160W HiFi MOSFET Amplifier Circuit Diagram

Introduction

The demand for high-fidelity audio amplifiers have increased over the years, as people strive for the best audio experience in their homes. One such amplifier that delivers exceptional performance is the 160W HiFi MOSFET Amplifier Circuit Diagram. This circuit utilizes different transistor types like 2SJ162, 2SK1058, 2SB649, 2SD669, and BC556B in various sections to ensure superior sound quality. In this article, we will discuss the circuit diagram and specifications of the transistors used in the output, driver, and preamplifier sections.

Transistor Specifications :

2SJ162:

• Drain-Source Voltage: 160V
• Continuous Drain Current: 7A
• Power Dissipation: 100W
• Total Gate Charge: 110nC
• Operating Frequency: 1MHz

2SK1058:

• Drain-Source Voltage: 160V
• Continuous Drain Current: 10A
• Power Dissipation: 100W
• Total Gate Charge: 170nC
• Operating Frequency: 1MHz

2SB649:

• Collector-Base Voltage: 80V
• Collector Current: 1.5A
• Power Dissipation: 1W
• Transition Frequency: 150MHz
• Gain: 100-900

2SD669:

• Collector-Base Voltage: 80V
• Collector Current: 1.5A
• Power Dissipation: 1W
• Transition Frequency: 150MHz
• Gain: 100-900

BC556B:

• Collector-Emitter Voltage: 65V
• Collector Current: 0.1A
• Power Dissipation: 0.5W
• Transition Frequency: 100MHz
• Gain: 110-800

160W HiFi MOSFET Amplifier Circuit Diagram

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.

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Components List of 160W HiFi MOSFET Amplifier Circuit Diagram

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

Transistors:

• 2SJ162 Transistor x 1 (Alternate: IRFP240, 2SK1530 or BUZ900DP)
• 2SK1058 Transistor x 1 (IRFP9240, 2SJ201 or BUZ905DP)
• 2SB649 Transistor x 2
• 2SD669 Transistor x 2
• BC556B Transistor x 4

Resisters:

• 0.47/5W Resister x 2
• 470/2W Resister x 2
• 10/3W Resister x 1
• 2.2k Resister x 1
• 22k Resister x 1
• 47k Resister x 1
• 470 Resister x 1
• 1k Resister x 4
• 3.9k Resister x 2
• 100 Resister x 3
• 10k Resister x 1
• 2.5k Trimmer x 1
• 100 Trimmer x 1

Capacitors:

• 2.2uF Capacitor x 1
• 470pF Capacitor x 1
• 47uF Capacitor x 2
• 104J Capacitor x 3
• 22pF Capacitor x 2
• 220uF Capacitor x 2

Explanation of 160W HiFi MOSFET Amplifier Circuit Diagram

The Output Section:

In the output section of the 160W HiFi MOSFET Amplifier Circuit Diagram, two transistors are employed: 2SJ162 and 2SK1058. You also can use alternative transistors instead, mentioned in the components list above. These are MOSFET transistors with excellent power capabilities and low distortion characteristics. These transistors, when properly biased and configured, ensure a clean and dynamic audio output.

The Driver Section:

For the driver section of this amplifier circuit, two complementary transistors are used: 2SB649 and 2SD669. These transistors are specifically designed for audio applications and provide excellent amplification and signal handling capabilities. In combination with the output transistors, they enable efficient power transfer and minimal signal degradation.

The Preamplifier Section:

To ensure optimal audio signal processing and amplification, the preamplifier section incorporates the BC556B transistor. This transistor, known for its low noise and high gain characteristics, enhances the weak input signal, preparing it for further amplification in the driver and output sections. The BC556B transistor plays a crucial role in preserving the original audio quality and delivering a rich and detailed sound output.

Conclusion

The 160W HiFi MOSFET Amplifier Circuit Diagram, utilizing 2SJ162, 2SK1058, 2SB649, 2SD669, and BC556B transistors, offers a high-quality audio amplification solution for audiophiles and enthusiasts. The careful selection of transistors in the output, driver, and preamplifier sections ensures optimal power handling, low distortion, and minimal signal degradation. With its exceptional performance and specifications, this circuit provides an immersive and immersive listening experience, making it a perfect choice for high-fidelity audio enthusiasts.

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