Noise Analysis in Voltage Mode Controlled DC-DC Converters

This paper presents a strategy for performing noise analyses in a boost converter with Voltage Mode Control (VMC). The proposed analysis is particularly powerful when each of the power regulator transfer functions is known. The approach is demonstrated by injecting a noise source, treated as a single sinusoidal tone, in two scenarios: within and beyond the first Nyquist band. The effectiveness of the model is verified by comparing the calculated gains through FFT (Fast Fourier Transform) of the output voltage with the ones computed from AC analysis.