TDA2050 amplifier circuit board 32W


TDA2050 amplifier circuit board 32W, The TDA 2050 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB audio amplifier. Thanks to its high power capability the TDA2050 is able to provide up to 35W true rms power into 4 ohm load @ THD = 10%, VS = ±18V, f = 1KHz and up to 32W into 8 ohm load @ THD = 10%, VS = ±22V, f = 1KHz. Moreover, the TDA 2050 delivers typically 50W music power into 4 ohm load over 1 sec at VS=
22.5V, f = 1KHz.
The high power and very low harmonic and crossover distortion (THD = 0.05% typ, @ VS = ±22V, PO = 0.1 to 15W, RL=8ohm, f = 100Hz to 15KHz) make the device most suitable for both HiFi and high class TV sets.

  • High output power
  • (50w music power IEC 268.3 rules)
  • High operating supply voltage (50v)
  • Single or split supply operations
  • Very low distortion
  • Short circuit protection (out to Gnd)
  • Thermal shutdown


The TDA 2050 has an original circuit which limits the current of the output transistors. The maximum output current is a function of the collector emitter voltage; hence, the output transistors work within their safe operating area. This function can therefore be considered as being peak power limiting rather than simple current limiting.
It reduces the possibility that the device gets damaged during an accidental short circuit from AC output to ground.


The presence of a thermal limiting circuit offers the following advantages:
1)An overload on the output (even if it is permanent), or an above limit ambient temperature
can be easily tolerated since the Tj cannot be higher than 150 °C.
2)The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no possibility of device damage due to high junction temperature. If for
any reason, the junction temperature increases up to 150 °C, the thermal shutdown simply reduces the power dissipation and the current consumption.

Schematic of Amplifier with TDA2050

Tda2050 Amplifier Circuit Board 32W

Suggested PCB for TDA2050 Amp

Printed Circuit Board Pcb Tda2050 Amplifier Circuit Board 32W
Printed Circuit Board Component View Pcb Tda2050 Amplifier Circuit Board 32W

BOM  to assemble the power amplifier.

Last update: 08/08/2021 23:32

Part Value Description Quantity
C1 2.2µF Ceramic Capacitor 1
C2 100µF Electrolytic capacitor 1
C3, C7 1000µF Electrolytic capacitor 2
C4 22µF Electrolytic capacitor 1
C5 100nF Ceramic Capacitor 1
C6 470nF Ceramic Capacitor 1
IC1 TDA2050 Audio amplifier integrated circuit 1
LED1 led 3 mm 3MM LED any color 1
Resistors 1/4W 5%
R1, R2, R3, R5 22k Red, Red, Orange, Gold 4
R4 680 Blue, Gray, Brown, Gold 1
R6 2.2/2W Red, Red, Gold, Gold 1
R7 10k Brown, Black, Orange, Gold 1
CN1 IN 2.54 mm 2-Way Connector 1
CN2 DC Terminal block 2 pin 5.08 mm 1
CN3 OUT Terminal block 2 pin 5.08 mm 1
P1 47K (473) Potentiometer 47K 1
Solder, Wire, PCB, Box, power supply

The source for this circuit should be 12 to 45 volts/ 2 amps*.

It requires a heat sink and the source must be DC voltage. You can use notebook sources that looks cool.

* If you use a source higher than 25V the electrolytic must have a working voltage of 50V and if > 40 Volts they must be 63 Volts!

Download the files for this assembly version 2021 – updated files with board in PNG, PDF, Gerber and postscript formats.



This IC can be found for sale in the market as TDA2050TB, TDA2050L, TDA2050V and TDA2050A

Buy TDA2050 in Aliexpress with free Shipping in the Worldwide.

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About the author blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

44 thoughts on “TDA2050 amplifier circuit board 32W”

  1. saya pernah bikin power amplifier sub TDA 7294.tapi kok suaranya kecil banget.bassnya gak bisa keluar.
    saya dari Indonesia.thank

    • Comment:
      saya tahu..dalam pemasangan part ada yang salah sehingga gain tidak keluar suara,
      cek polaritas part anda, jangan sampai terbalik

      to choleke kenter

  2. You actually make it seem so easy with your presentation but
    I find this matter to be really something that I think I
    would never understand. It seems too complicated and extremely broad for me.

    I am looking forward for your next post, I’ll try to get the hang of it!

  3. Hi, i bnuilded it and it don’t works and i don’t know why. PCB is clean, pins are ok and as supply i’m using 24v old notebook power supply. I can’t hear anything in the speaker. TDA or any differnt component don’t heat. At first start i added fuse 3,5A and it doesnt blow so theres not problem. Can you help me please??

  4. Hello to all who come to this page to build your audio amplifier. I have tested this circuit. and let me tell you that is a mistake. The PCB is in no way mirror. printed as well, to work, the TDA2050 I will have to put on the side of the tracks. and to prove it, see the datasheet of the TDA2050. In the Pin1 is the audio input. And when they finish the PCB is in Vs Pin1 +.
    Luck …

    • ohh please its fine flip the image so that u can read the pcb words correctly i.e the +ve and -ve and xtronic read correctly and there u go…………use paints to flip the image horrizontally then rotate +180……..good luck

  5. Hola a todos los que lleguen a esta página para construir su amplificador de audio. Lo he probado a este circuito. y dejenme decirle que tiene un error. El PCB no está en modo espejo. si lo imprimen así, para que funcione, el TDA2050 lo tendrán que poner del lado de las pistas. y para corroborarlo, vean el datasheet del TDA2050. En el Pin1 va la entrada de audio. Y cuando terminen el PCB, el Pin1 queda en Vs+.

  6. Hola capo muy bueno una pregunta funciona con 12vcc? me podes mandar al correo el PCB para imprimir? gracias muy bueno!!!!!


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