TDA2822 is a low-power integrated power amplifier, which is characterized by: low operating voltage, can still work normally when less than 8V, high integration, fewer peripheral components, and good sound quality. TDA2822 is widely used in radio, walkman, headphone amplifier and other small powerRate power amplifier circuit. The typical application circuit of TDA2822 for stereo amplifiers is shown in the figure.
Input maximum voltage VCCmax=11V; The voltage in the figure VCC typ=9v; Voltage range VCC RNG=3V--10V; Pin 7 is the positive electrode, and FIN is the large pin located on both sides of the IC, connected to the negative electrode (single power supply). Please refer to this diagram for the list of components, which are marked on the diagram. The unit of resistance is OhMs, and the unit of capacitance is UF. The audio access in the figure above is pin 5 and pin 8, and the ground wire is connected to the ground itself.
is using TDA2030 integrated block assembly, this is a very good power amplifier fast, as long as according to the requirements of the circuit diagram welding is absolutely successful, the power is not small, the sound quality is really good, driving the 6-inch subwoofer sound is very shocking, especially as a computer desktop audio is ideal. Secondly, you can also use MP mobile phone audio output as a sound source. In addition, you can exercise yourself and improve your hobbies and interests.
The input audio analog signal is modulated by the PWM circuit to form a pulse chain with a certain proportion of the duty cycle with the input signal. After amplification by the switching circuit, the high-frequency component is filtered by the low-pass filter to restore the amplified outputIncoming signal waveform, played by the speaker. The following diagram shows a typical circuit of a Class D amplifier, using a field effect tube H-bridge connection.
Many power amplifier protection is done with UPC1237, you check whether there is this IC. If so, the circuit is more general. If not, the circuit of the relay varies from designer to designer. The circuit using UPC1237 is as follows, downloaded from the Internet, but very common. It can be checked in this way: First detect whether the relay is bad: measure whether the relay coil is open or short circuit.
The supply voltage of the circuit is DC VsBut the rated power in different speaker impedance, there are different sizes of output power, speaker impedance is large, power amplifier power is small; Loudspeaker impedance is small, power amplifier power is large.
2, two 4Ω speakers (a bass horn, a tweeter) can not be directly parallel, so that the total impedance is 2 ohms, after receiving the amplifier, the amplifier may be damaged due to overload. The two speakers should be connected through a frequency divider, which is responsible for separating the audio current of different frequency bands and feeding it to different speakers, so that the overall impedance is still 4Ω, and the sound quality will be better.
3, w horn, 4 ohmsSuitable with how much power amplifier: suitable with 60w to 600w output power amplifier with 4 ohms terminal. If you want to get high fidelity, it is best to choose 10 times the power storage of the audio machine ~60w speaker choose 600w power amplifier. Note: The speaker and sound connection are impedance matching.
4, 4 and 8 euro speakers in the speaker can not be used together. When used together, the power distribution is unbalanced and the resistance value is small. According to Ohm's law: I = V/R, when connected together, the voltage applied is the same. Then, assuming the voltage is 1,4 and 8 ohms, that is, 1/4 = 0.25A currentAnd 1/8 = 0.125A. Obviously, the current on a 4-ohm speaker is twice that of an 8-ohm speaker.
5, Yes, and definitely. Because a doubling of the impedance is going to double the current of the amplifier at the same output voltage. The power tube may be damaged by overheating (reactive tube overcurrent protection). Obviously, this is not the normal way to play audio. Impedance matching is the basic principle of playing audio.
6, if you do not consider the power amplifier, do not consider the sound effect, you can. That means it can burn, and the sound is bad. Performance in the treble does not go up, the bass does not come down, the middle voice is not bright. theoryThe resistance value of the power amplifier and the speaker should be the same, and the power of the power amplifier should be more than 165 times the power of the speaker.
1, TDA7850 and TDA7851L are generally interchangeable. These two chips are used more in car amplifiers. TDA7850 is an old chip, and the market is now basically replaced by TDA7851L. The 7851 and 7850 chips are both very good chips, the difference is 785Compared to the 7851, the 0 sound is more balanced in terms of high notes, and the 7850 is a bit more bass, and the sound is neutral. Other facts about the TDA7850 chip.
2, much better than 7388, ta8225 power amplifier chip sound quality I have personally experienced, both power and sound quality is 7851 better. The 7388 is a new Class AB audio power amplifier designed for high-end automotive radio applications. With fully complementary PNP/NPN output configurationsEnables the TDA7388 rail-to-rail output voltage to fluctuate without the need for bootstrap capacitors. The extremely reduced number of components allows for very compact collections.
3, TDA7850 and TDA7851L are generally interchangeable. These two chips are used more in car amplifiers. TDA7850 is an old chip, and the market is now basically replaced by TDA7851L. The 7851 and 7850 chips are both very good chips, the difference is that the 7850 sound is more balanced in terms of treble than the 7851, and the 7850 is a bit more bass soundSpecific effect neutral. Model ta8225 Power amplifier chip Sound quality : The first letter is the abbreviation of the chip manufacturer or a certain chip family.
At present, there are mainly the following kinds of power amplifier chips with good sound quality: onsemi's SAA755: This chip is a very excellent audio power amplifier with excellent sound quality and efficient performance. It is widely used in various audio equipment, includingHome theater and Bluetooth speakers. The SAA755 features low distortion and wide band to provide clear, full sound quality.
The low power amplifier chip with the best sound quality is TPA3116D2. TPA3116D2 is an efficient, high-fidelity, low-power amplifier chip suitable for a variety of audio systems. It has excellent sound quality performance, low distortion and high signal-to-noise ratio to provide a clear, delicate audio experience.
Recommend you to use LM4562, its wide operating voltage range, high precision, sound quality is very good. LM4562 is National Semiconductor CorporationHigh quality tantalum capacitor. All resistors use metal film and have good thermal stability.
LM1875 LM1875 is one of the most commonly used power amplifier chips, designed for mono, not only has the advantages of mellow sound quality and large power, but also has a complete protection circuit, in the same type of chip belongs to the high-grade model.
1, the sound quality of TA2022 amplifier is very good. TA2022The digital power amplifier uses advanced digital audio processing technology ta8225 power amplifier chip sound quality , with lower distortion and noise levels ta8225 power amplifier chip sound quality , can provide clearer and transparent sound quality. It has excellent analytical power and can accurately restore the details and dynamic range of the audio signal, so that the listener can better feel the nuance and emotional expression of the music.
2, in fact, the two effects are similar, the digital amplifier is small, the efficiency ratio is high, energy saving and emission reduction, pay attention to the speakerCollocation is a very good choice.
3, LM3886 good, online finished board 118 yuan, power and sound quality do not have to say. How to improve the sound quality of power amplifier ta8225 power amplifier chip sound quality : All coupling capacitors use high-quality tantalum capacitors. All resistors use metal film and have good thermal stability. The power filter circuit uses large capacity electrolytic capacitor, large inductive inductance, etc., to discharge the interference clutter of the power supply. Select high quality power amplifier block, frequency divider and other components.
4, TDA1521 (12W*2) ta8225 power amplifier chip sound quality ; TDA2030A (22W) ta8225 power amplifier chip sound quality ; LM1875 (25W); TDA1514A (30W); SK3875 (35W); LM3886 (56W); TDA7293 (60W); The LM12CLK (80W) and above are dual power supplies. TDA2009A (12W*2); TDA1520 (20W); TDA7580 (50W*4) These are single-chargepn=4&rn=1&di=116682928&ln=80 This is the link of the circuit diagram, follow a sure to work.