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» » »TDA2030A Chip Sound Amplifier
I found an unnecessary board from the TV. My eye was attracted by the TDA203A chip. I know that TDA microcircuits are low-frequency amplifiers, there is a lot of information about them on the Internet. I decided to assemble my own simple amplifier according to the scheme:
TDA2030A Chip Sound Amplifier

It will be required for assembly

  • Chip TDA2030A.
  • Capacitors 0.1 microfarads - 3 pieces.
  • Capacitors 2200 μF 25 V - 2 pieces.
  • 2.2 ohm resistor.
  • Resistors 22 kOhm - 2 pieces.
  • 680ohm resistor.
  • Capacitor 22 uF 25 V.
  • 4.7 microfarad capacitor film.
  • Case, switch, wires, radiator, connectors for tulips.

Build a simple amplifier on the TDA2030

My goal was to create an amplifier without spending a lot of money on it. All the details except the case I found in various old boards, which are not naturally needed.
To assemble an amplifier on the TDA2030, you can use various methods and solutions, in this case I will use a hinged installation. Since many pins are connected to ground, I recommend making a branching wire.

Next, proceed to soldering the joints.
The countdown of the conclusions of the chip is from left to right, with the marking and conclusions aimed at you.

After you have assembled the circuit - check it. We’ll connect the speaker and check the amplifier at a low volume.

If everything works, proceed to the next step.
I had a finished building. It is better to bring the radiator out to better cool its surface. Otherwise, overheating may occur in the housing.
Attach the radiator, connectors, remove the power wires, set the on - power switch.

The amplifier has the following characteristics:
  • Supply voltage - from ± 4.5 to ± 25 V.
  • Output power - 18 watts.
  • The nominal frequency range is 20-80.000 Hz.

Almost all such microcircuits are very hot and therefore will not work for a long time without a radiator.

Final view:

This is a truly incredible simplicity scheme, which even beginner hams can afford. With all this, it has decent characteristics for its minimum size.
Assemble your amplifier and you will be happy friends.
come back
Comments (62)
  1. Andrei
    #1 Andrei Guests October 8, 2013 21:38
    Hi, it’s a very good article, but I don’t manage to figure out the circuit, but I really want the amplifier, please draw what to solder
    1. Edward
      #2 Edward Guests February 15, 2018 00:43
      Well, what is incomprehensible here. There is a shemka, legs 1-5. Here, as shown on the diagram, the legs are soldered to these legs and voila
      Look, everywhere the schemes are the same. The legs are the same.
  2. opav
    #3 opav Guests January 13, 2014 16:58
    Quote: Andrew
    Hi, it’s a very good article, but I don’t manage to figure out the circuit, but I really want the amplifier, please draw what to solder
  3. Dmitry
    #4 Dmitry Guests January 18, 2014 11:47
    Guys, what's the deal? Solder according to the scheme, the ratings are all there, the outputs are marked as grounding in the common bundle, and minus, the radiator is longer for ms, and the thermal grease is fatter)) Today I’m going to solder it myself.
  4. Dmitry
    #5 Dmitry Guests January 23, 2014 13:36
    Soldered the other day the other day, but! He does not sing, is silent with a 4-ohm, a diffuser jumps in dynamics with an 8-ohm, and that’s all, the question is, where is the error? I checked the circuit several times, it gave power to 7.5V, and 12.0V, to 7.5V there was no effect at all (((
  5. Andriano
    #6 Andriano Guests March 1, 2014 19:24
    Hi) I collected this amp from rubbish, put it in a burnt sub, and was shocked, the bass was even, it worked from the crown for 3-4 hours, thanks for the article, I’ll take care of it
  6. Kolyan
    #7 Kolyan Guests March 30, 2014 20:09
    Hi)) I collected this circuit, and I did not find the C5 element, I replaced it with two 1000 microfarads and two 100 microfarads in parallel. And turning it on, after 3-5 seconds the transistor exploded, the voltage was 10.5 volts.
    And from this question: He exploded because of this replacement? If not, then why? It's just that I'm not strong at that.
  7. Kostyan
    #8 Kostyan Guests April 4, 2014 23:26
    No, not because of this. most likely mixed up something in the connection of the chip. About ten years I assembled a circuit, everything worked, but this circuit requires high-quality assembly, namely:
    1. A good radiator.
    2. Reserve power supply.
    3. Power wires must be at least 2mm2 cross-section. Otherwise, the amplifier will enter self-excitation at a very high frequency and die.
    If everything works, but the sound is not clean with distortion (metallic), increase power and filtering by power.
    And you will be happy.

    Powerful and clear sound is amazing.
  8. Vova
    #9 Vova Guests April 23, 2014 03:23
    Guys, is it possible to replace the film capacitor with something?
  9. Nikitos
    #10 Nikitos Guests June 29, 2014 03:32
    And why are tulips “input and output?” What’s the output? Jack + 2 tulips are the same cable?
  10. Nikita
    #11 Nikita Guests July 7, 2014 03:03 a.m.
    Thanks for the circuit, a very cool amp !!! Deep clear sound !!!
  11. Alexander
    #12 Alexander Guests July 8, 2014 08:06
    And you can make a circuit of 2-4 such transistors I will be very grateful)
  12. sasha
    #13 sasha Guests July 13, 2014 12:52
    why is my wheezing after half volume? and so super! wink
    1. grisha
      #14 grisha Guests December 4, 2018 9:28 p.m.
      Do you have any power speakers? if at 10 watts or in the area, then nothing surprising
  13. Grandpa
    #15 Grandpa Guests July 15, 2014 22:44
    The frequency range cannot be 20-80000 Hz, since the characteristics of the TDA 2030 microcircuit and our analogue K174UN19, 20-30000 Hz.
  14. Vyacheslav
    #16 Vyacheslav Guests October 31, 2014 2:21 p.m.
    Dear! Tell me the optimal nutritional indicators. The current strength and power of the PSU.
  15. Ilya
    #17 Ilya Guests January 15, 2015 16:13
    Why, after turning on the circuit, the first 15 seconds. works well, and then starts to wheeze ...
    Collected 2 times. Same(
  16. Maksim
    #18 Maksim Guests January 17, 2015 22:42
    If wheezing - see nutrition.
  17. serge
    #19 serge Guests January 28, 2015 18:18
    where to connect the volume intensity resistor ???
  18. Lexus
    #20 Lexus Guests January 29, 2015 13:20
    if the source is unipolar, do you need to do a midpoint in nutrition?
  19. Zaur
    #21 Zaur Guests March 18, 2015 22:23
    I'm new to this business, and I would like to know this settlement on the sub can be connected
  20. Zaur
    #22 Zaur Guests March 19, 2015 22:29
    Gathered this settlement today. I was surprised that he had made money. I connected to the phone at the beginning and gave 6V, but it was very quiet then I gave 12V voltage it became much better but still quiet now I think to buy a 24V unit
  21. Sanya
    #23 Sanya Guests March 20, 2015 08:08
    Guys, is it possible to replace the film capacitor with something?
  22. Sergey
    #24 Sergey Guests March 23, 2015 18:35
    Why is it singing very quietly?
  23. Anton
    #25 Anton Guests March 25, 2015 19:52
    Help me please! I have such a problem, I turn on the amplifier and there is a strong hum in the speakers. What is the reason for this?
  24. Novel
    #26 Novel Guests April 10, 2015 23:20
    Collected. Quick and easy. When using the PSU 12V 1.0A at minimum volume, it works for 3-4 seconds and shuts down. When using a power supply from a laptop 18V 3,5A it works for 13-16 seconds and the same thing. It’s clear that there are problems with the power supply, but I don’t understand whether there is a PSU in the power supply in the assembly? Please tell me.
  25. kurikon
    #27 kurikon Guests April 18, 2015 14:54
    how can I replace a film capacitor?! tell me ...
  26. Dmitry
    #28 Dmitry Guests July 16, 2015 01:33
    [b] Roman [/ b],
    Need two polar and not ordinary

    I recommend taking a scheme from a datasheet
  27. Sergey
    #29 Sergey Guests July 20, 2015 20:07
    Soldered))) everything works connected 25GDN - now I solder the low-pass filter and there will be a small subbuffer in the car)))
  28. Vadim
    #30 Vadim Guests July 31, 2015 08:13
    guys such a problem! collected this amplifier but sings quietly! capacitors set electrolytes and 104. The supply of two polar + -13V. tell me what is the reason?
  29. Alexander Andreev
    #31 Alexander Andreev Guests October 31, 2015 04:47
    Guys, what is the power of resistors, I'm just new to this business)
  30. Andrey Rybalka
    #32 Andrey Rybalka Guests November 5, 2015 15:59
    Assembled this amplifier. instead of a sound, there is some kind of rumble and rattling. Why?
  31. alikhan
    #33 alikhan Guests December 23, 2015 10:00
    0.1mkf capacitors which ceramic or electrolytic
  32. Niklai
    #34 Niklai Guests January 13, 2016 11:29
    If it works cleanly but not for long, then maybe turn it on without a radiator, the microcircuit heats up and turns off.
  33. Sergey
    #35 Sergey Guests March 6, 2016 23:15
    It is foolish to assemble such a circuit with a hinged installation. Do not forget that with such an interweaving of wires, unwanted feedback will appear between the input and output of the amplifier. As a result, the amplifier will self-excite at low and high frequencies, this will be noticeable with an increase in volume. The microcircuit will buzz or squeak and bask. The power supply should be with a power margin of about 5 amperes and well filtered by electrolytic capacitors, at least 2000 microfarads at the input and output of the stabilizer. Then there will be a clean and powerful sound.
  34. Vitaliy
    #36 Vitaliy Guests March 11, 2016 19:13
    [b] Vova [/ b],
    [b] kurikon [/ b],
    yes put any, paper will only be big. And if you put the electrolytic, then the polarity must be observed.
  35. Igor
    #37 Igor Guests March 13, 2016 15:36
    Is the capacitor at the input too big? I think it will give a very low cut, the speaker in honest 18 watts will work to break
  36. Alexander
    #38 Alexander Guests April 16, 2016 15:35
    I didn’t like the sound, I thought the matter was in mikruh, I changed it, also garbage. Is there food with a comparable point or just - / +? I screwed to 9 volts without a midpoint.
  37. Sergey
    #39 Sergey Guests May 27, 2016 13:16
    Please tell me, should all 25V capacitors be here? Or it’s possible more or less. And is it still possible not to put tulips and immediately solder a wire with a 3.5mm plug and the output is just a speaker. Thanks in advance!
  38. qq213q
    #40 qq213q Guests June 19, 2016 23:23
    [b] sergey [/ b],
    More can, less can bang. 3.5 and the speaker is also mono [color = # FF6666] [/ color]
  39. Victor
    #41 Victor Guests September 13, 2016 17:52
    [b] Dmitry [/ b], And what kind of food? Bipolar?
  40. Victor
    #42 Victor Guests September 13, 2016 17:54
    [b] alikhan [/ b],
    Film probably
  41. Andrei
    #43 Andrei Guests September 18, 2016 17:31
    it’s better to do it right away on the circuit board, this is my advice. did as in the article and what do you think. everything works fine, only while I put it in a car, 2 legs of the microcircuit just came off at the root
  42. Gorg
    #44 Gorg Guests November 8, 2016 10:07 p.m.
    Hi! And how much OM put the speaker.
  43. Ivan
    #45 Ivan Guests November 17, 2016 02:50
    [b] Anton [/ b],
    If there is a strong hum in the dynamics, check if the polarity of the power supply is reversed.
  44. Ivan
    #46 Ivan Guests November 17, 2016 03:01
    Assembled shemku works. From the MP3 player, the sound is clean, clear and connected to the computer - you can hear mouse scrolling, HDD and other buzzing ((. Who knows how to decide where to dig tell me pliz.
  45. stepan
    #47 stepan Guests November 23, 2016 16:05
    [b] Kolyan [/ b], from school: electrolytes must be connected in sequence.
    1. E.V.
      #48 E.V. Guests April 7, 2018 12:21
      Capacitors include in parallel!
  46. Kostya
    #49 Kostya Guests 12 january 2017 19:56
    The microcircuit is cool, it is possible to connect it via a bridge circuit and then all this disgrace can be dispersed to 180 watts according to Soviet standards, everything is simple: there are a couple of transistors for unloading and everything in a bundle! There are a couple of features, the power of the microcircuit depends on the manufacturer, everything is in reference books if of course you have such! :) The chip conflicts with some preamps. The experiments were carried out more than 15 years ago, if set up, then God forbid! Who needs a connection scheme for old chips write. I will try to answer as soon as possible.
  47. Guest Vadim
    #50 Guest Vadim Guests 25 January 2017 18:19
    [b] stepan [/ b],
    Just the opposite.
  48. Andrei
    #51 Andrei Guests January 29, 2017 10:59
    Hello, tell me please, if there were tda2030a in the circuit, can I put tda2050 instead
  49. Vasya
    #52 Vasya Guests 12 February 2017 18:50
    Something the author was modest - 18 watts. I would write 200 for an even count.
  50. Yhhb
    #53 Yhhb Guests May 14, 2017 18:18
    Hello, I took the soldering iron for the first time and really wanted to assemble this amplifier !!
    Tell me, is it possible to replace 2200mkf 25v capacitors with 3300mkf?
    1. unch
      #54 unch Guests March 19, 2018 09:19
      Put, the nutrition filter will be even better.

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