Amplifier 120W RMS

[joseafonso88]

I made an amplifier of 120W RMS but need help to the power supply...

My amplifier is: www.amplificador120rms.blogspot.com

[Pentode]

A single TDA2052 is only rated at 40 Watts RMS into a 4 ohm load and 60 Watts music power, the recommended supply voltage is 22 volts + & -

This is easily achieved by using a centre tapped transformer, connecting a bridge rectifier to the out most ends of the secondary and taking the center tap of the secondary to the 0V or earth, this is the economical way of doing it.

This would call for 15-0-15 V secondary or one with two separate 15V windings. There are other configurations depending on the transformer. This will give you 30 x 1.414 = 42 total and 21v + & - because of the center tapped ground.

A 16-0-16V type would equally work but with this you are approaching the maximum DC supply limit of the device.

Davy