04-13-2017, 02:36 AM
(04-11-2017, 09:11 PM)MarkHaysHarris777 Wrote: Again, the problem is NOT the rating on the PSU; its the bootup current spikes, and its also the fact that switching power supplies that are not properly filtered will cause problems for the PMIC; and the PMIC axp803 is very sensitive.
If there is even a small ripple in the DC-DC converter output the PMIC WILL shutdown. and the board will go dead.
Since that is the case (which it will be 9 times out of 10 with this sort of random and inconsistent issue)... I'll remind you yet again that in my instance... this is with the lithium battery connected to the pine64! So are you suggesting that the PMIC is also unable to instantaneously switch between the external input and the battery input as it designed to? I'm more than happy to entertain that thought, but want to know if that is what you are suggesting, or you have missed that detail?
Do you think the HDMI being connected might simply be adding some extra capacitance and/or power, and helping smooth things out, be making the PMIC regulate slightly better since it has a bit more work to do?
And regardless of this discussion, of course powering the pine64 via the euler bus and a properly rated 'clean' power supply (ie. the international white raspberry pi power supply) is the prefered approach for those wishing to be happy pine64 users
