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This super small mono amplifier is surprisingly powerful - able to
deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the
miniature chip is a class D controller, able to run from 2.0V-5.5VDC.
Since the amp is a class D, its very efficient (over 90% efficient
when driving an 8 speaker at over half a 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. There's
even a volume trim pot so you can adjust the volume on the board down
from the default 24dB gain. This board is a welcome upgrade to basic
"LM386" amps!

The A+ and A- inputs of the amplifier go through 1.0uF capacitors, so
they are fully 'differential' - if you don't have differential
outputs, simply tie the Audio- pin to ground. The output is "Bridge
Tied" - that means the output pins connect directly to the speaker
pins, no connection to ground. The output is a high frequency 250KHz
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. We also
include header to plug it into a breadboard and a 3.5mm screw-terminal
blocks so you can easily attach/detach your speaker. You will be ready
to rock in 15 minutes! Speaker is not included, use any 4 ohm or
greater impedance speaker.

* Output Power: 2.5W at 4, 10% THD, 1.5W at 8, 10% THD, with 5.5V
* 50dB PSRR at 1KHz
* Filterless design, with ferrite bead + capacitors on output.
* Fixed 24dB gain, onboard trim potentiometer for adjusting input
* Thermal and short-circuit/over-current protection
* Low current draw: 4mA quiescent and 1uA in shutdown mode

Dimensions (without 0.1" header):

* 15mm x 24mm x 2mm / 0.6" x 0.9" x 0.08"
* Weight: 1.4g


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General information

Manufacturer Adafruit Industries
Product type Elektronikmodul
Item number5998708
Manufacturer no.ada-2130

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Warranty & right to return

Warranty 24 month Bring-in

Limited right of return

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Adafruit Industries Adafruit Mono 2.5W Class D Audio Amplifier PAM8302 Adafruit Industries Adafruit Mono 2.5W Class D Audio Amplifier PAM8302