| poynton |
Hello All. :wave:
I found the following cicuit which I would like to use.
Could a power amp such as TDA2040 [ or 2030/2050 ] be used?
Or can anyone suggest an alternative opamp?
thanks.
Andy |
|
|
| Wynand |
If the reason that you want to use this circuit is because you want +-15v from a higher voltage(like the rails of a amp) why not look at this: project #102 from ESP
http://www.sound.westhost.com/project102.htm
You can still regulate it afterwards |
|
|
| steinchen |
more than 20V across the regulators will produce a huge amount of heat, I'd rather pick a transformer with 18V secondaries, 3V across the regs is sufficient
how many amps does your TDA2040 amp draw ? |
|
|
| poynton |
| quote: | Originally posted by steinchen
more than 20V across the regulators will produce a huge amount of heat, I'd rather pick a transformer with 18V secondaries, 3V across the regs is sufficient
how many amps does your TDA2040 amp draw ? |
Hi.
To avoid confusion...
I intend to use the psu to provide +-12v at about 0.25 - 0.5a max and in single end mode +5v at 0.35A.
I have a stack of the TDA2040 chips and as they basically are a form of op-amp, could they be used in place of the power opamp in the diagram?
I have been told that this type of psu gives low noise - true?
Transformer voltages, preregulators will be adjusted accordingly.
Andy |
|
|
| consort_ee_um |
The TDA2040 will be unstable because of the low gain needed.
Why not use a 7812 and 7912? |
|
|
|
