LM4946TM/NOPB

Audio Amplifiers Overview

The LM4946TM/NOPB is a Class D audio amplifier subsystem manufactured by Texas Instruments. It integrates a mono amplifier and a stereo headphone driver within a single package. The device delivers 1.3W of output power into an 8-ohm load for the main channel and provides dual channels capable of 85mW each into 32-ohm loads for headphone applications. Designed for low-voltage operation, it utilizes a 25-pin uSMD package suitable for surface-mount assembly.

Audio Amplifiers Feature Summary

• Integrates a high-power mono amplifier with a dedicated stereo headphone driver in a compact form factor
• Operates as a Class D switching amplifier to maintain high efficiency and minimize heat generation
• Supports direct connection to speakers and headphones without requiring external coupling capacitors

Audio Amplifiers Applications

• Portable multimedia devices requiring integrated audio amplification
• Battery-powered consumer electronics needing efficient sound output
• Systems utilizing stereo headphone jacks alongside speaker outputs

Audio Amplifiers Procurement Notes

Verify the component authenticity through authorized Texas Instruments distributors or certified partners. Confirm the specific suffix NOPB indicates lead-free and RoHS compliance status. Ensure the ordering information matches the exact 25-pin uSMD package variant required for your PCB layout design.

Audio Amplifiers Selection Notes

Select this component when a design requires both a primary speaker amplifier and a secondary headphone driver from a single IC source. It is appropriate for applications where board space is limited and system efficiency is critical. Consider the 1.3W output capability against the specific impedance requirements of the connected audio transducers.

Audio Amplifiers Part Context

This part belongs to the Texas Instruments audio amplifier portfolio, specifically focusing on Class D technology. It serves as a subsystem solution rather than a standalone amplifier, combining multiple audio functions to simplify circuit design. The product line targets the consumer electronics market with an emphasis on integration and power management.

Audio Amplifiers Replacement Considerations

Consult official Texas Instruments documentation for verified cross-reference part numbers. Ensure any substitute maintains compatibility with the 25-pin uSMD footprint and supports the required voltage and power specifications for the intended application.