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One question on the overtemp detect design

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chang830

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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

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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

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leotim said:
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

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you should ask the foundry about this issue
 

leotim

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chang830 said:
leotim said:
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. :oops:
Are you simulating a PCB circuit or only a chip?
 

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