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 1K 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.
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 (4,
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
1K 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 
Dimensions (without 0.1" header or terminal blocks):
* Length: 54mm / 2.1"
* Width: 41mm / 1.6"
* Height: 2mm / .08"
* Weight: 11g
http://learn.adafruit.com/adafruit-20w-stereo-audio-amplifier-class-d-max9744 … more
|Product type||Electronics module|
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Warranty 24 month Bring-in
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