2 channel 100W min AF Power Amplifier STK4231II

To create a 100-watt OCL audio amplifier circuit, consider using this design. It incorporates the STK4231 integrated circuit, which is a compact and cost-effective solution. The STK4231 is a hybrid IC from Sanyo, belonging to the STK4201II series, capable of delivering a high power output of 100 watts per channel. When connected to a bridge adapter, the total output can reach approximately 400 watts, which is impressive.

The 100-watt OCL (Output Capacitor-Less) audio amplifier circuit utilizing the STK4231 IC is designed for high efficiency and performance in audio applications. The circuit configuration typically includes a power supply unit, input stage, gain stage, and output stage, where the STK4231 serves as the core amplification component.

The power supply should provide a dual voltage output, typically ±35V to ±40V, to ensure adequate headroom for the amplifier. The input stage consists of capacitive coupling to block any DC offset from the source, ensuring that only the audio signal is amplified. This stage may also include a potentiometer for volume control.

The gain stage is crucial for amplifying the weak audio signal from the input stage. The STK4231 IC integrates several transistors and other components to achieve a high gain while minimizing distortion. The output stage directly drives the speakers, and the OCL configuration eliminates the need for output coupling capacitors, thus improving frequency response and reducing phase shift.

In a bridge configuration, two STK4231 amplifiers are used, allowing for increased power output. This connection effectively doubles the voltage swing across the speaker load, resulting in a total output power of around 400 watts. Proper heat dissipation measures, such as heatsinks, should be implemented to manage the thermal load generated during operation.

Overall, this amplifier circuit is suitable for high-power audio applications, providing clean and powerful sound reproduction while maintaining efficiency and compactness.If you want to create the 100 watt OCL audio amplifier circuit. I want you to consider this circuit as one. It uses STK4231 IC products to create a simple, small and best economical. The STK4231 is Hybrid IC of Sanyo, in the family of STK4201II. Can provide a high power output to 100 watts per channel. And When connected to the bridge adapter with output altitude of about 400 watts is incredible. 🔗 External reference