The Circuit Works
The complexity of the circuit is at an advanced level, it is not recommended for those who don't have experience in electronics and in assembling amplifier circuits, you must have minimal knowledge at an advanced level to assemble this type of power amplifier.
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Fig. 2 - Schematic diagram 440W Class AB Power Amplifier using Mosfet IRFP9240 and IRFP240 Transistors |
The Power Supply
In Figure 3 below, we have a suggestion for a power supply that we use in our projects. In this article, besides having the schematic diagram with the Printed Circuit Board, you will understand how to easily calculate your own Power Supply, with the desired voltage.
You can in the link below:
Fig. 3 - Symmetrical Power Supply for Power Amplifiers |
Components List
- Semiconductors
- U1 .......................... TL071 Integrated Circuit
- Q1 .......................... BD139 NPN Transistor
- Q2 .......................... BD140 PNP Transistor
- Q3, Q4, Q5, Q6 ..... IRFP9240 Mosfet Transistor
- Q7, Q8, Q9, Q10 ... IRFP240 Mosfet Transistor
- D1, D2 ................... 1N4744 15V Zener diode
D3, D4 ................... 1N4148 diode
- Resistor
- R1, R33 ................. 47KΩ (yellow, violet, orange, gold)
- R2 .......................... 1KΩ (brown, black, red, gold)
- R3, R4 .................... 2K7Ω (red, violet, red, gold)
- R5, R6 .................... 2KΩ (red, black, red, gold)
- R7 ........................... 6k8Ω Trimpot
- R8, R9 .................... 22KΩ (red, red, orange, gold)
- R10, R11 ................ 33Ω (orange, orange, black, gold)
- R12, R13 ................ 220Ω (red, red, brown, gold)
- R14, R5 .................. 820Ω ( grey, red, brown, gold)
- R16 ......................... 3.3Ω (orange, orange, gold, gold)
- R17, R18, R21, R22, R25, R26, R29, R30 .... 39Ω (orange, white, black, gold)
- R19, R20, R23, R24, R27, R28, R31, R32 .... 5W 0.33Ω (orange, orange, silver, gold)
- Capacitor
- C1, C5 .................... 100pF Ceramic Capacitor
- C2, C6, C7 .............. 1uF Ceramic Capacitor
- C3, C4, C9, C10 ..... 470uF / 65V Electrolytic Capacitor
- C8 ........................... 100nF Ceramic Capacitor
- Miscellaneous
- P1 .......... 2-pin PCB soldering terminal blocks
- P2 .......... 3-pin PCB soldering terminal blocks
- Others .... Printed Circuit Board, heat sink, wires, etc.
- Semiconductors
- U1 .......................... TL071 Integrated Circuit
- Q1 .......................... BD139 NPN Transistor
- Q2 .......................... BD140 PNP Transistor
- Q3, Q4, Q5, Q6 ..... IRFP9240 Mosfet Transistor
- Q7, Q8, Q9, Q10 ... IRFP240 Mosfet Transistor
- D1, D2 ................... 1N4744 15V Zener diode
D3, D4 ................... 1N4148 diode - Resistor
- R1, R33 ................. 47KΩ (yellow, violet, orange, gold)
- R2 .......................... 1KΩ (brown, black, red, gold)
- R3, R4 .................... 2K7Ω (red, violet, red, gold)
- R5, R6 .................... 2KΩ (red, black, red, gold)
- R7 ........................... 6k8Ω Trimpot
- R8, R9 .................... 22KΩ (red, red, orange, gold)
- R10, R11 ................ 33Ω (orange, orange, black, gold)
- R12, R13 ................ 220Ω (red, red, brown, gold)
- R14, R5 .................. 820Ω ( grey, red, brown, gold)
- R16 ......................... 3.3Ω (orange, orange, gold, gold)
- R17, R18, R21, R22, R25, R26, R29, R30 .... 39Ω (orange, white, black, gold)
- R19, R20, R23, R24, R27, R28, R31, R32 .... 5W 0.33Ω (orange, orange, silver, gold)
- Capacitor
- C1, C5 .................... 100pF Ceramic Capacitor
- C2, C6, C7 .............. 1uF Ceramic Capacitor
- C3, C4, C9, C10 ..... 470uF / 65V Electrolytic Capacitor
- C8 ........................... 100nF Ceramic Capacitor
- Miscellaneous
- P1 .......... 2-pin PCB soldering terminal blocks
- P2 .......... 3-pin PCB soldering terminal blocks
- Others .... Printed Circuit Board, heat sink, wires, etc.
Fig. 3 - 440W Class AB Power Amplifier using Mosfet IRFP9240 and IRFP240 Transistors |
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