EMI Reduction in Automotive Power Devices: Design Strategies for Compliance, Safety, and Performance

EMI Reduction in Automotive Power Devices: Design Strategies for Compliance, Safety, and Performance 
by Giusy Gambino, Yasmin Abigail Chiarenza, and Sebastiano Grasso
STMicroelectronics, Catania, Italy

Abstract
Electromagnetic compatibility (EMC) refers to the ability of a device, piece of equipment, or system to operate as intended without degradation or malfunction in its electromagnetic environment. In this setting, electromagnetic interference (EMI) stands out as a central challenge. EMI mitigation is especially critical in modern automotive power electronics, where increasing electrification, connectivity, and software-defined control require devices that are not only efficient and protected, but also electromagnetically robust. Conducted and radiated emissions must be carefully controlled without compromising switching performance, diagnostic accuracy, or functional safety.

This paper discusses key EMI sources in automotive power devices and presents design strategies for compliance and system robustness. Particular attention is given to intelligent power switches and smart electronic fuses, whose multifunctional nature makes them especially sensitive to electromagnetic disturbances....