A novel MPPT circuit with 99.1% tracking accuracy for energy harvesting

作者：Li, Yani^*; Tang, Ziyue; Zhu, Zhangming; Yang, Yintang

来源：Analog Integrated Circuits and Signal Processing, 2018, 94(1): 105-115.

DOI：10.1007/s10470-017-1079-z

• MPPT
• Analog multiplier
• Self-powered common-gate comparator
• Energy harvesting
• High efficiency

A novel maximum power point tracking (MPPT) circuit based on Buck-Boost converter is presented for micro-power energy harvesting, which efficiently improves the power efficiency and robustness of system. The proposed MPPT uses the low-power analog multiplier and multi-outputs self-powered common-gate comparator to track the input power, and simplifies data calculation and structure greatly. The fast dynamic switching circuit and digital control circuit are introduced to enhance the adaptability and flexibility of system. The performance of whole converter was validated by the simulation results in a 65-nm CMOS process. The minimum starting voltage is 0.15 V. The peak output power is 40.5 A mu W, with a power loss of 14.1 A mu W. The peak power efficiency and peak tracking efficiency are 92.1 and 99.1%, respectively. The proposed MPPT has the advantages such as low power, high efficiency, fast tracking speed, simple structure.

• 出版日期2018-1
• 单位西安电子科技大学