Battery

[Sri Ram]

Hi,

Is 3S battery compatible with Beaglebone blue?

Thank You

[Robert Nelson]

On Thu, Jul 13, 2017 at 3:26 PM, Sri Ram <srih...@gmail.com> wrote:
>
> Hi,
>
> Is 3S battery compatible with Beaglebone blue?

no, 2s only..

https://github.com/beagleboard/beaglebone-blue/wiki/Accessories#Batteries

Regards,

--
Robert Nelson
https://rcn-ee.com/

[William Hermans]

On Thu, Jul 13, 2017 at 1:35 PM, Robert Nelson <robert...@gmail.com> wrote:

On Thu, Jul 13, 2017 at 3:26 PM, Sri Ram <srih...@gmail.com> wrote:
>
> Hi,
>
> Is 3S battery compatible with Beaglebone blue?

no, 2s only..

https://github.com/beagleboard/beaglebone-blue/wiki/Accessories#Batteries

Regards,

So here's the problem.
https://github.com/beagleboard/beaglebone-blue/blob/master/docs/BeagleBone_Blue_ShortSpec.pdf

Page 3 states:

e. Power management:
i. TPS65217C PMIC is used along with a separate LDO to provide power to the
system (Integrated in the OSD3358)
ii. 2 cell (2S) LiPo battery charger (powered by 9 – 18VDC DC Jack)

The problem is this. I think I understand  what the documentation is trying to say, but this can be misleading. The voltage should be left out of the battery "section" and perhaps mention that the system must be powered by the DC jack. Because 2s batteries are 7.4v nominal, and fully charged 2s batteries are 8.4v

You see what I'm getting at ? When you include the DC jack voltage into the battery spec section, you're confusing the issue, and almost making the documentation contradictory. e.g. it almost makes it seem like a 3s, or maybe even a 4s pack would work.

[Sri Ram]

Can I use 5 V Ubec to power the board?

If it is possible, then which pins do I have to connect the UBEC?