LM4674SQX/NOPB

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The LM4674SQX/NOPB is a high-performance audio power amplifier and is an ideal choice for applications where a powerful, low-distortion system is desired. The device is a mono-core dual-channel device, capable of delivering up to 15W audio output power into 8 ohms loads from 18V to 39V power supplies. It is designed to offer excellent signal-to-noise performance, low-noise signal conditioning, and provides the flexibility to configure a system for the application demands.

The LM4674SQX/NOPB is an ideal solution for audio power amplification applications such as home theater, audio production systems, and multi-room audio applications. It can also be used in automotive audio systems or medical equipment to provide safe, low-distortion, low-noise audio power amplification. The LM4674SQX/NOPB can also be configured as a low-power amplifier in portable audio applications, such as cell phones, MP3 players and portable media players.

The primary components of the LM4674SQX/NOPB are four main blocks - the input signal conditioning circuit, the pre-amp stage, the driver stage, and the power output stage. The input signal conditioning circuit filters out non-musical components from the signal, such as noise and distortion. The pre-amp stage amplifies the signal and adjusts its levels for the driver stage. The driver stage further amplifies the signal and increases its voltage level to the level appropriate for the power output stage. Finally, the power output stage amplifies the signal to the amplifier\'s maximum power level.

The LM4674SQX/NOPB is designed to operate in two different modes - Class AB and Class G. Class AB operation uses two or more output transistors as the output stage. In this configuration, the transistors are biased so that they operate in push-pull mode and the output stage is driven at either a constant combined current or amplitude. This design offers a good balance between power output, distortion performance, and efficiency.

Class G operation, on the other hand, uses a single push-pull output stage. With this design, the output voltage can be boosted to a higher level when maximum power output is needed. This design offers increased efficiency, while still providing excellent distortion performance. Additionally, Class G can also provide peak current limiting during large transients, reducing distortion.

The LM4674SQX/NOPB also features adjustable gain, adjustable soft-start, and adjustable power-on delay functions. The adjustable gain control allows for adjustability of the amplifier\'s power output and can be used to optimize system performance. The adjustable soft-start function allows the amplifier to start up safely and softens the power supply transient when powering on. The adjustable power-on delay function allows the amplifier to delay power-on until after all system components are ready.

Overall, the LM4674SQX/NOPB is an excellent choice for high-performance audio power amplifiers. It offers excellent signal-to-noise performance and low-noise signal conditioning. It is also capable of operating in two modes, allowing for increased flexibility and increased efficiency. Additionally, the device offers adjustable gain and adjustable soft-start and power-on delay functions, allowing for a system that can be optimized for whatever application its being used for.

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