2 x 100W Stereo Power Amplifier with STK4231II

Here is the 2 x 100W stereo power amplifier with STK4231II as the main amplifier component. This is a high power audio amplifier with dual output channel at 100W max for each channel. I think it is a very good amplifier because it has capability to deliver high stereo output power with only use a single chip power IC.

Circuit Notes:

• This circuit using dual polarity power supply, please see the IC datasheet for the recommended power supply voltage.
• Mount the power IC on heatsink to prevent overheating on its.

Dual Polarity Power Supply Scheme Diagram:

Use 5A center tap transformer for maximum result. Change the capacitor with higher value (about 6800uf). Maximum voltage for the circuit is 75V, recommended voltage 51V.

STK4201II Features:

• The STK4201II series (STK4231II) and STK4201V series (high-grade type) are pin-compatible in the output range of 60W to 100W. Once the PCB pattern is designed, you can easily satisfy the requirements for new sets simply by changing the IC.
• Built-in muting circuit to cut off various kinds of pop noise
• Greatly reduced heat sink due to case temperature 125°C guaranteed
• Excellent cost performance

Download the power IC STK4231II datasheet document from the following link:
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Good luck…