MAX9750BETI+

Audio Amplifiers Overview

The MAX9750BETI+ is a stereo audio power amplifier and DirectDrive headphone amplifier in a 28-pin Thin QFN package. It combines a Class AB 2.6W BTL speaker amplifier with a 110mW DirectDrive headphone driver. The device operates on a single 5V supply, features selectable gain settings of 19.5dB for the speaker amplifier, and includes an analog volume control and BEEP input. It provides high PSRR, low THD+N, and industry-leading click-and-pop suppression.

Audio Amplifiers Feature Summary

• Integrates a 2.6W Class AB stereo speaker amplifier and a 110mW DirectDrive headphone amplifier in a single device.
• DirectDrive architecture eliminates the need for large DC-blocking capacitors by generating a ground-referenced output from a single supply.
• Includes an analog volume control input and a BEEP input with glitch filtering for audible alerts.
• Features logic-selectable gain settings, headphone sense input for automatic mode switching, and comprehensive click-and-pop suppression.

Audio Amplifiers Applications

• Notebook PCs
• Flat-Panel TVs
• Tablet PCs
• PC Displays
• Portable DVD Players

Audio Amplifiers Procurement Notes

Verify the specific ordering suffix ETI+ corresponds to the 28-pin Thin QFN package configuration. Confirm that the BE suffix indicates the 19.5dB gain setting required for the application. Ensure compliance with RoHS standards as indicated by the plus sign in the part number. Cross-reference the manufacturer's latest documentation for any potential obsolescence or lifecycle changes.

Audio Amplifiers Selection Notes

Select this component when a combined speaker and headphone amplifier solution is needed to save board space. The 19.5dB gain setting is suitable for applications requiring higher speaker drive levels compared to other variants in the series. The integrated volume control simplifies system design by removing external potentiometers. Consider the thermal performance of the Thin QFN package for heat dissipation requirements.

Audio Amplifiers Part Context

This part belongs to the MAX9750/MAX9751/MAX9755 family of stereo audio amplifiers. These devices are designed to provide high-quality audio amplification for portable and desktop electronics. The family shares common features such as DirectDrive technology and click-and-pop suppression, differing primarily in gain settings and additional inputs like multiplexers or volume controls.

Audio Amplifiers Replacement Considerations

MAX9750AETI+

Audio Amplifiers FAQ

What is the maximum gain setting for the MAX9750BETI+?

The MAX9750BETI+ has a maximum gain setting of 19.5 dB for the speaker amplifier.

Does the MAX9750BETI+ require DC-blocking capacitors for the headphone output?

No, the DirectDrive architecture produces a ground-referenced output, eliminating the need for large DC-blocking capacitors.

What protection features are included in the MAX9750BETI+?

The device includes thermal-overload protection, output short-circuit protection, and ±8kV ESD protection on the headphone driver outputs.