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 > [email protected] <javascript:> > -- 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.
