Other Parts Discussed in Thread: , TAS5751M
I got my TAS5733L eval kit in the mail a couple days ago and I’m working on figuring out how this works. I’ve run into a couple problems that I’ve posted about on the TI E2E forum, but I wanted to reach out to you because I think you’ll be more helpful!
So my first one is pretty simple. I cannot switch from the USB audio source to line in audio. The purepath SW has an Audio I/O page where you can select the input source. When I select Line in it says, “Line in successfully changed” and then audio continues to play over USB. I can’t get Coax audio to work either.
The next one is a little more complicated. I cannot get 8W out of this amplifier.
My set up for this is a 2x8W system using 6ohm drivers. I have two 6ohm dummy loads hooked up to the amplifier and my voltage rail is set at 10V. The power supply can supply up to 4A, so I don’t think that Is the limiting factor. I do not have the limiters enabled, so I don’t think it’s that either. When I have the amplifier volume set to 0dB, I’m getting about 8W per channel. If I increase the master volume to +1.5dB then the amplifier starts to intermittently output 8W and .01W. It cycles between these outputs about 5times per second. From the data sheet, at 10V 6ohms, I should be getting 8W output at about 10% THD. When I get a reading at 8W, the THD is 2%, which is much lower than what the datasheet says. This leads me to believe that the problem lies somewhere in my initialization of the board, not in the power limitations of the amplifier.