LM4962TL/NOPB

Audio Amplifiers Overview

The LM4962TL/NOPB is a ceramic speaker driver from Texas Instruments designed for portable applications. It features an integrated boost converter and BTL audio amplifier, delivering a typical 15Vpp output swing at 1% THD+N from a 3.2V supply. Key specifications include a quiescent current of 9mA in boosted ringer mode and 0.1µA shutdown current. The device incorporates click/pop elimination, soft-start functionality, over-current protection (OCP), and over-voltage protection (OVP).

Audio Amplifiers Feature Summary

• Integrated boost converter with external gain configuration capability.
• Advanced click and pop circuitry eliminates noise during transitions.
• Band-switch function enables dual-mode operation for receiver and loudspeaker.
• Includes internal thermal shutdown, OCP, and OVP mechanisms.

Audio Amplifiers Applications

• Smart Phones
• Mobile Phones and Multimedia Terminals
• PDA's, Internet Appliances, and Portable Gaming
• Portable DVD Players
• Digital Still Cameras/Camcorders

Audio Amplifiers Procurement Notes

Verify the package marking and date code against the official datasheet to confirm authenticity. Ensure the ordering suffix matches the required tape-and-reel or tube packaging format. Confirm RoHS compliance status as specified in the manufacturer's documentation before finalizing procurement orders.

Audio Amplifiers Selection Notes

Select this component when driving ceramic speakers in space-constrained portable devices. It is suitable for designs requiring a single-chip solution for both earpiece and loudspeaker modes. Consider the DSBGA package size for board real estate optimization and verify that the application supports the necessary external passive components for the boost converter.

Audio Amplifiers Part Context

This part belongs to the LM4962 family of Boomer audio power amplifiers. It is specifically engineered for ceramic speaker drivers, distinguishing it from standard audio amplifiers by its integrated DC-DC boost capability. The TL suffix indicates a specific tape-and-reel packaging variant within the broader LM4962 product line.

Audio Amplifiers Replacement Considerations

LM4962T

Audio Amplifiers FAQ

How does the Band-Switch function operate?

The Band-Switch allows one amplifier to serve both receiver and ringer modes. In ringer mode, the boost converter is active with gain set to BW1. In receiver mode, the boost is shut down, and the amplifier runs directly from the battery with gain set to BW2.

What is the purpose of the Flagout pin?

The Flagout pin indicates fault conditions such as over-current or over-voltage. It pulls low to indicate a fault and remains inactive when normal operation resumes after resetting the shutdown pins.