Pine A64 Plus Fails to Boot
#24
(04-11-2017, 06:34 PM)pfeerick Wrote:
(04-10-2017, 09:46 PM)MarkHaysHarris777 Wrote: TinkerBear,  this is also for Pete, the problem <snip>

Sorry Macrus, this does NOT apply to me... I am not, and have never run from a wall wart PSU, but from a 4A DC-DC PSU set at 5.25v,  <snip>

hi Pete,  look cloooser...   I did not say it applies to you, I said the response is also for you .

...  that means that I'm responding to two people at once, rather than just TinkerBear  (whether it applies to you is another colored horse)  <sorry for the confusion>   Wink

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.

TinkerBear's idea of a small cap added to the board itself is interesting (and may be easier, depending upon skills) but I chose to filter the DCIN so that the ripple is non-existent.  For other people as well,  this might apply more stringently if the user plans to install the pine board in an automobile or plans to use the SLA battery schema. 

Shy
marcushh777    Cool

please join us for a chat @  irc.pine64.xyz:6667   or ssl  irc.pine64.xyz:6697

( I regret that I am not able to respond to personal messages;  let's meet on irc! )


Messages In This Thread
Pine A64 Plus Fails to Boot - by grobbs - 03-27-2017, 01:04 PM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 03-27-2017, 07:52 PM
RE: Pine A64 Plus Fails to Boot - by xalius - 03-28-2017, 05:14 AM
RE: Pine A64 Plus Fails to Boot - by grobbs - 03-28-2017, 01:50 PM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-08-2017, 11:21 PM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-09-2017, 02:08 PM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-09-2017, 03:18 PM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-09-2017, 05:16 PM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-09-2017, 07:17 PM
RE: Pine A64 Plus Fails to Boot - by Luke - 04-10-2017, 05:31 AM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-10-2017, 07:42 PM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-10-2017, 08:56 PM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-10-2017, 09:18 PM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-11-2017, 06:34 PM
RE: Pine A64 Plus Fails to Boot - by MarkHaysHarris777 - 04-11-2017, 09:11 PM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-13-2017, 02:36 AM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-16-2017, 03:02 AM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-10-2017, 10:59 PM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-11-2017, 05:28 AM
RE: Pine A64 Plus Fails to Boot - by dkryder - 04-11-2017, 05:22 AM
RE: Pine A64 Plus Fails to Boot - by xalius - 04-11-2017, 05:37 AM
RE: Pine A64 Plus Fails to Boot - by dkryder - 04-11-2017, 03:17 PM
RE: Pine A64 Plus Fails to Boot - by Luke - 04-11-2017, 04:32 PM
RE: Pine A64 Plus Fails to Boot - by tommypine - 04-12-2017, 04:47 AM
RE: Pine A64 Plus Fails to Boot - by tommypine - 04-13-2017, 02:56 AM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-13-2017, 05:07 AM
RE: Pine A64 Plus Fails to Boot - by tommypine - 04-13-2017, 10:18 AM
RE: Pine A64 Plus Fails to Boot - by TinkerBear - 04-17-2017, 12:52 AM
RE: Pine A64 Plus Fails to Boot - by tommypine - 04-17-2017, 02:45 AM
RE: Pine A64 Plus Fails to Boot - by pfeerick - 04-17-2017, 06:06 PM

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