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Stereo 2.1W Class D Audio Amplifier - TPA2012

by Adafruit

This incredibly small stereo amplifier is surprisingly powerful - able to deliver 2 x 2.1W channels into 4 ohm impedance speakers (@ 10% THD).

Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, it's incredibly efficient (89% efficient when driving an 8Ω speaker at 1.5 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 ~300KHz 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. It also includes a dual mini DIP switch for setting the amplifier gain on the fly, 3.5mm screw-terminal blocks so you can easily attach/detach your speakers, and some header in case you want to plug it into a breadboard. You will be ready to rock in 15 minutes! Speakers are not included, use any 4 ohm or 8 ohm impedance speakers.

  • Output Power: 2.1W at 4Ω, 10% THD, 1.4W at 8Ω, 10% THD, with 5V Supply
  • PSRR: 77 dB typ @ 217 Hz with 6 dB gain
  • Designed for use without an output filter, when wires are kept at under 2"-4" long
  • Four pin-selectable gains: 6dB, 12dB, 18dB and 24dB. Select with the onboard switches or by setting the G0 and G1 breakout pins (see schematic for breakout board showing gain pin settings for details)
  • Excellent click-and-pop suppression
  • Thermal shutdown protection
  • Independent channel shutdown
  • Low current draw: typ 6mA quiescent and 1.5uA in shutdown mode

Check out the tutorial for more details!

Note: The terminal blocks included with your product may be blue or black.

TECHNICAL DETAILS

  • Dimensions (without 0.1" header): 22.96mm / 0.9" x 28.33mm / 1.11" x 4.97mm / 0.19"
  • Weight: 2.56g

Revision History: As of May 23, 2016 Adafruit have updated this breakout to use the TPA2012 rather than the TS2012. This is an overall-equivalent part with slightly less power output. You can use the two interchangeably for 99% of projects. The TS2012 has been discontinued!

Datasheets, schematics, PCB files, Fritzing object and more in the tutorial!

12 customer reviews

2 years ago
The one-liner installer works well on a clean install of Retropie. The amp is just enough to drive a T1-2121SD
by Pablo about Picade X HAT USB-C via REVIEWS.io
3 years ago
Upgraded my original Kickstarter Picade and needed this for Pi 4 compatibility. Works the charm- only wish is that audio was stereo. Other than that, it works well and was an easy upgrade! Recommended
by Chris about Picade X HAT USB-C via REVIEWS.io
4 years ago
Works perfect, very easy to setup, connecting all buttons, joystick and all has been as easy as it gets. Plus the on/off switch is a real treat compared to the old plug / unplug you're used to with the Raspberry Pi. Would recommend 100% !
by Anonyme about Picade X HAT USB-C via REVIEWS.io
5 years ago
This is a brilliant controller board for our arcade project, and makes it really easy to connect everything. We haven't tested it yet but it is a great board.
by Rodney about Picade X HAT USB-C via REVIEWS.io
5 years ago
Worked great, and even with covid shipping was really quick, Would purchase again.
by David about Picade X HAT USB-C via REVIEWS.io
5 years ago
Great service. My item was delivered next day after the order was placed. I would recommend them to order from/
by MARK about Picade X HAT USB-C via REVIEWS.io
6 years ago
An excellent bit of kit! I paired it with RetroPie and my 1980s Competition Pro joystick to create my own little piece of 8-bit gaming heaven...
by Paul about Picade X HAT USB-C via REVIEWS.io
6 years ago
This is a great little board! I wanted to power a Pi and Pi Display in a SmartPi case with USB-C for a bit more power and this was available at an opportune time. The +/- are placed with just enough space to solder a right angle connector and feed wires through the case to the display. Still waiting to get hold of a PSU but this is working well off a bench supply. Software was easy to install, and the IO will come in handy for any controls I want to add to my project.
by Richard about Picade X HAT USB-C via REVIEWS.io
6 years ago
Fast delivering nu air mail . Solide and proffessinal material . Runs perfect .
by Rob about Picade X HAT USB-C via REVIEWS.io
6 years ago
All in one solution for audio and single joystick. Could you make a 2 joystick and trackball model
by Anonymous about Picade X HAT USB-C via REVIEWS.io
6 years ago
Bought this for an arcade project along with a Pi 3 A+. Easy way to provide on/off switch functionality, an audio amp with speaker output and any extra buttons needed.
by James about Picade X HAT USB-C via REVIEWS.io

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