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Part Number: MAX9704

 

 

 

 

Description: The MAX9703/MAX9704 mono/stereo class D audio power amplifiers provide class AB amplifier performance ...


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MAX9704 General Description


The MAX9703/MAX9704 mono/stereo class D audio power amplifiers provide class AB amplifier performance with class D efficiency, conserving board space and eliminating the need for a bulky heatsink. Using a class D architecture, these devices deliver up to 15W while offering up to 78% efficiency. Proprietary and patent-protected modulation and switching schemes render the traditional class D output filter unnecessary.

The MAX9703/MAX9704 offer two modulation schemes: a fixed-frequency mode (FFM), and a spread-spectrum mode (SSM) that reduces EMI-radiated emissions due to the modulation frequency. The device utilizes a fully differential architecture, a full bridged output, and comprehensive click-and-pop suppression.

The MAX9703/MAX9704 feature high 80dB PSRR, low 0.07% THD+N, and SNR in excess of 100dB. Short-circuit and thermal-overload protection prevent the devices from being damaged during a fault condition. The MAX9703 is available in a 32-pin TQFN (5mm x 5mm x 0.8mm) package. The MAX9704 is available in a 32-pin TQFN (7mm x 7mm x 0.8mm) package. Both devices are specified over the extended -40°C to +85°C temperature range.

MAX9704 Maximum Ratings

(All voltages referenced to GND.)
VDD to PGND, AGND .............................................................30V
OUTR_, OUTL_, C1N..................................-0.3V to (VDD + 0.3V)
C1P............................................(VDD - 0.3V) to (CHOLD + 0.3V)
CHOLD........................................................(VDD - 0.3V) to +40V
All Other Pins to GND.............................................-0.3V to +12V
Duration of OUTR_/OUTL_
Short Circuit to GND, VDD .....................................................10s
Continuous Input Current (VDD, PGND) ...............................1.6A
Continuous Input Current.....................................................0.8A
Continuous Input Current (all other pins)........................±20mA
Continuous Power Dissipation (TA = +70°C)
MAX9703 32-Pin TQFN (derate 21.3mW/°C
above +70°C)............................................................1702.1mW
MAX9704 32-Pin TQFN (derate 33.3mW/°C
above +70°C)............................................................2666.7mW
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.

MAX9704 Features

♦ Filterless Class D Amplifier
♦ Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over
    Conventional Methods
♦ Up to 78% Efficient
♦ 15W Output Power into 8
♦ Up to 20W Peak Power
♦ Low 0.07% THD+N
♦ High PSRR (80dB at 1kHz)
♦ 10V to 25V Single-Supply Operation
♦ Differential Inputs Minimize Common-Mode Noise
♦ Pin-Selectable Gain Reduces Component Count
♦ Industry-Leading Click-and-Pop Suppression
♦ Low Quiescent Current (24mA)
♦ Low-Power Shutdown Mode (0.2A)
♦ Short-Circuit and Thermal-Overload Protection
♦ Available in Thermally Efficient, Space-Saving Packages
   32-Pin TQFN (5mm x 5mm x 0.8mm)MAX9703
   32-Pin TQFN (7mm x 7mm x 0.8mm)MAX9704

MAX9704 Typical Application

LCD TVs
LCD Monitors
Desktop PCs
LCD Projectors
Hands-Free Car
Phone Adaptors
Automotive

MAX9704 Connection Diagram

MAX9704  Connection Diagram

MAX9704 datasheet

MAX9704
PDF/DataSheet Download

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