Buck Controller with Integrated Active EMI Filter

摘要

Equipped with an integrated active EMI filter (AEF) and DRSS (dual random spread spectrum) technology, the building blocks LM25149-Q1 and LM25149 offer the possibilities of halving the surface area of the external EMI filter, reducing the conductor-related EMI of the power supply design over a number of frequency bands by up to 55 dBuV, and selecting a combination of reduced filter size and low EMI level.