MAX3232-EP: thermal resistance

Qi Liu

Expert 5735 points

Part Number: MAX3232-EP

Hi, support team

My customer has the questions as follow:

Could you provide Junction to Case thermal resistance and Junction to Board thermal resistance of MAX3232MDBREP?

Thanks so much.

Best regards,
Yuki

over 3 years ago

0 Eric Schott1 over 3 years ago

TI__Guru 53555 points

Hi Yuki,

I have requested this information from our modeling team and will get back to you once the request is complete. This may take some time due to the US holiday. Please expect our response next week.

Regards,
Eric Schott

0 Eric Hackett over 3 years ago in reply to Eric Schott1

TI__Guru 74262 points

Yuki,

Just an update from our side, this information is still being simulated. As Eric Schott said, this may take until the end of this week due to the Thanksgiving holiday.

Regards,

Eric Hackett

0 Eric Hackett over 3 years ago in reply to Eric Hackett

TI__Guru 74262 points

Yuki,

Result- Theta JA-High K (junction-to-ambient)	97.8
Result-Theta JC, top (junction-to-case)	43.1
Result-Theta JB (junction-to-board)	49.5
Result- Psi JT (junction-to-case (top))	8.0
Result- Psi JB (junction-to-case (bottom))	48.7

Please let us know if you have any other questions.

Regards,

Eric Hackett

0 Nitheesh shenoy over 3 years ago

Prodigy 60 points

what is the difference between Psi & theta? which value should I use for the simulation?

0 Eric Hackett over 3 years ago in reply to Nitheesh shenoy

TI__Guru 74262 points

Nitheesh,

Theta is thermal resistance determined by a JEDEC specified test board, and Psi estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining θJA, using a procedure described in JESD51-2a. So, both are relative the JEDEC thermal specification, and both are in units of C/W. Typically I've seen customers use the theta parameter.

Regards,

Eric Hackett

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MAX3232-EP: thermal resistance