LM4985TM/NOPB

The LM4985TM/NOPB is a highly efficient, dual-channel audio power amplifier that is designed to produce high-resolution audio signals while providing significant power-saving benefits. This amplifier is capable of achieving up to 90% efficiency with very low distortion and noise levels, making it ideal for use in a variety of audio applications.

This power amplifier is built with a patented Type-A Interleaved Topology that allows it to deliver high current output from a low-voltage power supply. Additionally, an innovative Direct-Path Architecture eliminates output coupling capacitors and blocks, providing a direct path from the power stage to the output pin. This architecture enables low output impedance, reducing the effects of load transients and providing a more consistent and accurate sound quality.

The LM4985TM/NOPB integrates several innovative features to improve the overall sound performance and efficiency of the amplifier. It includes robust transient protection circuitry that limits input voltage peaks, reducing distortion and thumps. Internal diagnostic functions monitor temperature, output current, and thermal protection, providing reliable performance without costly external components. Additionally, the Class G/H delivers up to 50% efficiency gains compared to conventional Class AB designs.

The LM4985TM/NOPB application field and working principle can be broken down into three main areas. First, the amplifier is used to process high-fidelity (Hi-Fi) audio signals. This can include music, spoken words, and other audio recordings. The amplifier will typically be connected to a variety of inputs such as a digital-to-analog converter, microphone, or microphone preamp, to amplify and route the signal.Second, the amplifier is capable of amplifying low-level signals such as microphone-level signals. This is accomplished through its low noise and distortion characteristics, and can be further enhanced by its wide voltage range. This makes it ideal for a variety of public address (PA) applications.Finally, the amplifier may be used to power headphones. The high efficiency of this amplifier ensures that the headphones receive a clean, powerful amplification without the need for additional amplification, while the low noise and distortion characteristics provide a crystal-clear sound quality.

Overall, the LM4985TM/NOPB is an efficient and powerful audio power amplifier that is well suited for a variety of audio applications. Its patented Type-A Interleaved Topology and Direct-Path Architecture, robust transient protection features, and Class G/H operation enable it to deliver superb sound quality and unmatched efficiency. This makes it an ideal choice for Hi-Fi audio, PA systems, and headphone amplifiers.