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TPS2376: TPS2376 ILIM resistor value

Szabolcs Jakits
Prodigy 100 points
Part Number: TPS2376

Dear Sir or Madam,

I would like to ask about the ILIM resistor functionality.
How does it affect the operation if the value is around 100Ohm due to a manufacturing defect?
Does it causes a short circuit on the power line or just blocking the functionality?

Thank you in advance for your help.

Best regards,

Szabolcs

  • 0
    TI__Mastermind 21320 points

    Hello Szabolcs,

    The ILIM resistor sets the current limit during the In-rush phase. The range is 62.5K to 500K. 

    A 100ohm resistor would effectively not limit the in-rush, causing a current spike. The PSE may shutoff power if the in-rush current limit is too high - it might depend on the PSE. But either way there would be a big current spike. 

    From Equation 1 in the datasheet: Ilim = 2500/Rlim = 2.5A - which would break the internal Pass FET. 

    If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

     

    Regards, 

     

    Michael P.

    Applications Engineer

    Texas Instruments