Build a power amplifier circuit using 2N3055 NPN transistors. The speciality of this circuit diagram is that the input working voltage is in a single supply. You can give the input DC voltage of 12v to 24 V. This 12 volt 2N3055 transistor amplifier circuit diagram will help you to build your own Hi-Fi audio system at home.
Circuit Diagram
In this circuit a few number of electronics components are used to build this power audio amplifier. The maximum output wattage from this audio amplifier is about 100 watt Rms at 4 ohm speakers. This circuit is suitable for the car audio amplifier and also the Mp3 audio player.
The main speciality of this amplifier is the single power supply. The amplifier circuit will work fine with a 12v DC input. So you can directly connect with a 12v Battery or a transformer.
Components Required
- 2N3055 NPN transistor – 4
- 2N3904 transistor – 1
- 2N3906 PNP transistor – 1
- 0.33 ohms 1 watt resistor – 4
- 4700 uf 25v Capacitor – 1
- 1uf/63v capacitor – 1
- 1N4001 or 1N4007 diode – 2
- 2.2k resistor – 2
- 47 ohms resistor – 2
- 470 ohms resistor – 1
- 100 ohms -1
- 15 ohms – 1
2N3055 Transistor Pinout
2N3055 Transistor Characteristics
| Parameter | Specification |
| Type | NPN BJT |
| Maximum Collector-Base Voltage (VCB) | Typically around 100V |
| Maximum Collector-Emitter Voltage (VCE) | Typically around 60V |
| Maximum Collector Current (IC) | Usually rated at 15A |
| Power Dissipation (PD) | Typically around 115W |
| Transition Frequency (fT) | Typically in the range of MHz |
| DC Current Gain (Hfe) | Typically in the range of 20 to 70 |
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