Thanks, I have been experimenting with different cap values and am not
seeing any irregular voltage drop on the output of my regulator. I might
decide to use a DCDC converter. Which regulator are you using?
On Wednesday, March 5, 2014 1:20:49 PM UTC-8, c...@isbd.net wrote:
>
> edwin...@gmail.com wrote:
> > [-- text/plain, encoding 7bit, charset: UTF-8, 22 lines --]
> >
> >
> > Using the Beaglebone black Revision A6A. I powering it with supplying 5V
> to
> > the Vdd pins. The 5V is coming from an adjustable regulator with an
> enable
> > line. Also I have a 10uF tantalum capacitor on the regulator's output to
> > avoid sending a noisy 5V.
> >
> > When that enable line goes high, the beaglebone black does not power on
> all
> > the time. Sometimes the BBB boots properly. However, instead of
> powering
> > on sometimes, it seems that the power management chip on the BBB is
> > switching Vdd to no load. I still have a similar result with different
> > tantalum cap values.
> >
> > What is the state of the switch in the power management chip on a rising
> > edge of Vdd? Has anyone else had a problem powering the BBB with Vdd?
> >
> I'm doing almost exactly what you're doing except that my regulator
> chip doesn't have an enable line. So far it has worked exactly as it
> should, applying power by plugging the 5v supply into pins 1 and 3 on
> P9 just powers the BBB up as normal. I only have a .33uF tantalum on
> my regulator input and nothing on the output.
>
> --
> Chris Green
> ·
>
>
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