EMC Methodology to Optimize Application of Electronic Component Multisourcing

This paper introduces a way to reduce product EMC requalification when new sources are introduced. The strategy is to shift the qualification from the product to the component itself considering that if components are equivalent, the products behavior will also be the same. For each component category (capacitor, inductor, diodes, IC …), the relevant characteristics are identified to be considered for the comparison which can impact the EMC performance of a product (Z(f), I(V) …). Criteria are then defined, based on technology, geometric parameters, tolerances and measurement uncertainties. An application on X7R capacitor is given to illustrate this methodology. Limits of the method and application on complex component will then be introduced.