A low voltage input boost converter with novel switch driver enhancement technology for indoor solar energy harvesting

IF 2.2 3区工程技术 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Integration-The Vlsi Journal Pub Date : 2024-05-28 DOI:10.1016/j.vlsi.2024.102214

Xiwen Zhu, Kaixuan Xu, Mingxue Li, Yufeng Zhang

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Abstract

In the indoor environment, the output voltage of a small photovoltaic cell is usually too low to charge the battery or utilize it directly. As a result, this paper proposed a low-voltage input boost converter with novel switch driver enhancement technology for indoor solar energy harvesting. The boost converter utilized switched-capacitor charge pump architecture. Compared with conventional charge pumps, the proposed boost converter uses driver enhancement technology, which improves the output current ability of the circuit and power conversion efficiency. Besides, an adaptive dead-time circuit is designed to further optimize conversion efficiency at low input voltage. The integrated circuit (IC) of the boost converter has been manufactured in a 180 nm BCD process and occupies an active chip area of 1.6mm × 0.6 mm. Experimental measurement results confirm that the voltage boost converter increased the input voltage by four times. And the lowest start-up voltage is 0.12 V. The voltage conversion efficiency is 98 % and the highest power conversion efficiency is 76.7 % at Vin of 0.5 V. The design is suitable for indoor solar energy harvesting.

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采用新型开关驱动器增强技术的低压输入升压转换器，适用于室内太阳能收集

在室内环境中，小型光伏电池的输出电压通常过低，无法为电池充电或直接利用。因此，本文提出了一种采用新型开关驱动器增强技术的低压输入升压转换器，用于室内太阳能收集。该升压转换器采用了开关电容充电泵架构。与传统的电荷泵相比，本文提出的升压转换器采用了驱动增强技术，从而提高了电路的输出电流能力和功率转换效率。此外，还设计了自适应死区时间电路，以进一步优化低输入电压下的转换效率。升压转换器的集成电路（IC）采用 180 nm BCD 工艺制造，有效芯片面积为 1.6 mm × 0.6 mm。实验测量结果证实，升压转换器将输入电压提高了四倍。电压转换效率为 98%，当 Vin 为 0.5 V 时，最高功率转换效率为 76.7%。该设计适用于室内太阳能收集。

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来源期刊

Integration-The Vlsi Journal 工程技术-工程：电子与电气

CiteScore

3.80

自引率

5.30%

发文量

107

审稿时长

6 months

期刊介绍： Integration''s aim is to cover every aspect of the VLSI area, with an emphasis on cross-fertilization between various fields of science, and the design, verification, test and applications of integrated circuits and systems, as well as closely related topics in process and device technologies. Individual issues will feature peer-reviewed tutorials and articles as well as reviews of recent publications. The intended coverage of the journal can be assessed by examining the following (non-exclusive) list of topics: Specification methods and languages; Analog/Digital Integrated Circuits and Systems; VLSI architectures; Algorithms, methods and tools for modeling, simulation, synthesis and verification of integrated circuits and systems of any complexity; Embedded systems; High-level synthesis for VLSI systems; Logic synthesis and finite automata; Testing, design-for-test and test generation algorithms; Physical design; Formal verification; Algorithms implemented in VLSI systems; Systems engineering; Heterogeneous systems.