AND8301 - EMC Specifications and PCB Guidelines for SMPS Devices

Introduction Electromagnetic compatibility (EMC) is a very important consideration in modern electronic design. With critical information being transmitted, received, stored and acted upon, accurate communication within and between such devices must be assured. Alongside the continuously increasing power levels and frequencies, engineers must design with EMC in mind, especially in the case of high−density layouts. Switch−mode power supplies (SMPS) are critical power management components in many automotive applications. The purpose of this document is to explain the EMC testing procedure with specific regard to SMPS applications. Universal standards as well as company standards are described in detail, along with printed circuit board (PCB) design guidelines for reference.