This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM25149-Q1: EMI data

Part Number: LM25149-Q1
Other Parts Discussed in Thread: LM25149, LM25148

Hi team,

Could you please give me CISPR 25 test result of LM25149-Q1 with and without AEF?

I found conducted emission data in the datasheet, but I would like to see Radiated Emission data too. 

Is Figure 9-17 CISPR 25 Class 5 Conducted EMI with AEF or without AEF?

It looks there is some difference between LM25149 and LM25148 plot, I thought this is AEF enabled. 


  • Hi Shinji,

    Actually, the EMI on the frontpages in LM25148 is with AEF OFF, and LM25149 is AEF ON.

    I sent you the raw images.

    Radiated EMI is more of a system level test.

    An open-board controller may have alot of radiated noise, and it actually ends up better in an enclosure. 

    We usually dont publish radiated with a controller.