| Autor: |
Park, Hyo-Jin, Cho, Joo-Mi, Choi, Hyeon-Ji, Lee, Chan-Ho, Jeon, Young-Jun, Shin, Jeeyoung, Choi, Woong, Jeong, Junwon, Hong, Sung-Wan |
| Zdroj: |
IEEE Journal of Solid-State Circuits; 2024, Vol. 59 Issue: 5 p1497-1508, 12p |
| Abstrakt: |
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- $\mu \text{m}$ CMOS process. The measured ripples at positive and negative outputs are 24.5 and 28 mV, respectively, with a 300 mA load current $I_{\mathrm {o}}$ . The measured peak PCE is 94.1%, and the active area is 1.46 mm2. |
| Databáze: |
Supplemental Index |
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