Xufeng Liao;Jiabin Wang;Peiyuan Fu;Yu Du;Lianxi Liu
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A hysteresis-controlled maximum power point tracking (MPPT) technique is proposed to track the variation of the internal resistance <inline-formula> <tex-math>$\\text {R}_{\\text {TE}}$ </tex-math></inline-formula> of the thermoelectric generator (TEG), which achieves high tracking efficiency over a wide <inline-formula> <tex-math>$\\text {R}_{\\text {TE}}$ </tex-math></inline-formula> range. By trading the tracking efficiency and loss off in the MPPT, an optimization method for hysteresis window is proposed. In addition, an analog zero-crossing detector (ZCD) without calibration is adopted to improve the end-to-end efficiency. The proposed hybrid interface is realized by 0.18-<inline-formula> <tex-math>$\\mu $ </tex-math></inline-formula>m standard CMOS process with a core area of <inline-formula> <tex-math>$0.91 \\times 0.61$ </tex-math></inline-formula> mm2. Measured results show that the proposed interface can harvest TE over the <inline-formula> <tex-math>$\\text {R}_{\\text {TE}}$ </tex-math></inline-formula> variation range of 1–<inline-formula> <tex-math>$1000 \\; \\Omega $ </tex-math></inline-formula>, with a peak tracking efficiency of 99.6% and an output ripple as low as 35 mV. It also achieves a peak end-to-end efficiency of 87% and an output power range of <inline-formula> <tex-math>$1 \\; \\mu $ </tex-math></inline-formula>W −10 mW.","PeriodicalId":13425,"journal":{"name":"IEEE Transactions on Very Large Scale Integration (VLSI) Systems","volume":"33 6","pages":"1541-1550"},"PeriodicalIF":2.8000,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Low-Ripple DIDO DC–DC Hybrid Interface With Optimal-Hysteresis-Controlled MPPT for TEH\",\"authors\":\"Xufeng Liao;Jiabin Wang;Peiyuan Fu;Yu Du;Lianxi Liu\",\"doi\":\"10.1109/TVLSI.2025.3540106\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This article proposes a dual-input-dual-output (DIDO) dc-dc hybrid interface for thermoelectric energy harvesting (TEH) applications with high efficiency and low output ripple. A load-first ordered power distributive control (OPDC) strategy is used to recycle the excess thermoelectric energy (TE) in time. Utilizing the digital adaptive <sc>on</small>-time (DAOT) technique, the output ripple can be reduced during battery (BAT) power supply. A hysteresis-controlled maximum power point tracking (MPPT) technique is proposed to track the variation of the internal resistance <inline-formula> <tex-math>$\\\\text {R}_{\\\\text {TE}}$ </tex-math></inline-formula> of the thermoelectric generator (TEG), which achieves high tracking efficiency over a wide <inline-formula> <tex-math>$\\\\text {R}_{\\\\text {TE}}$ </tex-math></inline-formula> range. By trading the tracking efficiency and loss off in the MPPT, an optimization method for hysteresis window is proposed. In addition, an analog zero-crossing detector (ZCD) without calibration is adopted to improve the end-to-end efficiency. The proposed hybrid interface is realized by 0.18-<inline-formula> <tex-math>$\\\\mu $ </tex-math></inline-formula>m standard CMOS process with a core area of <inline-formula> <tex-math>$0.91 \\\\times 0.61$ </tex-math></inline-formula> mm2. Measured results show that the proposed interface can harvest TE over the <inline-formula> <tex-math>$\\\\text {R}_{\\\\text {TE}}$ </tex-math></inline-formula> variation range of 1–<inline-formula> <tex-math>$1000 \\\\; \\\\Omega $ </tex-math></inline-formula>, with a peak tracking efficiency of 99.6% and an output ripple as low as 35 mV. 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引用次数: 0
摘要
本文提出了一种用于热电能量收集(TEH)应用的双输入双输出(DIDO) dc-dc混合接口,具有高效率和低输出纹波。采用负荷优先的有序功率分配控制(OPDC)策略,及时回收多余的热电能量。利用数字自适应准时(DAOT)技术,可以降低电池供电时的输出纹波。提出了一种迟滞控制的最大功率点跟踪技术(MPPT),用于跟踪热电发电机(TEG)内阻$\text {R}_{\text {TE}}$的变化,在$\text {R}_{\text {TE}}$宽范围内实现了较高的跟踪效率。通过权衡MPPT的跟踪效率和损失,提出了一种迟滞窗口的优化方法。此外,为了提高端到端效率,还采用了一种无需校准的模拟过零检测器(ZCD)。该混合接口采用0.18- $\mu $ m标准CMOS工艺实现,核心面积为$0.91 \times 0.61$ mm2。实测结果表明,该界面可在$\text {R}_{\text {TE}}$变化范围1 ~ $1000 \; \Omega $内获取TE,峰值跟踪效率为99.6% and an output ripple as low as 35 mV. It also achieves a peak end-to-end efficiency of 87% and an output power range of $1 \; \mu $ W −10 mW.
A Low-Ripple DIDO DC–DC Hybrid Interface With Optimal-Hysteresis-Controlled MPPT for TEH
This article proposes a dual-input-dual-output (DIDO) dc-dc hybrid interface for thermoelectric energy harvesting (TEH) applications with high efficiency and low output ripple. A load-first ordered power distributive control (OPDC) strategy is used to recycle the excess thermoelectric energy (TE) in time. Utilizing the digital adaptive on-time (DAOT) technique, the output ripple can be reduced during battery (BAT) power supply. A hysteresis-controlled maximum power point tracking (MPPT) technique is proposed to track the variation of the internal resistance $\text {R}_{\text {TE}}$ of the thermoelectric generator (TEG), which achieves high tracking efficiency over a wide $\text {R}_{\text {TE}}$ range. By trading the tracking efficiency and loss off in the MPPT, an optimization method for hysteresis window is proposed. In addition, an analog zero-crossing detector (ZCD) without calibration is adopted to improve the end-to-end efficiency. The proposed hybrid interface is realized by 0.18-$\mu $ m standard CMOS process with a core area of $0.91 \times 0.61$ mm2. Measured results show that the proposed interface can harvest TE over the $\text {R}_{\text {TE}}$ variation range of 1–$1000 \; \Omega $ , with a peak tracking efficiency of 99.6% and an output ripple as low as 35 mV. It also achieves a peak end-to-end efficiency of 87% and an output power range of $1 \; \mu $ W −10 mW.
期刊介绍:
The IEEE Transactions on VLSI Systems is published as a monthly journal under the co-sponsorship of the IEEE Circuits and Systems Society, the IEEE Computer Society, and the IEEE Solid-State Circuits Society.
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