Topology of non-inductive DC/DC converters  with galvanic isolated circuits

V. P. Babenko; V. K. Bityukov

doi:10.32362/2500-316X-2021-9-2-66-77

Topology of non-inductive DC/DC converters with galvanic isolated circuits

V. P. Babenko, V. K. Bityukov

https://doi.org/10.32362/2500-316X-2021-9-2-66-77

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Abstract

Non-inductive (throttle-free) DC/DC converters are used in low-power and highly integrated electronic systems. A circuit analysis of the basic topologies of non-inductive DC/DC charge-pumped converters which perform typical DC-voltage conversions, i.e., lowering, raising and inverting, was carried out. The galvanic isolation between the input and output circuits of the converter was achieved even in the integrated version due to forming a time delay of the switches (Dead Time, DT), commuting a “flying” capacitor, which is transferring the charge to the storage capacitor and the load. A circuit of the DT driver was developed and its parameters, at which the through-current flow in the switch is prevented and the conditions of galvanic isolation of the input and output circuits are satisfied, were studied. The simulation was built with a popular Electronics Workbench software, widely used in training of specialists in radio electronics at higher educational institutions. The results of the study of the basic power characteristics of DC/DC conversion, such as output current and voltage, voltage transfer coefficient, efficiency, output equivalent resistance, were presented. The efficiency of conversion was estimated by varying the capacities of the “flying” and storage capacitors, the resistance of the switches in the closed state, and the frequency of switching. It is proved that the charge pumping method is simple and effective at low load currents (mA units), when both the voltage transfer coefficient from input to output and efficiency are high, and are approaching to “one”. However, with the increase of the load current, the voltage transfer coefficient and efficiency decrease, the output voltage ripples increase.

Keywords

radio electronics, DC/DC, converter, current charge pumping, a charge pump, non-inductive, simulation, “flying” capacitor, filter capacitor, ripples, X-point

About the Authors

V. P. Babenko

MIREA – Russian Technological University
Russian Federation

Valery P. Babenko, Cand. Sci. (Eng.), Associate Professor, Associate Professor of the Department of Radio Wave Processes and Technologies, Institute of Radio Engineering and Telecommunication Systems

78, Vernadskogo pr., Moscow, 119454

V. K. Bityukov

MIREA – Russian Technological University
Russian Federation

Vladimir K. Bityukov, Dr. Sci. (Eng.), Professor, Professor of the Department of Radio Wave Processes and Technologies, Institute of Radio Engineering and Telecommunication Systems

78, Vernadskogo pr., Moscow, 119454

ResearcherID Y8325-2018, Scopus Author ID 6603797260

References

1. Yablokov D. Modern micro-consuming charge-pump DC/DC converters for battery powered devices. Komponenty i tekhnologii = Components and Technologies.2005;2:96−99 (in Russ.).

2. DC-DC conversion without inductors. Maxim Integrated Product. Appnote 725. Jul. 22, 2009. URL: https://pdfserv.maximintegrated.com/en/an/AN725.pdf

3. Ballo A., Grasso A.D., Palumbo G. A Review of Charge Pump Topologies for the Power Management of IoT Nodes. Electronics. 2019;8(5):480. https://doi.org/10.3390/electronics8050480

4. Bityukov V.K., Simachkov D.S., Babenko V.P. Istochniki vtorichnogo elektropitaniya(Secondary power supplies). Moscow: Infra-Inzheneriya; 2019. 376 p. (in Russ.). ISBN: 978-5-9729-0267-5

5. Lubarsky G. The forgotten converter. Charge-pump basics. Operation. Texas Instruments Incorporated. SLPY005. 2 July 2015. URL: http://www.ti.com/lit/wp/slpy005/slpy005.pdf

6. Onyshko D. DC/DC voltage converters on switched capacitors. Chip News. 2002;3. (in Russ.). URL: http://www.gaw.ru/html.cgi/txt/publ/_rtcs/90_pwm_C_MAX.htm

7. Zvonarev E. Texas Instruments solutions for AC/DC and DC/DC converters. Novosti elektroniki. 2007;9:6−12 (in Russ.).

8. Frenzel L. Charge pumps as an alternative to other types of stabilizers. RadioLotsman. 2017;12:32−35 (in Russ.).

9. Babenko V.P., Bityukov V.K. An integrated circuit for forming DEAD TIME drivers in power switches. Fundamental’nye problemy radioelektronnogo priborostroeniya = Fundamental problems of radioengineering and device construction.2018;18(3):615−620 (in Russ.).

10. Makarenko V.O. On the choice of parameters of DC/DC converters with charge pumps. Elektronnye komponenty i sistemy = Electronic Components and Systems. 2016;2:33−39 (in Russ.). URL: http://www.ekis.kiev.ua/UserFiles/Image/pdfArticles/2016_2/V.Makarenko_On%20the%20choice%20of%20parameters%20of%20DC-DC-converters%20with%20charge%20pumps_EKIS_2_2016-2.pdf

11. Babenko V.P., Bityukov V.K., Kuznetsov V.V., Simachkov D.S. Simulation of static and dynamic losses in MOSFET keys. Rossiiskii tekhnologicheskii zhurnal = Russian Technological Journal. 2018;6(1):20−39 (in Russ.). https://doi.org/10.32362/2500-316X-2018-6-1-20-39

12. Babenko V.P., Bityukov V.K. Simulation of switching of high-power FETs using the electronics Workbench Software. Journal of Communications Technology and Electronics. 2019;64(2):176−181. https://doi.org/10.1134/S1064226919020025[Babenko V.P., Bityukov V.K. Simulation of switching of highpower FETs using the electronics Workbench Software. Radiotekhnika i elektronika = Journal of Communications Technology and Electronics. 2019;64(2):199−205 (in Russ.)]

13. Kovaleva I.V., Luchaninov D.V. Overeview of modeling services and the development of electrical circuits. Postulat. 2018;2–1(28):5 (in Russ.). URL: https://www.elibrary.ru/item.asp?id=32676210

14. Wang C.-C., Wu J.-C. Efficiency Improvement in Charge Pump Circuits. IEEE J. Solid-State Circuits. 1997;32(6):852−860. https://doi.org/10.1109/4.585287

15. Hsu C.-P., Lin H. Analysis of power efficiency for four-phase positive charge pumps. In: Proceeding of the Fifth Lasted International Conference CIRCUITS, SIGNAL, and SYSTEMS. Banff. Alberta. Canada. July 2−4, 2007. URL: http://www.ee.nchu.edu.tw/Pic/Writings/2343_573-109.pdf

16. Vitchev V. Calculating Essential Charge-Pump Parameters. Maxim Integrated Products. July No. 1. 2006. Sunnyvale. California. URL: https://www.researchgate.net/publication/293714428_Calculating_essential_charge-pump_parameters

17. Bityukov V.K., Mironov A.V., Mikhnevich N.G., Petrov V.A. Charge pump system operation of DC–DC converter MAX1759 in the voltage boost mode. Vestnik Kontserna VKO Almaz-Antei = Bulletin of Concern PVO AlmazAntey. 2017;1(20):48−58 (in Russ.).

18. Bityukov V.K., Petrov V.A., Sotnikova A.A. Operation of MCP1253 DC/DC charge-pump converter MCP1253 in buck mode. Rossiiskii tekhnologicheskii zhurnal = Russian Technological Journal. 2017;5(4):13−21 (in Russ.). https://doi.org/10.32362/2500-316X-2017-5-4-13-21

19. Bityukov V.K., Ivanov A.A., Mironov A.V., Mikhnevich N.G., Perfil’ev V.S., Petrov V.A. A study of characteristics of microcircuits of secondary power sources with charge pump. Radiotekhnika = Radio Engineering. 2017;2:126−134 (in Russ.).

20. Bityukov V.K., Ivanov A.A., Mironov A.V., Mikhnevich N.G., Perfil’ev V.S., Petrov V.A. Test bench for studying characteristics of integrated circuit chips of secondary regulated charge pump power supply. Rossiiskii tekhnologicheskii zhurnal = Russian Technological Journal. 2016;4(3):37−52 (in Russ.). https://doi.org/10.32362/2500-316X-2016-4-3-37-52

21. Nikitin E. Methods for reducing input ripple for charge-pump converters. Komponenty i tekhnologii = Components and Technologies. 2003;5:58−60 (in Russ.).

22. Barbehenn G.H. Low-noise step up/down adjustable voltage converter with an output current of 250 mA based on a charge pump. RadioLotsman. 2014;2:31−34 (in Russ.).

23. Bityukov V.K., Mikhnevich N.G., Petrov V.A. Simulation of negative voltage ripples at the output of charge pump system and the microcircuit output of bipolar LM27762 DC–DC converte. Rossiiskii tekhnologicheskii zhurnal = Russian Technological Journal. 2020;8(1):80−96 (in Russ.). https://doi.org/10.32362/2500-316X-2020-8-1-80-96

24. Latyev L.N., Petrov V.A., Chekhovskoi V. Ya., Shestakov E.N. Izluchatel’nye svoistva tverdykh materialov. Spravochnik(Emissivity of solid materials. Handbook), Sheindlin A.Е. (Ed.) Мoscow: Energiya; 1974. 472 p. (in Russ.).

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Non-inductive DC/DC converters are used in low-power and highly integrated electronic systems. A circuit analysis of the basic topologies of non-inductive DC/DC charge-pumped converters which perform typical DC-voltage conversions, i.e., lowering, raising and inverting, was carried out. The galvanic isolation between the input and output circuits of the converter was achieved even in the integrated version due to forming a time delay of the switches, commuting a “flying” capacitor, which is transferring the charge to the storage capacitor and the load.

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For citations:

Babenko V.P., Bityukov V.K. Topology of non-inductive DC/DC converters with galvanic isolated circuits. Russian Technological Journal. 2021;9(2):66-77. (In Russ.) https://doi.org/10.32362/2500-316X-2021-9-2-66-77

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	Title	Неозаглавлен
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	Title	The charge cycle of the "flying" capacitor in the repeater mode
	Type	Исследовательские инструменты
	Date	2021-04-28

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