My Account

Wish List (0)

Saved Carts

Compare

Approved Re-Seller
Follow us on Facebook! Follow us on Twitter! Follow us on Instagram!

FREE UK DELIVERY ON ORDERS OVER £50 ex.VAT (T&C's APPLY)

Adafruit Stereo 3.7W Class D Audio Amplifier (MAX98306)

Product Code: ADA-0987

£10.00
Ex.Tax £8.33

Qty:

ADD TO BAG

In Stock: 40

Adafruit Stereo 3.7W Class D Audio Amplifier (MAX98306)
Adafruit Stereo 3.7W Class D Audio Amplifier (MAX98306)
Adafruit 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
  • Weight:2.33g
Tutorials
 
Downloads
Datasheets MAX98306.pdf
MAX98306-schematic.png
Reviews about Adafruit Stereo 3.7W Class D Audio Amplifier (MAX98306)
Average rating: 0 reviews
Total reviews: 0
Write your own review on this product.
Write review
Sort By 

Write a review

Name:


Your Review:
25-3000 characters
Note: HTML is not translated!

Rating:
Overall
Quality
Price
Usability
Add prosAdd cons

are you happy?

please confirm the selections below are correct

YES
CHANGE

Offensive
Foul Language
Irrelevant
Other (write below)