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.
Tags:
Power Amplifier