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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Dual Mode Boost Converter for Energy Harvesting

에너지 하베스팅을 위한 이중 모드 부스트 컨버터

  • Park, Hyung-Ryul (Dept. of Electronics and Communication Engineering, Hanyang University) ;
  • Yeo, Jae-Jin (Dept. of Electronics and Communication Engineering, Hanyang University) ;
  • Roh, JeongJin (Dept. of Electronics and Communication Engineering, Hanyang University)
  • Received : 2015.10.23
  • Accepted : 2015.11.27
  • Published : 2015.12.31
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Abstract

This paper presents the design of dual mode boost converter for energy harvesting. The designed converter boosts low voltage from energy harvester through a startup circuit. When the voltage goes above predefined value, supplied voltage to startup circuit is blocked by voltage detector. Boost controller makes the boosted voltage into $V_{OUT}$. The proposed circuit consists of oscillator for charge pump, charge pump, pulse generator, voltage detector, and boost controller. The proposed converter is designed and fabricated using a $0.18{\mu}m$ CMOS process. The designed circuit shows that minimum input voltage is 600mV, output is 3V and startup time is 20ms. The boost converter achieves 47% efficiency at a load current of 3mA.

본 논문은 에너지 하베스팅용 이중 모드 부스트 컨버터 설계에 관한 것이다. 설계된 회로는 에너지 하베스팅에 의해 출력된 작은 전압으로부터 startup 회로를 통해 승압된 전압을 얻는다. 이 전압이 일정 전압 이상이 되면, 전압 감지기에 의해 startup 회로에 공급되는 전압이 차단이 된다. 승압된 전압은 부스트 컨트롤러에 의해 최종적으로 $V_{OUT}$이 된다. 회로는 크게 전하 펌프를 위한 오실레이터, 전하 펌프, 펄스 생성기, 전압 감지기, 부스트 컨트롤러로 구성되어있다. 매그나칩 / SK하이닉스의 $0.18{\mu}m$ CMOS 공정을 사용하였다. 설계된 회로는 테스트 결과 최소 입력 전압은 600mV이며, 출력은 3V이고, startup time은 20ms이다. 제작된 부스트 컨버터의 효율은 load current가 3mA일때, 47%로 측정되었다.

Keywords

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