LM48901SQ/NOPB

Audio Amplifiers Overview

The LM48901SQ/NOPB is a quad Class D audio amplifier manufactured by Texas Instruments, formerly National Semiconductor. It delivers 2.8W per channel into an 8-ohm load with a supply voltage range of 2.7V to 5.5V. The device integrates I2C and I2S interfaces for digital control and configuration. It features short-circuit and thermal protection mechanisms to ensure operational reliability. The component is housed in a 32-WQFN exposed pad package, suitable for space-constrained mobile applications.

Audio Amplifiers Feature Summary

• Integrates I2C and I2S digital interfaces for system control and audio data input
• Includes built-in depop circuitry to eliminate pop-and-click noises during power transitions
• Provides comprehensive protection against short circuits and excessive thermal conditions

Audio Amplifiers Applications

• Mobile phone audio subsystems
• Portable media players
• Smartphones with integrated audio codecs

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor's analog business. Confirm the suffix NOPB indicates lead-free and RoHS compliance. Ensure the package type matches the 32-WQFN specification. Cross-reference the part number with official TI datasheets to confirm pinout and electrical characteristics before integration.

Audio Amplifiers Selection Notes

Select this component when a quad-channel solution is required for multi-speaker mobile designs. The I2C interface allows dynamic gain adjustment and shutdown control via a microcontroller. Consider the 32-WQFN package for its small footprint and thermal performance. Verify that the 2.7V minimum supply voltage aligns with the system's battery profile.

Audio Amplifiers Part Context

This part belongs to the LM4890 family of audio amplifiers from National Semiconductor, now under Texas Instruments. The LM48901 variant specifically offers four channels, distinguishing it from mono or stereo counterparts like the LM4890. It targets high-density mobile electronics requiring multiple audio outputs within a limited board area.

Audio Amplifiers Replacement Considerations

Check for LM48901 variants with different package options such as DG or SQ if mechanical constraints differ. Verify compatibility with existing I2C addresses and register maps when substituting with other quad Class D amplifiers from the same family.