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Stereo 3.7W Class D Audio Amplifier - MAX98306

PRODUCT ID: 987
$8.95
QTY DISCOUNT
1-9$8.95
10-99$8.06
100+$7.16
  • Description

    Description-

    This incredibly small stereo amplifier is surprisingly powerful - able to deliver 2 x 3.7W channels into 3 ohm impedance speakers. 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.
     

    • 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
  • Technical Details

    Technical Details+

    Dimensions (without 0.1" header):

    • Length:28.25mm/1.11in
    • Width:24.15mm/0.95in
    • Height:3.03mm/0.12in
    • Weight:2.33g

    MAX98306 Datasheet

    Schematic for breakout board showing gain pin settings

  • Learn

    Learn+

    Speak like everyone's favorite baritone Sith lord or sing along with the Lollipop Guild!
    Records and plays a variety of audio formats
    Turn almost anything into a speaker with a bone conductor transducer.
    Pump some decent decibels with this tiny amp & speakers!
    Upgrade your Sega Game Gear with a Raspberry Pi and 3.5 inch TFT display!
    Retro gaming to the extreme, with 64x64 resolution!

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