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Hello,
Can you provide thermal resistance of Junction to Board for S34ML01G1?
Thanks,
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The full part number is S34ML04G100BHI003
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Hi,
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
https://www.cypress.com/file/210756/download
Thanks,
Pradipta.
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Thanks for your information Pradipta,
So, do we assume there is no heat dissipation through board?
Joo-Han
Joo-Han Kim, Ph.D.
Senior Mechanical Engineer
Abaco Systems
T +1 256 382 8262
Email: joo.kim@abaco.com<mailto:joo.kim@abaco.com>
12090 Memorial Parkway, SW
Huntsville, AL 35803
USA
www.abaco.com<http://www.abaco.com>
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Hi Kim,
There will be heat dissipation through the board. You can use Theta JB = 7.3 C/W for all your calculations.
Thanks,
Pradipta
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Great! Thanks. Just my last question. What is the maximum junction temperature?
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Hi Kim,
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
Thanks,
Pradipta.