70 Watt MOSFET Audio Amplifier


Posted on Feb 6, 2014

This simple power mosfet audio amplifier circuit, with TL071C and 2 MOSFETs (IRF9530 and IRF530) can deliver up to 45 Watts on 8 © speaker. This schematic is based on Siliconix application and on variations of voltage on the 2 resistors that are serial inserted on the voltage supplier of the operational amplifier driver. The MosFet transistor mus


70 Watt MOSFET Audio Amplifier
Click here to download the full size of the above Circuit.

t be mounted on a heatsink with at least 1K/W. Amplifier`s efficiency is 70%, distortions at cut frequency were at most 0. 2% at 20Hz on 8 © and 10W. With a power supply of ± 30V the mosfet audio amplifier can deliver 45W on 8 © and 70w on 4 ©. Remember that this audio amplifier is not protected on shortcircuits so everytime you switch on check to see if the speaker is connected.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Field, Crystals and capacitance meters schematics
    Universal wiper delay
    Tracking-adc
    Asymmetric Timers
    National LM386 Audio Power Amplifier Datasheet for Battery Operation
    Low-Power Car/Bike USB Charger
    Three-tone electronic doorbell 1
    PET Repair Model 4016
    Using LED lights do motor phase failure protection



    Top