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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.
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.