AWR1843： About junction temperature of AWR1843

Daiki Abe

Other Parts Discussed in Thread: AWR1843

部品番号： AWR1843

hello all

I calculated the internal temperature as follows:

Tj=Tc+W×0.38℃/W

Which is correct, this formula or the internal temperature sensor?

over 5 years ago

0 Vivek Dham over 5 years ago

TI__Guru 58035 points

Hello ,

The thermal resistance of 0.38C/W is applicable based on the JEDEC define 1S0P PCB and the thermal vias etc. used in the TI design. This may be different on the different system with different level of heat sinking.

Regards,

Vivek

0 Daiki Abe over 5 years ago in reply to Vivek Dham

Prodigy 70 points

hello Vivek.

As Vivek pointed out, design and system are different.

If so, is it better to refer to sensors?

0 Vivek Dham over 5 years ago in reply to Daiki Abe

TI__Guru 58035 points

Hello Daiki,

Best is to do the thermal simulations with on the sensor board to get the accurate thermal resistance on your board.

regards,

Vivek

0 Daiki Abe over 5 years ago in reply to Vivek Dham

Prodigy 70 points

hello Vivek,

Please tell me in detail how to find the thermal resistance.

Daiki,

0 Daiki Abe over 5 years ago in reply to Vivek Dham

Prodigy 70 points

Hello Vivek,

If I can't find thethermal resistance, can I use the average value of the internal temperature sensor as Tj?

0 Vivek Dham over 5 years ago in reply to Daiki Abe

TI__Guru 58035 points

Hello Daiki,

Yes the internal temperature sensors can be used to roughly estimate the Tj. You can use the average of the Rx and Tx temperature sensor readings.

Note that the accuracy of the internal temperature sensor is about 7deg.

regards,

vivek

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AWR1843： About junction temperature of AWR1843