A photovoltaic (PV) energy harvesting chip with novel multiplier-based perturb and observe (P&O) maximum power point tracking (MPPT) circuit for Internet - of-Things applications is proposed, and it can be powered by only a small PV module. The proposed P&O MPPT circuit can accurately detect the maximum power point of the PV module without using a power-hungry microcontroller or inaccurate analog multiplier. Instead, a high-accuracy pulse-based multiplier is proposed. Its input signals are analog, while its output signal is digital. Moreover, a new MPPT controller based on the proposed multiplier is also presented. The chip was fabricated using a 0.18 μ m 1P6M mixed-signal CMOS process. According to the measured results, the available power from the chosen PV module is 0.1–3 mW, the maximum tracking efficiency of the proposed MPPT circuit is 99.3%, and the maximum total efficiency of the proposed harvesting chip is 94.7%.

中文翻译：

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具有P&O最大功率点跟踪电路和新型脉冲乘法器的光伏能量收集芯片

一种具有新型基于乘法器的扰动观察 (P&O) 最大功率点跟踪 (MPPT) 电路的光伏 (PV) 能量收集芯片，用于互联网 - of Things 应用被提出，它可以只由一个小的光伏组件供电。所提出的 P&O MPPT 电路可以准确检测 PV 模块的最大功率点，而无需使用耗电的微控制器或不准确的模拟乘法器。相反，提出了一种基于脉冲的高精度乘法器。它的输入信号是模拟信号，而它的输出信号是数字信号。此外，还提出了一种基于所提出的乘法器的新 MPPT 控制器。该芯片使用 0.18μm 1P6M 混合信号 CMOS 工艺。根据测量结果，所选光伏组件的可用功率为 0.1-3 mW，所提出的 MPPT 电路的最大跟踪效率为 99.3%，所提出的收集芯片的最大总效率为 94.7%。