501987 Stereo 3.7W Class D Audio Amplifier - MAX98306

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. Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC.
Categories
Prices are VAT included
€11.82 Price
€9.69 + VAT

 

Details

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

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

Specifications

Part. No. : 987

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Questions on Stereo 3.7W Class D Audio Amplifier - MAX98306

No questions asked yet

Register or Login to ask a question.
Register or Login to ask a question.
  1. STA540 Audio Amplifier Kit

    709612 STA540 Audio Amplifier Kit

    This is a stereo amplifier kit designed to make use of the STA540 power amplifier IC. Once this kit is completed you have a ffalse
    Excl. Tax:
    €30.72
    Incl. Tax:
    €37.48
      Compare
  2. Stereo 20W Class D Audio Amplifier - MAX9744

    807895 Stereo 20W Class D Audio Amplifier - MAX9744

    This slim little board has a class D amplifier onboard that can drive 2 channels of 4-8 ohm impedance speakers at 20W each. Pfalse
    Excl. Tax:
    €22.40
    Incl. Tax:
    €27.33
      Compare