The output voltage level is different. When the DC is contented it is supposed to go to the DC input and go into charge mode for the battery. Measure the output voltage of the PMIC. If it is 5V, then it is DC in. If it is 3.7V +/- then it is running on the battery.
Gerald On Fri, Nov 14, 2014 at 9:37 AM, Bremenpl <breme...@gmail.com> wrote: > How can I know either it switched without taking the battery out? > > Dnia 14 listopada 2014 16:35:42 Gerald Coley <ger...@beagleboard.org> > napisał(a): > >> Another test here would be to connect the battery and see if after it >> switches to the battery if it switches back to the DC input. >> >> Gerald >> >> >> On Fri, Nov 14, 2014 at 9:31 AM, Bremenpl <breme...@gmail.com> wrote: >> >>> I understand, thank you for the info. I will make more attempts at >>> monday with another bbb board. For now I have a 10k resistor on the TS pin >>> because I intend to use the battery to. If the voltage is measured on the >>> resistor ill swap it to lower value one. I hope ill get it working using >>> meanwell power supply. >>> >>> Dnia 14 listopada 2014 16:16:30 Gerald Coley <ger...@beagleboard.org> >>> napisał(a): >>> >>>> 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 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 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 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