Abstract
A single inductor dual input dual output (SIDIDO) DC-DC converter is proposed for solar energy harvesting applications. The converter supports hybrid power supplies from both the photovoltaic (PV) cells and the rechargeable battery. Apart from the conventional role of providing a regulated output voltage to power the load, the proposed DC-DC converter also clamps the input voltage from the PV cells to the maximum power point (MPP) value so as to extract the maximum power from the PV cells. At the same time, one of the dual outputs is used to charge up a rechargeable battery. When the PV cells output power is insufficient for the load, the converter will schedule the PV cells and the battery to power the load together. When the PV cells output power is larger than the load, the surplus PV cells energy is used to charge the rechargeable battery through the converter's second output. Extensive simulations were carried out to verify the operation and demonstrate the power transfer efficiency of the proposed DC-DC converter.
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