Could you share your schematic?
Gerald On Fri, Dec 11, 2015 at 7:14 PM, Morgan Redfield <[email protected]> wrote: > I think I managed to burn out the TPS65217 on the BBB using a custom cape > that I designed. The cape has a DCDC switching regulator that I'm using to > drop a 12V supply down to 5V for the beagle bone. I have the 5V from that > switching regulator connected to pins P9.6 and P9.5. > > I've now had two BBBs fail while powering them from the board. I left both > on for a couple of days, and at some point the BBB just died. After that, > the BBB don't boot at all, even with the cape unplugged. > > When I apply 5V from a benchtop supply to P9.6, I only see 1.1V on P9.7 > (system 5V). > If I hit the power button (S3), then the voltage on P9.7 will jump up to > around 2.5V before falling back to 1.1V over around 20s. > > I'm not sure what's going on here, since the power supply I'm using looks > pretty clean to me. It's an average of 5.14V with max 150mVpp noise. It's > rated to 2A current draw. Switching frequency is 150kHz. > > Does anyone have any idea what might be happening here? Any ideas about > what I should try next? > > Thanks, > Morgan > > -- > 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. > -- Gerald [email protected] http://beagleboard.org/ -- 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.
