Nothing the PMIC can do once it is gone. There isn't enough capacity in the caps t keep a board running.
9V is better than 15V. Gerald On Thu, Mar 13, 2014 at 3:24 PM, <[email protected]> wrote: > Gerald Coley <[email protected]> wrote: > > [-- text/plain, encoding quoted-printable, charset: ISO-8859-1, 47 lines > --] > > > > If you cut power, the processor turns off so it is hard for it to keep > > running and print logs without power. > > > Yes, I realise that, but I wondered if the power management chip 'saw > it coming' and did something while the capacitors discharge. > > > > Hook a meter to the DC input and see if it turns off. If it does, the > 7805 > > is shutting down. The best that can do is 500mA without a heat sink,. > > > I'm a bit tight for time (going home, leaving this BBB running on our > boat) so I've reduced the input voltage to the 7805 from raw battery > voltage which is about 14 volts down to 9 volts (which I need for > various other devices). Thus the 7805 will be dissapating much less > power now - (4 x current) watts as opposed to (9 x current) watts. > > -- > Chris Green > ยท > > -- > 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.
