500W RMS power amplifier circuit design based on MOSFET

This is a 500WRMS power amplifier circuit design based on MOSFET. This circuit is very popular among EE audio enthusiasts as "LEGENDstageMasterMK2". This is a very good and powerful amplifier. It uses 12x power MOSFETIRFP240.

In order to achieve greater power, their often interested younger friends developed a more powerful version, capable of producing a full, true 500WRMS into 8 ohms. Such a big power had to resort to somewhat completely different solutions for better reliability or to increase the complexity of the tiles, so it is impossible for this version to use the same tiles as the previous two lower models ( Legend and Legend Stage Master).

Specification:

Output power——500WRMS/8ohms

Frequency range 15Hz-130kHz (-1dB) at30WRMS

THD=《0.18%（at1kHzand500W）

THD=《0.01%（at1kHzand400Wandbelowthispower）

BIAS per output pair is approximately 25mA

500WRMS power amplifier PCB design and layout

It's PCB design and component placement, you should mount the MOSFET on a heat sink to prevent overheating and maintain the performance of the power amplifier.

This circuit was designed by Dr. Borivoje Jagodic, the original page is for reference.