On a design using TPA6139A2 I noticed the device was getting too hot. Measuring the current consumption from a 5V supply (TPA6139A2 powered through a 5V to 3V3 linear regulator), I noticed it was suspiciously high (~330 mA), and no signal comes out (no load applied).
Then, I realized that all of the time I've had the /MUTE input floating. Directly connecting /MUTE to GND brings steadily the current down, still being rather high (~150 mA). Setting /MUTE to 3V3 did not bring any signal out, though.
Then, back to /MUTE connected to GND, I plugged a headphone, and the current consumption was so high (> 1A) that the linear 5V to 3V3 regulator was absolutely destroyed.
- Can /MUTE input floating be the reason for such misbehavior?
- Can someone please have a look at my schematic any spot any error, or provide some recommendation? (Please forget about X16, it has there just for measurement)
- Has somebody else experienced such issues?
- Given all the trouble reported on https://e2e.ti.com/support/audio/f/6/t/596843,