Data Sheet Rev. 1

Overview

Features and Benefits

  • Wide 4.5V to 14V Power-Supply Voltage Range
  • Filterless Spread-Spectrum Modulation Lowers Radiated RF Emissions from Speaker Cables
  • 20W Stereo Output (4Ω, VDD = 12V, THD+N = 10%)
  • Integrated Volume Control (I²C or Analog)
  • Low 0.04% THD+N
  • High 75dB PSRR
  • High 93% Efficiency
  • Integrated Click-and-Pop Suppression
  • Low-Power Shutdown Mode
  • Short-Circuit and Thermal-Overload Protection
  • Available in a 44-Pin Thin QFN-EP (7mm x 7mm x 0.8mm)

Product Details

The MAX9744 20W stereo Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and eliminating the need for a bulky heatsink. This device features single-supply operation, adjustable gain, shutdown mode, a SYNC output, speaker mute, and industry-leading click-and-pop suppression.

The MAX9744 features a 64-step dual-mode (analog or digital), programmable volume control and mute function. The MAX9744 operates from a 4.5V to 14V single supply and can deliver up to 20W per channel into a 4Ω speaker with a 14V supply.

The MAX9744 offers two modulation schemes: a fixed-frequency modulation mode that allows one of several preset switching frequencies to be selected, and a spread-spectrum modulation mode that helps to reduce EMI-radiated emissions.

The MAX9744 features high 75dB PSRR, low 0.04% THD+N, and SNR in excess of 90dB. Robust short-circuit and thermal-overload protection prevent device damage during a fault condition. The MAX9744 is available in a 44-pin thin QFN-EP (7mm x 7mm x 0.8mm) package and is specified over the extended -40°C to +85°C temperature range.

Applications

  • Flat-Panel Televisions
  • Multimedia Docking Stations
  • PC Speaker Systems

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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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