[K-9] Advanced Device-based Circuits and Power Management Systems

[K-9-07] Switched-Capacitor Voltage Boost Converter with Digital Maximum Power Point Tracking for Low-Voltage Energy Harvesting

〇Kaori Matsumoto^1,2, Ryuki Ikeda², Hikaru Sebe², Nobutaka Kuroki¹, Masahiro Numa¹, Daisuke Kanemoto², Tetsuya Hirose² (1. Kobe Univ. (Japan), 2. Osaka Univ. (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.K-9-07

This paper presents an ultra-low-power switched-capacitor (SC) voltage boost converter (VBC) with a digital maximum power point tracking (MPPT) control circuit for low-voltage energy harvesting. The proposed digital MPPT control circuit converts analog voltage information of the PV cell into digital values and extracts the maximum power regardless of the harvester’s conditions and load current. Measurement results demonstrated that our proposed digital MPPT control circuit can track the maximum power point of the PV cell successfully. The proposed PMS generated a 2.58-V output voltage from a 0.46-V input voltage. The maxi-mum power conversion efficiency was 63%.