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Part Number: MAX9757

 

 

 

 

Description: The MAX9756/MAX9757/MAX9758 combine dual, 2.3W,bridge tied load (BTL) stereo audio power amplifiers an...


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MAX9757 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.

MAX9757 Maximum Ratings

Supply Voltage (VDD, PVDD, HPVDD, CPVDD, IN to GND) ....+6V
PGND, CPGND to GND......................................................±0.3V
CPVSS, C1N, VSS to GND.....................................-6.0V to +0.3V
HP_ to GND ........................................................................±3V
Any Other Pin ...........................................-0.3V to (VDD + 0.3V)
Duration of OUT_ Short Circuit to GND or PVDD........Continuous
Duration of OUT_+ Short Circuit to OUT_- ................Continuous
Duration of HP_ Short Circuit to GND,
   VSS, or HPVDD.........................................................Continuous
Duration of OUT Short Circuit to GND........................Continuous
Continuous Current (PVDD, OUT_, PGND) ...........................1.7A
Continuous Current (CPVDD, C1N, CPGND, C1P, CPVSS,
   VSS, HPVDD, HP_, IN, OUT) .............................................0.85A
Continuous Input Current (all other pins) ......................±20mA
Continuous Power Dissipation (TA = +70°C, single-layer board)
  32-Pin Thin QFN (derate 18.6mW/°C above +70°C)..1490mW
  36-Pin Thin QFN (derate 20.4mW/°C above +70°C)..1633mW
Continuous Power Dissipation (TA =+70°C, multilayer board)
  32-Pin Thin QFN (derate 24.9mW/°C above +70°C)..1990mW
  36-Pin Thin QFN (derate 27.7mW/°C above +70°C)..2180mW
Junction Temperature .....................................................+150°C
Operating Temperature Range .........................-40°C to +85°C
Storage Temperature Range ...........................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

MAX9757 Features

` Automatic Level Control-Protects Speakers
` Analog Volume Control
` 120mW DirectDrive Headphone Amplifiers (16)
` 150mA Adjustable LDO
` Class AB, 2.3W, Stereo BTL Speaker Amplifiers (3)
` High 95dB PSRR
` Low-Power Shutdown Mode
` Industry-Leading Click-and-Pop Suppression
` Short-Circuit and Thermal Protection
` Beep Input

MAX9757 Typical Application

·Notebook PCs
·Tablet PCs
·Portable DVD
·Players
·Flat-Panel TVs
·PC Displays
·LCD Projectors
·Portable Audio

MAX9757 Connection Diagram

MAX9757  Connection Diagram

MAX9757 datasheet

MAX9757
PDF/DataSheet Download

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