veeru612
Newbie level 4
Hi,
I hope everyone is staying safe and well in these tough times.
I have a PCB that is about 1" x 1" in size. It is a 4 layer board with a dedicated ground and power plane. I have 3 LED drivers that get pulsed at 5KHz and need to support up to 3A load on each channel at a time using a STM32 micro. I have a motion sensor whose pins are very close to the LED pins. It looks like the motion sensor wires are picking up EMI whenever the LEDs are pulsing at high loads. I need to shield my motion sensor wires from this EMI.
I tried to shield these wires and found that Cu foil works the best when I wrap these wires with it and connect the foil to the closest ground. Al foil helped but not to the same extent.
I also tried Cat5 shielded wire but it didn't help at all, guess it doesn't shield low frequency noise.
I am wondering if anyone could recommend a low cost shielded wire that I can use in a production environment.
Thank you so much in advance.
Regards,
Veeru
I hope everyone is staying safe and well in these tough times.
I have a PCB that is about 1" x 1" in size. It is a 4 layer board with a dedicated ground and power plane. I have 3 LED drivers that get pulsed at 5KHz and need to support up to 3A load on each channel at a time using a STM32 micro. I have a motion sensor whose pins are very close to the LED pins. It looks like the motion sensor wires are picking up EMI whenever the LEDs are pulsing at high loads. I need to shield my motion sensor wires from this EMI.
I tried to shield these wires and found that Cu foil works the best when I wrap these wires with it and connect the foil to the closest ground. Al foil helped but not to the same extent.
I also tried Cat5 shielded wire but it didn't help at all, guess it doesn't shield low frequency noise.
I am wondering if anyone could recommend a low cost shielded wire that I can use in a production environment.
Thank you so much in advance.
Regards,
Veeru