This is the circuit diagram of 80W power audio amplifier based on power IC LM12. The circuit kit is sold at electronic part/component store, the design is proven to be valid and work. This amplifier use dual polarity power supply to operate.
Here the Amplifier Circuit Diagram:
Here the PCB layout:
About LM12:
The LM12 is a power op amp capable of driving +25V at +10A while operating from +30V supplies. The monolithic IC can deliver 80W of sine wave power into a 4X load with 0.01% distortion. Power bandwidth is 60 kHz. Further, a peak dissipation capability of 800W allows it to handle reactive loads such as transducers, actuators or small motors without derating. Important features include:
- Input protection
- Controlled turn on
- Thermal limiting
- Overvoltage shutdown
- Output-current limiting
- Dynamic safe-area protection
Download the LM12 datasheet from below link:
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