MAX9704

PRODUCTION

10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers

10W Stereo/15W Mono Class-D Amplifier Ideal for Flat-Panel TV and PC-Display Applications

Data Sheet (Rev. 9) Product Selection Table
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Overview

  • Filterless Class D Amplifier
  • Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods
  • Up to 78% Efficient (RL = 8Ω)
  • Up to 88% Efficient (RL = 16Ω)
  • 15W Continuous Output Power into 8Ω (MAX9703)
  • 2x10W Continuous Output Power into 8Ω (MAX9704)
  • 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 (0.2μA)
  • 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

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. 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 95dB. 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.

Applications

  • Desktop PCs
  • Hands-Free Car Phone Adapters
  • LCD Monitors
  • LCD Projectors
  • LCD TVs
MAX9704
10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers
MAX9703, MAX9704: Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 3

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Evaluation Kits

MAX9714EVKIT

OBSOLETE: Evaluation Kit for the MAX9704 and MAX9714

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Features and Benefits

This evaluation board is obsolete and no longer recommended.

  • 10V to 25V Single-Supply Operation
  • Up to 85% Efficiency
  • Drives 6W into 8Ω/8W into 16Ω Speaker
  • Differential or Single-Ended Input Modes
  • Pin-Selectable Switching Modulation and Switching Frequency Options
  • Pin-Selectable Gain Options
  • Low 0.04% THD+N
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

This evaluation board is obsolete and no longer recommended.

The MAX9714 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains the MAX9714 filterless class D amplifier. The EV kit is capable of delivering 6W into an 8Ω load and is designed to operate from a 10V to 25V DC power supply. The MAX9714 EV kit accepts differential or single-ended input signals and provides an option to select between different switching frequencies.

The MAX9714 EV kit can also evaluate the MAX9704 15W, filterless, class D amplifier.

Applications

  • Audio
  • Desktop PCs
  • Hands-Free Car Phone Adapters
  • High-End Notebook
  • LCD Monitors
  • LCD Projectors
  • LCD TVs
MAX9714EVKIT
OBSOLETE: Evaluation Kit for the MAX9704 and MAX9714

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