Abstract
The electricity consumption by is continuously increasing with the development of internet technologies. Improving the power supplies efficiency of datacenter is critical for energy saving. Synchronous buck converter is widely used in datacenter as well as other applications. A method of increasing the efficiency for synchronous buck converter is add an extra auxiliary circuit to make the switches in synchronous buck converter be soft switching (i.e. ZCS, ZVS). This paper presents a simple auxiliary circuit composed of one inductor, one active switch, and two Schottky diodes for synchronous buck converter to achieve the high-side and the low-side switches be ZVS turning on and ZCS turning off. Besides, the switches in the auxiliary circuit are also soft switched. The auxiliary circuit could recycle the energy stored in the output capacitor of the high-side and low-side switches. A 48 V/12 V 100 kHz synchronous buck converter with the proposed auxiliary circuit is simulated. The simulation results show that the switches in the synchronous buck converter is soft switched. The auxiliary circuit improve the synchronous buck converter’s efficiency in the whole load range, especially for the light load range, the efficiency improvement as high as 3%.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Report. 2019. 160.8 B KWh a year! The power consumption of domestic data centers exceeds the whole city of Shanghai. IT House.
Ye, Z., Y. Lei, and R.C.N. Pilawa-Podgurski. 2020. The Cascaded Resonant converter: A hybrid switched-capacitor topology with high power density and efficiency. IEEE Transactions on Power Electronics 35 (5): 4946–4958.
Kasper, M., R.M. Burkart, G. Deboy, and J.W. Kolar. 2016. ZVS of Power MOSFETs revisited. IEEE Transactions on Power Electronics 31 (12): 8063–8067.
De Freitas, L.C., and N.P. Filho. 1994. A novel family of DC-DC self-resonant PWM converters. In: IECON, 268–274
Elasser, A., and D.A. Torrey. 1996. Soft switching active snubbers for DC/DC converters. IEEE Transactions on Power Electronics 11 (5): 710–722.
Gendi, L., and Z. Yueqing. 2011. A study of novel ZVZCS PWM Buck converter. In: 2011 International Conference on Consumer Electronics, Communications and Networks, 62–65.
Vilela, M.S., E.A.A. Coelho, J.B. Vieira, L.C. Freitas, and V.J. Farias. 1996. PWM soft-switched converters using a single active switch. IEEE Applied Power Electronics Conference Exposition 1: 305–310.
Divakar, B.P., and A. Ioinovici. 1996. Zero-voltage-transition converter with low conduction losses operating at constant switching frequency. IEEE Annual Power Electronic Special Conference 2: 1885–1890.
Panda, A.K., and K. Aroul. A novel technique to reduce the switching losses in a synchronous buck converter. In 2006 International Conference on Power Electronic, Drives and Energy System (PEDES ’06), 1–5 (2006).
Yang, H.T., J.T. Liao, and X.Y. Cheng. 2013. Zero-voltage-transition auxiliary circuit with dual resonant tank for DC-DC converters with synchronous rectification. IET Power Electronic 6 (6): 1157–1164.
Jiang, L., C.C. Mi, S. Li, C. Yin, and J. Li. 2013. An improved soft-switching buck converter with coupled inductor. IEEE Transactions on Power Electronics 28 (11): 4885–4891.
Zheng, T.Q., T. Shao, N. Han, Y. Li, and J. Liu. 2014. Current adaptive resonant loop soft switching PWM converters. In: IEEE Applied Power Electronic Conference and Exposition, 2061–2066.
Zhang, Q., Y.P. Zhang, X.D. Sun, D. Liu, and F.J. Deng. The Topologies research of a soft switching bidirectional DC/DC converter. In: Annual Conference of the IEEE Industrial Electronics Society, 4–8.
Wu, H., J. Zhang, J. Zhao, Y. Zhang, and L. Hu. 2019. A new soft-switching synchronous buck converter without auxiliary switch. In: 2019 IEEE 10th International Symposium on Power Electronics for Distributed Generation System, 537–541.
Panda, A.K., S.K. Sarode, and T. Ramesh. 2016. Zero voltage transition-zero current transition pulse-width modulated multiphase synchronous buck converter with an active auxiliary circuit for portable applications. IET Power Electronics 9 (4): 631–638.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 Beijing Oriental Sun Cult. Comm. CO Ltd
About this paper
Cite this paper
Zhong, J., Luo, B., Xiong, S., Zhu, G. (2021). An Auxiliary Circuit for Synchronous Buck Converter to Achieve All Switches ZVS/ZCS Switching in Wide Load Range. In: Ma, W., Rong, M., Yang, F., Liu, W., Wang, S., Li, G. (eds) The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering. Lecture Notes in Electrical Engineering, vol 742. Springer, Singapore. https://doi.org/10.1007/978-981-33-6606-0_64
Download citation
DOI: https://doi.org/10.1007/978-981-33-6606-0_64
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-33-6605-3
Online ISBN: 978-981-33-6606-0
eBook Packages: EnergyEnergy (R0)