This incredibly small stereo amplifier is surprisingly powerful - able
to deliver 2 x 2.8W channels into 4 ohm impedance speakers (@ 10%
THD). Inside the miniature chip is a class D controller, able to run
from 2.7V-5.5VDC. Since the amp is a class D, it's incredibly
efficient (89% efficient when driving an 8 speaker at 1.5 Watt) -
making it perfect for portable and battery-powered projects. It has
built in thermal and over-current protection but we could barely tell
it got hot. This board is a welcome upgrade to basic "LM386" amps!
The inputs of the amplifier go through 1.0uF capacitors, so they are
fully 'differential' - if you don't have differential outputs, simply
tie the R- and L- to ground. The outputs are "Bridge Tied" - that
means they connect directly to the outputs, no connection to ground.
The output is a ~300KHz square wave PWM that is then 'averaged out' by
the speaker coil - the high frequencies are not heard. All the above
means that you can't connect the output into another amplifier, it
should drive the speakers directly.
Comes with a fully assembled and tested breakout board with 1.0uF
input capacitors. We also include a dual mini DIP switch for setting
the amplifier gain on the fly, 3.5mm screw-terminal blocks so you can
easily attach/detach your speakers, and some header in case you want
to plug it into a breadboard. You will be ready to rock in 15 minutes!
Speakers are not included, use any 4 ohm or 8 ohm impedance speakers.
* Output Power: 2.8W at 4, 10% THD, 1.7W at 8, 10% THD, with 5V
* PSRR: 70 dB typ @ 217 Hz with 6 dB gain
* Designed for use without an output filter, when wires are kept at
under 2"-4" long
* Four pin-selectable gains: 6dB, 12dB, 18dB and 24dB. Select with
the onboard switches or by setting the G0 and G1 breakout pins
* Excellent click-and-pop suppression
* Thermal shutdown protection
* Independent channel shutdown
* Low current draw: 5mA quiescent and 2uA in shutdown mode
Dimensions (without 0.1" header):
* 22.96mm / 0.9" x 28.33mm / 1.11" x 4.97mm / 0.19"
* Weight: 2.56g … more
|Product type||Electronics module|
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Warranty 24 month Bring-in
Limited right of return
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