LM4674SQ/NOPB Datasheet/PDFLM4674SQ/NOPB Application Field and Working Principle
The LM4674SQ/NOPB is a high-performance audio power amplifier designed for line input audio applications. With a high power output capability, low noise, and fast settling time, the LM4674SQ/NOPB is an excellent choice for high-fidelity audio systems. The LM4674SQ/NOPB is typically used as a general-purpose line driver, due to its wide gain range and excellent linearity, but can also be used as a low-noise power amplifier for many applications.
The LM4674SQ/NOPB is a single-ended, stereo audio power amplifier that is optimized for high-end audio systems. It is designed to drive 8Ω loads with up to 16W of power into each channel. The amplifier achieves a total harmonic distortion plus noise (THD + N) of 0.1% at 1 kHz and is capable of producing up to 18W of output power (into 8Ω).
The LM4674SQ/NOPB is a direct-coupled amplifier, which means the output of the amplifier is directly connected to the input, which allows for lower distortion and better linearity. The amplifier also has a wide gain range of 26dB to 59dB, adjustable with an external resistor. The amplifier features a high slew rate of 20V/µs, wide bandwidth, and low noise of 1.5uVrms at 1kHz.
The amplifier also features input protection and a 6.2V regulator output. The amplifier is protected against short circuits and contains a thermal shutdown circuitry. It is also protected against input overvoltages with a single resistor. The amplifier includes an on/off switch pin.
The LM4674SQ/NOPB provides high-quality audio power amplification with excellent power efficiency. The amplifier is easy to use and provides a wide range of gains, making it suitable for a variety of audio applications. The low noise, high slew rate, wide bandwidth, and low distortion make the LM4674SQ/NOPB an ideal choice for high-end audio systems.