T
treez
Guest
We have an offline, isolated LED driver in a plastic enclosure. Wires from the enclosure feed the LEDs which sit on MCPCB which is mounted on a big earthed heatsink.
Unfortunately this big LED heatsink has to be earthed for electrical safety reasons…but of course, this is a nuisance because it means that common mode noise can then more easily pervade due to the accessible earth near the LED driver.
I am wondering if the best way to counter this is to also have an earth connection to the offline LED driver PCB…and then have a common mode filter incorporating Y caps from live and neutral to this earth connection on the PCB?
Unfortunately this big LED heatsink has to be earthed for electrical safety reasons…but of course, this is a nuisance because it means that common mode noise can then more easily pervade due to the accessible earth near the LED driver.
I am wondering if the best way to counter this is to also have an earth connection to the offline LED driver PCB…and then have a common mode filter incorporating Y caps from live and neutral to this earth connection on the PCB?