LM4910LQ/NOPB

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Audio amplifiers are devices used in the amplification of audio signals, either for playback or processing. The LM4910LQ/NOPB is a low power monaural Class-D audio power amplifier. This amplifier provides a cost-effective solution, with integrated features such as efficient power stages, integrated charge pumps and reliable protection circuits, so that minimal external components are required. This makes it a versatile and powerful amplifier for a variety of applications, from portable audio amplifiers to car audio systems.

Applications

The LM4910LQ/NOPB audio power amplifier is ideal for small, battery-powered applications such as portable audio amplifiers, home theatre systems and car audio systems. It can be used as a main audio amplifier or as a subwoofer amplifier. The amplifier\'s low power draw also makes it ideal for products such as wireless media players, portable radios and Bluetooth speakers. The different package options mean that it can be used in space-constrained applications such as smart watches, hand-held devices and medical equipment. The LM4910LQ/NOPB can even be used in commercial and industrial audio applications, such as intercom systems and background music systems.

Features and Benefits

The LM4910LQ/NOPB features integrated features such as efficient power stages, integrated charge pumps, and reliable protection circuits that make this amplifier powerful, versatile and cost-effective. It has a high efficiency of 92%, so it requires less power for the same output. It also offers low output offset voltage and low distortion, making it ideal for high quality audio applications. The amplifier has an input voltage range of 4.2V to 6V, allowing it to be used with a wide range of battery sizes. It also has an adjustable gain setting of 0dB to 18dB, making it easy to configure the amplifier to suit a variety of applications. To protect the LM4910LQ/NOPB from over-voltage and short-circuits, it has integrated protection circuits that shut down the amplifier in the event of those issues.

Working Principle

The LM4910LQ/NOPB audio power amplifier is a Class-D amplifier, which means that it uses pulse width modulation (PWM) to convert an input audio signal into a series of electrical pulses with varying pulse widths. This signal is then converted back to an analog audio signal by a filter and an output stage. The advantage of this type of amplifier is that it is highly efficient, requiring less power for the same output. It also has low distortion and low output offset voltage. The LM4910LQ/NOPB uses an integrated charge pump to generate the necessary supply voltages for the amplifier. This reduces the number of external components needed and helps to reduce the overall size of the amplifier.

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