LM4850MM/NOPB

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The LM4850MM/NOPB is an integrated audio amplifier designed for use in portable and battery-operated products. It provides the audio amplification needed to drive small speakers in portable and other small form-factor products, while still operating within the tight constraints of portable power sources. It is a basic audio power amplifier in the Linear Audio Amplifier category that is designed to operate off of a single supply voltage, providing high-output power with low distortion and noise, and is also designed to minimize static power consumption. The LM4850MM/NOPB is a highly efficient and versatile amplifier for audio applications.

Overview of the LM4850MM/NOPB Audio Power Amplifier

The LM4850MM/NOPB is a three-terminal audio power amplifier that offers high-performance audio amplification with very low static power consumption. It is designed to drive an 8-ohm speaker load with a rated output power of 0.8W, and can also be used with a 4-ohm speaker load with an output power of 1.6W. The amplifier includes an integrated thermal protection circuit that prevents damage to the device in the event of an overtemperature condition. It also incorporates short-circuit protection, and can be operated directly from a 3V single-supply voltage.

The device has an integrated ground-referenced output and is designed to work with a variety of audio sources such as MP3 players, CD/DVD players, game consoles, portable media-players, mobile phones, and PDA/pocket PCs. It can be used in a variety of applications such as portable media players, car audio systems, personal communication devices, portable PCs, and more. The LM4850MM/NOPB is housed in the 16-pin TSSOP package.

Features and Operating Principles of the LM4850MM/NOPB

The LM4850MM/NOPB audio amplifier provides a wide range of features and performance advantages. It is designed to provide superior sound quality, low noise, low distortion, high efficiency, and low static power consumption. It is equipped with a power management controller (PMC) that ensures the device is always within a safe operating range and helps to minimize power consumption while maintaining maximum audio performance. The amplifier features an integrated shutdown/ mute/ standby feature, which allows the protection circuitry to be shut off in order to conserve power. The PMC is also used for very low power consumption during standby modes, allowing the LM4850MM/NOPB to be used in battery-operated products without compromising battery life.

The LM4850MM/NOPB is designed with an open-loop gain of around 20dB, and an open-loop bandwidth of 4MHz. The input impedance is 2K ohms with a gain control range of 6dB to 18dB. The supply voltage range is 2.7V-6V and the audio output power sensitivity is 0.45V. It has a wide dynamic range with a total harmonic distortion of less than 0.2% and a signal-to-noise ratio of 90dB. In order to ensure optimal sound performance, the amplifier employs an active-balanced output and an adjustable low-pass filter at its output.

Applications of the LM4850MM/NOPB Audio Amplifier

The LM4850MM/NOPB amplifier is designed for a variety of audio applications, including portable audio, automotive audio, home audio, and multimedia systems. It can be used for amplifying the audio signal from any audio source and is suitable for low-power audio applications, including portable audio players, car audio systems, home audio systems, and multimedia systems. The wide dynamic range and low distortion of the LM4850MM/NOPB make it ideal for audio applications where sound quality is a priority. The amplifier is also capable of driving two speakers in parallel for stereo applications.

In addition to its audio applications, the LM4850MM/NOPB can also be used for low-power RF and power transistors, such as those found in automotive remote keyless systems, digital radios, and medical imaging systems. The high efficiency and low static power consumption of the amplifier make it an ideal choice for low-power applications. The LM4850MM/NOPB utilizes advanced PMC circuitry that helps to minimize power consumption while still maintaining audio performance. Additionally, the amplifier can be used for noise-canceling systems, active noise reduction systems, and low-noise drive amplifier applications.

Conclusion

The LM4850MM/NOPB is an integrated audio power amplifier that provides a wide range of features and performance advantages. It is designed to offer superior sound quality and low distortion, and is ideal for a variety of audio applications, including portable audio, automotive audio, home audio, and multimedia systems. The LM4850MM/NOPB is also suitable for low-power RF and power transistor applications and can be used for noise-canceling systems, active noise reduction systems, and low-noise drive amplifier applications. The advanced PMC circuitry incorporated within the device helps to minimize static power consumption, making it an ideal choice for battery-operated applications.

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