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DS64BR111 / Maximum Power Dissipation(25℃) and derate

K.Yaita
Guru 29720 points
Other Parts Discussed in Thread: DS64BR111
Hi,
 
I'd like to ask about the values below of absolute maximum ratings.
・Maximum Package Power Dissipation at 25°C：xxx W
・Derate：xxx mW/°C above +25°C
Is there any value?
 
Best Regards,
Yaita
  • 0
    TI__Guru* 93670 points

    Hi Yaita,

    DS64BR111 Data sheet indicates indicates the package thermal characteristics as Theta JA with maximum junction temperature of 125 Deg C and maximum current consumption of 63mA.

    At 63mA and 3.6V supply this means the device maximum power consumption is 234mW.  Given this, the maximum operating Junction Temp = 85 Deg C(Max Operating Ambient Temp) + .234X33(Deg C/W) = 92.72 Deg C. This is well within the specified maximum 125 Deg C junction temp.

    Regards,,nasser 

  • 0 in reply to Nasser Mohammadi
    Guru 29720 points
    Hi Nasser-san,
     
    Thank you for your support.
    I understood maximum junction temp is important and there is no ABS MAX ratings of specs below.  
     
    ・Maximum Package Power Dissipation at 25°C：xxx W
    ・Derate：xxx mW/°C above +25°C
     
    Best Regards,
    Yaita