Texas Instruments

LM4871N

LM4871N Description

The LM4871N is a monolithic integrated circuit designed for high-performance audio applications, featuring a Class AB amplifier topology. This device is part of the renowned Boomer® series by Texas Instruments, known for its robustness and reliability in audio amplification. The LM4871N is capable of delivering a maximum output power of 3 watts into a 3-ohm load, making it suitable for driving small to medium-sized speakers with high efficiency.

The LM4871N operates within a wide supply voltage range of 2V to 5.5V, providing flexibility in power supply design and ensuring compatibility with various power sources. It is housed in a through-hole package, specifically an 8-pin DIP (Dual In-line Package), which is ideal for applications requiring easy installation and replacement. The device also a features shutdown mode and thermal protection, enhancing its reliability and longevity in demanding environments.

LM4871N Features

• High Output Power: Capable of delivering 3 watts into a 3-ohm load, ensuring robust audio performance.
• Wide Supply Voltage Range: Operates from 2V to 5.5V, offering flexibility in power supply design.
• Class AB Amplifier: Delivers high efficiency and low distortion, ideal for high-fidelity audio applications.
• Shutdown Mode: Reduces power consumption when not in use, enhancing energy efficiency.
• Thermal Protection: Prevents damage due to overheating, ensuring long-term reliability.
• Through-Hole Mounting: Easy to install and replace, suitable for applications requiring manual assembly.
• Compliance: REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance.
• Packaging: Supplied in a tube package, facilitating easy handling and storage.

LM4871N Applications

The LM4871N is ideal for a variety of applications where high-quality audio amplification is required. Its high output power and wide supply voltage range make it suitable for portable audio devices, consumer electronics, and small-scale audio systems. Specific use cases include:

• Portable Audio Devices: Ideal for battery-powered speakers and audio amplifiers, where efficiency and compact design are crucial.
• Consumer Electronics: Suitable for home audio systems, multimedia devices, and other applications requiring reliable audio amplification.
• Small-Scale Audio Systems: Perfect for compact speaker systems, soundbars, and other audio applications where space is limited.

Conclusion of LM4871N

The LM4871N is a versatile and reliable Class AB audio amplifier, offering high output power and a wide supply voltage range. Its shutdown mode and thermal protection features enhance its longevity and reliability, making it an excellent choice for various audio applications. Despite being marked as obsolete, the LM4871N remains a valuable component for designers and engineers looking for a robust and efficient audio amplification solution.