Class AB Audio Power Amplifier 2 Watt




Class AB Audio Power Amplifier 2 Watt

This simple circuit shows Class AB Audio Power Amplifier which powered at 2 watt.

The single 470R preset resistor, PR1 controls the quiescent current flowing through the BD139/140 complimentary output transistors. 

The frequency response is flat from 20Hz to 100kHz:

Current is about 15 mA rising to 150 mA with a 50 mV input signal. 





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