The full part number is S34ML04G100BHI003
We generally do not provide the Theta JB and Theta JC parameters in the datasheet. Instead we provide a parameter called Psi Jt which provides a better estimate for the thermal parameters.
Kindly refer to the app note below for more information.
The Psi Jt parameter for the part will be equal to
Psi Jt = 10.5 C/W
Thanks for your information Pradipta,
So, do we assume there is no heat dissipation through board?
Joo-Han Kim, Ph.D.
Senior Mechanical Engineer
T +1 256 382 8262
12090 Memorial Parkway, SW
Huntsville, AL 35803
image001.png 9.6 K
There will be heat dissipation through the board. You can use Theta JB = 7.3 C/W for all your calculations.
Great! Thanks. Just my last question. What is the maximum junction temperature?
The maximum operating junction temperature, can be calculated by using the below formula.
Tj = Pd*Theta Ja + Ambient Temperature
Pd is power dissipation.
Pd (max) = Vdd max * Idd max = 3.6*30 = 108mW
Using Theta Ja as 39 C/W and max ambient temperature
Tj can be calculated to be 89.212 C