1. LM1875 is a mono amplifier IC, LM1876 is a dual-channel amplifier IC, LM1876 is equivalent to two LM1875s; From the point of view of the parameters are almost the same, so there is little difference in essence. Generally, LM1876 will be considered when the structure is compact, if not for the fact that it is still two good heat dissipation and convenient to buy.
2, the sound quality is similar, the rated power is about 20 watts, the former is more commonly used. Try to import key chips,Circuit design and power supply.
3, LM1875 is a high-fidelity audio power amplifier, its output power is 20W, the use of a single power supply, the power supply voltage between 12V and 60V, suitable for low-power audio amplifier design, and because it is mono, so you can put two LM1875 in parallel together to achieve dual-channel power amplifier. The sound quality of LM1875 is delicate and warm, suitable for high-fidelity music broadcasting, HIFI audio and other occasions.
1, TDA1521 performance and sound quality is better than LM1876, can have a better music experience.
2, TDA1521 and LM1875 I have done. The sound quality is comparable. However, the calorific value of 1521 is much less than that of 187 which makes it much, much less troublesome to make. And the typical voltage of 1521 is double 16V (that is, alternating current double 12V or so), the typical voltage of 1875 is double 25V (AC double 18V or so), so if the output power of 12W can meet the needs, II think 1521 is better.
3, look at me: TDA1521/TDA1514A TDA1521/TDA1514A is the Netherlands Philips company specially designed for digital audio in the playback of low distortion and high stability and launched two chips. Therefore, the sound quality used to connect the direct output of the CD player is particularly good. The parameters are: When the voltage of TDA1521 is ±16V and the impedance is 8Ω, the output power is 2×15W, and the distortion is only 0.5%.
4, TDA5121A output is 2*6W, while TDA1521 output is 2*12W, so TDA1521 output power is larger, as for which is good, it depends on your purpose is how much power, want to do more power, choose the right chip, I made a TDA1521, feel good, I suggest you look at the relevant books and browse the forum, add knowledge.
5, the general integrated circuit amplifier can be, the circuit is simple, the failure rate is low, the protection is complete. Recommend you some excellent power amplifier integrated circuits (the front is the model, the back is the actual power) : TDA1521 16W, LM1875 25W,Rate of audio amplifier design. Compared with the LM1875, the LM4766 has a wider power supply voltage range, greater power, and stronger output capacity, but its sound quality is also more calm and clean, suitable for use in situations requiring high pitch and low distortion, such as movie theaters, recording studios, and stage performances.
2, the sound quality is similar, the rated power is about 20 watts, the former is more commonly used. The key chips should be imported, circuit design and power supply as far as possible.
3, LM1875 power is smaller than the latter two, the sound is still quite charming, considering the power factor of these three LM3886 is the best. The LM4766 in the remaining production of the industry is not as good as the other two, and the pin multi-circuit is relatively difficult to cloth. Then people will think LM4766 is better, look at the numbers it is big ah.
4, LM1875 is one of the most commonly used power amplifier chips, designed for mono, not only has the advantages of mellow sound quality and high power, but also has a complete protection circuit, in the same type of chip belongs to the high-grade model.
5, I am also using the chip, its timbre is very sweet, mellow sound quality, quite a tube charm, suitable for playing more softMusic. NS company also has LM187LM187LM4766 and other familiar chips, among which LM4766 is the latest, designed for dual channel, including overvoltage, undervoltage, overload, overtemperature and other protection circuits. Its output power is not less than 240W. The bass is deep and elastic, quite daring style. 6. The power amplifier integration blocks used in the experiment include LM1875, LM3886, TDA1514 and LM4766. Due to my personal preference for the timbre of LM4766, and other IC application magazines have also been introduced. Hence the LM4766Take the BTL application as an example. Figure 1 shows the first BTL application connection for LM4766. The input signal is fed from the in-phase input of the LM4766 amplifier B, R6, R4, C2 being its negative feedback network.
lm1875. The lm1875 amplifier has better sound quality and is very strong, especially in low frequency bands. One of the most commonly used power amplifier chips, lm1875 is designed for mono, which not only has the advantages of mellow sound quality and large power, but also has complete protectionThe circuit has the effect of dual channel power amplifier board.
The sound quality is similar, the rated power is about 20 watts, the former is more commonly used. The key chips should be imported, circuit design and power supply as far as possible.
is a mono chip, 1876 is a dual-channel chip, can not be directly exchanged, 1875 is a mono chip, but the working voltage is high, the range is 16 ~ 60V. The undistorted power is 20W (THD=0.08%), when THD=1%, the power can reach 40W (the human ear has no obvious feeling of the distortion below THD10%), and the protection function is perfect. Two amplifiers, six0W transformer.
LM1875 is a mono amplifier IC, LM1876 is a dual-channel amplifier IC, LM1876 is equivalent to two LM1875s; From the point of view of the parameters are almost the same, so there is little difference in essence. Generally, LM1876 will be considered when the structure is compact, if not for the fact that it is still two good heat dissipation and convenient to buy.
But its sound quality is also more calm and clean, suitable for use in situations requiring high pitch and low distortion, such as movie theaters, recording studios, stage performances and so on. Therefore, choose LM4766 or LM1875 depends on your specific application scenario and design needs. If you need a high fidelity audio amplifier, use the LM1875; If you need a high performance, high output power audio amplifier, use the LM4766.
good, large power, sound quality is also good, with a light gall taste, the transformer needs 300W such the best.
NE5532 is a low noise op amp, after the change of sound quality will be greatly improved (mainly clarity), it is recommended to replace the coupling capacitor with tantalum capacitor, then will feel a new face.
The bandwidth and conversion rate of LM1876 are higher than those of LM1875. However, the quality of the sound is not only to see the parameters, there are too many factors that affect the sound quality, such as even the mood when you listen to the sound will affect. Different people have different opinions. I hope it can help you. If you are satisfied, please adopt it in time. Thank you.
is probably better than 5532 (just maybe), realThey're pretty much the same. After all, 5532 was once known as the king of the operational amplifier. But now buy a lot of goods are stowed, one or two yuan a piece. It is recommended to buy ceramic packaging, which is generally much stronger. Or you could just buy them. I like the power amplifier block 7294, one is that his power is almost the largest (1876 power is the smallest, but the sound quality is good.
Like your current situation, it is recommended that you assemble the integrated power amplifier is easier to get started, if the design is reasonable, the sound quality is quite good, these integrated power amplifier peripheral circuits are simple, and some finished kits, such as the classic LM1876, TDA7294 and so on. Accumulated some hands-on foundation and then turn discrete components power amplifier out of their own characteristics much faster. If you want to do it in one step, I suggest you choose the "three Ken" pair, the sound quality is very good.
Active speakers generally have small output power, generally mono output power does not exceed 50W, and the power amplifier components used are generally integrated power amplifier blocks such as: LM187LM187 or TDA729TDA7293, etc., with such an integrated block is still a relatively high-end active speaker, and the integrated block used by the low-end active speaker has a smaller power of 2030.
Design with "beautiful tone,High fidelity "for the purpose. All kinds of high and new technologies are concentrated in this kind of power amplifier. Prices also range from more than 1,000 yuan to hundreds of thousands of yuan. "HI-FI amplifier" is also divided into "split type" [the former amplifier is independent], and "combined type" [the former and the rear machine into one].