LM4917MTX/NOPB

Audio Amplifiers Overview

The LM4917MTX/NOPB is a stereo headphone amplifier IC manufactured by Texas Instruments, formerly National Semiconductor. It features a ground-referenced architecture suitable for portable audio applications. The device delivers up to 95mW per channel into a 16-ohm load. It operates in Class AB topology and is housed in a 14-pin TSSOP package with a width of 4.40mm.

Audio Amplifiers Feature Summary

• Ground-referenced design optimized for single-supply operation
• Stereo output capability for dual-channel audio reproduction
• Class AB amplification for balanced efficiency and linearity

Audio Amplifiers Applications

• Portable MP3 players
• Mobile phones
• Handheld gaming devices

Audio Amplifiers Procurement Notes

Verify the manufacturer origin, as the component was originally from National Semiconductor before its acquisition by Texas Instruments. Confirm the suffix NOPB indicates lead-free compliance. Ensure the package type matches the required 14-TSSOP footprint for PCB layout compatibility.

Audio Amplifiers Selection Notes

Select this component when a low-power stereo solution is required for battery-operated devices. The ground-referenced input simplifies interface design with digital audio sources. Consider the 95mW output power limit relative to the connected headphone impedance to ensure adequate volume without distortion.

Audio Amplifiers Part Context

This part belongs to the LM4917 series of audio power amplifiers. It is designed specifically for driving headphones in consumer electronics. The series emphasizes low quiescent current and minimal external component count to reduce overall system cost and board space.

Audio Amplifiers Replacement Considerations

Check for direct pin-compatible alternatives within the same TI audio amplifier family. Verify that substitute parts maintain similar output power ratings and package dimensions to ensure mechanical fit.