The LM4990MHX is a high-performance audio power amplifier from Texas Instruments (formerly National Semiconductor) designed for driving stereo headphones. It delivers high-fidelity audio with low distortion, making it suitable for portable audio devices and personal entertainment systems. The amplifier is designed to operate from a single power supply, simplifying circuit design and reducing component count.

Applications

• Headphone amplifiers
• Portable audio players
• Cellular phones
• Laptop computers
• Personal entertainment systems
• Audio docks
• USB speakers

Features

• Stereo headphone amplifier
• High output power: 105mW per channel into 32Ω
• Low THD+N: 0.03% (typical)
• Single-supply operation
• Integrated short-circuit protection
• Thermal shutdown protection
• Available in a small TSSOP package

Benefits

• High-Quality Audio: Delivers clear and crisp audio for an enhanced listening experience.
• Compact Design: The TSSOP package and single-supply operation minimize board space requirements.
• Protection Features: Short-circuit and thermal shutdown protection ensure robust and reliable operation.
• Ease of Use: Simplified design reduces the number of external components.
• Versatile: Suitable for a wide range of portable audio applications.

The LM4990MHX is designed for ease of use, requiring minimal external components. The amplifier includes integrated short-circuit and thermal shutdown protection to prevent damage from overload conditions. The device is available in a small TSSOP package, making it suitable for portable applications where board space is limited.

This headphone amplifier is an excellent choice for applications that require high-quality audio output in a compact and power-efficient package. Its performance and protection features make it a reliable choice for a wide range of portable audio applications.