DC-DC Buck Converter Based on Arduino Uno Sliding Mode Controller

The DC-DC non-isolated Buck converter is based on a sliding-mode controller (BC-SMC) accomplished with an Arduino Uno R3 development board. The converter aims to supply and charge portable devices (PDs) with variable DC voltage requirements in a range of 2.5 to 24 V and a power up to 300 W. The input is connected to a DC power supply of 30 V and 11 A. BC-SMC ensures the output voltage setup and control, it also limits the current that is supplied to the PD. The BC-SMC can switch between current control, when the PD charging process is at the beginning stage, or the voltage control at the end of charge or when simply supplying the PD. After testing the BC-SMC, it shows good performance, supplying up to 50 A for 5 V or lower voltage requirements, or more than 10 A at the 24 V, the highest voltage limit. The BC-SMC was developed to be included in a more complex equipment, which is targeted to connect to any electrical DC energy source, in a range of 1.5 to 300 V, and supply PDs with electrical requirements between: 2.5-30V and 0-50 A.