LM49150TL/NOPB

Audio Amplifiers Overview

The LM49150TL/NOPB is a mono Class-D audio amplifier subsystem manufactured by Texas Instruments, formerly National Semiconductor. It integrates an earpiece driver and stereo ground reference for portable devices. Key electrical parameters include a maximum output power of 2.1 W into a 32-ohm load, with a total harmonic distortion plus noise (THD+N) of 0.015%. The device operates on a single supply voltage ranging from 1.7 V to 5.5 V. It features a common mode rejection ratio of 55 dB and supports I²C control. The component is housed in a 20-pin uSMD package and functions within a temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Integrates a mono Class-D amplifier with dedicated earpiece driver and stereo ground reference
• Supports digital volume control via I²C interface
• Delivers high-fidelity audio with low total harmonic distortion plus noise
• Operates efficiently on low-voltage single-supply configurations

Audio Amplifiers Applications

• Portable media players requiring integrated headphone and speaker amplification
• Mobile phones and smartphones with limited board space
• Digital audio players (DAPs) utilizing I²C controlled volume adjustment
• MP3/MP4 players needing efficient Class-D audio output stages

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor, when sourcing this component. Confirm the specific suffix NOPB indicates lead-free and RoHS compliance. Ensure the package type matches the required 20-pin uSMD footprint for your PCB layout. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Audio Amplifiers Selection Notes

Select this component for applications requiring a combined mono speaker and stereo headphone amplifier solution. It is suitable for systems operating between 1.7 V and 5.5 V where space efficiency is critical. Consider the I²C interface requirement for volume control integration. Evaluate the 2.1 W output capability against the connected load impedance to ensure adequate performance without exceeding thermal limits.

Audio Amplifiers Part Context

This part belongs to the LM49150 series of audio subsystems designed for portable electronics. It combines multiple audio functions into a single IC to reduce component count and board area. The series is characterized by its ability to drive both earpieces and speakers from a single supply, making it a popular choice for compact multimedia devices.

Audio Amplifiers Replacement Considerations

The LM49150TLX/NOPB is a reel-packaged variant of the same functional device. Verify mechanical compatibility if switching between cut-tape and reel packaging formats. No direct cross-manufacturer substitutes are confirmed in the provided data.