Power Supply for Amp.

[hernanstafe]

Ok i've just built an amp using TDA2030 IC, i used the single power supply version of the circuit tanken off the component Datasheet. Now, i've tested it with a computer power supply and it works ok, but i'd like to build a power supply for it but if i use a common one, i get a horrible sound, so i take it it has to be very very filtered if not regulated (if i'm not wrong, it has to have very small ripple...)any schematics for such thing? cause i thought using LM7812 to regulate and capacitors to filter but i'm not sure if it'll be enough.
Thanks again everyone!

[AndrewT]

Hi,
most decent chipamps have adequate Power Supply Rejection Ratio (PSRR) to hide the small ripple at quiescent conditions and to hide the big ripple when delivering significant output current.

A conventional unregulated PSU consisting of just a transformer + rectifier + smoothing cap is usually enough for a single supply ?Vdc to 0Vdc.

Be careful to ensure the maximum voltage from your PSU is less than the absolute maximum Chipamp voltage requirement.

[ouxly40]

The 78xx series regulators are easy, stable and reliable. They however, are not so good at rapidly changing current draw. You want to use a series pass regulator. You may also try a much larger filter cap on the one you have.