{"product_id":"5-w-5-w-dual-btl-class-d-audio-amplifier","title":"5 W + 5 W Dual BTL Class-D Audio Amplifier","description":"\u003cp\u003eThe product described here is a high-efficiency dual BTL\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eclass-D\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eaudio amplifier with single supply operations. The project was built using\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTDA7491LP13TR\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efrom ST. The low profile PCB design can fit in a small area, operating power supply\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e9-12V DC\u003c\/strong\u003e, Project supports single-ended or differential audio signal inputs. Jumpers are provided to set the various gains, standby, and mute functions.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e5W + 5W Continuous Output Power, 10% THD, (8 Ohms Speaker) at 9V DC\u003c\/li\u003e\n\u003cli\u003eSingle Supply Operation 9V to 12V\u003c\/li\u003e\n\u003cli\u003eFour Selectable Fixed Gains Settings of nominally 20dB, 26dB, 30dB, 32dB Using Jumpers\u003c\/li\u003e\n\u003cli\u003eDifferential Inputs Minimize Common-Mode Noise\u003c\/li\u003e\n\u003cli\u003eJumper for Single-Ended Inputs\u003c\/li\u003e\n\u003cli\u003eNo “Pop” Sound at Turn-On\/Off\u003c\/li\u003e\n\u003cli\u003eThermal Over Load Protection\u003c\/li\u003e\n\u003cli\u003eStandby and Mute Features Using Jumpers\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 63.25 x 32.39 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMode Selection\u003c\/h3\u003e\n\u003cp\u003eThere are three operating modes defined bellow:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandby mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eall circuits are turned off, very low current consumption\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMute mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einputs are connected to the ground and the positive and negative PWM outputs are at 50% duty cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlay mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethe amplifiers are active\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eJumper Setting Standby, Mute and Play Mod\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e(Low=GND, High=3.3V)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandby Mode:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eJumper J2 =Low, Jumper J1 (Don’t Care Whether low or high)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMute Mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eJumper J2=High, Jumper J1 Low\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlay Mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eJumper J2 = High, Jumper J1 High\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAudio Signal Input (Single-Ended or Differential)\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferential audio signal can be feed directly to CN1 , PIN 1 to 4\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1 \u0026gt;\u0026gt; IA +Input A Channel, Pin 2\u0026gt;\u0026gt; AN -Input A Channel\u003c\/li\u003e\n\u003cli\u003ePin 3 \u0026gt;\u0026gt; NB +Input B Channel, Pin 4\u0026gt;\u0026gt; BN -Input B Channel\u003c\/li\u003e\n\u003cli\u003eFor Single Ended Input Solder Jumper J5 and J6 (Channel A Input Pin1 Signal and Pin 2 GND, Channel B Pin3 Signal and Pin 4 GND)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGain Setting (PCB Solder Jumper J3 and J4)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe gain of the TDA7491LP is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin 31). Internally, the gain is set by changing the feedback resistors of the amplifier.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJ3\u0026gt;\u0026gt;Low, J4\u0026gt;\u0026gt;Low =20dB (High=3.3V, Low=GND)\u003c\/li\u003e\n\u003cli\u003eJ3\u0026gt;\u0026gt;Low, J4\u0026gt;\u0026gt;High =26dB (High=3.3V, Low=GND)\u003c\/li\u003e\n\u003cli\u003eJ3\u0026gt;\u0026gt;High, J4\u0026gt;\u0026gt;Low =30dB (High=3.3V, Low=GND)\u003c\/li\u003e\n\u003cli\u003eJ3\u0026gt;\u0026gt;High, J4\u0026gt;\u0026gt;High =32dB (High=3.3V, Low=GND)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47241950822572,"sku":"A135","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/A135A.jpg?v=1789718665","url":"https:\/\/dotfry.com\/products\/5-w-5-w-dual-btl-class-d-audio-amplifier","provider":"dotfry","version":"1.0","type":"link"}