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LM5002: Questionn about te distance between RT resister and LM5002

Voyager Liao
Prodigy 170 points
Part Number: LM5002

Hi Sir

Is there any concern that if I place the RT resistor far away from the chip?

As you can see from below picture

The resistor is vey close to the white glue which is used to  fixed the EC-CAP.

 

 

Can I just replacement  the resistor as below?

Thank you very much

  • 0
    TI__Mastermind 49951 points

    Hi,

    there is no general distance which could be given here.

    There is of course the recommendation: as close as possible.

    Finally only a test on the end application can give you a sure answer but keep in mind the larger the distance and the bigger the current loop build by the routing to the resistor the bigger the potential disturbance which can be injected (basically the current loop builds an antenna).

    So distance, switching frequency, load current, Vout/Vin ratio, board layout, ..... all plays in influence on that.

    Best regards,

     Stefan 

  • +1 in reply to Stefan Schauer
    TI__Mastermind 49951 points

    Hi,

    I haven’t heard from you for some days, so I’m assuming you were able to resolve your issue. If this is the case, please click the "This did resolve my issue" button. 

    If the issue still exist please describe the current status of your issue and any additional details you may have to assist us in helping to solve your issues.

    Regards,

     Stefan

  • 0 in reply to Stefan Schauer
    Prodigy 170 points

    Hi Sirs

    Thanks for your reply support very much.