MAX9744 pdf datasheet

• MAX9744是一款20W、立体声、D类扬声器放大器，带有模拟和数字音量控制。
• 该器件是业内仅有的工作于4.5V至14V电源的立体声D类放大器，极大地减小了便携式设计的成本和尺寸。
• 集成的扩展频谱、无需滤波调制免去了昂贵且体积庞大的LC滤波器，从而降低了EMI辐射，并节省了BOM成本。
• MAX9744是MP3坞站、掌中游戏机和平板电视等的理想选择。

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 fixedfrequency
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
PC Speaker Systems
Multimedia Docking Stations