Feb. 2001. https://doi.org/10.1109/41.904572
  10. D. W. Kang, Y. B. Kim, and J. T. Doyle, "A high-efficiency fully digital synchronous buck converter power delivery system based on a finitestate machine," IEEE Trans. Very Large Scale Integration (VLSI), Vol. 14, No. 3, pp. 229-240, Mar. 2006. https://doi.org/10.1109/TVLSI.2006.871764
  11. Y. Zhang, R. Zane, and D. Maksimovic, "Current sharing in digitally controlled masterless multi-phase DC-DC converters," IEEE Int. Conf. Power Electronics, pp. 2722-2728, Jun. 2005.
  12. R. Oliva, S. S. Ang, and G. E. Bortolotto, "Digital control of a voltagemode synchronous buck Converter," IEEE Trans. Power Electronics, Vol. 21, No. 1, pp. 157-163, Jan. 2006. https://doi.org/10.1109/TPEL.2005.861193
  13. N. Das and M. K. Kazimierczuk, "Power losses and efficiency of buck PWM DC-DC power convertor," IEEE Int. Conf. Electrical Insulation, pp. 417-423, Oct. 2005.
  14. M. Ludwig, M. Duffy, T. O'Donnell, P. McCloskey, and S. C. $\acute{O}$ , "PCB integrated inductors for low power DC/DC converter," IEEE Trans. Power Electronics, Vol. 18, No. 4, pp. 937-945, Jul. 2003. https://doi.org/10.1109/TPEL.2003.813757
  15. Z. Yang, S. Ye, and Y. F. Liu, "A new resonant gate drive circuit for synchronous buck converter," IEEE the Premier Global Event In power Electronic, pp. 52-58, Mar. 2006.
  16. K. Yao and F. C. Lee, "A novel resonant gate driver for high frequency synchronous buck converters," IEEE Trans. Power Electronics, Vol. 17, No. 2, pp. 180-186, Mar. 2002. https://doi.org/10.1109/63.988828
  17. M. Gildersleeve, H. P. Forghani-Zadeh, and G. A. Rinc?n-Mora, "A comprehensive power analysis and a highly efficient, mode-hopping dcdc converter," in Proc. IEEE Asia-Pacific Conf. ASIC, pp. 153-156, Nov. 2002.
  18. K. H. Liu and F. C. Y. Lee, "Zero-voltage switching technique in DC/DC converters," IEEE Trans. Power Electronics, Vol. 5, No. 3, pp. 293-304, Jul. 1990. https://doi.org/10.1109/63.56520
  19. A. Dancy and A. Chandrakasan, "Techniques for aggressive supply voltage scaling and efficient regulation," IEEE Int. Conf. Custom Integrated Circuits, pp. 579-586, 1997.
  20. V. Vorperian, "Quasi-square-wave converters: topologies and analysis," IEEE Trans. Power Electronics, Vol. 3, No. 2, pp. 183-191, Apr. 1988. https://doi.org/10.1109/63.4348
  21. C. M. Wang, "Novel zero-voltage-transition PWM DC-DC converters," IEEE Trans. Industrial Electronics, Vol. 53, No. 1, pp. 254-262, Feb. 2006. https://doi.org/10.1109/TIE.2005.862253
  22. M. Wilcox and R. Flatness, "Control circuit and method for maintaining high efficiency over broad current ranges in a switching regulator circuit" U.S Patent 6,580,258, Jun. 17, 2003.
  23. A. Prodic and D. Maksimovic, "Digital PWM controller and current estimator for a low-power switching converter," Proc. 7th Annu.Workshop Computers in Power Electronics, pp. 123-128, 2000.
  24. B. Arbetter, R. Erickson, and D. Maksimovic, "DC-DC converter design for battery-operated systems," in Proc. 26th Annual IEEE Power Electronics Specialists Conf., Vol. 1, pp. 103-109, Jun. 1995.
  25. C. H. Tso and J. C. Wu, "A ripple control buck regulator with fixed output frequency," IEEE Power Electronics Letters, Vol. 1, No. 3, pp. 61-63, Sep. 2003. https://doi.org/10.1109/LPEL.2003.819643
  26. M. Castilla, L. G. Vicuna, J.M. Guerrero, J. Matas, and J. Miret, "Design of voltage-mode hysteretic controllers for synchronous buck converters supplying microprocessor loads," IEE Proc.-Electr. Power Appl., Vol. 152, No. 5, pp. 1171-1178, Sep. 2005. https://doi.org/10.1049/ip-epa:20045276
  27. K. D. T. Ngo, S. K. Mishra, and M. Walters, "Synthetic-ripple modulator for synchronous buck converter," IEEE Power Electronics Letters, Vol. 3, No. 4, pp. 148-151, Dec. 2005. https://doi.org/10.1109/LPEL.2005.863604
  28. K. Wong, "Output capacitor stability study on a voltage-mode buck regulator using system-poles approach," IEEE Trans. Circuits And Systems, Vol. 51, No. 8, pp. 436-441, Aug. 2004. https://doi.org/10.1109/TCSII.2004.832782

Cited by

  1. Single-Switch Buck Converter with a Ripple-Free Inductor Current vol.11, pp.4, 2011, https://doi.org/10.6113/JPE.2011.11.4.507
  2. Half Load-Cycle Worked Dual Input Single Output DC/AC Inverter vol.14, pp.6, 2014, https://doi.org/10.6113/JPE.2014.14.6.1217