• Previous
    Raspberry Pi Stepper Motor & Driver Board
  • Next
    5MP Camera for Raspberry Pi

Stereo 3.7W Class D Audio Amplifier (MAX98306)

In Stock
1,599.00
Product Code: RM3156

Delivered In: 15-20 Business Days

Description

Stereo 3.7W Class D Audio Amplifier (MAX98306)

This incredibly small stereo amplifier is surprisingly powerful; able to deliver 2 x 3.7W channels into 3 ohm impedance speakers it perfect for any portable projects, especially those using the Raspberry Pi! Inside the miniature chip is a class D controller, able to run from 2.7V - 5.5VDC. Since the amp is a class D, its incredibly efficient (over 90% efficient when driving an 8Ω speaker at over 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. 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 360KHz 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 header to plug it into a breadboard, 3.5mm screw-terminal blocks so you can easily attach/detach your speakers, and a 2x4 header + jumper to change the amplifier gain on the fly. You will be ready to rock in 15 minutes! Speakers are not included, use any 3ohm or greater impedance speakers. 
 
The Adafruit Stereo 3.7W Class D Audio Amplifier Features:
  • Output Power: 3.7W at 3Ω, 10% THD, 1.7W at 8Ω, 10% THD, with 5V Supply
  • Passes EMI limit unfiltered with up to 12 inches (30 cm) of speaker cable
  • High 83dB PSRR at 217Hz
  • Spread-Spectrum Modulation and Active Emissions Limiting
  • Five pin-selectable gains: 6dB, 9dB, 12dB, 15dB and 18dB. Select with a jumper or by setting the G and G' breakout pins (see schematic for breakout board showing gain pin settings for details)
  • Excellent click-and-pop suppression
  • Thermal and short-circuit/over-current protection
  • Low current draw: 2mA quiescent and 10uA in shutdown mode
  • Length:28.25mm/1.11in
  • Width:24.15mm/0.95in
  • Height:3.03mm/0.12in

Downloads

Reviews (0)

Write a review

Note: HTML is not translated!
    Bad           Good
Note : Images shown is only for representation. The actual product may vary with the picture shown.
Check out this bundle:
Bundle price:
1,848.00

You save
50.00!