MAX9770ETI+T

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Audio amplifiers are one of the major components in any audio device. The MAX9770ETI+T is a highly efficient digital Class D audio amplifier that improves audio system performance and significantly reduces current consumption. The MAX9770ETI+T is designed for applications such as portable audio, docking stations, and pre-stylized home audio amplifiers. This amplifier is highly efficient, allowing it to operate with lower supply voltage while still providing superior sound quality. It also provides external gain control and a 1.2V pop protection circuit. In this article, we will discuss the application fields and the working principle of the MAX9770ETI+T.

Application Field

The MAX9770ETI+T is suitable for use in a wide range of audio applications. Its high efficiency makes it ideal for devices where power consumption is an important consideration, such as portable audio devices. The amplifier also has a wide gain range, from 0dB to 29dB, which allows it to be used in many different types of audio systems. It is capable of driving up to 3W into a 4Ω load, making it well suited for use in small audio systems. The amplifier also features a short circuit protection circuit, allowing it to safely drive low impedance loads.

Working Principle

The MAX9770ETI+T uses Pulse Width Modulation (PWM) technology to amplify an audio signal into an amplified output. It uses an integrated PWM modulator, generated from a clock generator, to generate a high-frequency pulse width modulated signal that is fed to the output stage of the amplifier. The output stage consists of a pair of high-efficiency switching transistors which convert the PWM signal into an amplified output. The transistors are driven by an integrated gate driver, which controls the on-off switching of the transistors, allowing them to amplify an audio signal as it passes through the amplifier.

The MAX9770ETI+T also uses a patented thermal shutdown system which ensures operation within safe limits. If the temperature of the amplifier exceeds a predetermined threshold, the amplifier is automatically disabled to protect itself from damage. Additionally, the amplifier is designed to regulate the output voltage at different supply voltages, allowing it to remain stable over a wide range of supply voltages.

Conclusion

The MAX9770ETI+T is a highly efficient digital Class D audio amplifier that improves audio system performance while reducing power consumption. It is ideally suited for applications such as portable audio, docking stations, and pre-stylized home & studio audio amplifiers. It features a wide gain range and is capable of driving up to 3W into a 4Ω load, making it well suited for use in small audio systems. Additionally, the amplifier features a thermal shutdown system, allowing it to be used safely in any application. Employing PWM technology, the MAX9770ETI+T provides superior sound quality with a high degree of efficiency.

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