New here, noob about electronics. I am in a bit of concern, I caused the minus and plus to touch on the source that powers my amplifier with two channels (TDA2040 transistors). After that short, one of the channels sounds less loud than the other. Though in the specs is mentioned that these transistors have a built in short circuit protection.
Could it be damaged?
And if I may need to change one of them, could I better change them both with TDA2050, on the same board without changing other components there?
And a third question, I'm trying to make sure if I did well putting a diode on the 'minus' coming from the power source to the amp so the current to flow from the minus away, but not towards the amp. It is a voltage marge to affect that diode, at a 18V power supply? Did it impede the proper tension to fill into the whole circuit beyond the diode's limitation (I don't know exactly how a diode function, I know that a LED has a voltage limitation that's why I presume any diode must have one)?
Thanks a lot for any suggestions/explanations. Good day.
Does anybody know what is the difference between TDA2040, and TDA2040A? Thanks.
Best Answer
(1) Could it be damaged?
Yes. The fact that one channel is now much quieter than it was before would indicate that damage has been done somewhere in the circuit, though not necessarily in the IC.
(2) could I better change them both with TDA2050?
(3) putting a diode in the supply feed
Swapping for a different amplifier is up to you. Comparing the tda2040 and 2050 circuits they are pin compatible but you may need to change a couple of RC values.
Adding diodes into the supply feeds would introduce a voltage drop. Depending upon current this would be in the range 1-2V for each diode.