A Universal Energy Harvesting System for Ultra-Low Power Management and IoT Applications

This paper reports the architecture and realization of an autonomous energy scavenging system operating in intermittent mode. The system consists of a self-conducted power management circuit (PMC), an energy harvesting device, a battery charging circuit, and an electronic load. This circuit is developed herein to achieve a stable output power with a wide input-output range. The PMC can adapt, preserve, and smartly regulate the driving of the electronic load in the absence of an external voltage source. The self-powered energy scavenging system is intended for use in circumstances where the generated power is insufficient to directly drive the load, e.g. Internet of Thing (IoT) applications. Using the suggested PMC in this work, experimental outcomes expose that the storing capacitor voltage was essentially constant at 3.3V at various inputs ranging from 850mV to 4V.