IIRC, the pocketbeagle can see current spikes over 200 mA from the battery while it is booting, although it takes less power after it is booted and idling. Probably one of two things is happening. The battery voltage droops and either its own protection circuitry cuts off the power or the PMIC on the pocketbeagle shuts down the system.
You might be able to see it happening with a voltmeter if you have one monitoring the battery voltage while you try to boot. The voltage will suddenly drop if the battery circuitry is cutting out. Or it will recover some after the pocketbeagle shuts off if its PMIC is cutting out. Make sure, if you're going to try to power the pocketbeagle with a small capacity battery, that it is capable of greater than 1C discharge. Even then it won't last long depending on what you are doing. On Saturday, February 2, 2019 at 7:18:37 AM UTC-7, Masatsune Tokuhira wrote: > > Hi, > > > Here are two charged LiPo batteries. When connecting 860 mAh, the > PocketBeagle can start normally. If it is 280 mAh, press > POWER_MINI_PUSHBUTTON and power down after 4 user LEDs light up in around 5 > seconds. Even with a 280 mAh battery, once it is started with the help of > the power supply from the USB, it can operate only with the battery after > that. > > > Does it stop because it is not able to supply enough current at startup? I > do not have an ammeter, but I'd appreciate it if you know someone who knows > how to check it. > > > Does anyone have an example that standalone operation is possible with a > small battery? If there is any contrivance in the electric circuit and/or > boot sequence there, I would like you to share it. > > > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/75f63d74-bc8d-4cba-8005-f41f640251e2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
