Hi all!,
I am looking for any tips or tricks on isolating noise from some power switches from the current sense portion of my circuit.
I already laid out a simple test board for my project, below is a portion of it. I believe I might have made a mistake by having the output at P2 run across the current sensing resistors R5 and R6. I am getting quite a bit of switching noise present on the output of the sensing resistors. There didn't seem a very elegant way to do this.
This isn't a big deal right now, but I will be laying out the final board soon. I will have 6-layers to work with, so I am hoping that might help with noise isolation. Can anyone offer tips about how to do this? I was thinking of soldering thick gauge wire to the PCB track to minimize inductance on the switching power lines. I'm trying to think of a good way to do it with more layers.
I am planning on operating this circuit from 50KHz to 100KHz and it will be putting out 2.8A rms max.
Any suggests would be welcomed, thank you!
Stephen
I am looking for any tips or tricks on isolating noise from some power switches from the current sense portion of my circuit.
I already laid out a simple test board for my project, below is a portion of it. I believe I might have made a mistake by having the output at P2 run across the current sensing resistors R5 and R6. I am getting quite a bit of switching noise present on the output of the sensing resistors. There didn't seem a very elegant way to do this.
This isn't a big deal right now, but I will be laying out the final board soon. I will have 6-layers to work with, so I am hoping that might help with noise isolation. Can anyone offer tips about how to do this? I was thinking of soldering thick gauge wire to the PCB track to minimize inductance on the switching power lines. I'm trying to think of a good way to do it with more layers.
I am planning on operating this circuit from 50KHz to 100KHz and it will be putting out 2.8A rms max.
Any suggests would be welcomed, thank you!
Stephen