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Radiated Emission problem with ADuM5402

Question asked by rtiwari@cranecpe.com on Nov 7, 2017
Latest reply on Nov 14, 2017 by rtiwari@cranecpe.com

Hi guys ,

I am using  ADuM5402 digital isolators with integrated DC-DC converter. Switching frequency of internal converter is 180 MHZ. It creating problem in Radiated Emission test So i have changed my PCB layout as per recommendation in AN-0971 (Recommendations for Control of Radiated Emissions with isoPower Devices by Mark Cantrell) .

Test again in EMC lab and Still problem same but reduced some radiation dB level. Please suggest solution for RE test pass.

I also want to experiment with alternate part no of ADuM5402 with low switching frequency. but i am not able to found the part. please suggest the compatible alternate part with less switching frequency. 

Thank you in advance.

Regards,

Rekha 

 

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