Texas Instruments

LM4905LQ/NOPB  

Audio Amplifiers

LM4905LQ/NOPB Description

The LM4905LQ/NOPB is a monolithic Class AB audio power amplifier from Texas Instruments, designed to deliver high performance in a compact surface-mount package. This amplifier is part of the Boomer® series, known for its excellent audio quality and efficiency. The LM4905LQ/NOPB provides a maximum output power of 1.07W into an 8-ohm load, making it suitable for a variety of audio applications.

The LM4905LQ/NOPB operates from a supply voltage range of 2.2V to 5.5V, offering flexibility in power supply requirements. It features a shutdown mode, which significantly reduces power consumption when not in use, and thermal protection to prevent damage from overheating. The amplifier also includes depop features to minimize unwanted noise during power-up and power-down cycles.

Packaged in a surface-mount 8-lead LLP (Tape & Reel), the LM4905LQ/NOPB is designed for easy integration into modern electronic designs. It is REACH unaffected and RoHS3 compliant, ensuring it meets the latest environmental and safety standards. With a moisture sensitivity level (MSL) of 1, it is suitable for a wide range of manufacturing environments.

LM4905LQ/NOPB Features

• High Output Power: Delivers up to 1.07W into an 8-ohm load, providing robust audio output.
• Wide Supply Voltage Range: Operates from 2.2V to 5.5V, offering flexibility in power supply options.
• Efficient Class AB Design: Combines high efficiency with excellent audio performance.
• Shutdown Mode: Reduces power consumption to minimal levels when not in use.
• Thermal Protection: Prevents damage from overheating, ensuring reliable operation.
• Depop Features: Minimizes unwanted noise during power-up and power-down cycles.
• Surface-Mount Package: 8-lead LLP (Tape & Reel) for easy integration into PCB designs.
• Environmental Compliance: REACH unaffected and RoHS3 compliant.
• Low Moisture Sensitivity: MSL 1Un (limited), suitable for various manufacturing conditions.

LM4905LQ/NOPB Applications

The LM4905LQ/NOPB is ideal for a range of audio applications where high performance and compact design are essential. Some specific use cases include:

• Portable Audio Devices: Ideal for smartphones, tablets, and portable media players where space and power efficiency are critical.
• Consumer Electronics: Suitable for home audio systems, soundbars, and other consumer electronics requiring high-quality audio output.
• Automotive Audio Systems: Provides robust audio performance in automotive environments, where reliability and thermal protection are crucial.
• Professional Audio Equipment: Can be used in professional audio systems, such as mixers and amplifiers, where high output power and low distortion are required.

Conclusion of LM4905LQ/NOPB

The LM4905LQ/NOPB is a versatile and high-performance Class AB audio power amplifier from Texas Instruments. Its combination of high output power, wide supply voltage range, and advanced features such as shutdown mode and thermal protection make it a reliable choice for a variety of audio applications. The compact surface-mount package and environmental compliance further enhance its suitability for modern electronic designs. While the product is now obsolete, it remains a benchmark for audio performance and reliability in its category.

LM4905LQ/NOPB Documents

Download datasheets and manufacturer documentation for LM4905LQ/NOPB