Interference of Spread-Spectrum Switching-Mode Power Converters and Low-Frequency Digital Lines

The interference between switching mode power converters and wireline digital communications is addressed in this paper and the impact on communication errors of different Spread Spectrum (SS) modulation techniques, which are commonly used in power convertors to comply with EMC regulations, is experimentally investigated in a particular case. Experimental results do not highlight significant differences in terms of communication error rate induced in the victim data line between power converters featuring conventional and SS pulse width modulations.