Texas Instruments

LM4867MTX/NOPB

LM4867MTX/NOPB Description

The LM4867MTX/NOPB is a high-performance, Class AB audio amplifier from Texas Instruments, designed to deliver robust audio performance in a compact surface-mount package. This device is part of the renowned Boomer® series, known for its exceptional sound quality and reliability. The LM4867MTX/NOPB is capable of delivering a maximum output power of 3W per channel into a 3Ω load, making it suitable for applications requiring high power output. Additionally, it can provide 208mW per channel into a 16Ω load, ensuring versatility across various impedance levels. The device operates efficiently within a voltage supply range of 2V to 5.5V, accommodating a wide range of power supply requirements.

LM4867MTX/NOPB Features

The LM4867MTX/NOPB offers several advanced features that enhance its performance and usability:

• Depop Feature: This feature minimizes the popping and clicking sounds often associated with power-up and power-down cycles, ensuring a smooth and pleasant audio experience.
• Input Multiplexer: The input multiplexer allows for flexible signal routing, enabling the selection of different input sources, which is particularly useful in multi-source audio systems.
• Shutdown Functionality: The shutdown feature allows the amplifier to be placed in a low-power state, significantly reducing power consumption when not in use, which is ideal for battery-powered applications.
• Thermal Protection: Built-in thermal protection safeguards the device against overheating, ensuring reliable operation even under high load conditions.

The LM4867MTX/NOPB is packaged in a 20-TSSOP (Thin Shrink Small Outline Package) format, which is suitable for surface-mount applications. This packaging ensures a small footprint and efficient heat dissipation, making it ideal for space-constrained designs. The device is also REACH unaffected and RoHS3 compliant, adhering to stringent environmental regulations.

LM4867MTX/NOPB Applications

The LM4867MTX/NOPB is well-suited for a variety of applications where high-quality audio output and compact design are critical. Some specific use cases include:

• Portable Audio Devices: The combination of high power output and low power consumption makes the LM4867MTX/NOPB ideal for portable audio devices such as MP3 players, tablets, and smartphones.
• Home Audio Systems: The device's ability to handle different impedance loads and its high output power make it suitable for compact home audio systems, including bookshelf speakers and soundbars.
• Automotive Audio: The robustness and reliability of the LM4867MTX/NOPB make it a good fit for automotive audio applications, where it can drive speakers efficiently without compromising on sound quality.
• Commercial Audio: The LM4867MTX/NOPB can be used in commercial audio systems, such as public address systems and background music systems, where high power output and reliability are essential.

Conclusion of LM4867MTX/NOPB

The LM4867MTX/NOPB from Texas Instruments is a versatile and high-performance Class AB audio amplifier that offers a range of features and benefits tailored to meet the demands of modern audio applications. Its ability to deliver high power output while maintaining low power consumption, along with its advanced features like depop, input multiplexer, shutdown, and thermal protection, make it a standout choice in its category. Despite being marked as obsolete, the LM4867MTX/NOPB remains a reliable option for designers seeking a compact, efficient, and high-quality audio solution.