I am sorry if there is already a topic about it though, I searched and found nothing about it.
I bought 6 of these industrial pcb to mount the amplifier with tda7293
however, as soon as I turn on the pcb on the transformer CI explodes.
I am feeding with 35vdc symmetric.
i have lost 3 ICs
then i gave up
I'm using this board:
however
looking this pcb, I found that the capacitor tracks to choose which IC to use, are different ... this reversed, then I reversed the capacitor to the TDA7294 and the amplifier operated normally.
but the ic are very heating up then like to know if it is normal, it also heats without any load connected.
Finally, before reversing the capacitor I tested with a power source 12v symmetrical and the IC not exploded, left about 1 minute playing softly.
I think the screen printing of the pcb is wrong, this reversed.
Anyone with experience with this IC could help me?
sorry about my bad English and thanks for the help.
I bought 6 of these industrial pcb to mount the amplifier with tda7293
however, as soon as I turn on the pcb on the transformer CI explodes.
I am feeding with 35vdc symmetric.
i have lost 3 ICs
then i gave up
I'm using this board:
An externally hosted image should be here but it was not working when we last tested it.
however
looking this pcb, I found that the capacitor tracks to choose which IC to use, are different ... this reversed, then I reversed the capacitor to the TDA7294 and the amplifier operated normally.
An externally hosted image should be here but it was not working when we last tested it.
but the ic are very heating up then like to know if it is normal, it also heats without any load connected.
Finally, before reversing the capacitor I tested with a power source 12v symmetrical and the IC not exploded, left about 1 minute playing softly.
I think the screen printing of the pcb is wrong, this reversed.
Anyone with experience with this IC could help me?
sorry about my bad English and thanks for the help.
You have grounded the tab... to where.
Gajanan Phadte
you talk about the ground, the 4rd wire? or the center tap, of the transformer?
+V+ 35v
-v 35v
0v
ground
i am not using ground to earth
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