• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 130 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCA9534A: Tj (max) and Max. power consumption Check

YULUNG HSU
Prodigy 60 points
Part Number: TCA9534A

Tool/software:

Hi Sir,

We found Tj (max) only 100oC in the datasheet, is it correct? Normally the Silicon IC should be 125oC  degree.

If the Tj(max) is only 100oC , what's the max. power consumption for TCA9534A.

We would like to clarify these parameters to calculate Tc.

Thanks,

Ocean

  • +1
    TI__Mastermind 47278 points

    Hi Ocean,

    Tj(max) is spec'ed at 100C abs max. Yes this is correct. 

    Max power consumption can be calculated using the following formula. 

    (Tj(max) - TA(max)) / RthetaJA = Pt(max)

    I think this would be the way I would calculate the total power consumption. 

    (100C - 85C) / 122 C/W = 0.122 W = 122mW of power. 

    Regards,

    Tyler