General Description

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, 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.

Features

♦ 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 (20W, 8Ω)

♦ 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)

Applications

  Flat-Panel Televisions

  PC Speaker Systems

  Multimedia Docking Stations