General Description

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 patented 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.

Features

♦ 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)

Applications

    Notebook PCs

    Flat-Panel TVs

    Tablet PCs

    Multimedia Monitors

    Portable DVD Players

    LCD Projectors