Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Design of Step-down DC-DC Converter using Switched-capacitor for Small-sized Electronics Equipment

소형 전자기기를 위한 스위치드 커패시터 방식의 강압형 DC-DC 변환기 설계

  • Kwon, Bo-Min (Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University) ;
  • Heo, Yun-Seok (Department of Nano Engeering, Inje University) ;
  • Song, Han-Jung (Department of Nano Engeering, Inje University)
  • 권보민 (인제대학교 나노시스템공학과) ;
  • 허윤석 (인제대학교 나노공학부) ;
  • 송한정 (인제대학교 나노공학부)
  • Received : 2010.10.21
  • Accepted : 2010.12.17
  • Published : 2010.12.31
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Abstract

In this paper, a Step-down CMOS DC-DC Converter using low power switched capacitor method is designed in a 0.5 ${\mu}m$ technology for the integration of devices. Conventional DC-DC converter is used inductor that can store energy in a magnetic field but have low efficiency because power consumption is caused by magnetic flux. And there were problems with size, weight and price to integrate chip. In this paper, a proposed Inductorless step-down CMOS DC-DC converter of low power using SC method is designed in a 0.5um technology to solve these problems. Designed DC-DC converter have 96% power efficiency with 200kHz frequency by using cadence simulation.

기존의 DC-DC Converter에서는 전압 변화 및 에너지 축적소자로서 자성부품인 인덕터를 사용하여 자속 발생에 의한 전력 손실로 효율이 낮아지고, 자성부품의 부피가 크고 무거우며 가격이 비싸 반도체 칩으로 집적화하기에 문제점을 가지고 있다. 이러한 문제점을 개선하기 위해 본 논문에서는 인덕터없는 스위치드 커패시터 방식을 이용한 저전력 강압형 CMOS DC-DC Converter를 제안한다. 제안된 DC-DC Converter는 0.5um 공정을 이용하여 설계하였으며, 설계된 DC-DC 컨버터는 200kHz의 주파수로 동작하며 96%이상의 전력효율을 cadence 시뮬레이션을 통하여 얻을 수 있다.

Keywords

References

  1. 노대석, 윤기갑, 김의환, "저압배전선로에 연계된 분산전원의 과도특성 해석에 관한 연구", 한국산학기술학회, Vol. 11, No. 10, 2010. https://doi.org/10.5762/KAIS.2010.11.10.3898
  2. K. W. E. Cheng, M. Liu, and J.Wu, ""Chaos study and parameter-space analysis of the dc-dc buck-boost converter,"" Proc. IEE B, Elect. Power Appl., vol. 150, no. 2, pp. 126-138, 2003. https://doi.org/10.1049/ip-epa:20030228
  3. C. Batlle, I. Massana, and A. Miralles, "Lyapunov exponents for bilinear systems. Application to the buck converter," Int. J. Bifurc. Chaos, vol. 13, no. 3, pp. 713-722, 2003. https://doi.org/10.1142/S0218127403006868
  4. C. Y. Ho, B. W. Ling, Yan-Qun Liu, P. K. Tam, Kok-Lay Teo, "Optimal PWM Control of Switched-Capacitor DC-DC Power Converters via Model Transformation and Enhancing Control Techniques", Circuits and Systems, IEEE, vol. 55, pp. 1382-1391, 2008. https://doi.org/10.1109/TCSI.2008.916442
  5. G. Hoyler, "Voltage Multiplier with Integrated Metalized Switched-Mode Power Converter," Proceeding of the IEEE, Vol.76, pp.343-354, 1988. https://doi.org/10.1109/5.4421
  6. T. Das, P. Mandal, "Switched-Capacitor Based Buck Converter Design Using Current Limiter for Better Efficiency and Output Ripple", VLSI Design of IEEE, pp. 181-186, 2009.
  7. B. R. Gregoire, "A compact switched-capacitor regulated charge pump power supply," IEEE J. Solid-State Circuits, vol. 41, no. 8, pp. 1944-1953, Aug. 2006. https://doi.org/10.1109/JSSC.2006.875303
  8. H. Lee and P. K. T. Mok, "An SC voltage doubler with pseudocontinuous output regulation using a three-stage switchable opamp," IEEE J. Solid-State , vol. 42, no. 6, pp. 1216-1229, Jun. 2007. https://doi.org/10.1109/JSSC.2007.897133
  9. Linear Technology, "1.5A, 200kHz Step-Down Switching Regulator" LT1578 datasheet