SK387LM18752 Frequency response 10Hz to 100KHz, BTL connection output power is larger.
onsemi's SAA755: This chip is a very good audio power amplifier with excellent sound quality and efficient performance. It is widely used in a variety of audio equipment, including home theater andBluetooth speakers, etc. 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.
ESS Sabre is one of the most popular power amplifier chips on the market today. It uses 32-bit ultra-low distortion digital-to-analog converter technology, with/-36V Maximum AC input voltage double 21V, and now the LM18752 power tube power 60W maximum DC voltage /-56V maximum AC input voltage double 22V.
Hello! After looking at the chip on your drawing, it should be TDA2030A chip, which is replaced by LM1875, TDA2050, SK18752 and SK3875.
Pin positive phase audio signal input, 2 pin negative feedback signal input, 3 pin negative power supply, 4 pin power output connected to the load horn, 5 pin positive power supply, which can be replaced by sk3875, LM1875, etc. The peripheral components are the same.
1, the output power is up to 30 watts, A VO is usually 90 dB. Low distortion: 0.015%, 1 kHz, 20 W. Wide power bandwidth: 70 kHz, with AC and DC short circuit ground protection, thermal protection with parole circuit. High current capability 4A,Wide power supply range 16V-60V, internal output protection diode, 94 dB ripple suppression.
2, you can use TDA2030A or TDA2040 to directly replace, can not use TDA2003 to replace, because the working voltage is different, the working voltage of TDA2030 is higher than TDA2003. The LM1875 can directly replace the TDA2030, and the performance is much better than the TDA2030. Both TDA2030A and TDA2040 have better performance than TDA2030.
3, replaceable model: 2SA1553. workRate - Max: 150W Frequency - Conversion: 30MHz. Installation type: Through hole package/Shell: 2-21F1A. Packing: Pipe fittings. Pin number: 32SA1943. Low frequency or audio amplification (LF), HIFI, output pole.
4, the working voltage of C5200 is 230V, the working current is 15A, and the power consumption is 150W; 2SK1530 operating voltage, 200V operating current, 12A, power consumption 150W, the two parameters are close, seemingly can be replaced, but C5200 is N-type silicon transistor, and 2SK1530 is a field effect tube, the type of the two is different, the drive circuit is different, so it can not be replaced.
5, if the four 1875s are close and in a row, you can find a large radiator, the installation of the use of mica sheet or silicone gasket insulation, and the radiator must not be associated with the rest of the circuit, because the 1875 metal sheet is connected to -VCC.
At present, there are mainly the following kinds of power amplifier chips with good sound quality: On Beauty (onsemi's SAA755: This chip is a very good audio power amplifier with excellent sound quality and efficient performance. It is widely used in a variety of audio equipment, including home theater and Bluetooth speakers. The SAA755 features low distortion and wide band to provide clear, full sound quality.
ESS Sabre is one of the most popular power amplifier chips on the market today. It uses 32-bit ultra-low distortion digital-to-analog converter technology, has an extremely high signal-to-noise ratio and dynamic range, and is able to output high-quality audio signals. ESS Sabre workChips are widely used in high-end audio and home theater brands such as Pioneer, Onkyo and Marantz.
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. This power amplifier chip uses Class D amplification technology, which has the characteristics of high efficiency and high energy efficiency ratio, and can effectively reduce power consumption and heat loss, thereby extending the service life of the sound system.