Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Hybrid DC-DC Converter For Power Efficiency Improvement Operating Over a Wide Load Power

넓은 부하전력에서 동작하는 전력 효율 향상을 위한 하이브리드 DC-DC 컨버터

  • Woo, Ki-Chan (School of Electrical Engineering and Computer Science Graduate School of Chungbuk National University) ;
  • Mok, Jin-Won (Silliconworks) ;
  • Kim, Tae-Woo (School of Electrical Engineering and Computer Science Graduate School of Chungbuk National University) ;
  • Hwang, Seon-Kwang (School of Electrical Engineering and Computer Science Graduate School of Chungbuk National University) ;
  • Yang, Byung-Do (Department of Electronics Engineering, Chungbuk National University)
  • Received : 2016.07.25
  • Accepted : 2016.08.08
  • Published : 2016.09.30
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Abstract

This paper proposed hybrid converter to operate over a wide output load power. The switched-capacitor converter has a high efficiency at low load power and a low efficiency at high load power. On the contrary, the buck converter has a high efficiency at high load power and a low efficiency at low load power. The proposed hybrid converter has combination of the switched-capacitor converter and the buck converter. The switched-capacitor operates at low load power and buck converter operates at high load power, so that the hybrid converter is improved power efficiency at wide output load power. The hybrid converter was implemented with a $0.18{\mu}m$ CMOS process. The hybrid converter has a range of the load power between $50{\mu}W$and 100mW. The maximum power efficiencies are 93% and 77% at the buck converter and the switched-capacitor converter, respectively.

본 논문에서는 넓은 출력 부하 전력에서도 동작하는 하이브리드 변환기를 제안했다. 스위치드 커패시터 변환기는 높은 부하 전력에서 효율이 낮고, 낮은 부하 전력에서는 효율이 높다. 반대로, 벅 변환기는 높은 부하 전력에서는 효율이 높고, 낮은 부하 전력에서는 효율이 낮다. 제안된 하이브리드 변환기는 스위치드 커패시터 변환기와 벅 변환기를 혼합했다. 낮은 부하 전력에서는 스위치드 커패시터 변환기를 동작시키고, 높은 부하에서는 벅 변환기를 동작시켜, 넓은 출력 부하 전력에서 전력 효율을 향상시켰다. 제안된 하이브리드 변환기는 $0.18{\mu}m$ CMOS 공정으로 구현되었다. 하이브리드 변환기의 출력 부하 전력 범위는 0.05~100mW 이며, 벅 변환기와 스위치드 커패시터 변환기에서 각각 93%와 77%의 최대 전력 효율을 가진다.

Keywords

References

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