How to connect external power supply to BeagleBone AI?

[rr]

Hello,

With BeagleBone AI...
is it possible to use external power supply instead of powering from USB?

I would want to use it for a mobile application (Battery or LiPo). USB should be connected just for debug or update purposes.

1. If it possible at all to use external power supply? There is no connector on the board

2. If possible, is it possible to use USB, while external power supply is connected? Or would this cause a damage?

Thanks

Richard

[Robert Heller]

At Wed, 26 Aug 2020 01:36:02 -0700 (PDT) beagl...@googlegroups.com wrote:

>
> Hello,
>
> With BeagleBone AI...
> is it possible to use external power supply instead of powering from USB?
>
> I would want to use it for a mobile application (Battery or LiPo). USB
> should be connected just for debug or update purposes.
>
> 1. If it possible at all to use external power supply? There is no
> connector on the board

I have not looked at the BeagleBone AI, but I presume it has GPIO headers,
like the BeagleBoneBlack and the PocketBeagle. On both the BeagleBoneBlack and
PocketBeagle, there is a 5V supply pin -- P9-7 and P9-8 on the BeagleBoneBlack
and P1-1 on the PocketBeagle, which can be connected to a 5V supply.

> 2. If possible, is it possible to use USB, while external power supply is
> connected? Or would this cause a damage?

Should be fine. If it is like the BeagleBoneBlack or PocketBeagle the USB
power and header Vin pins go to seperate pins on the power management chip,
which takes care of selecting power sources, depending on what is available.

>
> Thanks
> Richard
>

--
Robert Heller -- Cell: 413-658-7953 GV: 978-633-5364
Deepwoods Software -- Custom Software Services
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[robert.sty...@gmail.com]

Looking at the A1 schematic

Connect external 5V, + to P9.5 and P9.6 and - to P.9.1 and P9.2.

Diodes protect from connecting both cape and USB type C at the same time.

P9.1 P9.2 GND

P9.3 P9.4 VDD_3V3 output to Cape

P9.5 P9.6 VDD_CAPE_5V input to BBAI

P9.7 P9.8 VDD_5V output to Cape

There is a diode from VDD_CAPE_5V to VDD_5V

There is a MOSFET over-voltage breaker from TypeC_VBUS to VDD_TYPE C; and diode from VDD_TYPE C to VDD_5V