Ⅰ.Introduction to TDA7377 and TDA7388

•TDA7377
TDA7377 is an integrated audio power amplifier chip produced by STMicroelectronics. TDA7377 is a new class AB sound power amplifier used in car audio. The output of the two speakers of the double-bridge type can be used for two speakers, or it can be used for the four single-ended speakers of the non-bridge type. Professional perfectly compensated output stage architecture with built-in fixed gain ensures no distortion at high power with very few external components. It makes the user's online operation with TF/SD card reader easy. Troubleshooting the connection between the vehicle radio and the TDA7377.

•TDA7388
TDA7388 is a class AB audio power amplifier dedicated for automobiles. It uses a single power supply of 14.4V, MOSFET amplified output, 41Wx4-channel HiFi power amplifier, with small distortion, low noise, strong anti-interference ability, and has AC and DC output short circuit and temperature protection, especially The performance is particularly outstanding in terms of power consumption, ultra-low power consumption, stable operation and excellent sound quality. Mainly used in car radios.

Ⅱ.TDA7377 VS TDA7388 channel configuration

•TDA7377
Stereo configuration: The TDA7377's dual channels are typically used to drive stereo speakers in car audio systems. These two channels can be connected to left and right speakers respectively.
Mono Configuration: In addition to stereo configuration, the TDA7377 can also be used in mono configuration. In this case, the two channels can be bridged together to provide greater output power for driving a single speaker.

•TDA7388
Four-channel stereo configuration: The TDA7388 is commonly used to drive stereo speakers in car audio systems. It has four independent channels that can be connected to front left, front right, rear left, and rear right speakers.
Other configurations: In addition to four-channel stereo configurations, the TDA7388 also supports other connection methods, such as using two channels bridged to provide higher output power, or connecting two channels in mono mode to drive mono speakers.

Ⅲ.TDA7377 VS TDA7388 main parameters

1.TDA7377
•Working voltage: 8~18V
•Quiet drain current: 150mA (maximum)
•Output compensation voltage: 150mV
•Ultimate power consumption: 36W
•Distortion rate: less than 0.3%
•Reflected power: 50dB
•Static loss power: 90dB
•Junction temperature: -40℃～+150℃
•Installation style:Through Hole

2.TDA7388
•Output power: 4W
•Installation style:SMD/SMT
•Power supply voltage - Max: 18V
•Power supply voltage - minimum: 8V
•Temperature:- 30℃- +85℃
•Operating power supply current: 350mA
•Working power supply voltage: 18V
•Pd-Power dissipation: 80W

Ⅳ.TDA7377 VS TDA7388 connection method

TDA7377

TDA7388

Ⅴ.TDA7377 VS TDA7388 Application Scope

1.TDA7377
Car audio system: TDA7377 is commonly used in car audio systems, including car radios, CD players, MP3 players, etc. It can be used to drive front left and front right speakers to provide a stereo audio experience in the car.
Home Audio Systems: Although the TDA7377 is typically used in automotive applications, it can also be used in home audio systems, especially small audio systems or multimedia speakers.
TV sound: It can be used in TV sound systems to provide enhanced audio output to the TV and improve the viewing experience. Portable speakers: The TDA7377's small package and moderate power output make it a good choice for portable audio systems, such as portable Bluetooth speakers, TV sound bars, etc.
Other consumer electronics products: TDA7377 can also be used in other consumer electronics products, such as computer speakers, electronic game consoles, etc., to enhance their audio output performance.

2.TDA7388
Car audio system: TDA7388 is very common in car audio systems. It can be used to drive front left channel, front right channel, rear left channel and rear right channel speakers to achieve multi-channel stereo audio effect. This includes car radios, CD players, Bluetooth speakers and in-car entertainment systems.
Portable speakers: Although the TDA7388 has a higher power output, it can also be used in some portable speakers to provide more powerful audio effects.
Electronic game consoles: TDA7388 can be used in electronic game consoles and game consoles. Electronic toy players can use TDA7388 to enhance the game sound effects of electronic toy players.
Professional audio equipment: In some cases, TDA7388 may also be used in some professional audio equipment, such as audio mixers, multimedia workstations, etc., to provide multi-channel audio amplification.

Ⅵ.Can TDA7377 replace TDA7388?

Although TDA7377 and TDA7388 are both audio power amplifier chips produced by STMicroelectronics, they have obvious differences in channel configuration, output power and application range.

1. Channel configuration: TDA7377 is a dual-channel audio power amplifier chip, while TDA7388 is a four-channel audio power amplifier chip. If your application requires four channels (such as front left, front right, rear left, and rear right), the TDA7377 cannot be a direct replacement for the TDA7388 because the TDA7377 only has two channels .
2. Output power: The output power of TDA7388 is generally 40-45 watts, while the output power of TDA7377 is generally 20-30 watts. The TDA7377 may not be sufficient in applications requiring higher volume output.
3. Application requirements: Consider specific application requirements. If the application requires multi-channel audio amplification and higher output power, the TDA7388 may be more suitable. But if you only need two-channel audio amplification and want to reduce power consumption in some cases, the TDA7377 may be enough.

Ⅶ.TDA7377 VS TDA7388 circuit diagram

TDA7377

TDA7388

Frequently Asked Questions

1.What are the alternative models of TDA7377?
Models similar to TDA7377 in channel configuration, power output and application range: TDA7375, TDA2030, TDA7379, LM386, TDA1554

2.What are the alternative models of TDA7388?
Models similar to TDA7388 in terms of channel configuration and application range: TDA7384, TDA7385, TDA7375, TDA7389, TDA8563AQ

3.What is the input voltage of TDA7388?
The operating voltage of TDA7388 amplifier IC is 18V. For this type of amplifier IC, it is recommended to use SMPS power supply. 18VDC SMPS power supply rated at 5A.