Not likely. As I said we need more boards that fail and the power supply that is used with them. What I have seen is that it tries to switch to the battery, that is not there, for whatever reason. Theory is it sees a voltage drop due to the inrush limit on certain power supplies. I have fixed this on a few boards by connecting the TS signal hard to ground using the battery pins on the board.
What I see when the board "does not power up" is the PMIC cycling on and off. You can look at the 5V output rail of the PMIC for this condition. Gerald On Fri, Nov 14, 2014 at 9:03 AM, Bremenpl <breme...@gmail.com> wrote: > I dont agree here, and this is the weird part. A cheap 5V wall plug > adapter works great and a certified meanwell supply does not. Can it be a > case related to linear/ switching power supply? > > Dnia 14 listopada 2014 16:01:26 Gerald Coley <ger...@beagleboard.org> > napisał(a): > >> We are working on one if we can collect enough information to confirm the >> issue. it appears to be a power supply issue that creates a condition that >> the TPS65217C does not like. If you use a good power supply, the issue is >> not there. >> >> >> Gerald >> >> >> On Fri, Nov 14, 2014 at 8:31 AM, Bremenpl <breme...@gmail.com> wrote: >> >>> Is there a workaround for this? I thought that pre charged capacitors >>> could help but in my application power to the BeagleBone Black is aplied in >>> the same time as to the rest of the circuit. >>> >>> W dniu 2014-11-14 o 15:19, Gerald Coley pisze: >>> >>> The power management IC, TPS65217C. >>> >>> Gerald >>> >>> >>> On Fri, Nov 14, 2014 at 8:15 AM, Bremenpl <breme...@gmail.com> wrote: >>> >>>> What is the exact circuit that requires a fast ramp? >>>> >>>> W dniu 2014-11-14 o 14:48, evilwulfie pisze: >>>> >>>> As Gerald has said before, check the ramp up of the power supply. >>>> Some of the lab supplys have slow ramp ups. >>>> Yes they are very stable and VERY good regulation but >>>> the BBB design requires a fast ramp up supply. >>>> >>>> >>>> >>>> On 11/14/2014 3:03 AM, bremenpl wrote: >>>> >>>> Hello there, >>>> I have a very strange problem with powering up BeagleBone Black (rev >>>> C).... When i try to power it up from some cheap AC adapter it works fine, >>>> but when I connect to to my labolatory power supply the power LED on board >>>> is lid for a second and then doesnt power up the MCU and turns off intead. >>>> I have connected both supplys to osciloscope and they are both stable, the >>>> laboratory one even more. Why is the power controller on the BeagleBone >>>> Black refusing to power up the MCU when powered from lab supply? I have no >>>> idea what is this about. I would aprichiate any help. >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to beagleboard+unsubscr...@googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "BeagleBoard" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/beagleboard/xRPC_39ju9Y/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> beagleboard+unsubscr...@googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> >>>> -- >>>> Bremenpl >>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to beagleboard+unsubscr...@googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >>> >>> -- >>> Gerald >>> >>> ger...@beagleboard.org >>> http://beagleboard.org/ >>> http://circuitco.com/support/ >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/xRPC_39ju9Y/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> beagleboard+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >>> >>> -- >>> Bremenpl >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to beagleboard+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Gerald >> >> ger...@beagleboard.org >> http://beagleboard.org/ >> http://circuitco.com/support/ >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/xRPC_39ju9Y/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- Gerald ger...@beagleboard.org http://beagleboard.org/ http://circuitco.com/support/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
