전기전자학회논문지 (Journal of IKEEE)

  • 제23권3호
  • /
  • Pages.1061-1067
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  • 2019
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  • 1226-7244(pISSN)
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  • 2288-243X(eISSN)
한국전기전자학회 (Institute of Korean Electrical and Electronics Engineers)
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PTWS를 적용한 웨어러블 AMOLED용 고집적화 3-채널 DC-DC 변환기 설계

Design of Highly Integrated 3-Channel DC-DC Converter Using PTWS for Wearable AMOLED

  • Jeon, Seung-Ki (School of Electrical and Computer Engineering, Chungbuk National University) ;
  • Lee, Hui-Jin (School of Electrical and Computer Engineering, Chungbuk National University) ;
  • Choi, Ho-Yong (School of Electrical and Computer Engineering, Chungbuk National University)
  • 투고 : 2019.09.05
  • 심사 : 2019.09.27
  • 발행 : 2019.09.30
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초록

본 논문에서는 PTWS 방식을 이용한 고집적화된 AMOLED용 3-채널 DC-DC 변환기의 설계한다. 양의 전압 $V_{POS}$는 경부하에서 효율을 제고하기 위해 SPWM 듀얼모드와 PTWS 방식을 적용한 부스트 변환기로 설계한다. 음의 전압 $V_{NEG}$는 전력 손실을 줄이기 위해 PSM 방식을 적용한 0.5x 인버팅 차지펌프를 이용해 설계하고, 추가적인 전압 $V_{AVDD}$는 LDO를 이용하여 설계한다. 제안된 DC-DC 변환기는 $0.18{\mu}m$ BCDMOS 공정을 사용하여 시뮬레이션을 한 결과 부하전류 1mA~70mA에서 전력효율 56.9%~90.2%를 가지고, 양의 전압 $V_{POS}$에서 최대 5mV의 출력 리플을 가졌다.

In this paper, a highly integrated 3-channel DC-DC converter is designed using power transistor width scaling (PTWS). For positive voltage, $V_{POS}$, a boost converter is designed using the set-time variable pulse width modultaion (SPWM) dual-mode and PTWS to improve efficiency at light load. For negative voltage, $V_{NEG}$, a 0.5 x regulated inverting charge pump is designed with pulse skipping modulation (PSM) controller to reduce power consumption, and for an additional positive voltage, $V_{AVDD}$, a LDO circuit is designed. The proposed DC-DC converter has been designed using a $0.18{\mu}m$ BCDMOS process. Simulation results show that the proposed converter has power efficiency of 56%~90% for load current range of 1 mA~70 mA and output ripple voltage less than 5 mV at positive voltage.

키워드

참고문헌

  1. S. Forrest, P. Burrows, and M. Thompson, "The Dawn of Organic Electronics," IEEE Spectrum, vol.37, no.8, pp.29-34, 2000. DOI: 10.1109/6.861775
  2. Ying Wang, "Design for OLED microdisplay," Proc. of 2010 Asia Pacific Conf. in Microelectronics and Electronics, pp.206-209, 2010. DOI: 10.1109/PRIMEASIA.2010.5604924
  3. Vaibhav Vaidya, Susan Soggs, Jungbae Kim, Andreas Haldi, Joshua N. Haddock, Bernard Kippelen and Denise M. Wilson, "Comparison of Pentacene and Amorphous Silicon AMOLED Display Driver Circuits," IEEE Transaction on Circuits and Systems-I, vol.55, no.5, pp.1177-1184, 2008. DOI: 10.1109/TCSI.2008.916548
  4. Seok Lee, Jayang Yoon, Jaehoon Kim, Changsuk Lee, Hawoong Jung, Jaeshin Lee, and Joongho Choi, "High-capacity DC-DC converters for active matrix OLED display," Proc. 2010 IEEE Asia Pacific Conference on Circuits and Systems. pp. 480-483, 2010. DOI: 10.1109/APCCAS.2010.5775053
  5. Sung-Wan Hong, Sang-Hui Park, Tae-Hwang Kong, and Gyu-Hyeong Cho, "Inverting Buck-Boost DC-DC Converter for Mobile AMOLED Display Using Real-Time Self-Tuned Minimum Power-Loss Tracking (MPLT) Scheme with Lossless Soft-Switching for Discontinuous Conduction Mode," IEEE Journal of Solid-State Circuits, Vol.50, no.10, pp.2380-2393, 2015. DOI: 10.1109/JSSC.2015.2450713
  6. Filippo Boera, Arunkumar Salimath, Edoardo Bonizzoni, and Franco Maloberti, "Design of a SIBO DC-DC Converter for AMOLED Display Driving," Proc. of 2018 Conf. in Microelectronics and Electronics, pp.109-112, 2018. DOI: 10.1109/PRIME.2018.8430357
  7. Bong-Choon Kwak, Seong-Kwan Hong, and Oh-Kyong Kwon, "A Highly Power-Efficient Single-Inductor Bipolar-Output DC-DC Converter Using Hysteretic Skipping Control for OLED-on-Silicon Microdisplays," IEEE Transactions on Circuits and Systems II: Express Briefs, vol.65, no.12, pp.2017-2021, 2018. DOI: 10.1109/TCSII.2018.2815994
  8. C. S. Chae, H. P. Le, K. C. Lee, G. H. Cho, and G. H. Cho, "A Single Inductor Step-Up DC-DC Switching Converter With Bipolar Outputs for Active Matrix OLED Mobile Display Panels," IEEE Journal of Solid-State Circuits, vol.44, no.2, pp.509-524, 2009. DOI: 10.1109/ISSCC.2007.373625
  9. D. Ma, W.-H. Ki, C. Y. Tsui, P. K and T. Mok, "Single-inductor multiple-output switching converters with time-multiplexing control in discontinuous conduction mode," IEEE J. Solid-State Circuits, vol.38, no.1, pp.89-100, 2003. DOI: 10.1109/JSSC.2002.806279
  10. D. Kwon, G and A. Rincon-Mora, "Single-Inductor Multiple-Output Switching DC-DC Converters," IEEE Transactions on Circuits and Systems II: Express Briefs, vol.56, no.8, pp.614-618, 2009. DOI: 10.1109/TCSII.2009.2025629
  11. Hak-Yun Kim, Myeong-Hak Lee, Young-Ho Shin, Jin-Won Kim, Nam-Soo Kim, and Ho-Yong Choi, "Dual-mode Inverting Buckboost Converter using Set-time Variable PWM Method," Journal of Semiconductor Technology and Science, vol.18, no.4, 2018. DOI: 10.5573/JSTS.2018.18.4.423