Fully Integrated Autonomous Interface With Maximum Power Point Tracking for Energy Harvesting TEGs With High Power Capacity

Date

2020-05-01

Author

Tabrizi, Hamed Osouli
Jayaweera, Herath M. P. C.
Muhtaroglu, Ali

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In this article, a novel fully autonomous and integrated power management interface circuit is introduced for energy harvesting using thermoelectric generators (TEGs) to supply power to Internet of Thing nodes. The circuit consists of a self-starting dc & x2013;dc converter based on a dual-phase charge pump with LC-tank oscillator, a digital MPPT unit, and a 1-V LDO regulator. The novel maximum power point tracking (MPPT) algorithm avoids open-circuit state, and accommodates varying input power and ultra-low voltage conditions. Validation data from the fabricated test-chip in 180 & x00A0;nm standard CMOS technology indicates the circuit start-up voltage is as low as 170 mV. The maximum output power capacity is 0.5 mW, which is the highest noted in the literature for a fully integrated solution. The high output power at low cost is achieved with a peak system efficiency of 30 & x0025;. The relatively low efficiency is expected, since the focus of the design is high power capacity at low cost. The MPPT algorithm reaches 98 & x0025; maximum accuracy for a source output resistance of 40 & x2126;, which is typical for wearable TEG modules.

Subject Keywords

Electrical and Electronic Engineering

URI

https://hdl.handle.net/11511/66819

Journal

IEEE TRANSACTIONS ON POWER ELECTRONICS

DOI

https://doi.org/10.1109/tpel.2019.2945913

Collections

Engineering, Article

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Citation Formats

H. O. Tabrizi, H. M. P. C. Jayaweera, and A. Muhtaroglu, “Fully Integrated Autonomous Interface With Maximum Power Point Tracking for Energy Harvesting TEGs With High Power Capacity,” IEEE TRANSACTIONS ON POWER ELECTRONICS, pp. 4905–4914, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66819.