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http://dx.doi.org/10.7471/ikeee.2019.23.3.1104

DC-DC Boost Converter Using Dead Time Controller for Wearable AMOLED Display  

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)
Publication Information
Journal of IKEEE / v.23, no.3, 2019 , pp. 1104-1107 More about this Journal
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.
Keywords
AMOLED; boost converter; PWM; PWM-SPWM; dead time;
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