LM49251TLX/NOPB

Audio Amplifiers Overview

The LM49251TLX/NOPB is a stereo audio subsystem integrating a Class G headphone amplifier and a Class D speaker amplifier with built-in speaker protection. Designed for portable applications, it delivers high-quality audio performance within a compact footprint. The device supports dual-channel operation, combining efficient Class D output for speakers with a Class G topology for headphones to optimize power consumption and sound fidelity across varying load conditions.

Audio Amplifiers Feature Summary

• Integrates Class G headphone amplifier for optimized efficiency and audio quality
• Includes Class D speaker amplifier with integrated speaker protection circuitry
• Provides a complete stereo audio solution in a single package

Audio Amplifiers Applications

• Portable media players
• Mobile phones
• MP3 players

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor, when sourcing this component. Confirm the specific suffix TLX/NOPB indicates tape-and-reel packaging and lead-free compliance. Ensure the part number matches the exact stereo audio subsystem configuration described in official datasheets to avoid confusion with similar mono or non-integrated amplifier variants.

Audio Amplifiers Selection Notes

Select this component for designs requiring a combined headphone and speaker drive solution in space-constrained portable electronics. It is suitable for applications needing both high-efficiency Class D amplification for speakers and low-distortion Class G amplification for headphones. Consider the BGA-14 package constraints and thermal management requirements associated with integrated audio subsystems during PCB layout.

Audio Amplifiers Part Context

This component belongs to the LM4925x series of stereo audio subsystems from Texas Instruments (formerly National Semiconductor). It is designed to replace discrete amplifier solutions by integrating multiple audio stages into one chip. The series targets consumer electronics where board space and power efficiency are critical design parameters.

Audio Amplifiers Replacement Considerations

LM49251TL/NOPB

Audio Amplifiers FAQ

What amplifier classes are integrated in the LM49251?

The LM49251 integrates a Class G headphone amplifier and a Class D speaker amplifier.

Does the LM49251 include speaker protection?

Yes, the device includes built-in speaker protection circuitry as part of its Class D speaker amplifier stage.