Press release
Industry's first DC/DC controllers with an integrated active EMI filter enable engineers to achieve the smallest low-EMI power designs
Designers can optimize the size and EMI of the power supply in industrial and automotive electronics with new buck controllers from TI DALLAS, April 7, 2021
About this update from Texas Instruments Incorporated
[{"type":"text","content":"Designers can optimize the size and EMI of the power supply in industrial and automotive electronics with new buck controllers from TI\n\n\nDALLAS, April 7, 2021 /PRNewswire/ -- Texas Instruments (TI) (Nasdaq: TXN) today introduced a new family of synchronous DC/DC buck controllers that enable engineers to shrink the size of the power-supply solution and lower its electromagnetic interference (EMI). Featuring an integrated active EMI filter (AEF) and dual-random spread-spectrum (DRSS) technology, the LM25149-Q1 and LM25149 enable engineers to cut the area of the external EMI filter in half, lower the conducted EMI of the power design by as much as 55 dBµV across multiple frequency bands, or achieve a combination of reduced filter size and low EMI. For more information, see www.ti.com/LM25149-Q1-pr and www.ti.com/LM25149-pr.\nReducing EMI in the power supply is a growing design challenge, especially as electronic content increases in advanced driver assistance systems (ADAS), automotive infotainment and cluster, building automation, and aerospace and defense designs. A traditional way to ensure that a design meets conducted EMI specifications involves increasing the size of the external passive EMI filter, which in turn increases the overall power supply solution size. By integrating the AEF, the LM25149-Q1 and LM25149 buck controllers enable engineers to meet EMI standards while increasing their design's power density. To learn how an integrated AEF works, read the technical article, \"How to reduce EMI and shrink power-supply size with an integrated active EMI filter.\"\nReduce conducted EMI across the entire CISPR 25 Class 5 frequency spectrum \nThe most stringent industry requirements for low-EMI designs are Comité International Spécial des Perturbations Radioélectriques (CISPR) 25 Class 5 automotive EMI specifications. The LM25149-Q1 and LM25149 buck controllers help engineers meet those requirements by mitigating conducted EMI across multiple frequency bands. The integrated AEF helps detect and reduce conducted EMI in the low-frequency band of 150 kHz to 10 MHz, enabling engineers to attenuate EMI by up to 50 dBµV at a switching frequency of 440 kHz, relative to a design with the AEF disabled, or as much as 20 dBµV when compared to a design with a typical passive filter. In both design scenarios, the DRSS technology helps m...