Schemes in stereo mode with single and twisolar nutrition

The TDA7265 chip is a powerful two-channel Hi-Fi AV class amplifier in the Multiwatt case, designed for high-quality stereo equipment, Hi-Fi music centers and televisions.

Simple inclusion and high scheme technical specifications Made a TDA7265 microcircuit with a very balanced and popular solution when building high-quality audio equipment.

Characteristics of microcircuits

• A wide range of supply voltage (up to ± 25 V);
• Bobbing nutrition;
• High output power 2x25 W;
• No noise when turning on and off.
• No sound mode (MUTE);
• Standby mode (STAND-BY);
• Low current consumption current;
• Defence from short circuit SHORT CIRCUIT GUARD);
• Overheating protection (THERMAL GUARD).

The limit parameters of the chip are shown in Table. 1. Main specifications Presented in table. 2. The inclusion circuit in the chip in stereo mode is presented in Figure 2.

Picture pCB For the stereo-version of the amplifier, shown in Fig. 3. The layout of the elements on the board is shown in Figure 3. Figure 5 shows a bridge circuit in turning on the TDA7265 microcircuit.

Fig. one. Appearance and the location of the conclusions (basement) of the TDA7265 chip.

Table 1. TDA7265 microcircuit margins:

Table 2. The main technical characteristics of the chip TDA7265 (U \u003d ± 20 V, R \u003d 8 Ohm, R \u003d 50 Ohm, F \u003d 1 kHz, T \u003d 25 ° C).

Typical inclusion scheme

Fig. 2. Typical amplifier circuit on the TDA7265 chip (stereo option, two channels).

Fig. 3. Image of the stereo amplifier printed circuit board on the TDA7265 chip.

Fig. 4. The layout of the elements on the stereo amplifier board.

Bridge circuit inclusion

Fig. 5. Diagram of the bridge amplifier power on the TDA7265 microcircuit with bunching nutrition

Schemes in stereo mode with single and twisolar nutrition

Fig. 6. Concept of stereo amplifier on TDA7265 with bunching nutrition (typical inclusion from datasheet).

Fig. 7. Concept of stereo amplifier on TDA7265 with unipolar nutrition (typical inclusion from datasheet).

Standby and Mute modes

Based on the information in the datashee, we give an example of voltages to control the TDA7265 microcircuit, assume that the meals of the chips are + -20v, thus feeding the following stresses to the foot 5 chips:

• Standby - at a higher voltage than "+ vs - 2.5", in our example from 17.5 to 20V;
• Mute - at a voltage between "+ vs - 2.5" and "+ vs - 6", in our example from 14 to 17.5V;
• Play - at a voltage less than "+ VS - 6", in our example from 0 to 14V.

It turns out that in order for the amplifier constantly included (PLAY) And it was not necessary to collect the STANDBY-MUTE control scheme, it suffices to connect the leg 5 chips to the total (0B).

Literature:

• Bashirov S.R., Bashirov A.S. - Modern integral amplifiers.
• Documentation, datasheet on the TDA7265 chip: download (256 kb).

• PCBway - only $ 5 for 10 printed circuit boards, first order for new customers free
• Build printed circuit boards from $ 88 + Free shipping worldwide + stencil
• Online Viewer Gerber Files from PCBway!

Comments (98):

# 1 Said June 19 2011

Tell me, please, what is the "standby mode" function?

# 2 root June 20 2011

This is when the power of the amplifier circuit is permanent permanently, and the microcircuit switches to the mode in which the output cascades and currents consumed by the scheme are disconnected, decreases to several milliamperes. The function in foreign literature is called "stand-by". (in the Scheme conclusion 5 signed as ST-BY)

# 3 Said June 20 2011

Thanks for the information) and to go to ST-BY to this conclusion you need to feed food?

# 4 root June 21 2011

1) take into account that the scheme powered by a bipolar power source (+ Pete. / -pit. and general) !!!
2) Mute and Stand-by TDA7265 Functions:
The state of the amplifier is controlled by a voltage on the leg 5 relative to + microcircuit power (+ vs).

1. level higher than + vs - 2.5v gives us stand-by
2. level in the interval between + vs - 2.5V and + VS - 6V gives us Mute (turning off the input signal)
3. level is lower than + VS - 6V gives the operating mode Play

And to translate the amplifier in work mode You need to connect the 5th leg of the chip to the total (land or 0).

# 5 Said June 22 2011

That is, to use these modes, I need a bunch of windings on the transformer?

# 6 root June 23 2011

Yes, namely 3: one primary 220V and two seconds on 17B, after straightening and capacitors there will be 2 voltage channels for 25V.

# 7 Said June 23 2011

so for a stand-bia and disconnect sound too need windings?

# 8 root June 23 2011

No need, with Stand-BY mode inside the chip, the output cascades are simply disconnected and it goes into the waiting mode, the power remains that.

# 9 Said June 23 2011

And on the 5th leg of 6 volts where to serve? And how to switch for example from scratch by 6 volts to go to Mute mode, via switch or do you need any double switch?

# 10 root June 24 2011

To use all modes to 5 legs, you need to finish a small scheme on one transistor, that's what it looks like:

Details for microcham control node:

• Q1 - BC107 You can try to put 2N929 or Soviet CT3102;
• R2, R4 - 15KOM;
• R1 - 10KOM;
• C3 - 1MKF;
• DZ - Stabilirt for 5.1V, for example: 1N751A, 1N5993B, BZX55-C5V1 or Soviet 2C102A;
• SW1 - two-position switch;
• SW2 - button with fixation.

# 11 Said June 24 2011

# 12 Dmitry August 09 2011

Tell me, please, the power source should be stabilized or not stabilized?

# 13 root August 09 2011

You can not stabilized. A fairly ordinary two-polar rectifier with condensers 2000-10000 μF at the output on each shoulder (+/-).

# 14 Dmitry August 09 2011

Clear. Thank you

# 15 Ivan February 12 2012

And where is the common power to connect and how much free 2 peelarine is needed?

# 16 root February 12 2012

The general is connected to the 9th leg of the chip, all elements with the same designation are connected by one track and are common. The table above it is written that the limit nutrition + -25B, feed 20-24V and everything will be OK.

# 17 Ivan February 16 2012

Thank very much. I understand that the total (cf. wire) is connected to the mass) of the 2Pore source. Between media and any extreme 12v?

# 18 root February 17 2012

thank you. These in-shops are not for me. I will look for yourself. Now at least I will know the power. thanks again.

# 24 Mish July 08 2012

And why on concept Electrolytes for 16V, with UPIT 25V?

# 25 root July 10 2012

Fixed. Capacitors C3 and C5 are included in nutrition as additional smoothing, except for them in the rectifier (from which the amplifiers feed) should be the capacity of 2000-10000mkf for each shoulder, as I wrote before.

# 26 Maxim December 08 2012

Tell me for the confusser in the C9-5600 scheme

# 27 root December 08 2012

Condenser C9 \u003d 5600 PF (picophaderad) \u003d 5.6 NF (Nanofarad).

# 28 Andrey December 13 2012

If I make just an amplifier then stand-by do I do, and for what speed it will give 25 watts?

# 29 Root December 13 2012

You can do without STAND-BY, read the 4th comment.
The amplifier issues 2x25 watts on the load of 8 ohms.

# 30 Feliks May 22 2013

Is it possible to make a balanced (symmetrical) input in bridge mode?

# 31 Igor July 08 2013

Strange on one of the forums you write that this is an excellent scheme for S30 columns, but they are 4th, how will it feel?

# 32 Igor July 08 2013

And there is still a question, exit from a laptop, Jack 3.5 soldered immediately to in L in R

# 33 ROOT July 09 2013

The Radiotehnika S-30 columns were produced in two modifications: S-30 (4 Ohm) and S-30B (8 Ohm). Most often I met precisely S-30B. In addition, if there are four S-30B speakers, they can be included in parallel in parallel - it will be loaded on two channels by about 4 Ohm, such a solution works very well, verified.

output from a laptop, Jack 3.5 solder immediately to in l in r

Output level sound card Enough to feed on the input of this amplifier. I recommend to enable a dual variable resistor to adjust the volume or electronic groobod (adjustment of the volume and RF / LF frequencies, optionally) on the amplifier input.

# 34 Igor July 09 2013

Thank you, I have 4 ohm if I have the way out of the usual Soviet resistors of MLT 4 Oma to catch up to 8 ohm loads work?
thanks for the help

# 35 ROOT July 10 2013

It will work, but with big losses in power, and you need it?
In most cases, manufacturers The output parameters of the amplifier are written for 8 ohms, and 4 ohms can most likely be connected. For this chip in the datashet, it is clearly not clearly indicated that the load with the impedance in 4 ohms cannot be connected.

Connect your 4 ohm columns to the amplifier and do not be afraid of experiments - everything should work. Listen and if you appreciate whether such an option is satisfied with the quality of the sound, and there you will need to think if you need to change something.
In this case, you need to take care of a good radiator for the chip, since the load on it will increase and heat dissipation, respectively, too.
So that in the process of adjustment does not burn acoustics (anything can happen). Turn the fuses for 0.5-1 amp sequentially to the ONLC output, it will help if it goes wrong. Then after adjustment, the fuses can or remove or put on a larger current - 2-2.5a.
It would also be nice to assemble a scheme for the protection of AU (acoustic systems) from overload and inclusion delay. Here are some schemes of such simple devices: schemes of devices for protecting acoustic systems (AC)

# 36 Feliks July 10 2013

So that! - About the balance entrance?

# 37 root July 11 2013

about the balance entrance?

You can try to include as in this topic on the Vegalab where the bridge symmetric UMLC is collected for subwoofer using integral amplifiers: power amplifiers

Found on one forum Bourgeois scheme to OU:

Collect better unch without an OOS on the transistors, here for example: three-penetrating umzch (574ud1a, at the exit - KP904)

By the way, here is the original of this scheme since the 90s:

# 38 Feliks July 11 2013

I have amplifiers. From microlabs 2 on TDA7265. I walked all the way ... it works ... but doubts are still allowed ... It turned out the "true" balance entrance or "something like that"! Confuses that the output with sound - balanced (symmetrical), there was 1 signal - Phase, 2 Signal in antiphase ..., and the input of the amplifier is turned out to be unknown to what! So tormented ....
Yes, by the way: In the bridge connection, with a load of 4th, the volume managed to add only half a half ... some kind of protection on the povel is triggered. Connected a successively one microlab - everything is wonderful - normal, "live", "Soviet (USSROV) :-)" 25Vatt on the canal.

# 39 Igor July 11 2013

I have another problem. I understand correctly to feed the amplifier to TDA 7265 you need a transformer at least 4 amps, this is a huge heavy, and there is no whole on sale \u003d (

# 40 Root July 11 2013

Well, not very heavy it will turn out, it is best to use toroidal - it is a miniature and efficiency good.
In the comments # 20, I brought a link to an article about how to make and calculate the rectifier, picking up a transformer to it for the desired voltages. Order a transformer in our time via the Internet will not work, I think through search engines You can find the bestiable shopping store or order. You can find iron and wind yourself - but this is another story.

# 41 Igor July 12 2013

Found in the description, this does not mean that the current consumed max 130mA and that at the supply voltage + -16v, it will work on resistance in 4 ohms?

# 42 root July 12 2013

This means that the resulting reservoir of the chip from 80 to 130 (MA). In loaded working condition, the microcircuit can consume up to 4a. Also in the datashitis for example, the values \u200b\u200bof the harmonic coefficient under load 4 Ohm and power +/- 16B are given. You can use this supply voltage, and you can try more, with a larger supply voltage and the load in 4 ohms is the probability that high volume In the microcircuit will be triggered. More practice, and theory to help!

# 43 Alexander September 26 2013

Such a question: Here we are able to have 3 wires from the trance, 25 volts should be between the earth and the ends, or between the ends?

# 44 ROOT September 26 2013

If three wires are most likely two transformer windings are connected in series, you only need to calculate the wire where this connection is made. Tester take a tester to measure alternating voltage and measure the voltage between the wires in different sequences. It will turn out for example, if in the transformer of the winding of 10V like this: between the 1m and 2m wire 10V, between 1m and 3m - 20V, between 2m and 3m - 10V, from this it turns out that common for windings 2nd wire. Everything like common (earth) for rectifier Using 2 wire wires. and connect the rest diode bridge, condensers ...

# 45 Alexander September 29 2013

No, with where, where did the general wire, I figured out, another question interests me, between the general and the rest of the end, how much should it be? those. 12.5? or 25 volts

# 46 Alexander September 29 2013

I can not figure out, I just have 10 conclusions on the trance. There is a combination: 1 2 and 10 conclusion, between 1 and 10 I have 50 volts, between 1 and 2 I have 25 volts, between 2 and 20 I also have 25 volts .... and if the conclusions 3 4 5, between 3 and 5 I have 25 volts, between 3 and 4 I have 12, 5 volts, between 4 and 5, I also have 12, 5 volts, which one to use?

# 47 ROOT September 30 2013

Drew a pinout in your transformer:

1) Look inscriptions on the transformer, you may find it labeling and type - then try to search the Internet documentation on it. You need to know what current into the load can give windings of this transformer.

2) Since the minimum for TDA7265 - +/- 5B, and the maximum +/- 25 can you can use only 12.5V windings. After the rectifier, you will have a two-screw voltage about 17-18V (12.5 * 1.4). The windings of 25V cannot be used for this chip, since the output will be a two-oxide voltage about 35V (25 * 1.4).

The secondary windings of the transformer must produce at least 3 amps, better - 4 amps, for this amplifier so that at a voltage of 12.5V. this schema And get the expected return from it.

Very good winding, if everything is OK with currents, then you can collect a fairly good UHC scheme, you should not climb on TDA7265.

# 48 Alexander October 03 2013

So, dealt with it. Now another problem is a lot of volume begins to snatch Ugra, I thought about the case in the column, but I put a column for 50 watts - she also starts to snore, even on a quiet volume .. I measured the current winding of the transformer, I don't know how to maximize the current, but 3 amps exactly squeezed. .. When measuring the current consumed by the UHC, the maximum of 0, 9 amps was given to 0.8, it starts to snore ... also measured the voltage to amplifiers, during snatching - 21, 6 volts ... and when quiet sound 25.4 volts .. Tell me what could be the cause of snoring?

# 49 root October 03 2013

when snatching - 21, 6 volts ... and with a quiet sound of 25.4 volts

It seems that the power of the transformer is missing, with a large load, the voltage is very much.

# 50 Alexander October 03 2013

Hmm ... strange ... And why does ONCH eats only 0.9 eh? Although the trance gives me at least 3 amps?

# 51 root October 03 2013

It can be assumed that when the voltage is sent in the chip, the protection is triggered or the parameters are "floating", because of this it is impossible to split the UNG.

although the trance gives me at least 3 amps

Measured an ammeter shorting the transformer winding? - So at all is not true, the short circuit current and current under load are different things, 1st is always much higher. It is best to enable a powerful variable resistor to the ammeter consistently so that the current can be adjusted, and in parallel with the transformer winding also turn on the voltmeter. Now load the transformer twisted the resistor handle and look at the current when it reaches approximately 1a, we look at the voltmeter as much as the voltage cares. Sailing should be minimal, then we try to load even more.
In general, as I wrote before, see the marking of the transformer, if it is, type it in Google and read the parameters of the transformer - it will immediately become clear that it can.

# 52 Alexander October 03 2013

I just measured with a resistor, though it looked after this)) (resistor), put a powerful, Soviet Trans TN 61-220-50K ... It seems that the sound has become better, it has become less ... but I have it I connected to the phone ... And when I connected to the computer, I generally know how it does not know that the bats are none :(

# 53 root October 04 2013

TN 61-220-50 contains 4 secondary windings each approximately 6V and load current 8a.
1) First of all, check the inclusion of the windings. To build a two-polar power supply unit, it is necessary to correctly connect the secondary windings, in the connection it is important to comply with the "beginning" and "end" winding. You need to connect the windings in pairs, and then these pairs to connect together to get this scheme (a) - 6V-6B - (b) - 6V-6B - (B). Between (a) and (c) there must be voltage equal to 24V. Between (a) and (b), as well as between (b) and (B) - 12V.
2) Perhaps UNG is overcame. Try to shorten all the conductors as much as possible, place the input chains as far away from the weekend.
3) It happens that such that the chip came from the defective party, there are nothing to do anything here, you need to try another.

# 54 Alexander October 04 2013

Everything, almost corrected the problem, did not put the initial condenses to the inputs ... Another question is why the electrolytes are indicated on the audio input? (7 and 11)? I just when I put the electrolytes I had a bad sound, played in the frequencies of the network :)) And with the trance, I did it in the end, it turned out 16 with a speaker of the volt, and it works also, or rather not quieter than 25 volts, + the microcircuit is almost not heated Even at the maximum. Somewhere I read that for 4 ohm speakers, more than 16 power should not be included

# 55 root October 04 2013

In most uNF schemesI met, polar electrolytic capacitors put on the entrance (by the way, in the TDA7265 datashet, they also stand at the inlet of electrolytes), and some even met non-polar electrolytes. I think that it is best to put on the inlet of mica condensers for 1-2 μF, try ...

# 56 Alexander October 04 2013

Duck I put on 3.3 μF normally everything worked and the bass appeared and snatching disappeared, now it's more or rather heard when the speakers do not stand, but this is another conversation) Thanks for the consultation))

# 57 Alexey December 01 2013

Bought a ready-made fee on TDA7265 with two-polar nutrition, on radios.
According to one in one with your posted here.
Launched .. work .. but!
In the columns heard a noticeable transformer work background

BP composition:
Transformer: with Odyssey-002 (2x17V) - Cost. Ideal
Diode Bridge: BR610 (new)
Stabilization fee: (for tembroblock)
PERD RENTs Installed 4 condenser
2x6900x50v + 2x0.22mkf
From these same capacitors, feeding with wires is suitable for a ready-made UNUC card, on which the 2x1000mkf X 25V capacitors are installed in your datashee

P.S: In the book of Turute, he met the order of these TDs that the corders of the larger capacity are recommended to be installed near the Microud itself.
Do I think right?
How to eliminate the created problem?

# 58 root December 02 2013

1. Signal cable from unch to the signal source must be shielded!
2. Check if there is no press from the source of the signal, try using a signal from the player or smartphone.
3. Try replacing the input capacitors on the saliva or ceramic with a capacity of 1-3 microf.
4. Reread comments above ...

# 59 Eugene January 10 2014

The guys please tell me what and how to connect to the TDA7265 chip there is, there is a trans like Meryl issues 14.1V there is a board from the MC, on which the chip was stood! What to do I want to start but I don't know what! I read a lot there are a bunch of head but not much Clear! Who can tell plz! Formerly thanks!

# 60 Andrey January 28 2014

Do not tell me, the power supply from the computer can be taken as a power source for this scheme ??? There seems to eat +12, -12, general outputs.

# 61 root January 29 2014

Without alteration computer block Nutrition for this scheme will not be able to use.

# 62 Alexander February 01 2014

Root, good day ... Something consulted about the UNG, there is no type of bass, snacks ... This time I gathered a UNG converter from 12 volts to a two-oolar +/- 25 volts .... and trans power itself The twilitors earned after such operations earnings earned as it should, the bass is clear, the depth of sound is heard .... therefore I advise the converter to collect it .... for the trans from 220 volts need large dimensions, and not always at hand it turns out to be .. In general, the amp is cool, I advise everyone to collect ....
But now, perhaps, the only question will be why the peak current is written in the datashee, as much as 4.5 amps, and it consumes a maximum of 2? Although the power is excellent?
I just immediately apparently the transformer was very weak ... I somehow counted 3 amps of the current output in it, and it turned out that with this voltage he is less ampere ... Thank you!)

# 63 root February 01 2014

Hello, Alexander. Thank you for share your experience and experiments. The scheme of this UNG on the TDA7265 is often found in expensive and high-quality acoustic systems and studio monitors, see the amplifier is really not bad in all parameters.

To measure the peak current consumed (this is often a short-term current, a duration of several milliseconds), special devices are needed, a multimeter such a parameter cannot be obtained. As an option, you can try to file a very low frequency signal-sinusoid signal and then to measure the current multimeter on each shoulder - and most likely we will not get a true picture.
To assemble the transformer rectifier to such power, you will have to find a very powerful transformer (4.5 * 25 * 2 \u003d 225, with a reserve - 280W), moreover, so that there are no sections for each shoulder to put condensers for 40,000 - 100 000 μF, It would also be nice to collect a two-pepolar voltage stabilizer.

In your case pulse converter All these problems decided - high power, stability and small dimensions.

It would be nice if you have shared a scheme with a description of your converter from 12V in 2x25v.

# 64 Alexander February 01 2014

Well, I collected the converter from the site http://cxem.net/sound/amps/amp138.php
The only number of turns is different ... In our case, on the secondary winding, I made 10 turns in 3 veins 2 windings with a wire of 0.8 mm ... It turned out a transformer about 100 watts .. Voltage turned 23.1 volts to each shoulder ... as I was told, this is quite enough, since 25 volts are not recommended on the shoulder, due to the fact that this is the limit value of the voltage ..

# 65 Alexander February 02 2014

By the way, there are 4 ohmic columns, my opinion is better not needed with a big voluntary to use them, because I have at 23.1 volts by 70 percent of the volume of Microud in defense stood ... Protection This is certainly good, but not excluded burning ... so What I do not advise anyone ... Better the voluntary is less to do, as in the datasheet ..

# 66 Valery December 26 2014

Hello! Tell me where to dig? The device LG LM-M1401X The TDA 7265 amplifier replaced UNUC turned on and the power burned into normal

# 67 Root December 26 2014

Valery, review the printed circuit board and all connections, including conductors in isolation - perhaps something paid and closed. Also check all the parts of the amplifier, perhaps some component is faulty - the microcircuit is overcited and fails. Way out and check the electrolytic capacitors test.

Please: with similar repair issues, please contact us on the forum, let it be not to clog the topic on the UNUC assembly.

# 68 Nikolay July 30 2015

And the printed fee is in the bridge?

# 69 Root July 31 2015

Pricing fee here for a two-channel option, look:

# 70 Hello January 15 2016

Hello everyone people, the question to the Cognobs of the Umzch: Can TDA 7265 develop the power at 100W with the resistance of the 4th speakers if it develops 50 wat 25x25 at 8 oral Not enough for this amplifier?

# 71 root January 15 2016

The TDA7265 chip will not produce 2x50W on 4 ohms because it has built-in output current protection (Output PEAK Current Internally Limited), on 4 oks, it is possible that it turns out to squeeze 30-35 watts. In the case of using a 4th load, you need to worry about a reliable heat sink for the chip, and the food should not be too high - 15-18V on the shoulder.
Why is the microlab speakers 32 + 16V 50W transformer? - After the rectifier and capacitors on each shoulder will be 16 * 1.4 ~ 22 tight. Most likely, not many load these columns lastively for all power. The transformer can withstand the 60Vatt load, the windings will begin to warm up a bit.

# 72 Hi January 15 2016

It is a pity, but the power supply does not seem to me to give me 60 wat as, I don't have a lot of 51 wt, I don't seem more than 51 wool ... But it seems to me if the amp at least up to 60 wat can give it the power supply to him would you put more bigger? Causes of wheezing on Max Volume I have a izz what could be? because of food after all?

# 73 root January 15 2016

If it is possible to install a more powerful transformer, it will definitely not hurt. And the cause of wheezing may be:

• weak transformer;
• burned chip;
• overheating of the chip and the inclusion of internal protection (bad thermal paste, the microcircuit is poorly fixed or a small radiator);
• non-quality capacitors in the system;
• damaged coils of speakers, garbage in the speakers;

other.

# 74 Hello January 16 2016

100% It seems to me that the trans column inspected immediately fly as new recently bought Conder himself also changed the most powerful, the overheating can not be because it starts hoarsely as you turn on, well, the tannenka, too, vryatli a new column bought half a year ago The thermalcolus changed .. Today I wrapped the trans at 176 wat inserted and went nuts as I had a speaker. One burned 30 Mathhouse managed to listen to half an hour without wheezing at Max and the power was significantly increased like that.

# 75 Dmitry January 19 2016

root, good evening. I carefully looked at this topic, I liked how you are responsible, with explanations and intelligibly. I have questions about Mix. 7265 and 7269. I would like to combine them for 2.1 amp.

The question is: disassembled dVD player, There are 7265 microns (1 pcs) and 7269 (3 pieces), there is also a Sab from this player and the 2nd columns (from the music center of 30 W. 6 ohms), is it possible to make a scheme for 2.1 Avenue with these chips? To put 7269 on a subwoofer, and 7265 on 2 channels on the speakers?

# 76 Eugene January 20 2016

root good day, now I am alieveing \u200b\u200bthe ROYAL 1 loss, and there are a number of questions on the work modes TDA7265, namely:
1) The scheme that you showed in the post # 69 there is a jumper stand-by (what is the mode of her work?), The question is next, this is exactly Stand-BY, not MUTE Case?
2) Is it possible if it is possible to implement the input and output from STAND-BY through one single switch (it is 5 legs) (meaning a dual potentiometer with an optional switch when turning)?
3) In the Data Sheath, the diagram is divorced with the separation of land for nutrition and a signal, how will this affect the sound in the scheme of the represented? If it is fundamentally how to pull the signal land if the wires are only two and in the RCA, the output from the screen is not meant?
Thanks a lot in advance.

# 77 root January 20 2016

Dmitry, it is important to notice that the TDA7269 can only work in stereo mode, and TDA7269A - can be included in the bridge. TDA7265 - both in stereo and in the bridge.
In your case I see two options:

1. TDA7265 on a bridge circuit for a subwoofer (about 25-35W, meal 16-18B), and for satellites - TDA7269A in a bridge 2 pcs (if you have TDA7269A, approximately 20W, power 11-12V). If you have a TDA7269 (without index a), you can do the same chip, but the power satellites will be about 10-14 watts (16-18V nutrition).
2. The TDA7269A in the bridge mode on the subwoofer will be approximately 20 W (12V nutrition), and TDA7265 - for Satellites for 25W (24-22V).

The TDA7269 and TDA7265 chips are included in the same diagram, so that the printed circuit boards can be used alone.
During the bridge, the microcircuits need to pay attention to the recommended values \u200b\u200b"Power supply - load resistance", since at a very low load resistance and a large supply voltage in chips will operate internal protection (peak current threshold at the output 4,5A).

# 78 root January 20 2016

Eugene, the management of the modes is described in the comments # 4, also added an example at the end of the article so that everything was clear.
To use only Play and Standby modes, you can collect the adjustment stabilizer on the chip, at the output of which to set the voltage to go to STANDBY mode (with 20V power, it will be 18-19V), then to switch between modes, you can use a simple switch to two positions. In an embodiment with a dual potentiometer, to control the same section of the potentiometer by a stabilizer by a stabilizer, to fit the resistance to all work as needed and the resistor did not heat the taking into account the stabilizer scheme.
The separation of common for nutrition and entry is good, but for this scheme is not very critical, the length of the tracks is not large and currents are not very large, if the tracks are thorough, then one line of the earth (general) will not have a strong influence.

# 79 Hello January 20 2016

hello, I have a problem, I wound the trance checking the tester shows 16 volts. Ie 16x2x3 3 amps and all romel doubt scrolls native block It was burned with a 16x2x1.6. Why so wound more powerful and on almost max volumes appear wheezing as if the food seems to check the drawing food drawdown, except that 0.5 volts ... Maybe I needed on 25x25 volts to wind ???

# 80 Evgeny January 21 2016

root, thank you very much for the answer, brought to my thoughts to drive this part of the scheme in the simulator, it was possible to achieve the following result. Over the way, exactly what I wanted.

# 81 root January 21 2016

... Hello here I have a problem ...

Perform all recommendations and checks that previously replaced, replace all electrical in the diagram, replace the thermal paste and securely attach the chip to the radiator. As I wrote before, it could be that the chip goes into defense under the load of 4-6 ohms - try to reduce the supply voltage to 13-16V on the shoulder (on secondary windings transformer approximately 11-12V).

# 82 Hi January 23 2016

I found a problem, it turns out that the food will seek at the second output after the considera, replaced the Conder all pure trance now 100 wat squeezes the sound at all clean and nice to almost max volume, more max already speakers are not kept ... so the people in the factory speakers need to be changed immediately to more powerful and you will be happy !! 1 ____ 0000) _)))

# 83 Artem January 30 2016

Hello! ROOT, please tell me. Somehow for a long time, I disassembled some kind of household cinema, and removing from there a fee with three TDA 7269A and one 7265 apparently system 5.1 was. and a toroidal transformer on which there are two windings of 13.5 volts 3.4 amps. It is now called a grand hybrid amplifier project 2.1 on TDA 7259A (in stereo mode) and TDA 7265 (bridge) so the question itself. Whether this transformer is enough for sufficient power supply to these microcircuits on the load of 8 ohms. And how will microcircuits behave with 4 Ohm? And another question. On the printed circuit board that you laid out above there is a jumper of the standby. We are blurred - an amplifier in the standby, closer - a microcircuit in working mode. right? I apologize in advance if the questions are stupid. On the night, the head is tightly concerned)

# 84 root January 30 2016

Hello. According to STANDBY, everything has painted above. The transformer is quite powerful, but at maximum load from 3 microcircuits may be not enough. After the rectifier and capacitors, it turns out about 18-19V, for the 4th loading is a bit too much, based on the recommendations from the manufacturer of chips, if you do not plan to ship the amplifier at the maximum, it is quite operational. Collect the power supply, plug the amplifier on the TDA7265 (bridge) and check how it will behave on the load 4, and then there will be food for reflection. Theory and practice do not always go along one path.

# 85 Artem February 02 2016

microcircuits are not three will, but two.

# 86 Artem February 11 2016

recently remembered that there is a TN-60 transformer, which has 4 windings of 6.3 volts. I use it better. And the straightened voltage is slightly lowering will be 16 volts (which would be boldly 4 Ohm cling if necessary) and the currents of it are good (about 6 amperes on each winding) that will give a good power supply supply of BP.

# 87 Dmitry February 22 2016

Hello. And the volume control can be added here? And where to turn it on

# 88 root February 23 2016

# 89 Bober February 29 2016

Scheme-bridge. The factory fee-saw from the cinema and took the subwoofer bridge to 7265, Essnaly the subwoofer filters threw ... do not let the ground for 5 entrance !!! The protection is triggered. Yes, you can safely bold anything on 5 entrance not to give, and it works, but it is not 7294 ... much more modest.

# 90 Dmitry April 22 2016

Good day! Putting the transformer on 3a, and then adding another 1.5a, total 4.5a, then the controllers of bass and high to the whole, and the volume exceeds 12h. Starts wheezing, despite the dynamics in the 40W 80W and the squeezes on the 8th, plus the coil of the LF Total 6 is load. I read here, one wrote that there is a drawdown at the exit after the condenser. Question: What kind of condenser and where did he replace? I did not understand! Please help. And so by 12h. The sound is perfect with bass.

# 91 root August 20 2017

Dmitry, in your case, the nutrition of the chip should not exceed ± 16-18V. Also try in the power supply to install electrolytic capacitors per 10000MCF for each shoulder.

# 92 Sergey August 24 2017

Tell me, with a pavement scheme - the polarity of acoustics what, how to connect + -?

# 93 Root August 24 2017

Sergey, you can try to determine visually, and in the scheme.
If you look through the scheme: Minus dynamics connect to the channel, which is included in the antiphase, and plus to the channel to which the signal comes. If you look in Figure 5, it turns out: minus to the leg 2, plus to the leg 4.
Visual Method: When playing music with brightly pronounced drums, pick up such polarity at which at the time of the drum impact the dysfus dynamics squeezed out, and not inside.
If we have two amplification channels (2 TDA7265 chips, each in the bridge turning), then temporarily connect the inputs of the amplifiers and give a music signal there, look so that during reproduction of the drum, the speaker diffusers moved simphanly and outward.

# 94 Sergey August 24 2017

# 95 Ivan June 08 2018

hello! What is the maximum supply voltage when unipolar nutrition?

# 96 Root June 08 2018

Hello! The voltage for the scheme with unipolar power in the datashet is not specified, depending on the load resistance, it is not worth exceeding the values \u200b\u200bof 30-40V. With bipolar diet, the maximum is 25V + 25V, it is possible to calculate that during unipolar nutrition, it will be approximately + 50V.

# 97 ANTON January 19 2019

There is an amplifier 5.1 Defender Hollywood 90. The control board covered. Docked directly from the inputs to the SAB / active wires to the cabinet input of the abolition. The amp is there on the basis of TDA7265. De-energized MUTE. All played on Max Volume.
Question: How to make the volume adjustment on the channels? Thanks in advance.

# 98 root January 19 2019

Anton, Variable resistors can be applied to adjust the volume -.

The TDA7265 base amplifier refers to the AV class and is intended for use in Hi-Fi techniques. The TDA7265 chip is equipped with thermal protection against overheating chip crystal and short-circuit protection on the body or power bus. The MUTE and STAND-BY system is built into the microcircuit that allow to eliminate noise and cracks while turning on or off the amplifier power.

The output 5 in the chip controls the MUTE and STAND-BY systems if the output voltage is 5 -2.5 or higher (in a positive side) then the microcircuit works in STAND-BY mode, and if the voltage is in the range from -6.0 to -2,5V, the microcircuit is in MUTE mode. At voltage lower than 6V, the TDA7265 chip operates in normal mode.

The Amplifier based on TDA7265 (in the stereo version) has the following main characteristics:

• The supply voltage from +/- 5 to +/- 25V at the nominal supply voltage +/- 20
• Current of resting 80mA at rated supply voltage
• output power under books 10% and load 8 ohms at rated supply voltage is 25W on the channel
• 10V / ISS output rate
• SCs until the output power of 15W with a load of 8 ohms not more than 0.01%
• The temperature of the chip crystal at which thermal protection takes place 145 gr. Celsius

When using the chip in the bridge embodiment, it is necessary to use a load of at least 16 ohms (2 * 8 ohms) or 8 ohms but at no longer than +/- 16V.

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Most audio delivers are quite categorically and not ready for compromise when choosing equipment, rightly believing that the perceived sound must be clean, strong and impressive. How to achieve this?

Search for data on your request:

Amplifier at TDA 7265 do it yourself

Schemes, reference books, datashets:

Price Lists, Prices:

Discussions, articles, manuals:

Wait for the search for the search in all bases.
Upon completion, a link will appear to access the materials found.

Perhaps the main role in solving this issue will play the choice of the amplifier.
Function
The amplifier is responsible for the quality and power of sound playback. At the same time, when buying it is worth paying attention to the following notation, marking the implementation high technologies In the production of audio equipment:

• Hi-Fi. Provides maximum purity and accuracy of sound, freeing it from extraneous noise and distortion.
• Hi-End. The choice of perfectionist, ready to pay a lot for the pleasure of distinguishing the smallest nuances of favorite musical compositions. Often, this category includes manual assembly equipment.

Specifications that should be paid attention to:

• Input and output power. The nominal output power indicator is crucial, because Edge values \u200b\u200bare often unreliable.
• Frequency range. Varies from 20 to 20,000 Hz.
• Nonlinear distortion coefficient. Here everything is simple - the smaller the better. Perfect value, according to experts - 0.1%.
• Signal ratio and noise. Modern technique suggests the meaning of this indicator over 100 dB, which minimizes extraneous noises when listening.
• Dumping factor. Reflects the output resistance of the amplifier in its ratio with the nominal load resistance. In other words, a sufficient index of the dumping factor (more than 100) reduces the occurrence of unnecessary vibrations of equipment, etc.

It should be remembered: making quality amplifiers - time-consuming and high-tech process, respectively, too low price with decent characteristics should alert you.

Classification

To understand all the variety of market proposals, it is necessary to distinguish the product on various criteria. Amplifiers can classify:

• By power. Preliminary - a peculiar intermediate between the sound source and the final power amplifier. Power amplifier, in turn, is responsible for the strength and volume of the output signal. Together they form a complete amplifier.

Important: Primary conversion and signal processing occurs in advance amplifiers.

• On the element base, the lamp, transistor and integral mind differ. The latter arose to combine advantages and minimize the shortcomings of the first two, for example, the sound quality of the lamp amplifiers and the compactness of transistor.
• By mode of operation, amplifiers are divided into classes. Basic classes - A, B, AV. If class A amplifiers use a lot of energy, but give high-quality sound, class B accuracy to the opposite, the AB class seems to be an optimal choice, representing a compromise signal quality ratio and a sufficiently high efficiency. Also distinguish classes C, D, H and G, which occurred using digital technology. Also distinguish between the one-step and two-stroke modes of the output cascade.
• By the number of channels, amplifiers may be single, two- and multichannels. The latter are actively used in home theaters for the formation of the volume and realism of the sound. Most often there are two-channel, respectively for the right and left audio system.

Attention: The study of technical components of the purchase, of course, is necessary, but often the decisive factor is the elementary listening of equipment on the principle sounds no sound.

Application

The choice of amplifier is more justified by the goals for which it is purchased. We list the main areas of using sound frequency amplifiers:

1. As part of home audio complex. It's obvious that the best choice It is a lamp dual-channel one-bit in class A, also the optimal selection can be a three-channel class AB, where one channel is defined for a subwoofer, with Hi-Fi function.
2. For acoustic system in the car. The most popular four-channel AV or D class amplifiers, in accordance with the financial capabilities of the buyer. In cars, the crossover feature is also in demand for smooth frequency adjustment, which allows you to cut frequencies in a high or low range as needed.
3. In concert equipment. The quality and capabilities of professional equipment, higher requirements are reasonable for the largest distribution space. sound signals, as well as high need for intensity and duration of use. Thus, it is recommended to purchase an amplifier class not lower than D, capable of working at almost the limit of its capacity (70-80% of the claimed), preferably in the housing from high-tech materials protecting against negative weather conditions and mechanical impacts.
4. In the studio equipment. All of the above is valid for the studio equipment. You can add about the largest range of frequency playback - from 10 Hz to 100 kHz in comparison with such from 20 Hz to 20 kHz in the household amplifier. It is also noteworthy the possibility of separate volume control on different channels.

In the way that for a long time Enjoy clean I. qualitative soundIt is advisable to study all the variety of proposals in advance and choose an audio equipment option that meets your requests as possible.

The TDA7265 microsite - is a sufficiently powerful two-channel Hi-Fi AV amplifier in the Multiwatt typical case, the microcircuit found its niche in high-quality stereo technique, Hi-Fi Class. Simple inclusion schemes and excellent parameters made TDA7265 perfectly balanced and excellent solution when building radio amateur high-quality audio equipment.

Directory on TDA7265 (Datasheet)

Features of microsite use:

Wide supply voltage range (up to ± 25 V)
Two-polar nutrition
Sufficiently large output power 2x25 W
There are no noise when you turn off and inclusion
There is no sound mode (MUTE)
Standby mode (STAND-BY) is present
Small current consumption in STAND-BY mode
Protection against KZ (Short Circuit Guard) and overheating (THERMAL GUARD)

The limit parameters of microspectors and basic technical specifications are presented in the reference to the link above. Codovka conclusions TDA7265 There is also a little higher in the picture.

UNUC on TDA7265

Uncle Circuit:

The location of the radio components on the printed circuit board assessing the photo below:

The drawing of the printed circuit board, made in the Sprint-Layout amateur utility, has been added to the datashet folder on the microsite and all this archive you can pick up the link above.

Assembly option with an alternative line-based company

Assemble from those components that were at the right time in the right place. The capacitors put more made in the USSR, falling out of the old ones. 30 years worked and will continue to work, but just in case he checked them. The power supply provides the power supply TDA7265, and also forms two-polar stresses +/- 15V for power operating amplifiers (ordinary repeaters). Dimensions of the board are impressive, because She was going under strictly defined seats. Also added a scheme of the self-induccus pulse (at the time of disabling the winding of the transformer from the network, the self-induction pulse arises, the arc discharge is generated between the contacts of the switch, and noise is generated to the network. The circuit is lower, the fee in the photo above).

PCB in the same archive as above.

it turned out some Falstart: I sent Igor photo with a question "Is it worth writing from this or not interesting?", and
But it also turned out to be good - there are questions for which you can answer.

The fact that this power amplifier is obviously at least on wires - food, input, output.
Schemerychnically, the tough on TDA7265 is discussed in general and nothing - everything is trite.
And constructively some arrows are:
self-supporting design without chassis and
Cooling due to the natural thrust from the temperature difference in the long pipe (no fans, both in the fireplace).

Let's see what inside!

Actually the TDA7265 2x25W amplifier, bought, as already sprinkled semi-finished product and is installed on a 600 cm2 radiator to which everything else is attached. Capacitors for nutrition 47000 μF. Rectifying bridges with shunt ceramic condestatives of 0.1 μF are sold straight to the condensers of the power filler capacitors. White brackets, fastening radiator, bent from sheet polystyrene and glued to the transformer. The rest is visible and so.
Ring-trim - Demonstrator of technologies, it is possible to put it on it at all and tighten the legs, etc.

The amplifier is connected to the S-30B speakers, for which everything was stood - it was a pity it was easy to throw them, and now they will work.

The housing (as already guessed) - segment of the sewer pipe left after repair, with a diameter of 110 mm and a length of 1 foot (took a round number at least in some system of measures). View to pasting:

Originally thought to go to the self-tech "under the tree", but then I realized that "under the skin" is still better. "Under the tree" looks too false - it is immediately seen that the Prenok is not real. With black leather and shiny lattice, IMHO was very solid.

Attracting attention a brilliant grid from the fan appeared almost before the conclusion, initially I wanted to close the top of a simple fine grid, but I did not find a suitable one. By the way, this lattice is made from some very fragile nasty - two brackets broke when hesitated, the break looks like silumin.

Case assembly (on this photo while empty and connections are not screwed):

And for contact and for the type, it would be better, of course, to use screw clamps to connect columns, but they are attached to nuts from the inside of the case, and I could not come up with how to get it and tighten them and took the clip, shown in the photo. It is easier to fix it. Although summing up the wires to it is also a separate song.

Already worked as a mystery photo of construction in the work:

Before the completion of the idea, there is not enough named with a long handwritten inscription with a long manushall, such as "Marshall" or "WeltMeister", only some non-existent firm with a shuttle-free German title, such as "SchwaRzenegger" or like that.

In the dogonka I give the network public a few more ideas for designing such a design:

"Glamor" - For example, when I bought a film, there was still under the "serpentine skin" with overflows, the screws take the golden, into the slots to glue the shelters of Schwarovski, inside the illumination with blue LEDs.

"Militari" - paint the protective or ball (for sailors) paint and covered with inscriptions screen "authorized" font:

Product 3-14-2
UM-2/25 block
When transporting through the air, the plug "b" is out

Etc, to attach a military connector with a plug on the chain, etc.
Signs of radiation danger to taste.

"Tanuki or Dr. Sigmund Freud presents" - use such an amplifier with