{"product_id":"stereo-21w-class-d-audio-amplifier-tpa2012","title":"Stereo 2.1W Class D Audio Amplifier - TPA2012","description":"\u003cp\u003eThis 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 watts) - 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!\u003c\/p\u003e\n\u003cp\u003eThe 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 the ground. The outputs are \"Bridge Tied\" - which means they connect directly to the outputs, with no connection to the 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 to another amplifier, it should drive the speakers directly.\u003c\/p\u003e\n\u003cp\u003eComes with a fully assembled and tested breakout board with 1.0uF input capacitors. We also include 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! \u003cstrong\u003eSpeakers are NOT included\u003c\/strong\u003e, use any 4-ohm or 8-ohm impedance speakers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOutput Power: 2.1W at 4Ω, 10% THD, 1.4W at 8Ω, 10% THD, with 5V Supply\u003c\/li\u003e\n\u003cli\u003ePSRR: 77 dB typ @ 217 Hz with 6 dB gain\u003c\/li\u003e\n\u003cli\u003eDesigned for use without an output filter, when wires are kept at under 2\"-4\" long\u003c\/li\u003e\n\u003cli\u003eFour pin-selectable gains: 6dB, 12dB, 18dB and 24 dB. 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)\u003c\/li\u003e\n\u003cli\u003eExcellent click-and-pop suppression\u003c\/li\u003e\n\u003cli\u003eThermal shutdown protection\u003c\/li\u003e\n\u003cli\u003eIndependent channel shutdown\u003c\/li\u003e\n\u003cli\u003eLow current draw: typ 6mA quiescent and 1.5uA in shutdown mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck out the tutorial for more details!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote\u003c\/strong\u003e:\u003cstrong\u003e The terminal blocks included with your product may be blue or black.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eRevision History\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs of August 1st, 2024\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We added a pre-soldered terminal block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDimensions (without 0.1\" header): 22.96mm x 28.33mm x 4.97mm\u003c\/li\u003e\n\u003cli\u003eWeight: 2.56g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTutorial and Downloads\u003c\/li\u003e\n\u003cli\u003eTPA2012 Datasheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":52217217286432,"sku":"omd1787257276047","price":7.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/3231\/3120\/files\/stereo-21w-class-d-audio-amplifier---tpa2012_1.jpg?v=1787257281","url":"https:\/\/www.elmwoodbasket.shop\/products\/stereo-21w-class-d-audio-amplifier-tpa2012","provider":"My Store","version":"1.0","type":"link"}