MAX9752BETI+

Audio Amplifiers Overview

The MAX9752BETI+ is a stereo Class D audio power amplifier with an integrated DirectDrive headphone amplifier. It operates from a single 4.5V to 5.5V supply, delivering 2.2W per channel into a 4Ω load. The device features logic-selectable gain of 19.5dB, analog volume control, and a BEEP input with glitch filter. It utilizes a filterless modulation scheme and spread-spectrum switching for low EMI. The package is a 28-pin TQFN (5mm x 5mm x 0.8mm) with an exposed paddle.

Audio Amplifiers Feature Summary

• Integrates a high-efficiency Class D speaker amplifier and a DirectDrive headphone amplifier in a single device.
• Employs a unique filterless modulation scheme that eliminates the need for external LC filters for short speaker cables.
• Features spread-spectrum switching to flatten wideband spectral components and improve EMI emissions.
• Includes comprehensive click-and-pop suppression and headphone sense input functionality.

Audio Amplifiers Applications

• Notebook PCs
• Flat-Panel TVs
• Tablet PCs
• PC Displays

Audio Amplifiers Procurement Notes

Verify the specific suffix 'B' indicates the fixed 19.5dB gain configuration as documented in the ordering information table. Confirm the package code matches the 28-pin TQFN specification. Ensure compatibility with the required 4.5V to 5.5V supply range for both speaker and headphone sections. Check for lead-free compliance status if required by assembly specifications.

Audio Amplifiers Selection Notes

Select this component when a compact solution combining Class D speaker amplification and DirectDrive headphone output is required. It is suitable for designs needing analog volume control and audible alert capabilities via the dedicated BEEP input. Consider its pin-for-pin compatibility with the MAX9750/MAX9751/MAX9755 series if transitioning from Class AB architectures.

Audio Amplifiers Part Context

This device belongs to the MAX9752/MAX9753/MAX9754 family of 2.2W low-EMI stereo Class D power amplifiers. The MAX9752 variant specifically adds analog volume control and a BEEP input compared to the base MAX9754 model. It shares the same core amplifier architecture and packaging as the other family members, differing primarily in auxiliary control features and gain settings.

Audio Amplifiers Replacement Considerations

The MAX9750/MAX9751/MAX9755 are pin-for-pin compatible Class AB alternatives. For direct substitution within the same family, verify gain requirements against MAX9752AETI+ (13.5dB) or MAX9752CETI+ (10.5dB). No other specific substitute part numbers are confirmed in the provided documentation.

Audio Amplifiers FAQ

What is the function of the BEEP input on the MAX9752?

The BEEP input provides an audible alert feature with an integrated glitch filter to prevent false triggering.

How does the DirectDrive architecture benefit the headphone amplifier?

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