Buck Converter for Noise-Isolating Power Supplies

Buck converter is a circuit in which the output voltage is smaller than the input voltage, and in this sense is also called a step-down converter. Recently, due to the development of high-density integrated circuit technology, small and light electric and electronic devices, industrial equipment causes fatal losses even with very small power differences. Therefore, a stable power supply is needed. In this paper, we propose a circuit that uses a filter for safe power supply to the input and output stages of a non-isolated buck converter. We experimentally saw the results of the noise isolation.