LM4871N

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Linear - Amplifiers - Audio

The LM4871N is a popular integrated amplifier designed to help drive low-power audio systems. The LM4871N operates in the audio frequency range (20 Hz to 20KHz), and provides an output current up to 25 mA. This amplifier uses common-mode noise cancellation techniques to reduce overall noise, providing a low-noise audio signal.

The LM4871N provides an amplifier solution for a wide variety of audio applications, such as LCD TVs, car audio systems, portable media players and other applications where low-power audio signals need to be amplified. The microchip is ideal for portable applications, as it requires only a low amount of power to operate (2.8 V to 5.5 V).

The LM4871N is a two-stage, class AB audio amplifier. The two-stage design ensures linear frequency response across the audio frequency range. The LM4871N is configured with differential inputs and dual outputs. This provides the extra voltage to drive low-impedance loads, while also preventing input noise from being amplified.

The LM4871N also contains a number of features to improve its performance. These include a high PSRR (power supply rejection ratio) of 70dB and a maximum gain of 25dB. The PSRR ensures that the LM4871N is capable of rejecting any power supply noise, ensuring a cleaner audio signal. The output current can be adjusted to suit the application, with a maximum current of 25mA.

The LM4871N also contains additional features to protect the sensitive audio signal. The chip offers short circuit protection, thermal shutdown and over-voltage protection. This ensures that the audio signal remains clean and distortion-free, even in the presence of electrical disturbances.

The LM4871N is an extremely versatile and reliable amplifier for low-power audio applications. Its two-stage, class AB configuration provides a linear frequency response and improved power supply rejection. The amplifier is capable of operating from a low voltage source, making it suitable for portable applications. The chip also provides a number of safety features to protect the delicate audio signal.

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