USB port is limited to 500mA by the power FET switch. As long as you don't go too far past that you should be OK.
Gerald On Sat, Jan 3, 2015 at 6:14 PM, <[email protected]> wrote: > Just wanted to double check as I bought the BBB to use as a file server. > You are all saying it is impossible to power a 2.5" HDD through USB via the > BBB with a 5V 2A charger? Many other mini boards can do this so why not the > BBB? > > On Wednesday, 5 June 2013 20:22:16 UTC+2, Jordi Guillaumes Pons wrote: > >> >> Hello, >> >> I'm having trouble when I try to power a BBB using a USB charger via the >> miniUSB port. As I have read, this is a common problem (it seems to starve >> its 500mA input limit when booting from a uSD and trying to use the >> ethernet). >> >> Now, I know it is posible to set up the power controller to allow 1300 or >> 1800 mA, talking to the tps65217c via I2C and overwriting the power path >> control register at address 0x01. Another different issue is if that >> _should_ be done, and _how_. So my questions are: >> >> 1) Is it safe to do that? The "barrel" power input is maxed at 2500mA, >> and If I understand correctly the datasheet, it does not seem to be >> anything what could explode in the mUSB current path... >> >> 2) HOW should it be done? I have tried to put a i2c wm statement in the >> /boot/uboot/uEnv.txt file but when I read back the register after linux >> boots it is back at 500mA, so I guess linux resets the device at boot... >> > -- > 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. > -- Gerald [email protected] 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
