PERFORMANCE ANALYSIS OF WIDE BANDGAP GAN BASED INTERLEAVED CONVERTER FOR CPU VOLTAGE REGULATOR APPLICATIONS
DOI:
https://doi.org/10.55766/sujst-2024-05-e05078Keywords:
Central processing unit, dc-dc converter, modeling; control, GaN devices, efficiency optimizationAbstract
Nowadays, the central processing unit (CPU) of laptop computer operates at very high clock frequencies (GHz) with abrupt load transitions. Therefore, it necessitates an efficient voltage regulator in order to realize the rapid CPU dynamics. In view of this, this paper presents a 4-phase interleaved synchronous buck converter (ISBC) for the CPU applications. It has the exceptional features such as input and output current ripple cancellation, good thermal performance, higher power, current and efficiency. The design of a 9~19 V input, 1 V/45 A, 300 kHz ISBC is accomplished as a CPU voltage regulator. The performance of the converter is interpreted for the line and load regulations based on the voltage mode hysteretic controller. The elaborative PSIM simulation results are presented in view of emphasizing the strength of this controller. Moreover, the efficiency analysis of the Si devices as well as GaN devices based interleaved converter is explored in detail. The GaN devices can ameliorate the power density (PD) as well as efficiency of the ISBC. It also highlights the importance of the switching frequency selection and optimization for the ISBC.
References
Abu-Qahouq, J.A., Pongratananukul, N., Batarseh, I., and Kasparis, T. (2002). Multiphase voltage-mode hysteretic controlled VRM with DSP control and novel current sharing. Proceedings of the Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), Dallas, TX, USA, 2:663-669. https://doi.org/10.1109/APEC.2002.989347
Fei, C., Ahmed, M.H., Lee, F.C., and Li, Q. (2017). Two-stage 48 V-12 V/6 V-1.8 V voltage regulator module with dynamic bus voltage control for light-load efficiency improvement. IEEE Transactions on Power Electronics, 32(7):5,628-5,636. https://doi.org/10.1109/TPEL.2016.2605579
Guo, J. (2003). High performance forward converter in non-isolated configurations. The 25th International Telecommunications Energy Conference (INTELEC '03), 98-103.
Jahanbakhshi, M. and Etezadinejad, M. (2019). Modeling and current balancing of interleaved buck converter using single current sensor. 2019 27th Iranian Conference on Electrical Engineering (ICEE2019), 662-667.
Jia, W. and Lee, F.C. (2005). Two novel soft-switched, high frequency, high efficiency, non-isolated VRs: The phase shift buck converter and the matrix-transformer phase-buck converter. IEEE Transactions on Power Electronics, 20(2):292-299. https://doi.org/10.1109/TPEL.2004.843014
Kaiwei, Y., Mao, Y., Ming, X., and Lee, F.C. (2005). Tapped-inductor buck converter for high-step down DC-DC conversion. IEEE Transactions on Power Electronics, 20(4):775-780. https://doi.org/10.1109/TPEL.2005.850920
Kutkut, N.H., Divan, D.M., and Randal, W.G. (1995). An improved full-bridge zero-voltage switching PWM converter using a two-inductor rectifier. IEEE Transactions on Industrial Electronics, 31(1):119-126. https://doi.org/10.1109/28.363041
Prajapati, P. and Balamurugan, S. (2023). Leveraging GaN for DC-DC power modules for efficient EVs: A review. IEEE Access, 11:95,874-95,888. https://doi.org/10.1109/ACCESS.2023.3311266
Rakesh Babu, P., Debaprasad, K., and Amit, P. (2008). Inductor coupling scheme to enhance the dynamic performance of a half-bridge DC-DC converter. TENCON 2008 - 2008 IEEE Region 10 Conference, 1-6.
Rakesh Babu, P., Debaprasad, K., and Amit, P. (2010). Design and performance studies of a hybrid voltage regulator with improved energy efficiency. IET Power Electronics, 3(6):915-924. https://doi.org/10.1049/iet-pel.2010.0001
Rakesh Babu, P., Debaprasad, K., and Amit, P. (2012). High performance voltage regulator for high step-down DC-DC converters. IET Power Electronics, 20(2):292-299.
Ravindranath Tagore, Y. and Anuradha, K. (2016). Comparative study of switched-mode power supplies for low voltage and high current applications. Journal of Electrical Engineering, 16(1):316-329.
Ravindranath Tagore, Y., Rajani, K., and Chandra Sekhar, K. (2023). Analysis, design, and simulation of high gain DC-DC converters for fuel cell applications. International Journal of Power Electronics, 18(3):314-345. https://doi.org/10.1504/IJPELEC.2023.133064
Wang, Y. and Tzou, Y. (2007). Design and realization of a digital multiphase-interleaved VRM controller using FPGA. IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society, Taipei, 1,978-1,982. https://doi.org/10.1109/IECON.2007.4460086
Xu, P., Jia, W., and Lee, F.C. (2001a). The active-clamp couple-buck converter: A novel high efficiency voltage regulator module. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition, 252-257. https://doi.org/10.1109/APEC.2001.911656
Xu, P., Jia, W., and Lee, F.C. (2001b). A high efficiency topology for 12 V VRM: Push-pull buck and its integrated magnetics implementation. Proceedings of IEEE APEC'02.
Yadlapalli, R.T. and Kotapati, A. (2020). Modelling, design, and implementation of quadratic buck converter for low power applications. International Journal of Power Electronics, 11(3):322-338. https://doi.org/10.1504/IJPELEC.2020.10027749
Yadlapalli, R.T. and Kotapati, A. (2014). A fast-response sliding-mode controller for quadratic buck converter. International Journal of Power Electronics, 6(2):103-130. https://doi.org/10.1504/IJPELEC.2014.061468
Yadlapalli, R.T., Kotapati, A., Kandipati, R., Balusu, S.R., and Koritala, C.S. (2021). Advancements in energy-efficient GaN power devices and power modules for electric vehicle applications: A review. International Journal of Energy Research, 45:12,638-12,664. https://doi.org/10.1002/er.6683
Yan, L., Junwei, H., Zhiguo, T., Tingxu, H., Wen-Liang, Z., Mo, H.M., Xiangyu, M., and Guigang, C. (2024). An overview of hybrid DC-DC converters: From seeds to leaves. IEEE Open Journal of the Solid-State Circuits Society, 4:12-24. https://doi.org/10.1109/OJSSCS.2023.3334228
Yang, T., Lei, Y., Bin, W., Yuanqi, Z., Xinze, C., and Baoxiang, F. (2024). Review of topologies, application areas, modeling, and control methods for switched capacitor circuits. IEEE Transactions on Power Electronics, 39(4):4,091-4,116. https://doi.org/10.1109/TPEL.2024.3350158
Zhihua, Y., Sheng, Y., and Yanfei, L. (2005). A novel non-isolated half-bridge DC-DC converter. IEEE Conference Publication, 1:301-307. https://doi.org/10.1109/APEC.2005.1452939
