I'm running my Beaglebones off the +5V line of a ATX Power supply with no problems. I have not tried the standby power line, but according to wikipedia http://en.wikipedia.org/wiki/ATX, the standby +5V (Vsb) is spec'ed to a peak to peak ripple of 50mV, and the same as the +5 VDC (main 5V line) from the ATX supply. So, there SHOULD BE NO PROBLEMS with ripple.
I've had my Beaglebone(s) (yeah, a few of them) powered on the ATX supply for weeks now without any problems. Paul Tan. http://www.exadler.com http://exadler.blogspot.com On Thursday, October 10, 2013 9:01:35 AM UTC-4, tushar gurjar wrote: > > Thanks Charles & Liyoshi for your inputs! > > Btw. , Are there any chips which will specifically remove the high ripples > @5V yet allow around 1.5 A current to flow ? Would a low ESR > 10uF/100uF/1000uF cap between SMPS & Beagleboard XM do the job? > > Best Regards, > Tushar > > ------------------------------ > Date: Wed, 9 Oct 2013 09:07:29 +0800 > Subject: Re: [beagleboard] Is it safe to power Beagleboard XM Rev B with > 5V Supply of PC ATX SMPS? > From: [email protected] <javascript:> > To: [email protected] <javascript:> > > As I remember , BeagleBoard Xm will have a limit of power protecter . over > 5.3v or lower than 4.xv (not clear about this ) > You will not be able to power up the board . TPS65930 will not power up > the omap3730 > ATX power 5V will always have the very big ripple . > > If you can boot up normally , ignore this . > > > > > 2013/10/8 Charles Steinkuehler <[email protected] <javascript:>> > > On 10/8/2013 9:37 AM, tushar gurjar wrote: > > > > > > Hello, > > > > Is it safe to power Beagleboard XM rev B with the +5V DC output of PC > > ATX SMPS directly or should a linear regulated 5V supply be used > > instead to be on the safer side? > > > > In other words, does the Beagleboard XM have circuitry to handle 5V > > SMPS supply input ? > > Well, the "wall-wart" supplies recommended for the BeagleBone are all > switching-mode power supplies, so the ATX supply should work just fine. > > Note that you do need to have enough load on the supply for it to > operate properly, there are different 'flavors' of ATX supplies and they > have different minimum load specifications. Also note that the 5V aux. > supply (that is on all the time) is rated for 2A on almost all recent > ATX supplies. I plan on running the 'Bone off the 5V aux. rail so it's > on all the time, and using the switched 5V and 12V to drive my 3D > printer so "machine power" is only active when I'm printing something. > I haven't done this yet with the 'Bone, but it's how I had the Arduino > controller hooked up, and it worked fine. > > Also, if you're _only_ using the 5V aux supply for the 'Bone, you don't > need to worry about turning the ATX supply on or having a proper load on > the higher-current 5V and 12V lines. Just hook up two wires and you're > done. :) > > -- > 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] <javascript:>. > For more options, visit https://groups.google.com/groups/opt_out. > > > > -- > 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] <javascript:>. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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/groups/opt_out.
