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    TDA integrated circuits series are very well apreciated and used in amplifier designs and projects. TDA audio amplifier circuits are produced in generally by Philips and SGS-THOMSON. The most used ICs are TDA2030 and TDA2003 for small audio amplifiers kits and TDA7294 for higher power amplifiers.
    In this article we present some representative amplifiers schematics with TDA circuits: car and home audio amplifiers with datasheets below every circuit diagram.

    Jump to chapters:

    TDA2003 amplifier circuits

    TDA2003 is a cheap amplifier that is designed to run on single rail power supplies (unipolar). It provides a high output current capability (up to 3.5A), very low harmonic and cross-over distortion.

    TDA2003 10W car radio audio amplifier
    tda2003 amplifier

    TDA2003 bridge 18W amplifier

    TDA2003 can be used as an BCL (bridge amplifier) and car deliver up to 18W.
    tda2003 bridge bcl

    TDA2005 amplifier circuits

    TDA2005 is a class B dual audio power amplifier specifically designed for car radio applications. Its high current capability (up to 3.5 A) and the ability to drive very low impedance loads (down to 1.6 ohms) makes this circuit a good choice for cheap power booster amplifiers.

    TDA2005 stereo amplifier 2x10W
    tda2005 stereo

    TDA2005 bridge amplifier 20W
    tda2005 bridge

    TDA2030 amplifier circuits

    TDA2030 is a monolithic integrated circuit in Pentawatt package, intended for use as a low frequency class AB amplifier. Typically it provides 14W output power (d = 0.5%) at 14V/4Ω at ± 14V or 28V, the guaranteed output power is 12W on a 4Ω load and 8W on a 8Ω

    TDA2030 amplifier circuit 20W
    tda2030 diagram

    TDA2030 PCB layout
    tda2030 cab
    tda2030 pcb

    TDA2030 Assembly
    tda2030 assembly

    TDA2030 Bridge amplifier 35W
    tda2030 bridge

    TDA2050 amplifier circuits

    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 8ohm 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.

    TDA2050 amplifier 35W


    tda2050 datasheet

    TDA7294 amplifier circuits

    TDA7294 is a monolithic integrated circuit in Multiwatt15 package, with high output power (up to 100W) intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Topclass TV). Thanks to the wide voltage range and to the high out current capability it is able to supply the highest power into both 4W and 8W loads even in presence of poor supply regulation, with high Supply Voltage Rejection.

    TDA7294 amplifier 100W
    tda7294 amp

    TDA7294 PCB layout

    TDA7294 Assembly

    TDA7294 bridge amplifier 250W
    tda7294 bridge

    ask a question

    79 Responses to "TDA Amplifier Circuits"

    1. Chaitanya Bhandari says: on March 10, 2009 at 5:26 am

      Thank you very much. I get some audio amplifier circuits from ur site which r useful for my project.

    2. nubagabaga sarsail

      • i love you patiyo….. very good and clean practical ciruit diagrams! ummma…

      • Oya meka heduwada?

      • Hey can any one help me to build my apmlifier

        I have a AIWA NSX WKT10 model it’s a home HiFi system
        it is 500 watts amplifier a 5.1 channel.

        It’s amplifier board is not working I mean to say it not even getting ON
        I want to build up a 5.1 channel amplifier and I want to work on my this AIWA POWER UNIT because my power supply is still working.

        Please guide me how to build a 500 watt 5.1 channel amplifier
        I want the full information because I am just a beginner…

        Soon I will post pics of my AIWA AMPLIFIER BOARD AND IT”S POWER UNIT..


    3. minh thay cac mach tren rat don gian nhung khong biet chat luong am thanh cua no ra lam sao nua co duoc hay khong

    4. TDA Amp is a good choice for low cost. And High Quality Amp.

    5. I like the perfomance of TDA 7384. Its the best!

    6. Tda 2003 is the simplest amp. to make in fact it was my first amp to try. Next let me try Tda 7294 and I will keep you informed of the results.

      • Ok, thanks for your feedback. I think TDA2003 is a good starting point for every hobbyist. I have seen an amplifier made with TDA7294 and the most import thing was the power source. It must deliver high power and have a very good filter.

      • eric francia says: on June 4, 2014 at 6:09 pm

        hi can you help me what is the csuitable power supply for TDA 7294


    7. vukasin vasiljevic says: on May 9, 2011 at 10:51 pm

      i have made a lot of amplifiers,not only TDAs…But i made one with bridged TDA7294 and i have problem with that st-by\mute function…How does it works?

    8. surely tda7294’s mute/st by function is alittle bit confusing.am also intrested inRF transmission and reception especially in the UHF and MIcropwave range.could someone out there pliz help especially in circuits using transistors.


      • Johny Radio says: on June 16, 2012 at 10:26 am

        Hi Malcolm, have you found a use for your tda chips? If not, would you like to donate them to a non-profit organization? We teach electronics to poor teenagers, by helping them build amplifiers. Check my website bvhpradio.org/boom. Cheers!

    10. I’ Have made the amplifier with TDA2003 in most case and works, but its very amplified in Bass and Treble

    11. tda7294 is giving very low output. Iam using 24v 2amp DC adapter.

      • For better output results you must use a 35v 4amp adapter because as the ic gives more than 100w output so as the input voltage.and amp also increases for giving better output results.

    12. hi guyz im planning to build TDA7294 can you give me the exact size of pdf,

    13. hi;
      TDA Amp is Very very Good amplifier and high Quality Amp 😉

    14. TDA is great!!!!

    15. This web site doesn’t show up correctly on my droid you may wanna attempt and repair that

      • is headphone/pc/mobile output is directly connected to tda 7249 input,
        power supply= 40v & how much ampere`s, or how much transformer output, & ac to dc converting circuit.

        stereo to 5.1 channel converter,other than NJW1186,
        and where to get remote control circuit, cent, sub, rear, l&r vol control

    16. what is full form of tda actually

    17. do you have a pcb layout of tda2005 2×10?

    18. i made TDA 2003 bridge amp acordind to this schematic, and it didn’t work, is thare something wrong whit that?

    19. I assmbled TDA2050 for my 5.1 system and it works great. Thanks man!!!

    20. já montei vários circuitos que encontrei na internet, mas muitos não deram certo. os resistores não casavam bem com os circuito integrado que eles pediam.

    21. TDA–>best choice for simple & cheap ampplifier.

    22. on the TDA7294. Im confused with the Standby/mute. Is there a way i can completely remove this from the circuit? I have seen TDA7294 plans that remove pins number 5 , 10 and 11 (snapped off) with the standy was connected to the ground (from what i could tell) Would that work? I do not need these functions. PS: THANKS FOR THE PLANS =)

    23. sir iam using tda7294 bridge amp circuit output is very good but input supply voltage range? Iam using 30-0-30v 5A transformer but IC very heat at the time output very very low please help me sir

    24. input supply voltage range in tda7294 bridge amp circuit

    25. After fighting some time with a 50W RMS amplifier, self-designed with TIP122 and TIP127 at the output stage, I decide then to implement an integrated cirtuit option. I chose the TDA2002 (similar to TDA2003) on bridge configuration. Feeding it with +21 volts and a 4 ohms load, can obtain over 30 W RMS at the output with good stability. An interesant option for domestic use.

    26. Somanshu Mehta says: on May 7, 2012 at 10:17 am

      TDA best choice for simple & cheap amplifier at home.


    27. Which type of capacitors are used in tda 2003 bridge amplifier 18watts

    28. I think here some TDA boards are missing out I think TDA had a60 watt Amp board

    29. Sir,

      I want build a 200 watt subwoofer amp with TDA 7294 IC. Please sned me the circuit diagram with pcb lay out. Hoping with better response.


      Punam Pradhan

      • Dipak Pakhale says: on July 16, 2014 at 8:30 pm

        What are you doing with layout? I’m also going to build amplifier with tda 7294. But whats abt your experience with its pmpo quality? Can I produce higher PMPO audio?

    30. Hi all,

      I need DATA sheet of Ic TDA15520.

      I hope to get it as early,

    31. sir , i want a 12inch speaker operate amplifire , (alpine ,sony any company amp) not use this amp. i use desi type like local made amp. 9872076247

      • Shailendra yadav says: on November 15, 2015 at 6:26 pm

        dear aman,

        i have collection of many type of amplifier circuit like tda7294, transistor amplifier in AB class which is suitable to drive 10 inches speaker if you want this circuit you can call me, my contact no. 9764095702

    32. N.Muthukrishnan says: on July 20, 2013 at 2:02 pm

      Respected sir,
      i tried tda 7294 circuit it is very nice and good but it is working in dual power supply. Is it possible to use in dc 24 volt single supply any idea ply reply me via krishna198023@gmail.com
      thanking you

    33. i made ckt with TDA794 same as given in the ckt and one of my ic blown off. what was the reason behind this? can anyone help me

      • maybe your speakers there is short on your speakers or your posivetive out let speakers on your ic there is a short

    34. Dear Rohit Kumar, you might have connected one output lead to ground !!!

    35. problem with7294 no sound help me guy ……thanks

    36. i have a problem with TDA2003 producing disorted sound later himming sound

    37. I have a question for the TDA7294, (capacitor): What is the voltage of the electrical circuit capacitors that needed to run the amp ?

    38. Well, I have used the TDA7294 in the bridge configuration to drive a 200Watt Subwoofer Driver (Speaker). The subwoofer driver (speaker) is of American Make manufactured by BOSTON. I have used a very well regulated power supply of +/- 33VDC @ 8 Amps (Transformer rating: +/-24V AC @ 8Amps). During power up, there is no Pop & Click noise, sound generated is decent when the volume control is adjusted to about half of the traversing area of the potentiometer (100K Ohm). But on higher volume, the IC to which the signal is fed, burns out. I have literally burnt three of these ICs trying to figure out the problem, but still unresolved. I think that the current supplied is too high for the IC to handle. Users can use transformers of +/-24 V AC @ 5 Amps, without hassle. But I can guarantee, that if people use a 100 Watt Subwoofer driver (Speaker) and drive the signal to the max volume, these ICs wil be able to handle the load. Please be cautious not to exceed the voltage limit beyond +/- 35 V DC, as it will prematurely damage the ICs.

      • r de vreede says: on September 15, 2014 at 10:57 am

        You need bootstap bjt. Since you can’t cool the unit when you use high power : <1k/w, impossible to cool, but did you have a thermal shutdown unit(s) used?….. zThese are all the very basic schematics you can make on this page, but the ic gives perfect sound till 50 Watts, that's it….. and then you need bootstrap transistors or fets(less ) Which use a higher votage and can be used as votage stabilzer and after that a power bridge and then you can achieve 150 watts rms. Don't forget that this ic ain't newbie……

    39. ، مدار ها عالی هستند
      من چند تا را ساختم، کیفیت صدا عالیه
      ممنون :)

    40. Neil Bryan Daculan says: on May 25, 2014 at 3:27 pm

      TDA is the One of favorite circuits……

    41. Hello, how do you make the calculus for choosing the resitances and capacitors for the tda 7294 circuit?

    42. of cause i have to do a lot of research in order to finalize my work with out any error and so could not tell you by now

    43. I made TDA7294 amplifier. I used your PCB. So can anyone tell me why have my speaker sound like there is short circuit? I used transformer 2x24v/100VA, so there is voltage 22v-0v-22v. If I understand true, there is +-44V, so maybe the transformer is problem or what?
      Best regards.

    44. circuit of TDA7294 doesnt work :)

    45. Is true that this TDA7294 works?

    46. It doesnt

    47. Can anyone tell me the exact voltage and current ratings of Xmer needed to give a good quality sound with TDA7294

    48. What is a longform of tda?

    49. Which amplifier will run on 6volt . It should have a memory system and 2 speaker point

    50. Hello,

      Many thanks for the great effort.

      I wanted to know how can I use those VCA designs with an external control voltage? I need to be able to vary the input signal’s amplitude by means of an external 2V –> 8V control voltage.

      Any help is highly appreciated. Thanks in advance.

    51. hi,i wanted to know how a 2.1channel system produce 5000watts using tda2030.The subwoofer box is ported plus sealed.There are two satelite speakers,-12,0,+12 transformer and jrc4558 ic.

    52. Hi there , tda circuits are cool i think .
      i,v made several of them & had success but this time with 2003 have
      little problem. the music is strong but the voice of singer is in the
      background & fable .power supply with a trafo 12v 3.5A & a cap 6800
      & 4, 5404 ,works good . i change the cap 1000 (near the speaker) by
      a 2200 ,i used a 4558 for preamp & i change it 2 or 3 times but (NO) unresolved problem . any help is highly appreciated .

      thanks in advance .

    53. Oh damn that is one what i search as long before.
      Tda7294 type,somebody please sell to me.
      With or without boxes just nevermind but ensure it must working.u can set off price.please contact me on angkp06@gm*******

    54. Shailendra yadav says: on November 15, 2015 at 3:17 pm

      i have made tda7294 audio circuit, it is working and producing good quality sound.but this circuit required double rail power supply please send me circuit digram of tda7294 on single rail power supply

      • Hi ,the tda7294 requires both rails ,since it need to be biased correctly for differential common mode and quality noise rejection

    55. respected sirs

      i’v ride a 2030 circuit , with 2*7,5v trafo & 2*6800 35v caps.
      good shielding ; twisted wiring ; well designed pcb & star
      grounding but there is some noise like hummmm when i turn
      it on. please guide me to resolve it.
      any help will appreciated. thanks in advanced. amir

    56. Tat2030 data sheet PCB full spar delivery9489891378

    57. Hi
      i want design 250W class D audio amplifier but i confused some body used Mosfet and some body use Ic like TDA, what different between them?

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