A 4.5-to-16μW integrated triboelectric energy-harvesting system based on high-voltage dual-input buck converter with MPPT and 70V maximum input voltage

Abstract

As a newly emerging energy source, a triboelectric nanogenerator (TENG) was introduced in 2012, and various types of energy harvesters and active sensors based on the TENG have since been developed. Although research in the material-engineering field is actively conducted, there is not much research on TENG energy-harvesting circuits in the integrated-circuits field. From the viewpoint of material engineering, much research focuses on the applications and the analysis of instantaneous power. However, topics such as rms maximum power point (MPP), spice modeling, and impedance matching are more important from the circuit designer's viewpoint. This paper presents a TENG energy-harvesting circuit designed as a high-voltage (HV) dual-input (DI) buck converter with MPP tracking (MPPT) based on the proposed MPP analysis for the TENG.