High-Frequency Mathematical Model for Common-Mode Noise Voltage of Buck Converter

This paper proposes the high-frequency mathematical model for common-mode noise voltage of a DC–DC buck converter. The equivalent circuit considering parasitic impedance is proposed, and then path analyzed using this circuit. source generated by switching device divided into trapezoidal ringing sources mathematically modeled. For high accuracy at high-frequency, including difference between rise fall time proposed Fourier transform. modeled multiplying source. In results simulation, experiment, resonance frequency magnitude matched with less than 5% error. Through this, predicted accurately in paper.