i'm making a power amp to drive an 8-ohm speaker and reach the output of 50w. The datasheet says that it needs +-30v. Would the power amp reach the 50w output with just a single Vcc?
I've decided to use a dual supply for the vcc. I'm planning to do it with lm317 and lm337. These two regulators has about the output of 1.5 A. This current isn't harmful for my power amp right? And btw, can a 220v to 12-0-12v step down transformer be used to attain an output voltage of +-30v using lm317 nd lm337 or am i to look for a transformer with higher voltage ouptut? Tnx in advance...
This is the power amp that i'm gong to use: http://www.datasheetcatalog.org/datasheet/stmicroelectronics/1565.pdf
You don't need regulators for a power amp, and a 12-0-12 transformer is too low even without regulators - the datasheet normally specifies the voltage for the transformer you need (20-0-20 or 22-0-22 probably).
Feel free, but I fail to see why you would want to restrict the design, plus pay more for a larger transformer, capacitors etc. - bear in mind you need these considerably larger to compensate for the losses in the regulator.
Yes, you don't need or want the regulator. The amplifier regulates it's output by comparing it to it's input anyway, so it's redundant, and just more things to go wrong and generate heat.
I see. So it will just be a 3A 24-0-24 transformer filtered by some caps connected to my power amps +-Vcc right? Would that be ok or am i missing something important?
The datasheet is saying that the quiescent current of tda7295 is typically 30mA. Is this the minimum requirement of the current that i would supply? Cause i think i can use a smaller transformer for that purpose.. tnx in advance..
The datasheet is saying that the quiescent current of tda7295 is typically 30mA. Is this the minimum requirement of the current that i would supply? Cause i think i can use a smaller transformer for that purpose.. tnx in advance..