TPS51367 Tj max; Higher ambient Temp

SimonF

Other Parts Discussed in Thread: TPS51367

Hi Team,

what is the maximum recommended Tjunction for TPS51367? The datasheet only specifies ambient temp. Is it possible to use TPS51367 at higher ambient temps (95°C maybe 100°C) if the junction temperature is within the limits?

Best Regards,

over 8 years ago

0 JohnTucker over 8 years ago

TI__Guru**** 191445 points

I am reasonably certain that maximum operating Tj is 125 C as thermal shut down is 140 C. So theoretically you can operate at higher ambient current if you derate the current.

0 Yuchang Zhang over 8 years ago

TI__Mastermind 18510 points

Hi SF,

There is TJ max value, which is 150, in ABSOLUTE MAXIMUM RATINGS table in DS. But as Tucker said thermal shutdown is 140, I think you can add some derating based on 140 for normal work, and also there is θJA/JC in THERMAL INFORMATION table, you can evaluate the chip max Power by these data.

Frank

0 JohnTucker over 8 years ago in reply to Yuchang Zhang

TI__Guru**** 191445 points

That thermal shutdown is 140 C typical. I would not design to operate up to 140 C. Actual shutdown my be lower than 140 C. Based on my experience, 140 C thermal shutdown means 125 C max operating junction temperature. You will not damage the device below 150 C. however.

0 Yuchang Zhang over 8 years ago in reply to JohnTucker

TI__Mastermind 18510 points

Yes, Tucker, Thanks for your explaination, I agree with you , I mean customer can make derating based on 140C to get the spec., maybe 80%*140 or 90%140, I have no detailed experience value, certainly, I agree with 125C as well. and 150C is exactly absolute spec.

Yuchang

0 JohnTucker over 8 years ago in reply to Yuchang Zhang

TI__Guru**** 191445 points

Please do not allow the junction temperature to approach the thermal shut down. Do not let the junction temperature exceed 125 C.

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TPS51367 Tj max; Higher ambient Temp