How to Make Amplifier Circuit Using TDA-2050

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.

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 https://jlcpcb.com/RTA  for sponsoring us PCBs for this project circuit.

 For SMT Service, click here - https://cart.jlcpcb.com/quote?orderType=1&stencilLayer=2&stencilWidth=100&stencilLength=100&stencilCounts=5

Thanks To JLCPCB.

$2 for 1-4 Layer PCBs.

Get SMT Coupons - https://jlcpcb.com/RTA

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 - https://jlcpcb.com/parts

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
•      PCB
•      Speaker
•      Power Source – DC 12v

1.        Non – Inverting Input
2.        Inverting Input
3.        Ground
4.        Output
5.        Supply Voltage

•        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

•         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

The schematics of PCBs can be seen above.

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 - https://jlcpcb.com/parts

To make this mono amplifier circuit, 1^st 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.

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.

The 18 KΩ resistor was connected with 1no leg of sound IC, we connect it’s other terminal with 10µf / 50v capacitor negative leg and 220µf / 25v capacitor positive leg.

Now we need to connect Audio Input cable with the circuit. Connect audio input “L” cable with 1µf / 50v capacitor negative leg and audio input “G” cable with 10µf / 50v capacitor negative leg.

For output sound, we need to connect a sound speaker. Connect sound speaker one terminal with 4no leg of sound IC and it’s other terminal with audio input “G” cable.

To operate this amplifier circuit, now we need to connect power source with the amplifier circuit. For power source, we are using DC 12v. We connect it’s positive cable with 5no leg of sound IC and it’s negative cable with 3no leg of sound IC.

It’s the time to soldering and cut-off all extra leg of electronics component. Now we solder all component leg carefully and to make sure we need to check all of them for several times. We also remember that, there should not be any kind of short circuit connection. For perfect inquiry, we should use liquid PCB cleaner to wash PCBs.

Thanks to JLCPCB for sponsor us such a quality PCB board.

Our circuit is completely ready for use. To protect overheating, we need to use heat sink with the sound IC. Just plug-in power and enjoy the effect of sound.

If you complete design of your PCBs, then it is time to order PCBs. To order best quality PCBs, just visit JLCPCB and click on the “QUOTE NOW” button.

Since 2006, JLCPCB continuously driven to become more efficient and to reduce costs. They promise to offer customers the most economic PCBs forever. JLCPCB makes cheapest but top quality PCBs possibly because of scale effect, extremely high production efficiency and less manpower cost.

You can order minimum 5 pieces PCBs for only $2 costs.

To order PCBs, make your Gerber file. Then drag and drop the Gerber file on the following box.

Click on “Gerber Viewer” button you can check the PCBs design. Make sure everything is good, then choose color, quantity and order your PCBs at very reasonable prices.

If you are a new user, then you can order 10 pieces PCBs, costing only $2. To place your order click on “Save to Cart” button. Confirm your shipping address and shipping method.

To order your SMT PCBs, visit JLCPCB.

1.    Drag and drop SMT PCBs file on site.

2.    Choose your PCBs color and quantity.

3.    To free SMT assembly for your PCB click on “SMT Assembly” button and then confirm.

4.    Add your Bom file and CPL file.

5.    Place your order click on “Save to Cart” button.

6.    Confirm your shipping address and shipping method.

7.    Pay your payment

8.    Wait for confirmation mail.

9.    For SMT Service, Click here.

JLCPCB supported all shipping method can be seen below.

Estimated Delivery Time -

• DHL International Express 3-5 business days
• UPS Worldwide Saver 3-6 business days
• S.F Express(Standard) 5-8 business days
• S.F Express(Economy) 8-15 business days
• Singapore EMS 8-15 business days
• PostLink Registered Mail 15-20 business days
• ePacket 15-25 business days
• Registered Air Mail 15-20 business days

JLCPCB supported Payment method -

•         PayPal
•         Credit/Debit Care
•         Prepaid wire transfer

To confirm your order, pay your payment. Then accept PayPal, Credit/Debit Card, prepaid Wire Transfer. To manufacture your PCBs, it’ll take about 2 days. DHL will be fastest shipping method to arrive your ordered PCBs at your location.

All PCBs were well packed and quality was really good.

Thanks to JLCPCB for best quality PCBs.