PAM8302 Adafruit 2.5W Class D Single Channel Audio Amplifier Board

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This super small mono amplifier is able_x000D_
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to deliver up to 2.5 Watts into 4-8 ohm impedance speakers._x000D_
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Inside the miniature chip is a class D controller,able to run from 2.0V-5.5VDC._x000D_
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It has built in thermal and over-current protection_x000D_
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but we could barely tell it got hot._x000D_
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There's even a volume trim pot so you_x000D_
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can adjust the volume on the board down from the default 24dB gain._x000D_
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The A+ and A- inputs of the amplifier go through 1.0uF capacitors,_x000D_
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so they are fully 'differential' - if you don't have differential outputs,_x000D_
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simply tie the Audio- pin to ground._x000D_
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The output is "Bridge Tied" - that means_x000D_
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the output pins connect directly to the speaker pins,no connection to ground._x000D_
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The output is a high frequency 250KHz square wave PWM_x000D_
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that is then 'averaged out' by_x000D_
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the speaker coil - the high frequencies are not heard._x000D_
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Speaker is not included, use any 4 ohm or greater impedance speaker._x000D_
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1.Output Power: 2.5W at 4, 10% THD, 1.5W at 8, 10% THD, with ` Supply_x000D_
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2.50dB PSRR at 1KHz_x000D_
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3.Filterless design, with ferrite bead + capacitors on output._x000D_
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4.Fixed 24dB gain, onboard trim potentiometer for adjusting input volume._x000D_
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5.Thermal and short-circuit/over-current protection_x000D_
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6.Low current draw: 4mA quiescent and 1uA in shutdown mode