Hi I am in need of some help in minimizing EMC and conducted emissions.
The TPA3112D1 is a Class D Audio Amp that has its output switching at approx 310kHz. My aim is to reduce the amplitude of the fundamental and harmonics that appear when testing conducted emissions.
** My current layout has the TPA3112D1 amplifier output LC filters (15uH & 2.2uF) located immediately adjacent to the Amplifier. The tracks are then routed along the outside (Periphery) of the board to a connector on the opposite side of the PCB (10 cm away) Note that there is no Gnd plane within 10mm of these signals.
Q. Can/Should I route the speaker TRACKS under/over/between Gnd plane of the PCB to the other side of the PCB instead where the connector Jack is?
** FYI my power supply has had a Common and Differential chokes added to the input supply voltage (12Vdc) to minimize conducted emissions. This may have an affect on your response.
See attachment.
I am happy to take feedback on the above circuit in relation to EMC performance.
Any help on EMC best practice would be greatly appreciated.
Regards DanielTPA3112D1 Block.pdf
