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Forum Index : Microcontroller and PC projects : PIC32 is hot.

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9585
Posted: 10:39pm 10 Jan 2014
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Hi all.

How hot is too hot?

When idle, the PIC32 is about 27'c
When I feed it processor intensive tasks at 100% duty-cycle, the heat rises to about 50'c at the plastic case of the IC.

That's pretty hot, and is hot to the touch.(the chip is)

Heat is a killer of electronics, so is that still normal?

Perhaps one of those little stick-on heatsinks would be a good idea...Edited by Grogster 2014-01-12
Smoke makes things work. When the smoke gets out, it stops!
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9585
Posted: 10:51pm 10 Jan 2014
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Perhaps I am over-reacting?

When I run something like COLOUR-1.BAS for several minutes, I discover that the IC heat is about the same at roughly 40'c

This time I used a laser thermometer, last time I used my finger.

I might be wrong on this one - fingers have thermal lag...

EDIT: Bloody Vodka is screwing with my ability to be logical tonight.

You can probably ignore this thread....
Edited by Grogster 2014-01-12
Smoke makes things work. When the smoke gets out, it stops!
 
Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3281
Posted: 02:00am 11 Jan 2014
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There is no difference between the processor waiting for input and actually doing something. It keeps running at the same speed and drawing the same power and therefore generating the same amount of heat.

Normally the PIC32 runs a little warm but definitely not burning hot. You can make it run a bit hotter if you are sinking or sourcing a lot of current through the I/O pins.

Watch out for that Vodka...

Geoff
Geoff Graham - http://geoffg.net
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9585
Posted: 01:26pm 11 Jan 2014
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Beer is good, Vodka is bad....

Smoke makes things work. When the smoke gets out, it stops!
 
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