Hi, I am trying to do Synchro Buck with input output power measurement by using type c and usbc esp32 digital part. This is my first pcb I would be really glad if someone can rate it.
It is difficult to know what is what, and it would be helpful if you could post at least a schematic or (even better) the whole project folder.
Do you think you can do either of those?
You have this GND-zone on the right side, but you don’t pay attention that you don’t cut it. There are thin connections around the MOSFETS that could be improved.
Also the placement of components could be better.
I think you started too early with routing. Go back to placement of components and watch the ratsnets.
I’m sorry to say that.
1 Like
I see a sense resistor that should be connected in a better way. The power tracks are correct from left and right but the sense lines shoud be routed under the resistor and connected under the resistor to the left and right to reduce influence of the copper resistance.
If I see it right, you have a 8mR resistor, the copper resistance can not be neglected in such cases.
Hello
Robert Loos is right, the Shunt connections are not good.
En Photo un exemple de routage.
The system must be symmetrical, the measurement by the center of the shunt legs, the connections short and protected by ground planes.
For the power tracks, don’t hesitate to use plans rather than wide tracks, more work but more efficient.
Making a power GND and a logic GND is a good idea. But be careful to filter both when the logic GND comes from the Power GND.
For a first PCB it’s fine, but with experience some routing rules will come.
Just by moving R19 R20 and C14 above the shunt, you’d have less cuts in you GND plane.
With such low value shunts, you should consider Kelvin connection resistors.
I repeat: Delete your rounting, go back to placement.