MAX9791AETI+

Audio Amplifiers Overview

The MAX9791AETI+ is a stereo audio amplifier IC integrating a Class D power amplifier, DirectDrive headphone amplifier, and an LDO regulator. It operates on a single supply voltage ranging from 2.7V to 5.5V. The device delivers up to 2.2W of output power into a 4Ω load with 1% THD+N at 5V. It features a 180mW headphone amplifier with low distortion and high PSRR. The component utilizes spread-spectrum modulation for EMI reduction and includes thermal overload and short-circuit protection.

Audio Amplifiers Feature Summary

• Integrates a stereo Class D speaker amplifier, DirectDrive headphone amplifier, and LDO regulator in a single package
• DirectDrive architecture eliminates the need for large DC-blocking capacitors by producing ground-referenced outputs
• Features wake-on-beep functionality to activate amplifiers upon detection of a qualified beep signal
• Includes industry-leading click-and-pop suppression and active emissions limiting circuitry

Audio Amplifiers Applications

• Notebook Computers
• Tablet PCs
• Portable Multimedia Players

Audio Amplifiers Procurement Notes

Verify the specific A suffix indicates the 4.75V LDO option when sourcing replacements. Confirm RoHS compliance and lead-free status as indicated by the plus sign. Ensure the 28-pin TQFN-EP package dimensions match the target PCB footprint. Check for availability constraints or limited stock situations common with legacy Maxim Integrated products.

Audio Amplifiers Selection Notes

Select this part for designs requiring integrated stereo audio amplification with direct-drive headphone capability. The 4.75V LDO output is suitable for powering logic or other components directly from the main supply. Consider the 28-pin TQFN package for space-constrained portable applications. Verify that the system meets Windows Vista Premium compliance requirements if applicable.

Audio Amplifiers Part Context

This component belongs to the MAX9791/MAX9792 family of Windows Vista-compliant Class D speaker amplifiers. It is manufactured by Analog Devices Inc./Maxim Integrated. The device is designed for portable multimedia applications requiring high efficiency and low electromagnetic interference. It replaces older discrete amplifier solutions by integrating multiple functions into a thermally efficient package.

Audio Amplifiers Replacement Considerations

MAX9791BETI+

Audio Amplifiers FAQ

How does the DirectDrive headphone amplifier differ from traditional designs?

It produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors.

What is the purpose of the wake-on-beep feature?

It wakes up the speaker and headphone amplifiers when a qualified beep signal is detected at the BEEP input.