Rodriguez-Martinez, Daniel F.

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On chip solar energy harvesting system using substrate diode pv cell and fractional open circuit age implementation
(2018) Rodriguez-Martinez, Daniel F.; Serrano, Guillermo; College of Engineering; Ducoudray, Gladys; Palomera, Rogelio; Department of Electrical and Computer Engineering; Rios, Isabel
The technological community is highly focused in the area of solar energy harvesting. Specifically, these efforts can be observed in the design of more efficient power management systems which can extract the maximum power from the solar panel spending very low amounts of power. This work presents a power management architecture for an On-Chip solar energy harvesting system applied to low power applications. A functional Power Management Circuit with Maximum Power Point Tracking (MPPT) was designed and simulated, using a 0.13 um CMOS technology, to provide an output voltage of 1.2 V by using just one external inductor. The proposed fractional open circuit voltage MPPT circuit, along with the DC/DC converter controller, allows the system to achieve efficiencies of up to 81% even under low sun irradiation conditions.