drgeoff wrote: ↑
Sat Dec 08, 2018 4:26 pm
Are you, and on behalf of RPF, disputing the "it should not" part of hippy's statement "This is known to kill the regulator on a Pi3B+, it should not, .."?
I'm not sure where I made that statement or if I used those words exactly, but it's a reasonable paraphrasing of my view even if I did not.
My belief, from my reading of its datasheet, is that the PMIC is intended to be short-circuit proof, protected against over-current. That is, a short-circuit drawing over-current should not damage the chip, render it permanently inoperable.
Fault protection features include input undervoltage lockout, overcurrent protection, and thermal protection.
It is reasonable to expect a chip advertising itself to be short-circuit proof to be short-circuit proof.
If something intended to be short-circuit proof isn't actually short-circuit proof it is reasonable to consider that to be a product defect.
If there is a product defect it would be reasonable to claim under warranty for a repair or replacement when that defect bites.
This view would seem to be confirmed and shared by a forum moderator here - viewtopic.php?f=28&t=226423#p1389238
mahjongg wrote: ↑
Wed Nov 07, 2018 3:56 pm
The 3V3 supply from the PI3B+ doesn't seem short circuit proof under all conditions.
The best solution would be to return the PI3B from where you bought it, and to claim guarantee.
The problem is being investigated, as the chip maker claims the 3V3 supply should be short circuit proof.
And in the Boot Sticky - viewtopic.php?t=58151
There have been some reports of the 3V3 supply suddenly stopping working, often after shorting the 3V3 to GND, but in a few cases also spontaneously. The issue is under investigation.
If the 3V3 supply has disappeared, then return the PI to the reseller.
Those both appear to be indicating that if the 3V3 disappears, because of a short or otherwise; make a warranty claim.
If that is not so then the Foundation need to clarify what the situation is and reconcile what appears to be contradictory views being presented on on the matter.