Layout optimization to reduce EMI of a switched mode power supply

This paper shows how to reach the "best" possible layout, satisfying simultaneously the minimal surface, all technological constraints due to the geometry of the components, and a reduced EMC signature. For this purpose, all components must be modeled in the high frequency domain, including interconnects. An interesting harmonic approach is used to predict EMI spectrum, which avoids the prohibitive computation times induced by temporal simulation. Therefore, optimization results are nearly instantaneous using a simple Mathcad/spl reg/ sheet. This method is illustrated in the case of a 14 V-42 V boost converter, realized on IMS.