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DP83822, is there any limitation with pulse transformer

Shinichi Inoue
Guru 21646 points

Dear Specialists,

My customer is considering another PHY to DP83822 and POE.

He wants to use the same transformer listed below.

Are these possible to use and any concern?

(1)Pulse Transformer with coil choke(all in one) 

supplier：TAIMAG

model ：HC-027

(2)Pulse Transformer and coil choke (separately)

Pulse Transformer

supplier ：TDK

 model ：ALT4532M-201-T001

coil choke ：TDK

 model ： ACM2520-102-2P

I appreciate your great help.

Best regards,

Shinichi

  • 0
    TI__Mastermind 23675 points
    Hi Shinichi,

    Not all of these are transformers... the last one is just a choke.
    I see no mention of POE support in any of the component's datasheets.
    Please contact those manufacturers to see if POE is supported. They might not be though because magnetics that support POE will need different construction to prevent the inductor from saturating.

    Kind regards,
    Ross