Today I will share a power amplifier circuit entitled 100W Power Amplifier TIP142 / TIP147. Power Amplifier is so powerful, with 100Watt RMS power output at 8Ohm impedance, and has 150Watt RMS power output at 4Ohm impedance. The power amplifier circuit is capable of lifting 12Inch speakers with 200Watt 8Ohm power, both used for mid, midbass and subwoofer.
Below the Circuit Diagram and PCB Layout Design:
In the scheme, the final transistor used TIP142 / TIP147, for the transistor datasheet you can find at datasheet file-base. The transistor has an NPN / PNP Darlington construction, so it has a stronger reinforcement. For buffer and driver circuit I use Transistor BC556AP PNP Transistor and TIP41 NPN transistor. For the installation of the driver transistor (TIP41) it is recommended to install the cooler with the final transistor, this works also for Thermo switch.
PCB Layout Design: