{"id":8861031560,"title":"Adafruit Audio IC Development Tools Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302","handle":"adafruit-audio-ic-development-tools-adafruit-mono-2-5w-class-d-audio-amplifier-pam8302","description":"\u003cp\u003eThis super small mono amplifier 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, its 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. \u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cspan\u003eThe A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin  to ground. The output is \"Bridge Tied\" - that means the output pins connect directly to the speaker pins, no connection to 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 into another amplifier, it should drive the speakers directly.\u003c\/span\u003e\u003c\/p\u003e","published_at":"2017-03-07T22:16:00-05:00","created_at":"2017-03-06T21:01:29-05:00","vendor":"Adafruit","type":"Adafruit","tags":["Breakout Boards","Sound"],"price":390,"price_min":390,"price_max":390,"available":true,"price_varies":false,"compare_at_price":395,"compare_at_price_min":395,"compare_at_price_max":395,"compare_at_price_varies":false,"variants":[{"id":31547912264,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"K185","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Adafruit Audio IC Development Tools Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302","public_title":null,"options":["Default Title"],"price":390,"weight":45,"compare_at_price":395,"inventory_quantity":20,"inventory_management":"shopify","inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-01.jpg?v=1488904284","\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-04.jpg?v=1488904287","\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-00.jpg?v=1488904288","\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-03.jpg?v=1488904291"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-01.jpg?v=1488904284","options":["Title"],"media":[{"alt":null,"id":345734479907,"position":1,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-01.jpg?v=1488904284"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-01.jpg?v=1488904284","width":1200},{"alt":null,"id":345734512675,"position":2,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-04.jpg?v=1488904287"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-04.jpg?v=1488904287","width":1200},{"alt":null,"id":345734545443,"position":3,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-00.jpg?v=1488904288"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-00.jpg?v=1488904288","width":1200},{"alt":null,"id":345734578211,"position":4,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-03.jpg?v=1488904291"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/2130-03.jpg?v=1488904291","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eThis super small mono amplifier 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, its 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. \u003c\/p\u003e \u003cp\u003e\u003cbr\u003e\u003cspan\u003eThe A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin  to ground. The output is \"Bridge Tied\" - that means the output pins connect directly to the speaker pins, no connection to 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 into another amplifier, it should drive the speakers directly.\u003c\/span\u003e\u003c\/p\u003e"}