LM4911MMX/NOPB

Audio Amplifiers Overview

The LM4911MMX/NOPB is a stereo audio power amplifier from the Boomer family, manufactured by Texas Instruments. It operates on a supply voltage range of 2V to 5.5V and delivers up to 40mW per channel into a 16Ω load at 3V with 1% THD+N. The device supports selectable capacitor-coupled or output capacitor-less (OCL) configurations. Key electrical parameters include a typical PSRR of 65dB at 217Hz and 1kHz, a maximum shutdown current of 2.0μA, and a maximum mute current of 100μA. It features internal thermal shutdown protection and is housed in a 10-pin MSOP package.

Audio Amplifiers Feature Summary

• Configurable output topology allowing selection between standard capacitor-coupled or output capacitor-less (OCL) operation for flexible system design.
• Ultra-low power consumption capabilities featuring a dedicated shutdown mode with minimal current draw and a mute function for fast startup times.
• Integrated protection mechanisms including internal thermal shutdown to safeguard the device under fault conditions.
• High power supply rejection ratio (PSRR) performance to minimize noise interference from the power source.

Audio Amplifiers Applications

• Portable audio devices requiring low-power stereo amplification
• Mobile phones and handheld multimedia players
• Personal digital assistants (PDAs)
• MP3 players and portable media receivers

Audio Amplifiers Procurement Notes

Verify the specific suffix 'MMX/NOPB' against the manufacturer's official datasheet to confirm the MSOP-10 package type and lead-free (RoHS compliant) status. Ensure the order quantity matches the tape-and-reel packaging specifications provided in the official documentation. Cross-reference the part number with the latest revision history to avoid obsolete variants.

Audio Amplifiers Selection Notes

Select this component when a stereo Class-AB amplifier is needed for battery-operated applications with strict space constraints. It is suitable for designs requiring either capacitive or direct coupling outputs without external bootstrap components. Consider the 2V minimum supply voltage and 40mW output capability relative to the target speaker impedance and desired audio fidelity levels.

Audio Amplifiers Part Context

This part belongs to the Texas Instruments Boomer audio amplifier series, which focuses on high-quality sound reproduction with minimal external circuitry. The LM4911 variant specifically addresses portable electronics markets by offering configurable output stages and ultra-low quiescent current. It complements other members of the family like the LM4910 and LM4912, differing primarily in channel count and output power specifications.

Audio Amplifiers Replacement Considerations

The LM4911QMM/NOPB is a qualified automotive-grade alternative within the same family, sharing similar electrical characteristics but adhering to AEC-Q100 standards. Verify pin compatibility and thermal performance before substitution. Other Boomer series amplifiers may serve as functional replacements if output power and supply voltage requirements align.