2.3W Stereo Speaker Amplifiers and DirectDrive Headphone Amplifiers
Description
19-3782; Rev 0; 8/05
ON KIT EVALUATI AVAILABLE
2.
3W Stereo Speaker Amplifiers and DirectDrive Headphone Amplifiers with Automatic Level Control
General Description
The MAX9756/MAX9757/MAX9758 combine dual, 2.
3W, bridge tied load (BTL) stereo audio power amplifiers and a DirectDriveTM headphone amplifier in a single device.
These devices feature single-supply voltage operation, shutdown mode, logic-selectable gain, a headphone sense input, a 31-step analog volume control, and industry-leading click-and-pop suppression.
The headphone amplifier uses Maxim’s patent-pending DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors.
The MAX9756/MAX9757 feature automatic level control (ALC) that automatically limits output power to the speaker in the event of an overpowered output.
The MAX9756/MAX9758s’ 150mA internal linear regulator provides a complete solution for DAC- or CODECbased designs.
The MAX9756/MAX9757/MAX9758 are offered in spacesaving, thermally efficient 32-pin (5mm x 5mm x 0.
8mm) and 36-pin thin QFN (6mm x 6mm x 0.
8mm) packages.
All devices are specified over the extended -40°C to +85°C temperature range.
♦ Analog Volume Control ♦ 120mW DirectDrive Headphone Amplifiers (16Ω) ♦ 150mA Adjustable LDO ♦ Class AB, 2.
3W, Stereo BTL Speaker Amplifiers (3Ω) ♦ High 95dB PSRR ♦ Low-Power Shutdown Mode ♦ Industry-Leading Click-and-Pop Suppression ♦ Short-Circuit and Thermal Protection ♦ Beep Input
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Features
♦ Automatic Level Control—Protects Speakers
MAX9756/MAX9757/MAX9758
Ordering Information
PART MAX9756ETX+ MAX9757ETJ+* MAX9758ETJ+* ALC √ √ — LDO √ — √ PIN-PACKAGE 36 Thin QFN-EP** 32 Thin QFN-EP** 32 Thin QFN-EP**
Applications
Notebook PCs Tablet PCs Portable DVD Players Flat-Panel TVs PC Displays LCD Projectors Portable Audio
Note: All devices specified for -40°C to +85°C operating temperature range.
+Denotes lead-free package.
*Future product—contact fa...
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