[Arm-netbook] EOMA68 laptop battery management.

Jakub Kákona kaklik at mlab.cz
Wed Mar 2 16:25:12 GMT 2016

It looks like power schema I expect that is already been done.  But a
current design is still not fully clear to me.
I will probably print the schematics PDFs on large A3 sheets tomorrow and
try to find out how the Libre internals are interconnected currently..


2016-03-02 16:59 GMT+01:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:

> ---
> crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
> On Wed, Mar 2, 2016 at 1:43 PM, Luke Kenneth Casson Leighton
> <lkcl at lkcl.net> wrote:
> > argh - the bq2419x series only provides up to 1.5A @ 5V in USB-OTG
> > mode, not 3A.  which rules it out.  it's otherwise perfect, damnit.
>  ok, i thought about this, and i reckon that it'd be ok to do this:
>  * use the USB-OTG "boost mode" to provide USB-OTG power to the EOMA68
> CPU Card [only]
>  * put the SYS-V output through to the main PCB1, where it will do
> boost conversion to 5.0V for USB ICs.  SYS-V output could go directly
> into the step-up converter for the LCD backlight, and also directly
> into the 3.3v regulator.
>  so... the spec doesn't change, just the implementation of PCB1.
> l.
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