A Hybrid Converter With Dual Outputs for Low Cross Regulation and Improved Current Balance

The discontinuous energy transfer characteristics of traditional single-inductor dual-output converters can lead to large output voltage ripple and cross-regulation. Thus, this article presents a double step-down dual-output converter implemented in a 0.15 μ m bipolar-CMOS-DMOS (BCD) process, adopti...

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Veröffentlicht in:IEEE transactions on power electronics 2024-08, Vol.39 (8), p.9591-9601
Hauptverfasser: Lee, Sheng Cheng, Chien, Min-Chu, Hung, Wei-Chieh, Chen, Cheng-Wen, Huang, Yu-Wei, Chen, An, Yang, Zhen-Yu, Chen, Ke-Horng, Zheng, Kuo-Lin, Lin, Ying-Hsi, Lin, Shian-Ru, Tsai, Tsung-Yen
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Sprache:eng
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Zusammenfassung:The discontinuous energy transfer characteristics of traditional single-inductor dual-output converters can lead to large output voltage ripple and cross-regulation. Thus, this article presents a double step-down dual-output converter implemented in a 0.15 μ m bipolar-CMOS-DMOS (BCD) process, adopting hybrid sum and deviation control to achieve a small output voltage ripple of 25 mV and minimize cross-regulation to 0.025 mV/mA. The timing balance mechanism generates the replicated on-time and calibrates by sensing inductor current mismatch, which improves current balance by 90%. The proposed pulse-based highly robust high-speed low stress level shifter enhances transition speed during load transients while reducing the voltage stress on low voltage device.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2024.3394804