MAX9750AETI+T

Audio Amplifiers Overview

The MAX9750AETI+T is a stereo audio power amplifier and DirectDrive headphone amplifier in a 28-pin Thin QFN package. It combines a 2.6W Class AB BTL speaker amplifier with a 110mW DirectDrive headphone driver. The device operates on a single 4.5V to 5.5V supply, featuring a 90dB PSRR and 0.01% THD+N. It includes analog volume control, a BEEP input, selectable gain settings, and industry-leading click-and-pop suppression.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for bulky DC-blocking capacitors by generating an internal negative supply via a charge pump.
• Integrated analog volume control and BEEP input with glitch filter for audible alert generation.
• Automatic headphone detection via HPS input switches between speaker and headphone modes.
• Comprehensive protection including thermal overload, output short-circuit, and ±8kV ESD protection on headphone outputs.

Audio Amplifiers Applications

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

Audio Amplifiers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the 'A' grade designation corresponds to the 13.5dB maximum gain setting. Ensure the component matches the lead-free/RoHS-compliant status indicated by the '+' suffix. Cross-reference the manufacturer's current datasheet revision to confirm pinout and electrical characteristics remain unchanged.

Audio Amplifiers Selection Notes

Select this part for designs requiring integrated speaker and headphone amplification without external coupling capacitors. The MAX9750 variant is required if analog volume control or BEEP functionality is needed, distinguishing it from the MAX9751 (MUX) and MAX9755 variants. Verify that the 28-pin Thin QFN footprint fits the PCB layout constraints and that the exposed paddle can be properly soldered to the ground plane for thermal management.

Audio Amplifiers Part Context

This component belongs to the MAX9750/MAX9751/MAX9755 family of 2.6W stereo audio power amplifiers and DirectDrive headphone amplifiers. These devices are designed for portable multimedia applications where space savings and high audio fidelity are critical. The family shares common features like low-power shutdown and click-and-pop suppression, while differing in input selection and control interfaces.

Audio Amplifiers Replacement Considerations

MAX9750BETI+ offers higher gain (19.5dB). MAX9750CETI+ provides lower gain (10.5dB). MAX9751ETI+ replaces the volume/BEEP controls with a 2:1 stereo input multiplexer. All share the same 28-pin Thin QFN package and pinout.