![]() |
PCB 100W Power Amplifier - TIP142 and TIP147 Transistors |
This is a low complexity amplifier, which can be easily assembled by anyone who has basic knowledge in electronics.
This amplifier works with a Class B output stage with a complementary output pair formed by the TIP142 and TIP147 Darlington Transistors.
⏯️ Operation
The input stage, is formed by a differential pair Q1 and Q2, which are two PNPs A733 transistors, the Q1 transistor receive the input signal for amplification, and Q2 receives the Feedback signal.
Thus assembling a signal loop making with the differential amplifier to control the signal giving stability to the amplifier and avoiding distortion in the circuit.
The second stage consists of a TIP41 transistor, which functions as a Drive, which receives the signal from the differential pair and amplifies it to delivery a sufficient current at the base of the output transistors.
Diodes D1, D2 and D3 determine the base polarization voltage in the transistors.
This amplifier has an output power of approximately 100 watts, to get this output power will depend on the Power Supply voltage, with a supply voltage of + 50V / - 50V, with a current of 3A.
🔌 The Circuit
In our tests, it was possible to get a little more than 100W. The schematic diagram circuit, is in Figure 2 below, it is a very simple circuit to build, with few external components.
However, be careful, it works with a total voltage of 90V, be careful not to change any component polarity, don't short the amplifier circuit.
![]() |
Fig 2 - Schematic Simple 100W Power Amplifier with TIP142 NPN and TIP147 PNP transistors |
You might also be interested in:
- Build a 50W RMS Audio Amplifier with Mosfet | Complete DIY Guide
- 400W Class AB Amplifier using MJL4281A and MJL4302A transistors + PCB
- 200W RMS Power Amplifier With 2SC2500 AND 2SA1943 + PCB
- 300W RMS Power Amplifier - 2SC3858 and 2SA1494 Transistors + PCB
- 50W RMS Audio Amplifier with IRF530 and IRF9530 Mosfet + PCB
- 100W RMS Power Amplifier With 2 NPN 2SC5200 Transistors At Output + PCB
- Simple 3 Transistors Power Amplifier push a 600W RMS Subwoofer + PCB
⚡Power Supply
🧾 Components List
- Semiconductor
- Q1, Q2 .... A733 - PNP transistor
- Q3 ........... TIP41C - NPN transistor
- Q4 ........... TIP142 - NPN power transistor
- Q5 ............TIP147 - PNP power transistor
- D1, D2 .... 1N4007 - Diode
- Resistors
- R1, R2 ..... 22K ohms - 1/8W - Resistor - (red, red, orange, gold)
- R3 ........... 1K5 ohms - 1/8W - Resistor - (brown, green, red, gold)
- R4 ........... 220 ohms - 1/8W - Resistor - (red, red, brown, gold)
- R5 ........... 27K ohms - 1/8W - Resistor - (red, violet, orange, gold)
- R6 ........... 27 ohms - 1/8W - Resistor - (red, violet, black, gold)
- R7, R8 .... 3K3 ohms - 1W - Resistor - (orange, orange, red, gold)
- R9, R10 ... 022 ohms - 3W - Resistor - (red, red, gold, silver)
- Capacitors
- C1 .......... 2.2uF - 25V - Electrolytic capacitor
- C2 .......... 100uF - 63V - Electrolytic capacitor
- C3 .......... 10uF - 63V - Electrolytic capacitor
- Miscellaneous
- P1, P2 ..... Block 5mm 2 Pin weldable terminal Connector
- P3 ........... Block 5mm 3 Pin weldable terminal Connector
- Others .... Printed Circuit Board, Wires, Solders, Etc.
🖨️ Printed Circuit Board (PCB)
We are offering the PCI - Printed Circuit Board, in GERBER, PDF and PNG files, for you who want to do the most optimized assembly, either at home.
If you prefer in a company that develops the board, you can is downloading and make the files in the Download option below.
📥 Files to download, Direct Link:
Click on the link beside: GERBER, PDF and PNG files
👋 I hope you enjoyed it!!!
If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.
🙏 Subscribe to our blog!!! Click here - elcircuits.com!!!
My Best Regards!!!
Hola buenas tardes, armé el circuito y cuando le puse voltaje se quemó la resistencia de 27 ohm
ReplyDelete