are you saying that the ncp349 *CONTAINS* a full wave bridge rectifier? I certainly didn't see that in the data sheet. Note the point is protection from overvoltage and possibly, thus the question, polarity reversal which may or may not be the same as severe under voltage.
Eric On Wed, May 21, 2014 at 11:18 PM, Bayani Custodio < [email protected]> wrote: > Full wave bridge rectifier, if they make 'me small enough would be the > cat's meow. Worked we'll on an old project back in the op amp days. > > Sent from my iPad > > On May 21, 2014, at 11:41 PM, Eric Fort <[email protected]> wrote: > > the ncp349 chip used for overvoltage protection on the dc power input for > the beaglebone seems to do a good job of providing overvoltage protection. > Even looking at it's datasheet though, I'm not completely sure if it will > protect the board against reverse polarity. (I'm not out to overtly or > purposely try this but I too have occasionally made mistakes...) > > so should the beagle bone white/black be protected from application of > reverse polarity being applied, i.e. powering it with -5v instead of +5v, > by the ncp349 (or might it be a good idea to add a reverse polarity diode > across DC in that will pop the power supply & save the board. > > Eric > > -- > 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. > > -- > 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. > -- 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.
