MAX9779

2.6W Stereo Audio Power Amplifier and DirectDrive Headphone Amplifier

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Overview

No DC-Blocking Capacitors Required—Provides Industry's Most Compact Notebook Audio Solution
PC2001 Compliant
5V Single-Supply Operation
Class AB 2.6W Stereo BTL Speaker Amplifiers
110mW DirectDrive Headphone Amplifiers
High 90dB PSRR
Low-Power Shutdown Mode
Industry-Leading Click-and-Pop Suppression
Low 0.01% THD+N at 1kHz
Short-Circuit and Thermal-Overload Protection
Selectable Gain Settings (15dB, 16.5dB, 18dB, and 19.5dB)
±8kV ESD-Protected Headphone Driver Outputs
Available in Space-Saving, Thermally Efficient Package
- 28-Pin Thin QFN (5mm x 5mm x 0.8mm)

The MAX9779 combines a stereo, 2.6W audio power amplifier and stereo DirectDrive® 110mW headphone amplifier in a single device. The headphone amplifier uses Maxim's DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and component height. A high 90dB PSRR and low 0.01% THD+N ensures clean, low-distortion amplification of the audio signal through the Class AB speaker amplifiers.

The MAX9779 features a single-supply voltage, a shutdown mode, logic-selectable gain, and a headphone sense input. Industry-leading click-and-pop suppression eliminates audible transients during power and shutdown cycles.

The MAX9779 is offered in a space-saving, thermally efficient 28-pin thin QFN (5mm x 5mm x 0.8mm) package. The device has thermal-overload and output short-circuit protection, and is specified over the extended -40°C to +85°C temperature range.

Applications