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LM321: what's the RθJc value for LM321 ?

GW
Intellectual 2370 points
Part Number: LM321


Hi, Team

Customer prefer to know the RθJC value for the LM321MF/NOPB.

But from the datasheet, we just have the RθJA value. Could u help to provide the RθJC to us?

Thanks.

  • 0
    TI__Guru**** 166606 points

    Hello GW,

    Here is the thermal data.

    Theta JC, top 127.6 C/W
    Theta JB 32.1 C/W
    Psi JT 19.5 C/W
    Psi JB 31.5 C/W

    Note that RθJC is not very useful unless the plan is to add a heatsink on top of the LM321 ( which would not work well).

    Psi JT is useful to estimate die temperature based on top of case temperature.