LM4675SDX/NOPB

Audio Amplifiers Overview

The LM4675SDX/NOPB is a single-channel Class-D audio amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 2.4 V to 5.5 V and delivers up to 2.7 W of output power into a 4-ohm load. The device utilizes an 8-WSON (3x3 mm) surface-mount package with exposed pad for thermal management. Key electrical characteristics include differential input capability, integrated pop-and-click suppression, and protection against short circuits and thermal overload. It functions reliably across an operating temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Class-D topology provides high efficiency suitable for battery-powered applications
• Integrated pop-and-click suppression eliminates audible noise during power transitions
• Differential input configuration improves noise immunity in noisy environments
• Built-in short-circuit and thermal protection ensures robust operation under fault conditions

Audio Amplifiers Applications

• Portable media players and MP3 devices
• Bluetooth speakers and wireless audio modules
• Mobile phones and smartphones
• Personal navigation systems

Audio Amplifiers Procurement Notes

Verify the complete part number including suffixes such as NOPB and SDX to ensure correct RoHS compliance and tape-and-reel packaging specifications. Confirm that the supplier source aligns with Texas Instruments authorized distribution channels to guarantee component authenticity and traceability. Check datasheet revisions for any updates regarding mechanical dimensions or electrical parameters before finalizing procurement orders.

Audio Amplifiers Selection Notes

Select this component when designing compact audio systems requiring high efficiency and minimal external passive components. The 8-WSON package is ideal for space-constrained PCB layouts. Ensure the application load impedance matches the rated 4-ohm specification for optimal power delivery. Consider the differential input requirement for signal routing and verify that the supply voltage remains within the 2.4 V to 5.5 V operational window.

Audio Amplifiers Part Context

This device belongs to the Boomer family of audio amplifiers from Texas Instruments, designed for portable consumer electronics. It complements other members like the LM4670 by offering higher efficiency through Class-D architecture while maintaining small form factor requirements. The series focuses on simplifying design through integrated features that reduce bill-of-materials count.

Audio Amplifiers Replacement Considerations

Direct pin-to-pin replacements within the same package may include other variants from the LM4675 family, such as the LM4675SDBD. Verify equivalent power output ratings and thermal performance characteristics when substituting. Ensure compatibility with existing PCB footprints and thermal relief patterns.