LM4873LQ

Audio Amplifiers Overview

The LM4873LQ is a dual audio amplifier integrated circuit manufactured by National Semiconductor, now part of Texas Instruments. It features two independent Class AB amplifier channels designed for high-quality audio reproduction. The device integrates a dedicated stereo headphone amplifier section, allowing simultaneous operation with speaker outputs. It is housed in a compact 24-WQFN (4x5 mm) package with an exposed pad for thermal management. This component is engineered to deliver efficient power amplification while maintaining low distortion and high signal-to-noise ratios suitable for portable consumer electronics.

Audio Amplifiers Feature Summary

• Integrates dual Class AB audio amplifiers with a separate stereo headphone output stage
• Designed for high efficiency and low total harmonic distortion in portable applications
• Includes built-in pop-and-click suppression circuitry to minimize audible transients during power-up and power-down
• Utilizes a small footprint WQFN package to optimize board space in mobile devices

Audio Amplifiers Applications

• Portable media players and MP3 players
• Mobile phones and smartphones
• Digital audio players (DAPs)
• Car audio systems and infotainment units

Audio Amplifiers Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments due to acquisition history. Confirm the package type is 24-WQFN with exposed pad. Ensure the suffix LQ matches the required temperature range and packaging specifications. Cross-reference the datasheet revision date to ensure compatibility with current design requirements. Validate authenticity through authorized distributors to avoid counterfeit components.

Audio Amplifiers Selection Notes

Select this component when a dual-channel audio solution with integrated headphone driving capability is required. Consider the 24-WQFN package size constraints for dense PCB layouts. Evaluate the thermal performance requirements given the exposed pad design. Compare power supply voltage ranges against system battery configurations. Assess the need for pop-and-click suppression to meet user experience standards in portable devices.

Audio Amplifiers Part Context

The LM4873 series belongs to National Semiconductor's portfolio of audio power amplifiers designed for mobile communication devices. These components address the industry demand for high-fidelity audio in space-constrained environments. The integration of headphone amplifiers alongside speaker drivers reduces the bill of materials and simplifies system architecture for manufacturers of portable electronic gadgets.

Audio Amplifiers Replacement Considerations

Check for direct pin-compatible alternatives within the LM4873 family or similar TI/National Semiconductor audio amplifier lines. Verify that any substitute maintains the same 24-WQFN package dimensions and thermal characteristics. Ensure electrical parameters such as supply voltage range and output power match the original design specifications.