This is the simplest audio frequency amplifier capable of delivering 50 watts of power to each channel of four. This adds up to 200 watts of sound power. And this, as it turned out, is not the limit. The microcircuit on which the amplifier is built can provide 80 watts per channel for a 2 ohm load.
In our time, building a powerful amplifier with your own hands is not difficult. And all this thanks to the modern element base.
Today we will talk about a simple amplifier on the TDA7560 microcircuit, which can easily be made by a person who is practically not versed in electronics.
The Philips TDA7560 chip is just a godsend, especially for those who have not encountered it before. It has long been chosen by both novice radio amateurs and motorists for its low supply voltage. The TDA7560 chip has a complete, but older analogue - TDA7388, slightly less powerful.
Amplifier characteristics
Output power:- At a load of 4 Ohms, the maximum is 4 x 50 watts.
- At a load of 4 Ohms, the nominal is 4 x 45 watts.
- At a load of 2 Ohms, the maximum is 4 x 80 watts.
- At a load of 2 Ohms, the nominal is 4 x 75 watts.
- Supply voltage from 8 to 18 volts.
Amplifier circuit
The circuit for switching on the microcircuit can always be viewed in. Everything is simple and obvious: on the left there are four inputs, on the right there are four outputs to the speakers. Naturally, the input can be closed with each other, but not the output. Each output of the microcircuit must be loaded on its own speaker system.
With this, I think, there will be no questions. The only thing worth clarifying is the "ST-BY" and "MUTE" outputs. "ST-BY" is the standby mode, the usual one is immediately connected to the power supply plus and the amplifier is always active. "MUTE". - this is the mute mode, the usual one is also connected to the power supply plus and the amplifier always becomes active. There are jumpers on the board for this.
Amplifier board
The boards can be made with a regular LUT in a few tens of minutes. You can download it here:
(Downloads: 2817)
After soldering and assembling the amplifier, do not forget to install the microcircuit on the radiator, preferably a large one if you are a music lover who loves volume.
Amplifier application
The microcircuit was originally developed for use as a sound power amplifier in car radios. Therefore, using this amplifier in a car is an excellent choice. But note that it is advisable to use thick power wires. It may also be necessary to significantly increase the capacity of the power filtering capacitors.The on-chip amplifier is great for home use as well. You can power it from an old computer power supply, as I did in my time. And using a cooling radiator with a fan will significantly reduce its size.
I think there is nothing complicated here, but if someone does not understand something, I am waiting for your questions in the comments. Thanks to all!
I just want to build myself a stereo amplifier on two microcircuits with an impulse power supply. I found out about it from the book “3500 LOW FREQUENCY POWER AMPLIFIER CHIPS ...” But I heard that all these are TDA 2003 microcircuits; TDA 2004; TDA 2005; 2010 ...; bad. I already had such a beat, the TDA 2003 microcircuit was lying around, I assembled an amplifier on it, and it burned out, the microcircuit melted. Maybe someone knows exactly what load the TDA 2025 microcircuit will bear with a power of 50 watts, more in the book he writes 4 OM. And here, as I understand it, he writes to 8 OM. І how many amperes does he need? If someone collected it, tell me why does it work well does the microcircuit burn out right away? Please leave a comment with vidpovidu on this question ...
Mars 33, about the load:
The load can be either 4 ohms or 8 ohms
If you look at the table of characteristics, then it is indicated that the output power of 45 ... 50 W will be at a load of 8 Ohms and a voltage of 32 V.
If we talk about TDA microcircuits, then only one microcircuit from this series burned out at once - TDA 2005. But, for example, TDA 2030 works perfectly, even with short circuit. So I can only draw one conclusion, namely, not all TDAs are bad. In terms of price / quality ratio, they are excellent microcircuits.
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Have you tried looking for TDA2025 on the Internet?
Look here _http: //www.relcomp.ru/products/view/138425
thanks, I'll try to do this)
There is also a cool circuit for a 2-channel 22 W amplifier. There is also a minimum of details and one mikruha
And you have not tried to use the search?
Amplifier on the TDA1552 chip
can I replace TDA2025 with TDA2025Q? what does the letter “Q” mean?
Lexa777, TDA2025Q can be used. Letter indices can mean a slight difference in parameters or a difference in the design of the microcircuit case.
K174UN12 is a two-channel electronic volume control and channel balance.
Connection diagram:
In sound reproducing equipment, they are usually used together.
that is, in any way you need tda?
For this 50W amplifier circuit, exactly the TDA2025 is needed
by the way, why on the sketch of the printed circuit board from plus to minus, in addition to the 100mkF capacitor, there is also a 0.1mkF capacitor, although it is not in the circuit diagram?
This ceramic capacitor is located on the power supply pins to filter out high frequency noise from the power supply. And it is not indicated on the diagram because, in theory, a ceramic capacitor should be an integral part of the power supply of any amplifier.
P.S. And for better filtering of network interference, a ferrite ring is used in addition to the electrolyte and ceramics. This is if the wires from the source are too long.
Thanks for the clarification. Sorry that I don’t know the elementary things
We are always happy to help radio amateurs of any skill level. We all started somewhere and still don't know much.
but at the music center I don’t plow. I can’t fix it myself, but it’s expensive to carry it for repairs, so I’m thinking of riveting on Tedashke 2050, and the food there in the center is also 40v and the acoustics are suitable for parameters (ohms and cotton wool). it will be cheap and angry — how do you think ????????
Good evening to all fans of the sound of radio tubes! There are many good amplifiers on the site, so I will publish a version of my LUNCHmono. It took a long time to collect it, for almost a whole year I periodically took on the project and gradually completed it, and now, finally, the time has come to submit the final version to your court. Purpose: the use for the subwoofer channel was calculated.
ULF circuit on 2x25 watt lamps
Chronology of construction
- Locksmith and carpentry works approximately 1 year ago. (Scooter)
- Installation of transformers, choke and existing elements, and their wiring. (Scooter, Ma $ ter)
- Break. (The ownership of this LUNCH stage is transferred to Ma $ ter).
- Since June 29, 2014 work began on the selection of the required voltage map, which were necessary for this circuit. Well, then setting up, wiring everything else. (Gamzan, Ma $ ter).
- Debugging, tuning. (Gamzan, Ma $ ter).
- Final touches (Ma $ ter).
- There is no time to light up the volume knob :)
Photo amplifier
The photo shows the TA262 anode transformer, a choke, and TVZ TAN (no data). The incandescent transformer, which also forms the bias voltage, is in a separate compartment. In general, you can try to imagine the weight of LUNCH, but you will not succeed - in reality it is even more.
All voltages are in accordance with the circuit diagram. In addition to the output transformer (according to the scheme, some other one is used there). As for the power of the amplifier, at 25 watts, the quality is still sane, but at 35 you can already hear significant distortion, and 50 is most likely the limit. The speaker is used with a 25GD-26B speaker.
Kind time of the day.
This is the second stereo amplifier on such microcircuits., which I collected, the first was assembled back in those years, when I just returned from the army.The amplifier served me faithfully, I was very pleased with the work, although it was assembled by external mounting. how– then my friend, with whom we served together, came to visit me, he liked my amp and asked him to sell it, I did not agree to sell it, but just gave it to me.
Quite a long time has passed since then, but then, how did that amplifier sound, in my memory.After collecting quite a lot of amplifiers later, I did not feel that sound, no - the amplifiers were quite decent, but the sound was different.
Not so long ago I managed to get a couple of ORIGINAL microcircuits tda1514a, which I was incredibly happy about.Taking the old directory, I found a diagram and description there, in fact there were three options for inclusion: normal, normal without voltage boost and bridge.I had no load on the pavement,and desires, not an extra pair of microcircuits.Most of all I liked the inclusion without a voltage boost circuit, while the sound improved significantly, although the output power decreased slightly.
Initially I tried switching on with a voltage boost, in the end I got 67Watts for 4 Ohm, while the sound was quite good, but one of the shoulders either increased in amplitude relative to the other, then decreased. As a result, I turned off the voltage boost, in fact, I threw out the capacitor and the resistor, and that's it, turned it on again, tried to load it again and see what would happen to the signal, the signal did not increase above 15 IN and then trimming of the tops of the sinusoid began, which is characteristic almost immediately in both shoulders. Turning on the music, listening for about an hour, turned on the voltage boost again and immediately turned it off, the sound really got a little worse, it became as if with bass that– then it wheezes, and on HF it starts to whistle, but this is only my subjective opinion.
In general, I decided to do it only without a voltage boost circuit.Power is already quite goodand chnaya, and 5-6 Won't do the weather for me. P rikinul as everything will be on the seal, spread and put it off for a while.When turned out free– started * sculpting *. It turned out quite not bad , I made a seal under the scraps of fiberglass that I had, so that they did not lie around idle, so they turned out so small, but the layout was according to all the rules.
I found an old case from a satellite tuner, * modified it with a file * and in the end we have such an amplifier.
The power supply is analog, the transformer from the Vega 10u120s amplifier, the radiators from it, too, everything fits very well both in terms of power and dimensions, and the recommended power supply was practically perfectly maintained.
Now a little about that very sound.The amplifier is absolutely not whimsical to the speakers, perfectly plays out any musical genres (styles or whatever you call it). He has no preferences, like the lampoviks or ITUNs. When listening to speakers of the y90 type, it proved itself very well, the power felt like speaking - * according to an adult *, while distortion did not appear almost to the stop of the twisted volume control knob. I strongly advise everyone who wants to repeat the amplifier I assembled to make sure that the surface to which the microcircuit case will be screwed is as even as possible, since the microcircuit is fixed on both sides and if there is a * bump * somewhere, then you can simply split the case, and this not very cheap in terms of time,and for money loss.
The microcircuit has long been discontinued, it is considered quite a rarity, and therefore many Chinese (and not only) fakes have appeared. Retail prices for 1pcs start from $ 20, while not 100% known, what will be inside.
Good evening to all fans of the sound of radio tubes! There are many good sound amplifier circuits on the site, so I will publish a version of my mono LUNCH. It took a long time to collect it, for almost a whole year I periodically took on the project and gradually completed it, and now, finally, the time has come to submit the final version to your court. Purpose: the use for the subwoofer channel was calculated.
Device diagram:
Construction order:
- Locksmith and carpentry works approximately 1 year ago. (Scooter)
- Installation of transformers, choke and existing elements, and their wiring. (Scooter, Ma $ ter)
- Break. (The ownership of this LUNCH stage is transferred to Ma $ ter).
- Since June 29, 2014 work began on the selection of the required voltage map, which were necessary for this circuit. Well, then setting up, wiring everything else.
- Debugging, tuning.
- Final touches.
- There is no time to light up the volume knob.
The photo shows the TA262 anode transformer, a choke, and TVZ TAN (no data). The incandescent transformer, which also forms the bias voltage, is in a separate compartment. In general, you can try to imagine the weight of LUNCH, but you will not succeed - in reality it is even more.
All voltages are in accordance with the circuit diagram. In addition to the output transformer (according to the scheme, some other one is used there). As for the power of the amplifier, at 25 watts, the quality is still sane, but at 35 you can already hear significant distortion, and 50 is most likely the limit. The speaker is used with a 25GD-26B speaker.
I want to say many thanks for the technical and moral support for setting up the power supply circuit, and combining it with the circuit of the ULF itself, as well as debugging the entire device, including testing Gamzan!
