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.
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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.
I suggest you make a prototype and test it. Designs may look OK if you see them at a glance, but after printing you may find many issues.
What you mean by you dont pay attention that you dont cut it? And what you mean by thin connections around the MOSFETs that could be improved?
What you mean by “But be careful to filter both when the logic GND comes from the Power GND.” ?
And by saying “For the power tracks, don’t hesitate to use plans rather than wide tracks, more work but more efficient.” you mean fill zones ?
For the third time: Go back to components placement.
No specific KiCad-questions, can be closed.
decoupling capacitors must be placed close to IC
type C differential pair look very bad
ldo pin2 better set solid fill with polygon for better cooling
but in general there is a chaos on the board
better attach schematic
You say go back to component placement I got it it’s not a good placement but you dont give any feedback about what’s wrong. What do you expect me to then ? Try another random design ??
Do you expect that others make your layout?
You got tips. You ignore them.
And you ignore the fact, that the KiCad-forum is not for asking questions like you do.
“Do you expect that others make your layout?” Is this what you understood from what I say? You gave no tips or opinion just said “do it again” without any reasonable feedback. How do you say I ignore tips ? I am asking questions to understand why
I am closing this thread as it isn’t kicad specific but layout circuit generic.
If you require help with a specific kicad question to achieve your need, feel free to open a dedicated thread