Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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DC-DC Buck converter Using an Adjustable Dead-time Control Method

적응형 사구간제어기법을 이용한 DC-DC 벅 변환기

  • Lim, Dong-Kuyn (Dept. of Electronic Engineering, Inha University) ;
  • Yoo, Tai-Kyung (Dept. of Electronic Engineering, Inha University) ;
  • Lee, Gun (Dept. of Electronic Engineering, Inha University) ;
  • Yoon, Kwang-Sub (Dept. of Electronic Engineering, Inha University)
  • 임동균 (인하대학교 전자공학과) ;
  • 유태경 (인하대학교 전자공학과) ;
  • 이건 (인하대학교 전자공학과) ;
  • 윤광섭 (인하대학교 전자공학과)
  • Received : 2010.01.11
  • Accepted : 2011.05.30
  • Published : 2011.06.25
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Abstract

This paper proposes high efficiency current-mode DC-DC buck converter that are suitable for portable devices. The current-mode DC-DC buck converter using adjustable Dead-time control method improves the power efficiency 2~5%. The buck converter has been implemented with a standard 0.35${\mu}m$ CMOS process. The size of this chip is 0.97$mm^2$. The input range of the fabricated DC-DC buck converter is 2.5V~3.3V, and the output is 1.8V. The maximum loading current of the converter is 500mA and the peak efficiency is 93% at 200mA loads.

본 논문에서는 휴대기기를 위한 고효율 전류구동방식의 DC-DC 벅 변환기를 제안한다. 제안된 전류구동방식의 DC-DC 컨버터는 파워스위치의 전도손실을 최소화하는 적응형 사구간 제어기법을 적용하여 부하전류에 따라 효율을 2~5%이상 향상시킨다. 설계된 DC-DC 벅 변환기는 0.35${\mu}m$ CMOS공정을 이용하여 칩으로 제작 되었으며, 전체 칩의 크기는 0.97$mm^2$이다. 제작된 칩의 입력전압범위는 2.5V~3.3V이고, 출력전압은 1.8V이며 리플전압은 10mV이하로 나타내고 있다. 최대 500mA의 부하 전류에서 구동할 수 있도록 설계 하였고, 200mA에서 최대 93%의 전력효율을 나타내고 있다.

Keywords

References

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