Function of Ethernet Magnetics

Function of Ethernet Magnetics


 




• Electrical isolation per IEEE 802.3




• Transfer of Ethernet signals without distortion




• EMI suppression




EMI properties are directly related to CM properties




Relevant information never found in data sheets




Significantly affected by parasitic elements in the construction




Hand-wound ¨C affects CM performance and consistency




Physical layout in the package extremely important




Limited package size and HV requirement limit available options




Extremely price sensitive business




 




Ingredients






• Pulse (Isolation) Transformers




• Common Mode Chokes




• Autotransformers




• Capacitors




• Resistors




• Package/Mechanical (+ connector pins and leads in ICMs)




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