One question on the overtemp detect design

[chang830]

Hi,
We need design an overtem detectect circuit on my chip. The temperature alarm point is 160'C. But I found the spice model can only support the junctiuon temperature -40'C----125'C. Because my overtemp block will trigger at 160'C, i have to design/simulate the cicruit at 160'C. I wonder, the simulation is believable?

Why is the descranpancy be up to?

Thanks

 

[leotim]

I think that the ambient temperature is 160°C, so the junction temperature may be some lower than this. Do you want to control somewhere temperature?

 

[chang830]

I think that the ambient temperature is 160°C, so the junction temperature may be some lower than this. Do you want to control somewhere temperature?

Hello, leotim,
I think the junction temperature should be higher than that of ambient temperature.

The overtemp block is to detect the juction temperature. That's the trouble here.

 

[pfd001]

you should ask the foundry about this issue

 

[leotim]

I think that the ambient temperature is 160°C, so the junction temperature may be some lower than this. Do you want to control somewhere temperature?

Hello, leotim,
I think the junction temperature should be higher than that of ambient temperature.

The overtemp block is to detect the juction temperature. That's the trouble here.

You are right.
Are you simulating a PCB circuit or only a chip?