LM4911MM

Audio Amplifiers Overview

The LM4911MM is a stereo audio power amplifier from the Boomer series, designed for low-power portable systems. It delivers 40mW per channel into a 16-ohm load or 25mW into a 32-ohm load at 1V THD+N from a 3V supply. The device operates on a single supply voltage ranging from 2V to 5.5V. It features selectable capacitor-coupled or output capacitor-less (OCL) configurations, eliminating the need for bootstrap capacitors. Key electrical characteristics include a typical PSRR of 65dB and a maximum shutdown current of 2.0μA.

Audio Amplifiers Feature Summary

• Configurable output topology supporting both capacitor-coupled and OCL modes without external bootstrap components
• Ultra-low power consumption with a shutdown mode drawing a maximum of 2.0μA
• Integrated thermal shutdown protection mechanism for operational safety
• Fast turn-on capability via mute mode with less than 1mV output voltage change

Audio Amplifiers Applications

• Portable audio devices requiring low component count
• Battery-powered consumer electronics
• Headphone amplification circuits

Audio Amplifiers Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to confirm pinout compatibility and package dimensions. Ensure the selected variant meets the required operating temperature range and supply voltage specifications for the target application environment before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component when a stereo amplifier with minimal external circuitry is required. It is suitable for applications where space constraints prohibit large coupling capacitors. Consider the LM4911QMM/NOPB if automotive qualification under AEC-Q100 standards is necessary for the design.

Audio Amplifiers Part Context

This part belongs to Texas Instruments' Boomer audio amplifier family, which focuses on high-quality output with minimal external components. The LM4911 specifically addresses portable system needs by offering flexible output configurations and low standby current, distinguishing it from standard class-AB amplifiers that require larger passive components.

Audio Amplifiers Replacement Considerations

The LM4911QMM/NOPB serves as a qualified alternative for automotive applications. Verify pin-to-pin compatibility and ensure the replacement meets the specific thermal and electrical requirements of the existing design.