MAX9779 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – 2.6W Stereo Audio Power Amplifier and DirectDrive Headphone Amplifier

19-3766; Rev 0; 7/05
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2.6W Stereo Audio Power Amplifier and
DirectDrive Headphone Amplifier
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 pro-
duces 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-distor-
tion amplification of the audio signal through the Class
AB speaker amplifiers.
The MAX9779 features a single-supply voltage, a shut-
down mode, logic-selectable gain, and a headphone
sense input. Industry-leading click-and-pop suppres-
sion eliminates audible transients during power and
shutdown cycles.
The MAX9779 is offered in a space-saving, thermally effi-
cient 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
Notebook PCs
Tablet PCs
Flat-Panel TVs
Multimedia Monitors
Portable DVD Players LCD Projectors
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)
Simplified Block Diagram
AB
Ordering Information
PART
TEMP RANGE
MAX9779ETI+
-40°C to +85°C
+_{Denotes lead-free package.}
*EP = Exposed paddle.
PIN-PACKAGE
28 Thin QFN-EP*
AB
MAX9779
GAIN
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.