A 96.4%-Efficiency Single-Duty-Cycled Buck-Boost Converter Achieving 1.9mV Ripple and 2.1mV Mode-Change Fluctuation for Mobile OLED Displays

This paper presents a single-duty-cycled buck-boost (SDC-BB) converter for powering mobile OLEDs. Its features include a low output ripple and the ability to seamlessly cover all conversion ratios using a single duty-cycle (D) , effectively suppressing output fluctuations during transitions between...

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Bibliographic Details
Published in2024 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) pp. 1 - 2
Main Authors Kim, Jae-Hyun, Park, Yousung, Kwon, Doyoung, Kim, Dong-Kyu, Park, Sung-Chun, Lee, Yongjae, Lee, Jung-Bong, Kim, Hyun-Sik
Format Conference Proceeding
LanguageEnglish
Published IEEE 16.06.2024
Subjects
Capacitors
Fluctuations
Logic gates
Noise
Organic light emitting diodes
Time division multiple access
Very large scale integration
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Summary:This paper presents a single-duty-cycled buck-boost (SDC-BB) converter for powering mobile OLEDs. Its features include a low output ripple and the ability to seamlessly cover all conversion ratios using a single duty-cycle (D) , effectively suppressing output fluctuations during transitions between boost and buck modes. In its implementation, the flying capacitor is reused for the gate drives, thereby eliminating bootstrap overhead, and an adaptive ramp generator is incorporated to enhance immunity to TDMA noise. The chip fabricated in 0.18\mu \mathrm{m} achieves output ripples of ≤1.9mV and a peak efficiency of 96.4%. It maintains output fluctuations within 2.1mV during transitions between buck and boost modes, ensuring flicker-free displays.
ISSN:2158-9682
DOI:10.1109/VLSITechnologyandCir46783.2024.10631321