Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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DC-DC Boost Converter Using Dead Time Controller for Wearable AMOLED Display

데드 타임 제어기를 이용한 웨어러블 AMOLED 디스플레이용 DC-DC 부스트 변환기

  • Kim, Chan-You (School of Electrical and Computer Engineering & The Research Institute for Computer and Information Communication, Chungbuk National University) ;
  • Kim, Tae-Un (School of Electrical and Computer Engineering & The Research Institute for Computer and Information Communication, Chungbuk National University) ;
  • Choi, Ho-Yong (School of Electrical and Computer Engineering & The Research Institute for Computer and Information Communication, Chungbuk National University)
  • Received : 2019.09.05
  • Accepted : 2019.09.27
  • Published : 2019.09.30
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Abstract

This paper proposes a DC-DC boost converter for wearable AMOLED display using dead time controller to reduce dead time and improve power efficiency. Also the DC-DC boost converter adopts PWM-SPWM (set-time variable pulse width modulation) dual-mode to enhance power efficiency under light load and decrease output voltage ripple. The proposed circuit has been designed using $0.18{\mu}m$ BCDMOS process. Simulation results show that the circuit has power efficiency of 39%~96% and output ripple voltage of 2 mV under load current range of 1 mA~70 mA. The power efficiency of the proposed circuit is up to 2% higher than the previous PWM-SPWM method and up to 8% higher than only PWM method.

본 논문에서는 데드 타임을 줄여 전력 효율을 높이기 위해 데드 타임 제어기를 이용한 웨어러블 AMOLED 디스플레이용 DC-DC 부스트 변환기를 제안한다. 또한, 본 변환기에서는 경부하에서 전력 효율을 높이고 출력 전압 리플을 감소시키기 위해 PWM-SPWM (set-time variable pulse width modulation) 듀얼 모드를 이용한다. 제안하는 회로는 $0.18{\mu}m$ BCDMOS 공정을 이용하여 시뮬레이션을 한 결과 1 mA~70 mA의 부하 전류 범위에서 39%~96%의 전력 효율과 2 mV의 리플 전압을 가졌다. 본 회로의 전력 효율은 PWM-SPWM 방식보다 최대 2% 상승하였고, PWM 방식보다 최대 8% 상승하였다.

Keywords

References

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