Abstract: To charge a mobile phone from the DC‐DC converter built, a regulator would need to be used to supply a constant voltage to the phone itself. To supplying 5V to the mobile Phone would be sufficient. The output of the built buck converter should be between 5V and 10 V. These voltages would be low enough to be input to most 5V regulators. It was decided to use a simple 5V linear regulator to perform the task.
This research involves designing a mobile phone charging system and a LED lamp which is powered via a solar panel and that is capable of charging multiple mobile batteries simultaneously. The project also requires research into the different solar panels available for the small scale system being designed, as well as into larger solar panels that may be implemented into a building’s design. Investigations will also have to be made into how the overall system would change if these larger solar panels were implemented. The small scale test system will also be able to display information visually to the user of the system regarding the systems overall capacity to charge at any given time and will also include power management functions.
The goal of this project is to create a multiple output cell phone charger. The cell phone charger is essentially a DC-DC converter. A commercial charge controller IC was sourced that met with the specifications of the project. This is the design method that the final system is based on. It is comprised of a solar panel whose voltage is regulated by a DC‐DC converter. The power management of the solar panel comes in the form of maximum power point tracking (MPPT), which will be discussed in greater detail further on. For this design it entails using an outside controller to control the duty cycle of the DC‐DC converter. It was decided that the DC-DC converter would have to be built in the lab, as it was difficult to find a suitable commercial converter that could be controlled in this way. The output of the converter is then applied to the back‐up battery and the load.
Finally, some implementations of solar charger for portable devices are analyzed, showing drawbacks and benefits for each architecture and a complete integrated solution is proposed.
Keyword: Solar Panel, Mobile Charger, renewable energy, solar energy.
Title: Solar Panel Based Mobile Charger and Small Led Lamp
Author: Md. Musabbir Hossain
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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