Hi,
I need below information for TCA6424ARGJR to our qualification team approval.
- Junction Temperature Tj
- Thermal Resistance RθJC
Regards,
TS
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Hello Francis,
thanks for your kind answer.
I found below equation from datasheet.
so, I understood about thermal data of TCA6424ARGJR as below.
- Max TA : 85c
- Calculated Max Tj = Max TA * (θJA*PD)
- Calculated Max Tj < Max TA
Am I right?
Also, I need one more information - Tc.
Would you share the Tc(Case Temperature) of TCA6424A ?
-TS
Hello Francis,
As for the thermal data of TCA6424ARGJR, we finally need below parameters.
Please check again the values.
- Tcase max
- Tjunction max
- RθJC
- PsiJT
I feel sorry but please understand for the duplicated questions.
thanks,
TS
Hello TS,
I already showed you the theta and phi parameters in the previous post in a table. Tcase max isn't something we specify because this is a measured quantity. Tjunction has to be extrapolated from the thermal resistances, the power dissipated, and the temperature of either air or case based on what you measure. It must be calculated based on use case. I am sorry, but I don't really understand what you need clarification with?
Here is a link to an app note specifying IC thermal metrics and how to use them:
http://www.ti.com/lit/an/spra953c/spra953c.pdf
http://www.ti.com/lit/an/slrr012/slrr012.pdf
http://www.ti.com/lit/an/snva183b/snva183b.pdf
Let me know what I can do to help clarify.
-Francis Houde