{"product_id":"mono-2w-switch-mode-class-d-audio-power-amplifier","title":"Mono 2W – Switch-Mode (Class D) Audio Power Amplifier","description":"\u003cp\u003eThis is a compact size, mono, switch-mode (Class-D) audio power amplifier intended for multimedia and general-purpose high-power applications. It has greater than\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e87% efficiency\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand is capable of delivering\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2W\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emaximum continuous power to a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4Ω load\u003c\/strong\u003e. The project is designed to be driven by the line-out or headphone jack of a CD\/MP3 player or to be directly connected to any audio source. The project includes header connectors for speakers, power supply, and audio input for quick connection. The project also has 3x jumpers for frequency selection and shutdown action. The project is built using the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMAX4295\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003echip.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUndervoltage Lockout\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt low supply voltages, the MOSFETs in the H-bridge may have inadequate gate drive thus dissipating excessive power. The Undervoltage lockout circuit prevents the device from operating at supply voltages below\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e+2.2V\u003csub\u003edc\u003c\/sub\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLow-Power Shutdown Mode (Jumper J3 for Shutdown)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe MAX4295 has a shutdown mode that reduces power consumption and extends battery life. Driving\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSHDN\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003elow disables the H-bridge, turns off the circuit, and places the MAX4295 in a low-power shutdown mode. Connect SHDN to VCC using jumper 3 for normal operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Selection (Jumper J1 and J2 For Frequency Selection)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe MAX4295 has an internal logic-programmable oscillator controlled by FS1 and FS2 (see table below). The oscillator can be programmed to frequencies of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e125kHz, 250kHz, 500kHz,\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1MHz.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe working frequency should be chosen to best fit the user application. As a rule of thumb, choose\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ef\u003csub\u003eOSC\u003c\/sub\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto be 10x times the audio bandwidth. A lower switching frequency offers higher amplifier efficiency and lower THD but requires larger external filter components. A higher switching frequency reduces the size and cost of the filter components at the expense of THD and efficiency. In most applications, the optimal f\u003csub\u003eOSC\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003eis\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e250kHz.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eConnections and Other Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCN1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePin 1 and Pin 2 = VCC, Pin and Pin 4 = GND (VCC Supply 2.7V to 5.5V DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePin 1 and Pin 2 = Speaker 1, Pin 3 and Pin 4 = Speaker 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCN2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePin 2 Audio Signal Input, Pin 1 GND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJumpers J1 and J2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFrequency select pins FS1 and FS2. See Table for the shunt positions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJumper J3:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eShutdown selection, GND= Shutdown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePower LED\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Power Supply +2.7V to +5.5V Input Range (1.5A)\u003c\/li\u003e\n\u003cli\u003e2W Channel Output Power at 5V\u003c\/li\u003e\n\u003cli\u003e7W\/Channel Output Power at 3V\u003c\/li\u003e\n\u003cli\u003e87% Efficiency (RL = 4Ω, POUT = 2W)\u003c\/li\u003e\n\u003cli\u003eProgrammable PWM Oscillator Frequency Selection (125kHz, 250kHz, 500kHz, 1MHz)\u003c\/li\u003e\n\u003cli\u003eLow 0.4% THD+N (RL = 4Ω, fIN = 1kHz, fOSC = 250kHz)\u003c\/li\u003e\n\u003cli\u003eLow-Power Shutdown Mode\u003c\/li\u003e\n\u003cli\u003e1A Current Limit and Thermal Protection\u003c\/li\u003e\n\u003cli\u003eClick fewer Transitions into and Out of Shutdown\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 31.59 x 28.42 mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47036806004908,"sku":"A111","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/A111A.jpg?v=1787567635","url":"https:\/\/dotfry.com\/products\/mono-2w-switch-mode-class-d-audio-power-amplifier","provider":"dotfry","version":"1.0","type":"link"}