The LM4990MM is a Boomer® high performance audio power amplifier from National Semiconductor (now Texas Instruments). It's designed to deliver high-quality audio amplification for portable devices and other applications requiring efficient power usage. This amplifier is commonly used in cell phones, laptops, and other audio devices to provide clear and loud sound output.

Applications

• Cell Phones
• Laptops
• Portable Audio Players
• Speakerphones
• Other Portable Audio Devices

Features

• High Output Power (1W into 8Ω)
• Low THD+N (0.01% at 1kHz)
• Integrated Shutdown Mode
• Short Circuit Protection
• Thermal Overload Protection
• Available in MSOP Package

Benefits

• Loud and clear audio output for portable devices.
• High fidelity sound reproduction with minimal distortion.
• Extended battery life due to efficient power usage and integrated shutdown mode.
• Protection against damage from short circuits and overheating.
• Compact design suitable for space-constrained applications because of the MSOP package.

Technical Specifications

The LM4990MM can deliver 1W of continuous power into an 8Ω load with minimal distortion. The total harmonic distortion plus noise (THD+N) is typically 0.01% at 1kHz. The supply voltage range is usually between 2.4V and 5.5V. The shutdown mode reduces current consumption to a very low level. The device is housed in an MSOP (Mini Small Outline Package). The gain can be adjusted using external resistors. The operating temperature range typically covers consumer electronics requirements.

This audio amplifier provides a balance of high performance, low power consumption, and protection features, making it a popular choice for portable audio applications.