500W MOSFET Amplifier Circuit | B&K Components ST3030

Introduction

The 500W MOSFET Amplifier Circuit B&K Components ST3030 is a high-power audio amplifier renowned for its exceptional performance and reliability. This article explores the circuit diagram of the amplifier, highlighting the key components used in each section. The output section employs 2SK1058 and 2SJ162 MOSFET transistors, the driver section incorporates 2N5416 and 2N3440 transistors, and the preamplifier section feature 2N5087 and 2N5210 transistors. By understanding the specifications and characteristics of these transistors, we can appreciate the design choices made in this powerful amplifier.

Specifications of Transistors:

1. 2SK1058:

• Maximum Drain-Source Voltage: 160V
• Continuous Drain Current: 8A
• Total Power Dissipation: 70W
• Gate-Source Threshold Voltage: 3V
• Drain-Source On-Resistance: 1.5Ω

2. 2SJ162:

• Maximum Drain-Source Voltage: 160V
• Continuous Drain Current: 8A
• Total Power Dissipation: 60W
• Gate-Source Threshold Voltage: -3 to -5V
• Drain-Source On-Resistance: 1.2Ω

3. 2N5416:

• Maximum Collector-Base Voltage: 160V
• Maximum Collector Current: 1A
• Maximum Power Dissipation: 1.2W
• DC Current Gain: 25 to 75
• Transition Frequency: 100MHz

4. 2N3440:

• Maximum Collector-Base Voltage: 100V
• Maximum Collector Current: 1.5A
• Maximum Power Dissipation: 1.2W
• DC Current Gain: 100 to 300
• Transition Frequency: 300MHz

5. 2N5087:

• Maximum Collector-Emitter Voltage: 20V
• Maximum Collector Current: 50mA
• Maximum Power Dissipation: 600mW
• DC Current Gain: 160 to 800
• Transition Frequency: 100MHz

6. 2N5210:

• Maximum Collector-Emitter Voltage: 30V
• Maximum Collector Current: 100mA
• Maximum Power Dissipation: 500mW
• DC Current Gain: 100 to 300
• Transition Frequency: 300MHz

500W MOSFET Amplifier Circuit Diagram of B&K Components ST3030

This project can be built using a few basic components. The circuit diagram of this project is shown below.

Caution: Website contains information on high voltage circuits. Proceed at your own risk, ensuring proper knowledge and precautionary measures to prevent electric shock or injury.

More Circuit Layouts

MOSFETs Pinout

Parts List of 500W MOSFET Amplifier Circuit | B&K Components ST3030

Following is the list of all components used in this project:

• 2SK1058 MOSFET x 5
• 2SJ162 MOSFET x 5
• 2N5416 Transistor x 1
• 2N3440 Transistor x 1
• 2N5087 Transistor x 2
• 2N5210 Transistor x 6
• 1N4751 Zener Diode x 1
• ±70V Symmetrical Power Supply

Explanation of 500W MOSFET Amplifier Circuit B&K Components ST3030

The 500W MOSFET Amplifier Circuit B&K Components ST3030 is equipped with a robust power output stage that can deliver up to 500W of clear and undistorted audio. At the heart of this stage, the 5 pairs of 2SK1058 and 2SJ162 MOSFET transistors form a potent combination capable of handling significant power levels without compromising sound quality. These MOSFETs offer excellent thermal stability, ensuring reliable operation even under demanding conditions. Their low crossover distortion and high gain enable the amplifier to reproduce audio signals with utmost fidelity.

Moving up the chain, the driver section utilizes 2N5416 and 2N3440 transistors. These transistors act as intermediaries between the preamplifier stage and the output stage, providing the necessary signal amplification to drive the power transistors efficiently. The 2N5416 and 2N3440 transistors, known for their high gain and low noise characteristics, enable the amplifier to accurately reproduce subtle nuances in the audio signal without introducing any unwanted distortion. This results in a clearer and more immersive listening experience for the users.

In the preamplifier section, the 2N5087 and 2N5210 transistors play a crucial role in conditioning the incoming audio signal. These transistors are responsible for amplifying the weak signal from audio sources such as CD players, turntables, or musical instruments to a level suitable for further amplification in the driver and output stages. The 2N5087 and 2N5210 transistors offer high current gain, low noise, and low distortion, ensuring that the original audio signal remains intact throughout the amplification process.

Conclusion

The 500W MOSFET Amplifier Circuit B&K Components ST3030 incorporates a well-designed circuitry using high-quality transistors in each section. The 2SK1058 and 2SJ162 MOSFET transistors in the output section, 2N5416 and 2N3440 transistors in the driver section, and 2N5087 and 2N5210 transistors in the preamplifier section work harmoniously to deliver exceptional audio performance. The careful selection of these transistors, with their specific specifications and characteristics, ensures that the amplifier produces precise, powerful, and distortion-free sound. This power-packed amplifier stands as a testament to B&K Components’ commitment to delivering high-fidelity audio reproduction for discerning audiophiles.

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