INA241A: Maximum Allowable Pressure when using Thermal Interface Material

Adrian Keil

Part Number: INA241A

Tool/software:

Hello,

for a high-power converter project we are using your INA241 amplifier, specifically the INA241A1IDDFR in SOT23-8 package. The amplifier is placed next to the power transistors which need cooling. Therefore, we want to place a thermal pad on top of the transistors which would extend over the INA241 as well. What is the maximum allowable pressure component can tolerate?

Best regards
Adrian

6 months ago

0 Javier Contreras4 6 months ago

TI__Mastermind 32310 points

Adrian,

Let me talk so someone that is an expert on this. I will get back to you.

Regards,

Javier

0 Javier Contreras4 6 months ago in reply to Javier Contreras4

TI__Mastermind 32310 points

Hello Adrian,

I was told they normally can handle about 500N of force for this package type. Some device are more suspectable to mechanical stresses depending on the design and the impact on specific component in the IC. It would be best to look at the output in your condition and verify the output does not change before and after stress is applied.

Regards,

Javier

0 Adrian Keil 6 months ago in reply to Javier Contreras4

Prodigy 10 points

Hello Javier,

Thank you very much for the reply. I am just very suprised that it is that much. 500N on an SOT23-8 would mean a pressure of 14500 PSI. That seems like an isane amount... Maybe 500mN? That would be 14 PSI which seems much more reasonable.

Best regards
Adrian

+1 Javier Contreras4 6 months ago in reply to Adrian Keil

TI__Mastermind 32310 points

Hello Adrian,

I am sorry I had got the incorrect information. I confirmed with our packaging team and we do not have this information as it is not tested. My initial response was incorrect as it was taken from a QFN package and larger surface area.

Regards,

Javier

0 Adrian Keil 6 months ago in reply to Javier Contreras4

Prodigy 10 points

Hello Javier,

alright, thank you for the reply! I will make a cutout in the heatspreader to be safe...

Best regards
Adrian

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INA241A: Maximum Allowable Pressure when using Thermal Interface Material