The article is being published in collaboration with JLCPCB. They supply high quality PCBs at a very reasonable price. They also can provide SMT circuit assembly.

We thanks to our sponsor JLCPCB for sponsoring us PCBs for this project circuit.

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The project about making an amplifier circuit using TDA-2050 sound IC. If you want to make a HI-FI power amplifier circuit, then you should use TDA-2050. The TDA2050 is a great sounding chip amplifier with lots of power The IC can output about 30 watts or 75 watts at 8 ohms loudspeaker.

The TDA 2050 is a monolithic integrated circuit in a Pentawatt package, intended for use as an audio class-AB audio amplifier. The sound IC can be used in stereo or mono audio design circuits.

The amplifier can output upto 5A current to drive speakers without any damage. It can also handle short circuits in both AC and DC rail without killing itself. This makes it robust to be used in automotive audio designs. The TDA2050 is breadboard friendly and hence can be easily tested using a breadboard.

Component List - 

To make this amplifier circuit, we need some simple electronics component. You also can order assembled PCBs form JLCPCB. JLCPCB have its parts library. To check JLCPCB parts library, click here -

All Component list have to been given below –

Component List –

• Sound IC – TDA 2050

• Capacitor - 200µf / 25v *2 and 1µf / 50v

• Polyester Film Capacitor – 2A 104J

• Resistor – 18 K Ω*2, 2.2 Ω, 680 Ω


• Speaker

• Power Source – DC 12v

Output of TDA-2050 Sound IC -

• Non – Inverting Input

• Inverting Input

• Ground

• Output

• Supply Voltage

Feature of TDA-2050 Sound IC -

• High output power (50 W music power IEC 268.3 rules)

• High operating supply voltage (50 V)

• Single or split supply operations

• Very low distortion

• Short-circuit protection (OUT to GND)

• Thermal shutdown

• Voltage Gain: 80dB

• Supply Voltage rejection: 45dB

• Short circuit and thermal protection is available

• Breadboard friendly

• Available in 5-pin TO220 package

Applications of TDA-2050 Sound IC - 

• Used for Audio signal Amplification

• Suitable for high power amplification

• Capable of operating on dual/split power supply

• Can be used to cascade audio speakers

Schematics and PCB Design - 

The schematics of PCBs can be seen above.

Hardware of this Amplifier Circuit - 

To make this amplifier circuit, we might need some electronics component. JLCPCB has its own parts library. JLCPCB has 200k+ in stock components, 24 hours rapid SMT assembly.

You can check SMT parts library here -

Connect Resistor with the Circuit - 

To make this mono amplifier circuit, 1st we connect resistor with the circuit. We connect 18 KΩ resistor with 1 no leg of this sound IC. Then connect 680 Ω resistor with 2 no of this sound IC and again 18 KΩ resistor with 4no leg of sound IC and it’s other terminal with 2no leg of Sound IC.

We also connect 2.2 Ω resistor with 4 no leg of sound IC. Our all resistor connection is complete.

Connect Capacitor with the Circuit - 

Now we connect 1µf / 50v capacitor positive leg with 1no leg of sound IC. Then connect 10µf / 50v capacitor positive leg with 680 Ω resistor and another 10µf / 50v capacitor positive leg with 2.2 Ω resistor. We connect one piece polyester film capacitor with 200µf / 25v capacitor. Then connect it’s negative terminal with 3no leg of sound IC.

Again we connect another polyester film capacitor with 220µf / 25v capacitor. Then connect it’s positive terminal with 5no leg of sound IC.

Connect Audio Input Cable - 

The 18 KΩ resistor was connected with 1no leg of sound...

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