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TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 11:12
by PaulJ_2.0
I've put together 15 rev2 boards now and they all get to the point where the CPLD is hot to touch, whereas the rev1 board I have stays quite cool.
Is there a reason the rev2 runs significantly hotter?
Re: TF536 Bulk Order (Batch 1 Shipped)
Posted: 22 Jun 2020 11:25
by terriblefire
PaulJ_2.0 wrote: 22 Jun 2020 11:12
I've put together 15 rev2 boards now and they all get to the point where the CPLD is hot to touch, whereas the rev1 board I have stays quite cool.
Is there a reason the rev2 runs significantly hotter?
Try the same rev2 firmware in the rev1 .. it will get hot. There is a pin floating but i cant figure out which one and disabling floating breaks it for alenppc.
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 11:53
by supaduper
Just buy some raspberry pi heat sinks 14mm or 15mm square, they work great on the TF360 CPLDS to dissipate the heat
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 14:58
by matt020
OOooooh, is this something thats gunna cause us people in hot climates some headaches? Australia's summer can sit in the 30's no probs.... :o
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 15:04
by terriblefire
Rev 1 and rev2 are the same apart from bus buffers, 3 pull ups and 2 pins swapped. I can give out a version that has keeper set that probably will run cold. But none of mine are too hot to touch.
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 15:30
by terriblefire
@PaulJ_2.0 try out all of these and see if any of them work and stay cold.
tf536r2_2020_06_22_alpha_keeper.zip
tf536r2_2020_06_22_alpha_float.zip
You're the first person to mention that heat is an issue with the TF536. The keeper ones will be colder but may not work.
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 16:21
by PaulJ_2.0
terriblefire wrote: 22 Jun 2020 15:30
@PaulJ_2.0 try out all of these and see if any of them work and stay cold.
tf536r2_2020_06_22_alpha_keeper.zip
tf536r2_2020_06_22_alpha_float.zip
You're the first person to mention that heat is an issue with the TF536. The keeper ones will be colder but may not work.
Ok I have tested the keeper ones and 7 is the best performing of the three (5 refuses to boot), but the CPLD is still quite warm.
6 got too hot and crashed after 15 mins stress
7 is still going fine after 20 mins stress.
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 16:30
by terriblefire
Hmmmm. I think there is a short somewhere.
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 16:41
by PaulJ_2.0
terriblefire wrote: 22 Jun 2020 16:30
Hmmmm. I think there is a short somewhere.
100% not shorted. The CPLD isn't getting any hotter and is still going fine stressed after 40 mins, so it seems like a win.
Re: TF536 Rev2 Gets Hot
Posted: 22 Jun 2020 16:45
by terriblefire
PaulJ_2.0 wrote: 22 Jun 2020 16:41
terriblefire wrote: 22 Jun 2020 16:30
Hmmmm. I think there is a short somewhere.
100% not shorted. The CPLD isn't getting any hotter and is still going fine stressed after 40 mins, so it seems like a win.
I expected 7 to be the best but the phase shouldnt cause a temp difference.. that *IS* weird.