Texas Instruments

LM4842LQ/NOPB

LM4842LQ/NOPB Description

The LM4842LQ/NOPB is a high-performance, Class AB audio amplifier from Texas Instruments, designed for applications requiring robust audio performance and efficient power management. This amplifier is part of the Boomer® series, known for its excellent audio quality and reliability. The LM4842LQ/NOPB features a maximum output power of 2.2W per channel into a 3Ω load and 95mW per channel into a 32Ω load, making it suitable for driving various types of speakers and headphones. It operates from a supply voltage range of 2.7V to 5.5V, providing flexibility in power supply options.

LM4842LQ/NOPB Features

The LM4842LQ/NOPB offers several advanced features that enhance its performance and usability:

• Depop, Mute, Shutdown: These features allow for precise control over the amplifier's operation, minimizing unwanted noise during power-up and power-down sequences. The mute function can be used to disable audio output, while the shutdown feature significantly reduces power consumption, making it ideal for battery-powered applications.
• Thermal Protection: This feature ensures the amplifier operates within safe temperature limits, protecting it from damage due to overheating.
• Volume Control: The LM4842LQ/NOPB includes volume control capabilities, allowing users to adjust the audio output level as needed.
• Surface Mount: The surface mount package type facilitates easy integration into compact designs, suitable for modern electronic devices.
• Package: The Tape & Reel (TR) packaging option ensures efficient handling and assembly in manufacturing processes.
• Compliance: The LM4842LQ/NOPB is REACH Unaffected and ROHS3 Compliant, meeting environmental and regulatory standards for electronic components.

LM4842LQ/NOPB Applications

The LM4842LQ/NOPB is well-suited for a variety of applications where high-quality audio output and efficient power management are critical. Its ability to deliver 2.2W per channel into a 3Ω load makes it ideal for driving small speakers in portable devices, such as smartphones, tablets, and portable media players. Additionally, its 95mW output into a 32Ω load is perfect for driving headphones, ensuring clear and powerful audio performance.

The LM4842LQ/NOPB's features, such as depop, mute, and shutdown, make it particularly useful in battery-powered devices where power consumption and noise control are essential. The thermal protection feature ensures reliable operation in various environmental conditions, making it suitable for both consumer and industrial applications.

Conclusion of LM4842LQ/NOPB

The LM4842LQ/NOPB is a versatile and high-performance Class AB audio amplifier that offers a range of features and benefits for modern electronic devices. Its ability to deliver significant output power while maintaining low power consumption and excellent audio quality makes it a standout choice in its category. Despite being marked as obsolete, the LM4842LQ/NOPB remains a reliable option for applications requiring robust audio performance and efficient power management. Its compliance with environmental and regulatory standards ensures its suitability for a wide range of applications, making it a valuable component for designers and engineers in the electronics industry.