2x30W Stereo Audio Amplifier based STK465

This is the stereo audio amplifier circuit build based on well-known power chip of STK465. The STK465 has two power amplifier module, so, with single chip of STK465 you can build a stereo amplifier with two input channels and two output channels. This circuit is require split power supply, recommended supply : +/- 28V / 2A. The STK465 should be mounted on proper heatsink.

Schematic diagram:

Component Part list:

R1 = 1K C1 = 1uF/35V R2 = 3,3K C2 = 470pF R3 = 100 C3 = 100uF/60V R4 = 330 C4 = 100uF/60V R5 = 3,3K C5 = 10uF/60V R6 = 1K C6 = 47uF/60V

R7 = 0,33 C7 = 8,2pF R8 = 33k C8 = 0,1uF R9 = 4,7 C9 = 1uF/35V R10 = 1k C10 = 470pF R11 = 3,3k C11 = 100uF/60V R12 = 100 C12 = 100uF/60V

R13 = 330 C13 = 10uF/60V R14 = 3,3k C14 = 47uF/60V R15 = 1k C15 = 8,2pF R16 = 0,33 C16 = 0,1uF R17 = 33k R18 = 4,7 IC1 = STK465 LS1 = Speaker 40W 8 or 4 Ohm

PCB Layout:

Components placement:

Download STK465 datasheet.