tda2822m problems...

[pat allen]

Hi group, i would like some inputs about this:
i try to use their(ST) suggested bridged test circuit on a TDA2822m and i get very poor performance. It doesnt play bridged at all, one channel is barely getting anything out of it...if i ask the circuit to play a bit more it start to pop pop pop, and eventualy stop to work, i need to unpower it all.
There is no DC at the input, i have a 10uf decoupling cap (along with the 10k input resistor to gnd).

When i look at it it feels to me like a connection is missing, or a feedback from amp #1 to amp #2...
Each channels play OK in mono mode so it is not toasted.

This is meant to power up a white noise self unit for sleeping aid (dont ask further).
I got a bag of them for free and i thought i could use one in this project,
thanks for any inputs.

[pat allen]

i found this variation of the bridged circuit...
(i dont know if the image will show up)

[pacificblue]

The feedback should come through C1, which forms a voltage divider with C2. You should check C1, if you don't get any feedback on pin 5.

The amp in post #1 is AC coupled, the amp in post #2 is DC coupled. Depends on the value of the speakers, whether you want to try #2.