LM48310SD/NOPB

Audio Amplifiers Overview

The LM48310SD/NOPB is an ultra-low electromagnetic interference (EMI), filterless, mono Class D audio power amplifier manufactured by Texas Instruments. It delivers 2.6W of continuous output power into a 4Ω load with less than 0.5% total harmonic distortion plus noise (THD+N) at a 5V supply voltage. The device operates from a single 2.7V to 5.5V supply and features the E2S modulation scheme for superior audio performance. It includes integrated short-circuit protection, thermal shutdown, and soft-start functionality.

Audio Amplifiers Feature Summary

• Ultra-low EMI generation via spread-spectrum modulation eliminates the need for external EMI filters.
• Filterless operation design reduces component count and board space requirements.
• Integrated E2S modulation provides high signal-to-noise ratio and low distortion.
• Built-in protection mechanisms include thermal shutdown and short-circuit current limiting.

Audio Amplifiers Applications

• Portable media players
• Mobile phones and smartphones
• Personal digital assistants (PDAs)
• MP3 players

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the package type is SOT-23-6 or similar small outline depending on specific revision. Ensure RoHS compliance status matches the NOPB suffix. Check for obsolescence status as older NS parts may be discontinued.

Audio Amplifiers Selection Notes

Select this component for applications requiring high efficiency and minimal external filtering in space-constrained portable devices. Compare against stereo variants like the LM48410 if dual-channel output is needed. Consider input voltage range and load impedance requirements to ensure the 2.6W power rating is sufficient for the speaker configuration.

Audio Amplifiers Part Context

This part belongs to the LM483xx series of Class D audio amplifiers designed for battery-powered consumer electronics. It represents a transition from National Semiconductor branding to Texas Instruments following the acquisition. The series focuses on reducing system cost through filterless designs while maintaining high audio fidelity.

Audio Amplifiers Replacement Considerations

LM48310SD/NOPB is functionally equivalent to LM48310SD. Verify pinout compatibility with existing PCB layouts. Alternative mono amplifiers from other manufacturers may require circuit redesign due to different control interfaces or protection thresholds.