This incredibly small stereo amplifier is surprisingly powerful - able to deliver 2 x 3.7W channels into 3 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC.
keeleon wrote:I bought a Stereo 3.7W Class D Audio Amplifier - MAX98306 and have it connected to a 6xAA batter pack. I have a 1/8 jack I found in an old speaker wired to the inputs. I am only trying to get one speakers to work on one channel (however, it ONLY works on I believe the right side...) I thought I would be cool and hot glue the whole contraption to a piece of plastic to make a tiny portable amplifier. So the first question is: IS hot glue conductive? I thought it should be ok to attach on the back of PCB boards.
I have had it working off and on, and I think there might have been some cutting out due to a loose connection. But I have verified all the connections to the best of my ability, and everything seems to pass through. The speaker I am using shows 3.5 ohms when I measured it, and the power coming into the amplifier is around 7v. Is that enough? I'd hate to think my batteries are dying since I've barely used it at all.
The other thing is, I read that the amplifier is supposed to be "low heat", but when it is on, it is incredibly hot to the touch in the middle. Like if I held it, it would give me a burn. It has also melted all of the hot glue, so, so much for that connection method >.< Should it get that hot?
Where should I start testing to see what the problem is? Should there be voltage coming out of the speaker outs or something?
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