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Efficiency is power out divided by power in.
If the amplifier is single-ended then the voltage across the speaker is about 10V p-p and the output power is calculated to be only 1.56W.
If the amplifier is bridged then the voltage across the speaker is about 18V p-p and the output power is calculated to be about 5.1W.
hey! i think something is wrong supply voltage is 12V.
my design is full bridge configuration.
supply voltage is 12V from battery and 8 ohm speaker.
amplifier type is switching amplifier with pwm modulation technique.
i want to know the measuring methods of efficiency in this type of amplifier.
efficiency measurement:
First,you have to test the power dissipation on the 8ohm load.Because your output is PWM signal,so first you have to filter the signal to sine wave.then test the output signal amplitude on the Rload.
Or else you use Audio Precision to test the output power directly.
Second,you have to test the average current flow through the power supply.This is called power in.
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