Texas Instruments

LM4991MA/NOPB  

Audio Amplifiers

LM4991MA/NOPB Description

The LM4991MA/NOPB is a high-performance, monolithic Class AB audio power amplifier from Texas Instruments, designed to deliver exceptional audio quality and efficiency. This amplifier is part of the renowned Boomer® series, known for its robust performance and reliability in various audio applications. The LM4991MA/NOPB is capable of delivering a maximum output power of 1.5W per channel into an 8-ohm load, making it suitable for applications requiring high-fidelity audio output.

Key technical specifications include a wide supply voltage range of 2.2V to 5.5V, ensuring compatibility with a variety of power sources. The amplifier is housed in a surface-mount package, specifically an 8SOIC, which is ideal for compact and space-constrained designs. The LM4991MA/NOPB also features depopulation protection, shutdown functionality, and thermal protection, enhancing its reliability and longevity under various operating conditions.

LM4991MA/NOPB Features

The LM4991MA/NOPB offers several unique features that set it apart from similar models in the market:

• Depopulation Protection: Reduces the risk of audible noise during power-up and power-down cycles, ensuring a smooth and silent operation.
• Shutdown Functionality: Allows the amplifier to be placed in a low-power state, significantly reducing power consumption when not in use.
• Thermal Protection: Automatically shuts down the amplifier if the temperature exceeds safe operating limits, protecting the device from potential damage.
• Wide Supply Voltage Range: Operates efficiently within a 2.2V to 5.5V supply voltage range, providing flexibility in power source selection.
• Surface-Mount Package: The 8SOIC package is ideal for surface-mount technology (SMT) applications, enabling compact and high-density designs.

LM4991MA/NOPB Applications

The LM4991MA/NOPB is well-suited for a variety of applications where high-fidelity audio output and efficient power management are critical. Some specific use cases include:

• Consumer Electronics: Ideal for portable audio devices, such as smartphones, tablets, and portable media players, where space and power efficiency are paramount.
• Automotive Audio Systems: Suitable for in-car entertainment systems, providing high-quality audio output with minimal power consumption.
• Home Audio Equipment: Can be used in compact speaker systems and soundbars, delivering clear and powerful audio performance.
• Professional Audio: Applicable in professional audio equipment where reliability and high-fidelity audio are essential.

Conclusion of LM4991MA/NOPB

The LM4991MA/NOPB from Texas Instruments is a versatile and high-performance Class AB audio power amplifier that offers significant advantages over similar models. Its wide supply voltage range, surface-mount package, and advanced features such as depopulation protection, shutdown functionality, and thermal protection make it an ideal choice for a wide range of audio applications. Whether used in consumer electronics, automotive systems, or professional audio equipment, the LM4991MA/NOPB delivers exceptional audio quality and reliability, making it a standout product in the market.

LM4991MA/NOPB Documents

Download datasheets and manufacturer documentation for LM4991MA/NOPB

Datasheets :

LM4991      

HTML Datasheet :

LM4991      

PCN Design/Specification :

Mold Compound 24/Mar/2016       SOIC Pkg Wire Bonding 20/Mar/2013