Hi All,
In a portable, battery powered design, we're using the TPA6203A1 audio amplifier to drive an 8 ohm speaker. It's set up using the application schematic shown in figure 30 of the data sheet. I've attached the section of the relevant schematic diagram.
The "DAC" input as shown is fed by the onboard DAC of the freescale MK20DX256VLH7, configured using in the internal voltage reference (and hence the output is biased at 1.2V / 2 = 0.6V).
However, we are finding that whilst initially the design works fine, after some time, the audio amplifier starts exhibiting artefacts and dips in volume, followed by ceasing working completely.
Any help would be greatly appreciated.