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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

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 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

Applications/Uses

  • Desktop PCs
  • Hands-Free Car Phone Adapters
  • LCD Monitors
  • LCD Projectors
  • LCD TVs

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. 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.

Simplified Block Diagram

MAX9703, MAX9704: Block Diagram MAX9703, MAX9704: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .