WEBENCH® Tools/TPS82140: "Design update failed. Junction temperature is too high"

chuckm

Prodigy 120 points

Part Number: TPS82140

Tool/software: WEBENCH® Design Tools

Webench faithfully simulates a 9-13V input / 3.3V 1@A output using the TPS82140

If the output current spec changes to 3.3V @0.5A, I receive the error"

"Design update failed. Junction temperature is too high"

Does the Webench simulator has a problem with lighter loads using the TPS82140?

It would seem the device itself would perform well at the reduced current ... Tj actually lower @0.5A than @- efficiency might be a tad lower 84/85%

So is this an issue with using the TPS82140 model in Webench?

Would TINA have a similar problem the TPS82140 model

Thanks

Chuck

over 7 years ago

0 Amod Vaze over 7 years ago

TI__Mastermind 28720 points

Hi Chuck,

I am able to reproduce your issue as well. We will debug and confirm this issue but this looks like a bug in the model. You can use TINA exported schematic from the 1A design from WEBENCH to simulate the transient behavior of the IC at 0.5A and confirm if the operation is as expected but TINA will not provide information on efficiency or junction temperature of the IC.

Regards,
Amod

0 Umayal Ramanathan over 7 years ago in reply to Amod Vaze

TI__Expert 5920 points

Hi Chuck,

This issue is resolved. Fix shall be available on TI.com by 24th May.Shall update you once the fix is on TI.com.

Thanks and Regards,
Umayal

0 Umayal Ramanathan over 7 years ago in reply to Umayal Ramanathan

TI__Expert 5920 points

Hi Chuck,

Fix is available on ti.com.Thanks for your patience.

Regards,
Umayal

Simulation, hardware & system design tools

Simulation, hardware & system design tools forum

WEBENCH® Tools/TPS82140: "Design update failed. Junction temperature is too high"