EMI reduction techniques for integrated DC-DC power converters: an analysis of spread spectrum modulation

The rapid advancements in electronic engineering have introduced numerous features in the automotive field, but they have also led to an increase in electromagnetic compatibility (EMC) issues. The growing number of electrical systems and semiconductor components has resulted in a corresponding rise in electromagnetic interference (EMI) problems. EMI caused by a device can lead to unintended changes in automotive system operations, affecting the surroundings. Therefore, chip designers must consider these interactions when developing new systems. This thesis focuses on the EMC problems related to DC-DC converters and explores possible countermeasures. In particular, it examines the effectiveness of Spread Spectrum modulation and its practical implementations. The first part of the thesis presents a detailed analysis of various modulation profiles to determine which one yields the best results, specifically the greatest attenuation of frequency components. Finally, a frequency generator was developed and tested with the applied spread spectrum modulation.