LM4911LD/NOPB

Audio Amplifiers Overview

The LM4911LD/NOPB is a stereo Class AB audio amplifier designed for headphone applications. It operates on a single supply voltage ranging from 2V to 5.5V and delivers up to 145mW per channel into a 16-ohm load at 1kHz with a 2.4V supply. The device features ultra-low current shutdown mode, thermal protection, and high power supply rejection ratio (PSRR) of 65dB typical. It is housed in a compact 10-WSON package measuring 3x3mm.

Audio Amplifiers Feature Summary

• Ultra-low current shutdown mode for extended battery life
• Integrated thermal protection circuitry
• High power supply rejection ratio (PSRR)
• Capable of driving capacitive loads up to 500pF

Audio Amplifiers Applications

• Mobile phone headphone amplifiers
• Portable media players
• MP3 players
• Digital cameras
• Personal digital assistants (PDAs)

Audio Amplifiers Procurement Notes

Verify the specific suffix 'LD' indicates the 10-WSON (3x3mm) package variant distinct from other LM4911 packages like MM or QMM. Confirm AEC-Q100 qualification status if automotive grade is required, as standard LM4911 may differ. Ensure compatibility with 2V-5.5V supply rails and 16-ohm load requirements during integration.

Audio Amplifiers Selection Notes

Select this component for space-constrained portable devices requiring stereo audio output. The WSON package offers a smaller footprint compared to MSOP or TSSOP alternatives. Consider the 145mW output power limit when designing for higher impedance loads or higher voltage supplies. Verify thermal dissipation capabilities within the small package size.

Audio Amplifiers Part Context

This part belongs to the Texas Instruments Boomer series of audio amplifiers. It is a stereo version of the mono LM4910. The LM4911 family includes various package options such as MSOP, SOIC, and WSON. The NOPB suffix indicates lead-free and RoHS compliance. It is designed for low-voltage, low-power consumer electronics applications.

Audio Amplifiers Replacement Considerations

LM4911QMM/NOPB: Stereo amplifier in 10-VSSOP package. LM4911MMX/NOPB: Stereo amplifier in 10-MSOP package. LM4910LD/NOPB: Mono amplifier in 10-WSON package. Verify pinout and package dimensions match before substitution.