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HALLOWEEN / ACCESSORIES / STEREO 20W CLASS D AUDIO AMPLIFIER - MAX9744
DESCRIPTION
Pump up the volume with this 20W stereo amplifier! This slim little board has a class D amplifier
onboard that can drive 2 channels of 4-8 ohm impedance speakers at 20W each. Power it with
5-12VDC using the onboard DC power jack and plug stereo line level into the 3.5mm stereo
headphone jack and jam out with ease. Since it's class D, its completely cool-running, no heat
sinks are required and it's extremely efficient - up to 93% efficiency makes it great for portable
or battery powered rigs.
We like the MAX9744 amplifier at the heart of this board because its very easy to use, but it also
has
both analog and digital
volume control capability. Use a single 1KΩ pot (we include one) to
adjust volume analog-style. Or hook it up to your favorite microcontroller and send I2C
commands to set 64-steps of volume amplification.
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Stereo 20W Class D
Audio Amplifier -
MAX9744
PRODUCT ID: 1752
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DESCRIPTION
TECHNICAL DETAILS
Some great stats about the MAX9744:
Power from 4.5V-14V DC voltage
Up to 93% efficient (88-93% typical)
20mA quiescent current (or put into shutdown for 1uA quiescent)
Up to 29.5dB max gain
Use DC or AC coupled line-level input, up to 3Vpp
Filterless Spread-Spectrum Modulation Lowers
Radiated RF Emissions from Speaker Cables
20W Stereo Output (4Ω, VDD = 12V, THD+N = 10%)
Low 0.04% THD+N
Integrated Click-and-Pop Suppression
Short-Circuit and Thermal-Overload Protection
We took this lovely chip and wrapped it up into a breakout for you, with polarity-protection,
jacks and terminal blocks, i2c level shifting, and a spot to solder in a volume pot.
Each order comes with one MAX9744 breakout board with all surface-mount parts fully
assembled and tested. We also include 3 x 2pin and 1 x 3pin terminal blocks, a 470uF power
filter capacitor and 1KΩ trim pot. To use this board, a little soldering is required to attach the
terminal blocks and other components, but its fairly easy and expect it should take less than 15
minutes. Check out our detailed tutorial for assembly instructions and overall usage
Note: The terminal blocks included with your product may be blue or black.
TECHNICAL DETAILS
LEARN
Dimensions (without 0.1" header or terminal blocks):
Length: 54mm / 2.1"
Width: 41mm / 1.6"
Height: 2mm / .08"
Weight: 11g
Datasheets, PCB files, Fritzing object and more in the tutorial!
Adafruit 20W Stereo Audio
Amplifier - MAX9744
Blast your tunes with a high-
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Jacquard loom weaves flowers and
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