Hi,

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..

Thanks

2016-03-02 16:59 GMT+01:00 Luke Kenneth Casson Leighton <lkcl@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@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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