On Monday, January 26, 2015 at 12:56:31 PM UTC-7, mjc wrote:
> The BeagleBone Black & BlueSteel Basic seem to be extremely sensitive to the rise time of the 5V power supply at startup. > 1 ms or longer is a problem, and it is not at all unusual for power supply to be slower than this. > 200 us is reliable. > > >From the datasheet for the TPS65217 PMIC used on the BBB, section 9.3.9.1, TI seems to agree. Note that the rise time of VAC and VUSB must be less than 50 ms for the > detection circuits to operate properly. If the rise time is longer than 50 > ms, the IC may fail to power up. HTH Dennis Cote -- 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]. For more options, visit https://groups.google.com/d/optout.
