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Title: Digitally-controlled H-bridge DC-DC converter for micropower PV energy harvesting system
Authors: Bui, Anh Khoa
Xiao, Zhekai
Siek, Liter
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2017
Source: Bui, A. K., Xiao, Z. & Siek, L. (2017). Digitally-controlled H-bridge DC-DC converter for micropower PV energy harvesting system. 2016 International Symposium on Integrated Circuits (ISIC), 1-4.
Project: 11235100003.
Abstract: This paper presents a micro-power photovoltaic (PV) harvesting system. A H-bridge configuration DC-DC converter is designed to harvest PV energy and deliver energy to applications of Internet of Thing (IOT). The main converter consists of a single inductor with two inputs and two outputs. It regulates a constant 1V output voltage for several applications such as sensors and signal transmitters. The surplus energy is stored in a rechargeable battery. The battery also serves as a secondary input source to provide energy to the output load in heavy-load condition. Due to the limited energy of the system, the power consumption of the power system is optimized by several techniques. A perturb-and-observe maximum power point tracker (MPPT) is implemented to maximize the power extracted from the PV harvester. Pulse-width modulation (PWM) and pulse-frequency modulation (PFM) are used to regulate the output voltage. The controller is designed mainly in digital and free of power-hungry circuits. The proposed converter occupies an area of 1.44mm2. The estimated peak power efficiency is 84% while driving 3-10μA load current.
ISBN: 9781467390194
DOI: 10.1109/ISICIR.2016.7829681
Rights: © 2016 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Conference Papers

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