Design and Implementation Challenges of Digital Controlled DC-DC Converters


Oladimeji Ibrahim,Nor Zaihar Yahaya,Nordin Saad,



Dc-Dc Power Converter,Digital Control ,Digital PWM,Distributed Generation, Voltage Regulation,


DC-DC converters are used at the front stage of multiple stage inverters for multiple energy sources integration and voltage regulation. The design has been dominated by conventional analogue techniques until recently that decline in the price to performance ratio of digital signal processor arose interest in digital control. Digital control offers high flexibility, programmability, less part number, monitoring and auto diagnosing capability. This paper presents a technical overview and design constrains of digitally controlled DC-DC power converter towards achieving fast and improved system dynamics. An insight is provided on the limitations of practical implementation of digital control DC-DC converters which includes the digital PWM resolution, the ADC sampling delay and limited control bandwidth of digital compensator.


I.Algreer, M., Armstrong, M., & Giaouris, D. (2011). Adaptive PD+ I control of a switch-mode DC–DC power converter using a recursive FIR predictor. IEEE transactions on industry applications, 47(5), 2135-2144.

II.Ang, S., & Oliva, A. (2005). Power-switching converters: CRC press.

III.Applebaum, J. (1987). The quality of load matching in a direct-coupling photovoltaic system. Energy Conversion, IEEE Transactions on(4), 534-541.

IV.Bradley, M., Alarcon, E., & Feely, O. (2012). Analysis of limit cycles in a PI digitally controlled buck converter.Paper presented at the Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

V.Buccella, C., Cecati, C., & Latafat, H. (2012). Digital control of power converters—A survey. Industrial Informatics, IEEE Transactions on, 8(3), 437-447.

VI.Carrasco, J. M., Franquelo, L. G., Bialasiewicz, J. T., Galván, E., Guisado, R. P., Prats, M. A., . . . Moreno-Alfonso, N. (2006). Power-electronic systems for the grid integration of renewable energy sources: A survey. Industrial Electronics, IEEE Transactions on, 53(4), 1002-1016.

VII.Chakraborty, S., Simões, M. G., & Kramer, W. E. (2013). Power Electronics for Renewable and Distributed Energy Systems: Springer.

VIII.Chang, Y.-T., & Lai, Y.-S. (2007). Effect of sampling frequency of A/D converter on controller stability and bandwidth of digital-controlled power converter.Paper presented at the Power Electronics, 2007. ICPE’07. 7th Internatonal Conference on.

IX.Chang, Y.-T., & Lai, Y.-S. (2010). Practical considerations for the design and implementation of digital-controlled power converters.Paper presented at the IECON 2010-36th Annual Conference on IEEE Industrial Electronics Society.

X.Cho, W., Powers, E. J., & Santoso, S. (2010). Lowand high frequency harmonic reduction in a PWM inverter using dithered sigma-delta modulation.Paper presented at the Information Sciences Signal Processing and their Applications (ISSPA), 2010 10th International Conference on.

XI.Corradini, L., & Maksimovic, D. (2010). A digital pulse-width modulator for phase-shift operation of full-bridge isolated DC-DC converters.Paper presented at the Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE.

XII.England, I. N., & Truewind, A. (2009). Technical Requirements for Wind Generation Interconnection and Integration. XIII.Guo, L., Hung, J. Y., & Nelms, R. (2012). Design of a fuzzy controller using variable structure approach for application to DC–DC converters. Electric Power Systems Research, 83(1), 104-109.

XIV.Hwu, K., & Yau, Y. (2009). Improvement of one-comparator counter-based pfm control for dc-dc converter.Paper presented at the Industrial Electronics, 2009. ISIE 2009. IEEE International Symposiumon.

XV.Ibrahim, O., Yahaya, N. Z., & Saad, N. (2015). Single phase inverter with wide-input voltage range for solar photovoltaic application.Paper presented at the Environment and Electrical Engineering (EEEIC), 2015 IEEE 15th International Conference on.

XVI.Ibrahim, O., Yahaya, N. Z., Saad, N., & Ahmed, K. Y. (2017). Development of Observer State Output Feedback for Phase-Shifted Full Bridge DC-DC Converter Control. IEEE Access.

XVII.Kularatna, N. (1998). Power electronics design handbook: low-powercomponents and applications: Newnes.XVIII)Liu, Y.-F., & Sen, P. (2005). Digital control of switching power converters.Paper presented at the Control Applications, 2005. CCA 2005. Proceedings of 2005 IEEE Conference on.

XIX.Lukic, Z., Rahman, N., & Prodic, A. (2007). Multibit Σ–∆ PWM digital controller IC for DC–DC converters operating at switching frequencies beyond 10 MHz. Power Electronics, IEEE Transactions on, 22(5), 1693-1707.

XX.O’Malley, E., & Rinne, K. (2004). A programmable digital pulse width modulator providing versatile pulse patterns and supporting switching frequencies beyond 15 MHz.Paper presented at the Applied Power Electronics Conference and Exposition, 2004. APEC’04. Nineteenth Annual IEEE.

XXI.Peterchev, A. V., & Sanders, S. R. (2001). Quantization resolution and limit cycling in digitally controlled PWM converters.Paper presented at the Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual.

XXII.Prodic, A., Maksimovic, D., & Erickson, R. W. (2001). Design and implementation of a digital PWM controller for a high-frequency switching DC-DC power converter.Paper presented at the Industrial Electronics Society, 2001. IECON’01. The 27th Annual Conference of the IEEE.

XXIII.Puukko, J., Nousiainen, L., Maki, A.,Messo, T., Huusari, J., & Suntio, T. (2012). Photovoltaic generator as an input source for power electronic converters.Paper presented at the Power Electronics and Motion Control Conference (EPE/PEMC), 2012 15th International.

XXIV.Rashid, M., & Press, C. (2010). Power Electronics Handbook. Devices, Circuits, and Applications.

XXV.Rehman, Z., Al-Bahadly, I., & Mukhopadhyay, S. (2015). Multiinput DC–DC converters in renewable energy applications–An overview. Renewable and Sustainable Energy Reviews, 41, 521-539.

XXVI.Sun, A., Tan, M. T., & Siek, L. (2010). Segmented Hybrid DPWM and tunable PID controller for digital DC-DC converters.Paper presented at the Next-Generation Electronics (ISNE), 2010 International Symposium on.

XXVII.Todorovic, M. H., Palma, L., & Enjeti, P. N. (2008). Design of a wide input range DC–DC converter with a robust power control scheme suitable for fuel cell power conversion. Industrial Electronics, IEEE Transactions on, 55(3), 1247-1255.

XXVIII. Wai, R.-J., & Jheng, K.-H. (2013). High-Efficiency Single-Input Multiple-Output DC–DC Converter. Power Electronics, IEEE Transactions on, 28(2), 886-898.

XXIX.Wang, W., Shen, Z., Tan, X., Yan, N., & Min, H. (2011). Improved delay-line based digital PWM for DC-DC converters. Electronics Letters, 47(9), 562-564.

XXX.Yazdani, A., & Iravani, R. (2006). A neutral-point clamped converter system for direct-drive variable-speed wind power unit. Energy Conversion, IEEE Transactions on, 21(2), 596-607.

XXXI.Yu, S.-H., Wu, T.-Y., & Wang, S.-H. (2013). Extension of Pulsewidth Modulation From Carrier-Based to Dither-Based. Industrial Informatics, IEEE Transactions on, 9(2), 1029-1036.

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