In this project, I will share about class-d power amplifier using TL494 IC for PWM, and use N-Channel MOSFET transistor as the final amplifier. This circuit is not so complicated and cheap to make practice making power amplifier class-d. This power amplifier circuit can be supplied with 30V to 100V DC asymmetric power supply using 8VDC bias voltage up to 12VDC. For the output power of this amplifier can generate power up to 500Watt, pretty good is not it? to make this power amplifier please see the circuit schematic of TL494 Power Amplifier below along with PCB Layout design that you can download in the form of .PDF format.
C7, C9, C10=220uF-1000uF/100V
C11, C12= 1uF - 4u7F / 400V
Q4, Q5= IRF540, IRF460, IRF250, IRF 4227 N-Channel Mosfet
U1= TL494, TL494CN
L1= 22uH - 35uH
J1= Audio input
J2= Bias Voltage 8-12V
J3= +V 30- 100V DC
J4= Speaker Output
Below the PCB Layout Design for Power Amplifier Class-D TL494, You can download and print the PDF file:
Download PCB.PDF: PCB Power Amplifier TL494
In the picture above is when PCB I etching using Ferichloride and shake it into the container. For more details, I will update the video complete making this class-d power amplifier using TL494.