MAX9742ETX+T

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Audio amplifiers are essential in many applications, from large public venues to domestic console products. A range of devices are available which are designed to improve and enhance audio performance through linear amplification. The MAX9742ETX+T is a globally certified dual-channel audio power amplifier with a range of features and performance characteristics which makes it an ideal choice for many applications. This article will discuss the application field and working principle for the MAX9742ETX+T.

Application Field for the MAX9742ETX+T

The MAX9742ETX+T is a dual-channel amplifier with a low thermal resistance, low power dissipation and high output power. It is optimized for applications requiring low power consumption, with the ability to maintain a maximum efficiency of 42.5%. This makes the device particularly suitable for portable products such as cell phones, notebook computers, portable media players and other products requiring high output power at low power consumption.

The device also has an integrated I2C/SPI compatible interface, so that audio performance characteristics can be controlled in individual channels and product models with different sound profiles can be created via configuration. This makes it suitable for consumer audio applications, such as active loudspeakers, speaker hubs and sound bars.

Working Principle of the MAX9742ETX+T

The MAX9742ETX+T is a high-efficiency, Class D power amplifier with a maximum efficiency of 42.5%. The device features an efficiency boost control pin, so that the efficiency can be maximized in low power applications. The device includes protection circuitry, which is designed to protect against chip overvoltage, overcurrent, undervoltage, over-temperature and ground misconnection.

The device features a variable gain control input, allowing for the adjustment of the device’s gain setting. The gain control voltage range is between 0V and 5V, allowing for individual channel control. The device\'s output is capable of driving up to 10W into a 4 Ohm load, making it suitable for low-impedance speaker applications. The device is also able to drive high-impedance loads, allowing for the use of different loads with different speaker applications.

The device also includes an adjustable low-pass filter which can be used to reduce high frequency distortion. This makes it suitable for applications where fidelity and signal integrity are important, such as home audio products. Additionally, the device includes a programmable volume control, allowing for the adjustment of the device’s volume without having to adjust the device’s gain setting.

Conclusion

The MAX9742ETX+T is a dual-channel audio power amplifier capable of providing high output power at low power consumption. It is optimized for low power applications and includes protection circuitry, a variable gain control, an adjustable low-pass filter, and a programmable volume control. This makes it ideal for audio applications such as active loudspeakers, speaker hubs and sound bars.

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