A Simultaneous Energy Transferring SIBO Converter Achieving Low Ripple and High Efficiency for AMOLED Applications
This article presents a single-inductor bipolar-output (SIBO) converter for active-matrix organic light-emitting diode (AMOLED) displays to reduce output ripples and enhance power conversion efficiency (PCE). We propose the simultaneous energy transferring SIBO (SETSIBO) converter, which generates b...
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Published in | IEEE journal of solid-state circuits Vol. 59; no. 5; pp. 1497 - 1508 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.05.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | This article presents a single-inductor bipolar-output (SIBO) converter for active-matrix organic light-emitting diode (AMOLED) displays to reduce output ripples and enhance power conversion efficiency (PCE). We propose the simultaneous energy transferring SIBO (SETSIBO) converter, which generates bipolar outputs with only a two-phase operation and does not require additional switching. The hybrid power stage with a flying capacitor and two-phase operation reduces the dc value of the inductor current, which mitigates conduction losses and output ripples; moreover, the hybrid power stage allows the high-voltage switches in the conventional converters to be replaced by low-voltage switches. The inductor current reduction and the low-voltage power switch use improve the PCE. This article analyzes the proposed converter's output ripple reduction and the PCE improvements; furthermore, the load imbalance is effectively compensated with the proposed SETSIBO converter. The prototype of the proposed SETSIBO is fabricated in a 0.5-<inline-formula> <tex-math notation="LaTeX">\mu \text{m} </tex-math></inline-formula> CMOS process. The measured ripples at positive and negative outputs are 24.5 and 28 mV, respectively, with a 300 mA load current <inline-formula> <tex-math notation="LaTeX">I_{\mathrm {o}} </tex-math></inline-formula>. The measured peak PCE is 94.1%, and the active area is 1.46 mm2. |
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ISSN: | 0018-9200 1558-173X |
DOI: | 10.1109/JSSC.2023.3314834 |