Adafruit Stereo 3.7W Class D Audio Amplifier - MAX98306

AdafruitSKU: EXP-R15-154

Price:
Sale price4,13 €

excl. VAT plus Versand

Stock:
Only 5 units left

Manufacturer article number: 987
Customs tariff number: 85340019
Country of origin: US

✔ Fast dispatch within 24 hours
✔ Shipping from Germany
✔ Encrypted payment

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 8? 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.

Features:
  • Output Power: 3.7W at 3O, 10% THD, 1.7W at 8O, 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:

  • Length:28.25mm
  • Width:24.15mm
  • Height:3.03mm
  • Weight:2.33g
Documents:

Encrypted payment

American Express Apple Pay Google Pay Maestro Mastercard PayPal Shop Pay SOFORT Union Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Additional information

Customs tariff number:
85340019

Country of origin:
US

This depends on where you are located. Once the order has been handed over to UPS, the delivery time in Germany is approx. 2-3 days, within Europe approx. 1 week.

We dispatch our articles with our shipping partner UPS.

Customer service

+49 (0)681 9659 0150

Get in touch with us

info@exp-tech.de

Contact form

You might also like
Recently viewed