thanks everyone, so I guess the answer is yes? xbee uses 215ma max, so it looks like it's safe
On Tuesday, May 27, 2014 9:03:18 AM UTC-4, PLyttle wrote: > > > I doubt that. The pins are connected together. Also: > > 6.1.9.2 VDD_3V3A Rail > The VDD_3V3A rail is supplied by the TPS65217C and provides the 3.3V for > the > processor rails and can provide up to 400mA. > > 6.1.9.3 VDD_3V3B Rail > The current supplied by the VDD_3V3A rail is not sufficient to power all > of the 3.3V > rails on the board. So a second LDO is supplied, U4, a TL5209A, which > sources the > VDD_3V3B rail. It is powered up just after the VDD_3V3A rail. > > U4 is capable of sourcing 500 mA, but on-board it also powers nand, > ethernet and uSD. Whatever is left for externals is less than 500 mA, 250 > mA left as is documented seems reasonable. > > LP > > > On Tuesday, May 27, 2014 1:28:57 PM UTC+2, Charles Steinkuehler wrote: >> >> Those numbers are for each pin, so 500 mA total. >> >> On 5/27/2014 2:04 AM, PLyttle wrote: >> > When you read the service reference manual, section 8.6, you find that >> the >> > VDD_3V3B at P9 pins 3 and 4 can source 250 mA max. >> > >> > On Tuesday, May 27, 2014 12:38:13 AM UTC+2, Robert P wrote: >> >> >> >> Hi everyone, I'm trying to figure out if it's safe to power an xbee >> off >> >> the 3.3V header on the bbb ( P9_3 / P9_4 ) .. I need 250ma-300ma MAX >> >> >> >> >> >> is this safe and stable? It would seem like it, but I want to >> confirm.. >> >> thank you! >> >> -- >> Charles Steinkuehler >> cha...@steinkuehler.net >> > -- 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.
