There was a thread on this topic a while back and one of the solutions was a hardware modification to the BBB (all since rev A6, I think). The problem was the VDD_3V3A would not go low enough to shut U4 down. Solution was to connect U4 pin 1 (EN) to VDD_3V3AUX.
Not sure if a better solution has been found. On Tuesday, September 22, 2015 at 9:44:25 AM UTC-7, Jim Baxter wrote: > > We are developing a product using the BBB. With battery backup to allow a > safe shutdown of the BBB and a safe restart of the application. The BBB > charges the Li ION cell OK but when the AC power to the BBB via the 5 volt > DC jack is switched off, the BBB draws approx 80mA from the Li ION cell and > does not go into low current sleep mode. Can anyone assist in fixing this > issue please as TI do not wish to support the BBB which is surprising > considering that most of the major chips are TI ones! > > Any assistance wold be most welcome :) > > > -- 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.
