Texas Instruments

LM4873MTX

LM4873MTX Description

The LM4873MTX is a high-performance, Class AB audio amplifier from Texas Instruments, part of the renowned Boomer® series. This IC is designed to deliver robust audio performance in a compact, surface-mount package, making it ideal for a wide range of consumer and professional audio applications. The LM4873MTX features a maximum output power of 3W per channel into a 3Ω load and 440mW per channel into an 8Ω load, ensuring high-fidelity sound reproduction even under varying load conditions. Its supply voltage range of 2V to 5.5V provides flexibility in power supply design, making it suitable for battery-powered devices as well as systems with a fixed power supply.

LM4873MTX Features

The LM4873MTX offers several advanced features that enhance its performance and reliability. Key features include:

• Depop Feature: Reduces the popping and clicking sounds often heard during power-up and power-down cycles, ensuring a smooth and pleasant audio experience.
• Input Multiplexer: Allows the selection of multiple input signals, providing flexibility in system design and the ability to switch between different audio sources seamlessly.
• Shutdown Functionality: Enables power savings by turning off the amplifier when not in use, which is crucial for battery-operated devices to extend battery life.
• Thermal Protection: Protects the device from overheating, ensuring long-term reliability and preventing damage due to excessive power dissipation.
• Surface Mount Technology (SMT): The LM4873MTX is available in a 20-TSSOP package, making it suitable for automated assembly processes and compact designs.
• Compliance and Safety: The device is REACH unaffected and RoHS3 compliant, ensuring it meets the stringent environmental and safety standards required by modern electronics manufacturing.

LM4873MTX Applications

The LM4873MTX is well-suited for a variety of applications where high-quality audio output is required in a compact form factor. Ideal use cases include:

• Portable Audio Devices: The low power consumption and compact size make it perfect for portable media players, tablets, and other battery-operated audio devices.
• Home Audio Systems: The high output power and ability to drive low-impedance loads make it suitable for compact speaker systems and soundbars.
• Automotive Audio: The robust design and thermal protection ensure reliable performance in the demanding environment of automotive audio systems.
• Professional Audio Equipment: The versatile input multiplexer and high-fidelity output make it a valuable component in professional audio mixers and amplifiers.

Conclusion of LM4873MTX

The LM4873MTX from Texas Instruments is a versatile and high-performance Class AB audio amplifier that offers a compelling combination of power, flexibility, and reliability. Its unique features, such as the depop function, input multiplexer, and shutdown capability, provide significant advantages over similar models, making it an excellent choice for a wide range of audio applications. Despite its obsolete status, the LM4873MTX remains a reliable and effective solution for designers seeking a compact, high-quality audio amplifier.