• MAX9744是一款20W、立體聲、D類揚(yáng)聲器放大器，帶有模擬和數(shù)字音量控制。
• 該器件是業(yè)內(nèi)僅有的工作于4.5V至14V電源的立體聲D類放大器，極大地減小了便攜式設(shè)計(jì)的成本和尺寸。
• 集成的擴(kuò)展頻譜、無需濾波調(diào)制免去了昂貴且體積龐大的LC濾波器，從而降低了EMI輻射，并節(jié)省了BOM成本。
• MAX9744是MP3塢站、掌中游戲機(jī)和平板電視等的理想選擇。

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