Types of EMI filters for automotive use include: Common-mode EMI filters These are employed in automotive applications like USB, CAN, CAN-FD, 100Base-T1, 1000Base-T1, LVDS, and SerDes.

This Power Tip article will explore how these types of parasitics can create an unexpected EMI filter resonance in a gallium nitride (GaN)-based onboard charger (OBC) for an electric vehicle (EV).