An Indoor Photovoltaic Energy Harvester Using Time-Based MPPT and On-Chip Photovoltaic Cell
Journal
IEEE Transactions on Circuits and Systems II: Express Briefs
Journal Volume
67
Journal Issue
11
Pages
2432-2436
Date Issued
2020
Author(s)
Chang M.-C
Abstract
An indoor photovoltaic (PV) energy harvester using a time-based maximum power point tracking (TBMPPT) circuit and an on-chip PV cell is presented. The TBMPPT circuit selects one of three switched-capacitor DC-DC converters and adjusts the switching frequency to achieve the maximum power. This TBMPPT circuit can also track the light intensity variations. When the TBMPPT circuit is locked, a duty-cycle control technique is used to lower the power. This indoor PV energy harvester is realized in a 0.18 CMOS process. Its total active area is 2.89mm2 wherein the area of the PV cell is 1.436mm2. The measured peak power conversion efficiency (PCE) is 68.3%. This energy harvester can cover the wide input power range of 5 {W} - 500 {W} and maintain the PCE>50% over the input power range of 10 {W} - 500 {W}. ? 2004-2012 IEEE.
Subjects
DC-DC converter energy harvester; maximum power point tracking; Photovoltaic; power conversion efficiency; switched-capacitor; time-based
SDGs
Other Subjects
Capacitors; Clocks; DC-DC converters; Electric impedance; Energy harvesting; Maximum power point trackers; Photoelectrochemical cells; Photovoltaic cells; Switches; Duty cycle control; Energy Harvester; Light intensity; Maximum power; Maximum Power Point Tracking; Photovoltaic energy; Photovoltaic systems; Switched-capacitor dc-dc converter; Switching frequency
Type
journal article