LM4889MA/NOPB

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LM4889MA/NOPB is an integrated audio power amplifier that works according to the principle of linear amplification. It is designed to provide up to 3 watts of output power at 8Ω loads as well as 4.5 watts into 4Ω loads and allows flexible DC supply voltages of up to 6V. It is designed to be compatible with a range of portable audio devices and can provide a high output sound with minimal energy consumption.

Features

The LM4889MA/NOPB provides low distortion and high PSRR, making it ideal for portable audio applications. It features an integrated DC volume control and an integrated headroom extension circuitry for improved dynamic range. The amplifier also has a wide gain control range with externally adjustable gain.

The device has short circuit, thermal and overvoltage protection circuitry. It also has low quiescent current and high power supply rejection ratio (PSRR).

Applications

The LM4889MA/NOPB can be used in a variety of portable audio applications, including mobile phones, personal digital assistants (PDAs), portable media players, and portable sound systems. It can be used in both low and high-power audio applications.

The LM4889MA/NOPB can also be used in automotive audio applications such as car stereos, CD players, and digital amplifiers, as well as public address systems, hearing aids, and other powered audio systems.

Working Principle

The LM4889MA/NOPB uses a linear amplifier design that is able to generate high power output levels. The amplifier operates in a dual-supply configuration, with one supply connected to the positive terminal of the input signal and the other supply connected to the negative terminal.

The signal is then amplified by the gain stage of the amplifier. This is achieved by adjusting the signal current amplitude and the supply voltages. The signal is then amplified further by the output stage of the amplifier.

The LM4889MA/NOPB uses a low noise floor and low distortion to ensure excellent sound quality. The amplifier has an open loop gain of approximately 25dB, making it suitable for use in audio applications. The amplifier also has a wide gain control range, allowing it to be used in a variety of audio applications.

Conclusion

The LM4889MA/NOPB is an integrated audio power amplifier that works according to the principle of linear amplification. It is designed with a low power consumption and features an integrated DC volume control and headroom extension circuitry for improved dynamic range. The device has short circuit, thermal, and overvoltage protection circuitry and is suitable for use in a variety of portable and automotive audio applications.

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