I made some advancement on the project !
Some time ago I received the second version of my main pcb, so I put everything together.
All voltages are working, unfortunately I have made several mistakes :
1 - I reversed the connections at the USB multiplexer, so I rewired that with magnet wires.
2 - 5V reg are not Synchronous regulator (so efficiency are not optimal) ... I learned this while watching a GreatScott! video after having already send the PCB order.
3 - 5V reg can't be full turn OFF, so I have Vsys on the output even when EN = 0V, that break the logical of the USB multiplexer.
Luckily I still had an RVL PMS pcb, so I soldered the regulator that goes on it and I cut the PCB to then connect it to mine.
So here is the result :
So now all of that work fine :
- All regulators
- USB PD
- µSD to USB
- Enable 5V reg when 5V is plugged in and the circuit is OFF (to switch the µSD card to the USB-C connector).
- D+ D- to 2D+ 2D- connection way on the multiplexer
And the big problem that I have now is the multiplexer that switch correctly to the D+/D- to 1D+/1D- or 2D+/2D-, but work only on the 2D line, it doesn't work at all when it is on 1D line.
I think it is because this multiplexer can do audio too ?
I use the NLAS7242, firstly I wanted to use the TC7USB42MU, but it is nowhere to be found in stock.
So for now I will order another one (TS3USB30) that have the same logic and footprint, and almost the same pinout (only one pin to change) for testing ... I hope it will work !