Single-output-sensor on-chip integrated MPPT for PV solar system power management

This paper presents the design and HSPICE simulation results of an on-chip integrated Single-OutputSensor Maximum Power Point Tracking (SOS MPPT) PV solar system architecture. The cell-level on-chip integrated analog SOS MPPT circuit is designed to track the maximum power point of PV system under different conditions including changes in irradiation levels. The MPPT circuit is implemented using 0.35μm CMOS technology. Results are presented for a two PV solar cells connected in series and exposed to different solar irradiation levels, which show the ability of each cell to extract its MPP. The proposed cell-level integrated system is a step forward to overcome the effects of mismatches and/or partial shading phenomena in PV solar systems which affects efficiency. In addition, the system cost is reduced as a result of using one MPPT controller with only one sensor for N-cell PV solar system with cell-level MPPT control.