Hello to all,
I built a prototype of the amplifier with circuit TAS5630.
I used a total of 3 circuits TAS5630 for 5.1 channel sound. Differential outputs are interference-free, beautifully clean sound.
But, by SE Outputs is heard a audible noise (around 1kHz). Wenn I touch the heatsink, the audible noise is lower, but always heard.
I´m using one heatsink for all 3 ICs, but separate with the thermal insulating foil.
Questions:
- Must be Heatsink connected with GND? (I have connected GND with PE over USB)
- Are the cooling areas from TAS5630 connected with GND or similar?
- Any other idea, why is the audible noiese presented?
best regards, Radim.