{"product_id":"adafruit-stemma-audio-amp-mono-2-5w-class-d-pam8302","title":"Adafruit STEMMA Audio Amp - Mono 2.5W Class D - PAM8302","description":"\u003cp\u003eThe Adafruit STEMMA Audio Amp is a super small mono amplifier that is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, it's very efficient (over 90% efficient when driving an 8Ω speaker at over half 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. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic \"LM386\" amps!\u003c\/p\u003e \u003cp\u003eThis board is a simplified version of our breadboard-friendly \u003ca href=\"\/ru\/products\/adafruit-mono-2-5w-class-d-audio-amplifier-pam8302\"\u003eAdafruit Mono 2.5W Class D Audio Amplifier board\u003c\/a\u003e. This version is designed to be 'plug and play' - with no soldering required. You can input the audio via the JST-PH 3 Pin connector - such as a \u003ca href=\"\/ru\/products\/stemma-jst-ph-3-pin-to-male-header-cable-200mm\"\u003epin header cable\u003c\/a\u003e or one with \u003ca href=\"\/ru\/products\/jst-ph-3-pin-plug-to-color-coded-alligator-clips-cable\"\u003ealligator clips\u003c\/a\u003e. The trade-off is that this board doesn't have differential inputs, instead, the audio inputs are referenced to the power\/signal ground wire.\u003c\/p\u003e \u003cp\u003eThe input to the amplifier goes through 1.0uF capacitors so you can have DC. The output is \"Bridge Tied\" - which means the output pins connect directly to the speaker pins, with no connection to the ground. The output is a high frequency 250KHz 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 \u003cp\u003eComes with a fully assembled and tested breakout board. We also include a header to plug it into a breadboard and a 3.5mm screw-terminal block so you can easily attach\/detach your speaker. You will be ready to rock in 15 minutes! The speaker is not included, use any 4 ohms or greater impedance speaker.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eOutput Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with 5.5V Supply\u003c\/li\u003e \u003cli\u003e50dB PSRR at 1KHz\u003c\/li\u003e \u003cli\u003eFilterless design, with ferrite bead + capacitors on output.\u003c\/li\u003e \u003cli\u003eFixed 24dB gain, onboard trim potentiometer for adjusting input volume.\u003c\/li\u003e \u003cli\u003eThermal and short-circuit\/over-current protection\u003c\/li\u003e \u003cli\u003eLow current draw: 4mA quiescent and 0.5mA in shutdown (due to pullup resistor on SD pin)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eNote: The terminal block included with your product may be blue or black.\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"560\" height=\"315\" src=\"\/\/www.youtube.com\/embed\/ZxPnngUJ4mA?start=181\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":50847656870161,"sku":"ADA5647","price":4.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/adafruit-stemma-audio-amp-mono-2-5w-class-d-pam8302-adafruit-ada5647-40623593783491.jpg?v=1735217483","url":"https:\/\/abcd3032.myshopify.com\/ru\/products\/adafruit-stemma-audio-amp-mono-2-5w-class-d-pam8302","provider":"Tayyab Zak","version":"1.0","type":"link"}