Multimedia amplifier based on TDA1554 2.1
This amplifier is designed to create a 2.1 system, i.e. 2 broadband amplifiers + 1 more powerful, designed to reproduce only low-frequency signals.
The circuit diagram of the amplifier is shown in Figure 1, the printed circuit board drawing is in Figure 2 (not to scale). You can take a drawing in lay format.
Picture 1.
Figure 2. DOWNLOAD THE BOARD IN LAY
PCB FOR HIGH QUALITY POWER AMPLIFIER
This multimedia amplifier is designed to create an average audio system designed for stationary use.
The amplifier is based on the popular TDA2030 and not very popular TDA2052 microcircuits. Well, since we are talking about these microcircuits, it is better to dwell on each of them in more detail.
The TDA2030, according to the guide, belongs to the category of Hi-Fi amplifiers, but it is said to be too loud - its sound is somewhat non-Hi-Fi. Her more powerful brother, TDA2050, sounds much more pleasant. In terms of pinout, it completely coincides with the TDA2030, so you can make a replacement without changing almost anything on the printed circuit board.
The schematic diagram of the amplifier on the TDA2030 chip is shown in Figure 1, in Figure 2 - TDA2050 - the drawings are imported from the datasheet. The only thing that has been changed in the circuit is that there are no diodes from the m / s output to plus or minus power. These diodes are used to reduce the self-induction of a dynamic head, and few people dare to use this circuit with heads with a "heavy" cone, then the diodes were simply excluded from the circuit. A large batch of boards produced without these diodes showed that the amplifier works just as stably as with them, i.e. there was no effect on the operation of the scheme.
Picture 1.
Figure 2.
Of course, the denominations in the OOS circuit are different, but their ratio is almost the same, which means coffee. they have the same amplification. In addition, the TDA2050 OOS option is more preferable, since more current flows through smaller resistors, therefore it is less critical to interference and external interference. And yet - we allowed ourselves to shunt R5 with a 100 kΩ resistor and a 100 pF capacitor connected in series. This increases the stability of the amplifier and ensures the rolloff of the coffee. amplification at frequencies above 20 kHz.
The power supply of the amplifier was chosen as unipolar, since there is almost no deterioration in sound quality, but this fact opens up additional horizons:
- there is some saving of electrolytic capacitors in terms of power supply;
- when creating a multimedia amplifier using a bipolar power supply, the positive "branch" of the power supply is used to power the MF-HF link as an amplifier with a unipolar supply, and the positive and negative "branches" are used as power supplies for the amplifier for the subwoofer. Thus, the amplifier circuitry is not badly simplified.
If there is no desire to bother with a bipolar system, then you can use the bridge switching on of microcircuits, just let's correct that much more power is required from the m / s in the bridge switching. For example, when using the MF-HF link with the TDA2030, the bridge amplifier should be used with the TDA2050, but if the MF-HF amplifiers are based on the TDA2050 chip, then the bridge amplifier must already be taken based on the TDA2052.
Figure 3 shows a sketch of the PCB for one TDA2030.
Figure 3. DOWNLOAD IN LAY
Well, a few words about the amplifier on the TDA2052 chip. This is an integrated power amplifier that allows you to develop up to 40 watts at a load of 4 ohms. The circuit diagram of the amplifier is shown in Figure 4.
Figure 4
This is an amplifier with two inputs, but to simplify the design, the second input is simply not used. A sketch of the printed circuit board is shown in Figure 5. Figure 6 is a sketch of the TDA2052 bridge connection, and in Figure 7 is a sketch of the printed circuit board of the actual multimedia amplifier on the TDA2030 (TDA2050) and the bridge amplifier on the TDA2052.
The drawing of the printed circuit board of the power amplifier is one for all - DOWNLOAD.
Figure 5
Figure 6
Figure 7
Integrated four-channel power amplifiers.
How to quickly assemble an amp for 4 channels, and at the same time are not afraid to repair automotive equipment will be described here ...
We are talking about a number of microcircuits that have the same switching circuit, but different characteristics. Of course, they also have the same seal. Well, let's start in order:
In automotive technology, TDA7381, TDA7382, TDA7383, TDA7384, TDA7385, TDA7386 microcircuits are quite often used, somewhat less often than TDA7560. All these miracles practically have the same switching scheme, shown in Figure 1, but their characteristics differ somewhat, which is actually reflected in Table 1.
Picture 1.
TABLE 1.
| PARAMETER |
PARAMETER FOR MICROCIRCUIT |
||||||
| Type of shell |
FLEXIWATT25 |
||||||
| Gain coff, dB | |||||||
| Supply voltage, V | |||||||
| Output power at THD 10% |
25 45 |
||||||
| Output power at THD 1% |
19 34 |
||||||
| Maximum output power (a rectangular signal with an amplitude of 100 mV is applied to the input), this is exactly what is written on the "muzzles" of the radio tape recorder. |
50 80 |
||||||
| THD, %, at P=4W | |||||||
| Input resistance, kOhm | |||||||
| Diagnostics, pin 25 enabled. | |||||||
| Voltage at the control inputs MUTE and St-By to switch to the operating mode, not less than, V | |||||||
| Blue indicates the parameters for a load of 2 ohms, please note that only TDA7560 (!) | |||||||
| One nuance is indicated in pink - these microcircuits have a diagnostic output that is fed to the central processor, and if it is used in the radio tape recorder, then the microcircuit can only be replaced with one that has a diagnostic output, otherwise the CPU simply will not give permission for the volume and tone control to work, and some may even will not turn on ... Well, for the manufacture of a separate amplifier, this does not matter. | |||||||
Well, what kind of mikruhi sort of figured out, now the printed circuit boards for this four-channel:
Figure 2.
Figure 2 shows a sketch of a printed circuit board, a drawing in lay format, in jpg, in jpg the drawing is already expanded, i.e. prepared for laser iron. Jumper J1 is spaced apart in height, I just didn’t want to drag ultra-thin tracks between the pins, and making a double-sided board for such a primitive is also somehow not serious ... You can read a little more about TDA7384 and TDA7560.
Chips are heated quite well, and at least the operating temperature is more than 100 degrees. Purpose Don't skimp on the radiator.
And finally, a couple of words about the miracle that I managed to see, namely, the very original use of the amplifier on the TDA7560 in the car. 4 speakers 25GDN are installed in a completely flat cabinet, the height of which is approximately 170 mm. The length and width are adjusted to the size of the trunk of the classic. Phase inverter installed. The speakers are connected in pairs in parallel, i.e. 2 ohm load and connected to two outputs of the TDA7560. The remaining pair of outputs are connected to paired JBLs with a diameter of 160mm, i.e. another stereo set of 2 ohms installed in the rear shelf. Front acoustics from JVC head.
I really liked the course of thought of this needleworker - there is no pipe of unmeasured dimensions lying around the trunk, there is an order in the car 200 real watts and this is without any converters ... True, the radiator of the Mirkruha from some stationary amplifier, it looks like Lortovsky, only it seems to be higher ...
PCB FOR MULTIMEDIA AMPLIFIER ON TDA1554 & TDA1562
This multimedia amplifier is designed to create an average audio system and can be used both in a car and in a hospital.
The main disadvantage of the system is the somewhat underestimated value of the voltage boost capacitors, although the circuit diagrams of both amplifiers are taken from the datasheet - Figures 1 and 2.
Picture 1.
Figure 2.
In reality, the bass sound becomes much better when using C1 and C2 at 10000uF, but they didn’t bring the board to “mind” ...
By the way, nothing interferes, having slightly corrected the board, make a separate amplifier on the TDA1554 or TDA1562.
Figure 3 shows a drawing of the board (not to scale), the same in lay format.
Figure 3
Details on how much power a power supply is needed for a power amplifier can be viewed in the video below. The STONECOLD amplifier is taken as an example, however, this measurement gives an understanding that the power of the mains transformer can be less than the power of the amplifier by about 30%.
DID NOT FIND WHAT YOU WERE LOOKING FOR? GOOGLED:
What program to open the lay file you can choose from the list below!
LAY files- are used to design electrical boards and circuits and are created in the Sprint Layout program.
All files that are made in the Sprint Layout program are automatically saved with the LAY extension. As a rule, they contain various electrical circuit diagrams.
Files with this extension can be used to transfer and store PCB designs. Files with this extension are well known to everyone who works with printed circuit boards. It is thanks to them that clear schemes are drawn up, according to which the assembly is then carried out.
Files with the LAY extension can be read by all versions of operating systems from the Windows family. Sprint-Layout is constantly being improved by developers, but the extension remains unchanged. Of course, in addition to Sprint Layout, there are many other software that open files in the LAY format. You will learn about them on the pages of this Internet resource and will be able to choose a program that will be convenient for you to use.
Did you receive an email in LAY format that is impossible to read? Does the computer's operating system report that such a document is not supported? Is access blocked? Then our site will be a godsend for you! Here you will find detailed information about programs that allow you to open files with the LAY extension.
Now you know how to open lay and what programs to use for this!
We all love to assemble circuits, but not everyone wants and knows how to breed printed circuit boards. Most often, we look for a finished seal on the Internet and in most cases we find it. It would seem, go ahead, poison and solder! But not everything is so rosy, because often these found seals look like this:
No signed element. A complete puzzle, a riddle! And, it seems, turn on the “mosh” and stuff the elements, because the circuit is at hand. But the program was created to make life easier for us, and not vice versa.
Therefore, I will briefly, from the basics, tell you how to approach the layout of the board in Sprint-Layout, so that later you don’t have to guess what kind of detail I stuck here. Let's do it right now!
You won’t cover everything in one small article, I’ll go over some of the main points. So, we create a new project, set the name of the board and the estimated size (it is easy to correct it later).
Be sure to select the appropriate working grid.
Be sure to understand the layer system in the program, understand how everything works, use the photo view.
Let's start adding details to the board. At this stage, you should not confuse the values \u200b\u200bof “Type” and “Nominal”, later I will tell you why.
Now we move the element symbol closer. If necessary, you can rotate it by selecting it first.
Our board is already quite ready for fabrication, but why should we overload the solution with excess copper?
No need! We will minimize the area of etched copper. To do this, select all the elements on the board and click the "Metalization" button at the bottom of the program window and change the value to an acceptable one, for example, 0.5 mm.
And if you need a thermal barrier to facilitate soldering on large polygons? We choose drawing tracks and draw a thermal barrier.
Everything is drawn, we can admire the result by pressing the "photo view" button.
Nuance - you can edit the size of the labels of the elements individually, for this, select the "victim" and click the properties button on the right. The settings are quite extensive. However, it is better to set all labels in the same style.
It's time for cosmetics. So that all drawings of elements on the board have a uniform look and line thickness, we do the following:
1. select the layer with the marking of elements;
2. turn off the track layer;
3. select all (ctrl+A);
4. we adjust the thickness of the lines of all elements at the same time;
5. Activate the track layer again.
Now let's remember the beginning of the article and find out why you shouldn't enter the value of the element in the field for its type. Everything is simple, it turns out that when adding elements, we have already formed a list of elements!
Of course, a more correct practice is the supremacy of the scheme in the project, then the creation of a list of elements is the business of the program for drawing schemes. In the software package from ABACOM it is sPLAN.
Editorial note
A simple, but at the same time very effective software package for the design and manual layout of printed circuit boards of small and medium complexity. The program is very popular among Russian radio amateurs.
The main advantage of Sprint-Layout is an intuitive interface that includes only the most necessary tools for preparing printed circuit boards measuring 300 by 300 mm. The program allows you to work with two layers (conductors and markings) for each side of the board. Additional features - solder mask layer, metallization, SMD mask. The built-in tracer only helps route conductors, and is not automatic. The growing library contains the most common electronic components. Sprint-Layout has the ability to export the results of work to popular Excellon and Gerber formats, as well as create an HPGL file for PCB finishing on a software-controlled milling machine. The package is widely used for .
The program is unlikely to be suitable for professionals, since its capabilities are limited to small boards with a low density of elements. But, thanks to its logical and understandable structure, Sprint-Layout is very easy to learn and is recommended for beginner designers who do not want to spend their time learning more complex programs.
The language of the program is German or English. Domestic enthusiasts created a fully functional Russified version of the program, which received the name Sprint-Layout 6 on the network (but has nothing to do with the official version 6, released in 2013). The interface has been redesigned for greater convenience, a large number of electronic components have been added, and compatibility with all original versions of Sprint-Layout up to version 5 has been maintained.
You can read about the innovations of the 6th version of Sprint-Layout in the article:
The program works stably in 32-bit or 64-bit operating systems Windows 98 / ME / NT / 2000 / XP / Vista / Win 7 / Win 8
Distribution of the program: Shareware (paid), price - 40 euros
Official website of Sprint-Layout: http://www.abacom-online.de/uk/html/sprint-layout.html
Sprint-Layout file formats: LAY, LAY6, export to Gerber or Excellon
Download Sprint-Layout 6.0 (unofficial Russian version, actually 5.0)
Many are familiar with the technology of wiring and creating printed circuit boards, such as. But what to do when the scheme is too complex and voluminous? Here you will already have to master more modern methods, one of which we will get acquainted with here. Take, for example, the circuit of this sound probe:It makes no significant difference whether we will breed the board on a piece of paper in a cage, cutting out templates of parts with leads from cardboard (although I deeply doubt that anyone will use this method in the 21st century, when every home has a computer), or we will use some program for PCB layout, for example sprint layout. Of course, with the help of sprint layout it will be much easier to do this, especially in large schemes. In both cases, first we put on the working field the part with the largest number of leads in our case, this is a transistor, let's say VT1, this is our KT315. (A link to the sprint layout user guide will be provided below). Moreover, at first, when designing, your printed circuit board may resemble a circuit diagram, it's okay, I think everyone started like that. We put it, then we connect its base and emitter with paths with resistor R1, we also have the base VT1 connected to the output of the capacitor C1 and the output of the resistor R2. Instead of lines in the diagram, we connect the leads of the parts with a track on the printed circuit board. I also made it a rule to count the number of leads of parts connected on the diagram and on the printed circuit board, we should get the same number of connected patches.
As you can see, 3 more pins are connected to the base on the board, as well as on the diagram, they are marked with red rings on the diagram. Next, we install the VT2 transistor - this is a kt361 transistor, it has pnp structures, but we don’t care at the moment, since it also has 3 outputs and is in the same package as kt315. We installed a transistor, then we connect its emitter to the second terminal R2, and the second terminal of the capacitor C1 to the collector VT2. We connect the VT2 base to the VT1 collector, install patches on the board to connect the VA1 speaker, we connect it with one output to the VT2 collector, and the other output to the VT1 emitter. Here's how everything that I described looks on the board:
We continue further, we install the LED, connect it to the output of BA1 and to the emitter of VT2. After we install the VT3 transistor, this is also kt315 and connect it with a collector to the cathode of the LED, we connect the VT3 emitter to the minus power supply. Next, we install the resistor R4 and connect it with tracks to the base and emitter of the transistor VT3, we start the output from the base to the X1 probe. Let's see what happened on the board:
And finally, we install the last few details. Install the power switch, connecting it to the power plus with a path from one patch and with the VT2 emitter, a path from another patch connected to the switch. We connect this output of the switch to the resistor R3, and connect the second patch of the resistor to the contacts of the X2 probe.
