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DS80PCI402 / absolute maximum ratings

K.Yaita
Guru 29720 points
Other Parts Discussed in Thread: DS80PCI402, DS64BR401
Hi,
 
I'd like to ask about Absolute Maximum Ratings of DS80PCI402.

I found rating of "Derate" but I can't catch the meaning of this.
Is "Derate" related to acceptable power dissipation?
I'm sorry if it is basic question.
 
Best Regards,
Yaita
  • 0
    Guru 29720 points
    I'm sorry for lack of talk.
    I want to know the value of "Maximum Power Dissipation at 25℃"of DS80PCI402.
    There is no description of the value.
    On the other hand, I found the value of DS64BR401 and it is 4.21W.
     
    I think the value of DS80PCI402 is also 4.21W because DS80PCI402 and DS64BR401 is the same package and thermal resistance.
    Is my understanding correct?
    I want your support.
     
    Best Regards,
    Yaita 
  • 0 in reply to K.Yaita
    Guru 29720 points
    Could you give me your comment please?
     
    Best Regards,
    Yaita
  • 0 in reply to K.Yaita
    TI__Mastermind 43795 points

    Kensuke-san,

    The maximum power dissipation of the DS80PCI402 device is 900mW.  This parameter is 100% ATE production tested and guaranteed in the Electrical Table. 

    The package for both devices is the same and it is possible for this package to handle more power than the DS80PCI402 circuit actually consumes.  Here is the thermal calculation for the DS80PCI402 device running at an ambient temperature of 85C with no airflow.

    Theta JA = 19.1 degrees C / Watt (juntion to ambient temperature delta per watt)

    Specified Ambient temperature operating range is -40 to +85 degrees C

    85C + 19.1 C/Watt * 0.9 Watt = 85C + 17.19C = 102.19C junction temperature

    This junction temperature is below the maximum specified junction temperature of 125C.

    In practical terms, the package can dissipate much more power than the DS80PCI402 consumes and still keep the silicon below the maximum junction temperature specification.

    Best Regards,

    Lee

  • 0 in reply to Lee Sledjeski
    Guru 29720 points
    Hi Lee-san,
     
    Thank you for your reply.
    Is "Maximum Package Power Dissipation at 25℃" of DS80PCI402 also 4.21W?
     
    Best Regards,
    Yaita
  • 0 in reply to K.Yaita
    TI__Mastermind 43795 points

    Yes the maximum package dissipation is the same for both devices.

    Lee

  • 0 in reply to Lee Sledjeski
    Guru 29720 points
    Lee-san,
     
    Thank you for your support.
     
    Best Regards,
    Yaita