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Adafruit Industries LLC
MAX98357A I²S 3W Class D Amplifier Breakout Board
Adafruit Industries LLC
PAM8302 Adafruit Mono 2.5W Class D Audio Amplifier
 
Adafruit Industries LLC
Stereo 2.8W Class D Audio Amplifier TS2012
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PAM8302 Adafruit Mono 2.5W Class D Audio Amplifier

PAM8302 Adafruit Mono 2.5W Class D Audio Amplifier

Adafruit Industries LLC

This super small mono amplifier is surprisingly powerful able to deliver up to 2.5W 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, it is very efficient (over 90% efficient when driving an 8Ω 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 you could barely tell it got hot. There is 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 do not have differential outputs, simply tie the Audio- pin to ground. The output is "Bridge Tied" - which means the output pins connect directly to the speaker pins, no connection to ground.

Specifications
  • Amplifier Type:Class D
  • Board Type:Fully Populated
  • Max Output Power x Channels @ Load:2.5W x 1 @ 4Ohm
  • Output Type:1-Channel (Mono)
  • Supplied Contents:Board(s)
  • Utilized IC / Part:PAM8302A
  • Voltage - Supply:2V ~ 5.5V
Parts
Associated Product
Diodes Incorporated Class D Amplifier
Category: Semiconductors, Development Tools-Integrated Circuits (ICs)-Linear-Amplifiers-Audio Amplifiers-Class D-1 Channel (Mono)