Part Number: TPA6130A2
Hello TI,
I made a minor change to an existing PCB to optimise the audio performance and lower power consumption. The main thing I did was replace a discrete amplifier made up of op-amps and transistors with the TPA6130A2RTJR.
I had a look at the "TPA6130A2EVM Schematic" while designing and noticed R11 and R13 in Figure 8 are 220R, but in the BOM they are 0R jumpers. I assumed 0R is correct , and the 220R is just a mistake.
I therefore didn't place any resistors in the output path from the amplifier to the jack, as I was keen on not limiting the maximum volume the 8 Ohm stereo headphone could deliver.
We chose this "SJ-3506-SMT-TR" headphone jack, but we didn't use the switches, as the headphone jack sits on a separate assembly and the wire connecting them doesn't allow for additional signals.
Now we are facing this issue: While music is playing, even at low volumes, when plugging in and out the headphones play back a very distorted and extremely loud noise.
I understand that the plug might get short-circuited by the jack on insertion, but I was expecting the advertised "Advanced Pop and Click Suppression Circuitry" to take care of exactly that issue.
Do you have any advice for me? Do I need to add current limiting resistors? If yes, what value resistor at the minimum? Does the "Advanced Pop and Click Suppression Circuitry" require those resistors to properly work?
Many thanks!
