power amplifire circuit

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pritam9208

ACH]

Hi,I am going to make this amplifier but I want to know the wattage of the speaker which is 6 ohm speaker..

+vcc and -vcc is 6v battery.
Vin is audio Jack connected to phone using Signal Generator app on phone.

So I want to know the wattage of 6 ohm speaker..

View attachment RSELS08338-1.pdf

View attachment RSELS11220-1.pdf

View attachment CD00000501.pdf.zip
I also attached the main parts datasheets..

Last edited:

JonSnell Electronic

Have you considered crossover distortion? You have no bias for the output transistors.

Ketje

You loose say 1V from the Vbe and Opamp, gives 5Vtop on 6Ω.
Current top 5/6 A. For a square wave that is 5 x 5/6 = 4 1/6 W and sine wave half of that.
Mona

Sorento

Theoretical max output power for class-b push-pull is Pa=(V*V)/(8*R)
so if your voltage is +6V / -6V then Pa max = (12*12)/(8*6) = 3 W

AndrewT

Theoretical max output power for class-b push-pull is Pa=(V*V)/(8*R)
so if your voltage is +6V / -6V then Pa max = (12*12)/(8*6) = 3 W
I think it's even lower than that.
The maximum AC output voltage is ~1/3rd of the rail to rail voltage into higher impedance loads.

with a ±6Vdc supply the maximum output will be ~4Vac and more likely around 3.5Vac
Maximum Output Power = Vac²/Rload = 4*4/8 = 2W into 8ohms