{"product_id":"cjmcu-832-pam8302-2-5w-single-channel-class-d-audio-power-amplifier-development-board","title":"CJMCU-832 PAM8302 2.5W Single Channel Class D Audio Power Amplifier Development Board","description":"\u003cstrong\u003eDescription:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e This 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 8?? 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! CJMCU  \u003cbr\u003e   \u003cbr\u003e The 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. CJMCU  \u003cbr\u003e   \u003cbr\u003e Comes with a fully assembled and tested board. We also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach\/detach your speaker. You will be ready to rock in 15 minutes!  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eFeatures:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e - Output Power: 2.5W at 4??, 10% THD, 1.5W at 8??, 10% THD, with 5.5V Supply  \u003cbr\u003e - 50dB PSRR at 1KHz  \u003cbr\u003e - Filterless design, with ferrite bead + capacitors on output.  \u003cbr\u003e - Fixed 24dB gain, onboard trim potentiometer for adjusting input volume.  \u003cbr\u003e - Thermal and short-circuit\/over-current protection  \u003cbr\u003e - Low current draw: 4mA quiescent and 1uA in shutdown mode  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eNote:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e Speaker is not included, use any 4 ohm or greater impedance speaker.  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003ePackage included:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e 1 x Audio Power Amplifier  \u003cbr\u003e   \u003cbr\u003e       \u003cbr\u003e    \u003cbr\u003e         \u003cbr\u003e     \u003cbr\u003e           ?              \u003cbr\u003e   \u003cbr\u003e     \u003cbr\u003e    \u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/0B\/4F\/90f6efc6-ddd5-b2b8-9161-857906d5234e.jpg\"\u003e,   \u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/0B\/4F\/97307431-f6a2-2b5b-b003-94ffdb7b2c24.jpg\"\u003e,   \u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/0B\/4F\/9b08bc5a-288b-e1e5-4db7-5d7f66dcef67.jpg\"\u003e   \u003cbr\u003e","brand":"ZHIQIAN","offers":[{"title":"Default Title","offer_id":43932718039235,"sku":"ZHIQIAN-023111","price":379.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/wrsss.com\/products\/cjmcu-832-pam8302-2-5w-single-channel-class-d-audio-power-amplifier-development-board","provider":"Wrsss","version":"1.0","type":"link"}