MAX9752BETI+T

Audio Amplifiers Overview

The MAX9752BETI+T 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 for the speaker section and 3V to 5.5V for the headphone section. The device delivers 2.2W per channel into a 4Ω load and provides 62mW into a 16Ω headphone load. It features analog volume control, a BEEP input, and logic-selectable gain of 19.5dB. Packaged in a 28-pin TQFN, it supports -40°C to +85°C operation.

Audio Amplifiers Feature Summary

• Integrates a high-efficiency filterless Class D speaker amplifier with a DirectDrive headphone amplifier that eliminates output DC-blocking capacitors.
• Includes analog volume control and a glitch-filtered BEEP input for audible alerts.
• Features industry-leading click-and-pop suppression and ±8kV ESD protection on headphone outputs.
• Utilizes spread-spectrum switching to minimize electromagnetic interference emissions.

Audio Amplifiers Applications

• Notebook PCs
• Flat-Panel TVs
• Tablet PCs
• Portable DVDs

Audio Amplifiers Procurement Notes

Verify the specific suffix ETI+T against the manufacturer's current ordering guide to confirm package type and lead-free status. Confirm availability as this component may be subject to lifecycle changes or discontinuation. Ensure the selected variant matches the required gain configuration and feature set compared to other models in the MAX9752/MAX9753/MAX9754 family.

Audio Amplifiers Selection Notes

Select this part when a combined speaker and headphone solution is required in a compact form factor. The MAX9752 variant is appropriate for designs needing analog volume adjustment and beep functionality. Consider the pin-for-pin compatibility with the MAX9750/MAX9751/MAX9755 series if a transition from Class AB topology is desired without redesigning the PCB footprint.

Audio Amplifiers Part Context

This component belongs to the MAX9752/MAX9753/MAX9754 family of low-EMI stereo Class D amplifiers. The MAX9752 specifically adds analog volume control and a BEEP input to the core amplifier architecture. It is designed to replace traditional Class AB amplifiers in portable electronics, offering higher efficiency and reduced external component count due to the filterless modulation scheme.

Audio Amplifiers Replacement Considerations

The MAX9750/MAX9751/MAX9755 are pin-for-pin compatible Class AB alternatives within the same family. Verify functional requirements such as gain settings and specific inputs like volume control or multiplexing when substituting with other members of the MAX975x series.

Audio Amplifiers FAQ

How does the DirectDrive architecture benefit the headphone amplifier?

DirectDrive uses a charge pump to create an internal negative supply, allowing the output to be biased about ground. This eliminates the need for large DC-blocking capacitors, saving board space and improving frequency response.

What is the purpose of the spread-spectrum mode in this amplifier?

The spread-spectrum mode varies the switching frequency randomly to flatten wideband spectral components, thereby reducing radiated electromagnetic interference (EMI) emissions from the speaker cables.