Re: Anyone know how the slug 5V to 3.3V power conversion works?
- The FP5452 datasheet has an application note that should provide the
basic design. I just took a look at one of my units and capacitor C45
is bulging in the same way as ones on a few failed motherboards I
fixed a while ago. It is possible that you have the same problem.
There was quite a scandal about it a few years back. If it turns out
to be a problem, you need a low ESR device in that location and
replacing C48 as well would be a good idea.
--- In email@example.com, Rod Whitby <rod@...> wrote:
> I have a slug which is not working (symptom is a short blink on the
> power led on power-up, and then nothing on any leds after that, and
> nothing on the serial console), and I'm measuring less than 1V on the
> 3.3V power rail.
> Does anyone have any details on the slug's internal power conversion
> circuitry? I'd like to work out what has failed ...
> -- Rod