• State TI Thinks Resolved
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 47 subscribers
  • Views 26 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

LM2903: Theta JC value

JP
Expert 3591 points
Part Number: LM2903

Tool/software:

Hi Team, 

I'm working with an Engineer that needs the Theta JC value for the LM2903 for their thermal analysis. 

The datasheet only contains the Theta JA values. Any help here is appreciated. 

Thanks, 

JP 

  • 0
    TI__Guru**** 154216 points

    Hello JP,

    JP said:
    Engineer that needs the Theta JC value for the LM2903 for their thermal analysis. 

    No I don't think they need that. JC is only useful for the 1 in a million people that want to glue a heat sink on top of a LM2903.

    Why, because very little of the heat actually flows out through the top of the package.

    Perhaps they need this instead: ψJT Junction-to-top characterization parameter

    Canned answer below.

    • Thermal case Tjc, not useful unless heatsink used, Psi JT is the key parameter

    –SPRA953C–December 2003–Revised April 2016

    –Semiconductor and IC Package Thermal Metrics

    –https://www.ti.com/lit/pdf/spra953