{"product_id":"led-dimmer-for-super-high-brightness-leds","title":"LED Dimmer for Super High Brightness LEDs","description":"\u003cp\u003eThis is a high-efficiency and reliability DC\/DC converter with a dimming feature for super high brightness LEDs.  The project is built using\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eL6902D\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003echip. L6902 is a complete and simple step-down switching regulator with adjustable current limit. The current control loop with external sense resistors R6, R7, and R8 are able to work in constant current mode providing up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e350mA\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoutput current with an accuracy of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5%\u003c\/strong\u003e.  Potentiometer\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePR1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehelps to control the dimming of the LEDs. PR1 is connected to the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3.3V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ereference pin of the chip. When the dimming (CS+) pin is grounded (0V) the maximum output current is provided (350mA) and vice versa when 3.3V is applied to the pin, the current provided is zero and so the LED is off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupply 24V DC (Range 8 to 24V DC)\u003c\/li\u003e\n\u003cli\u003eLoad 6 x LEDs in Series (High Brightness LEDs)\u003c\/li\u003e\n\u003cli\u003eOutput Current Adjustable 0 to 350mA\u003c\/li\u003e\n\u003cli\u003eShort Circuit or Over Current Protection\u003c\/li\u003e\n\u003cli\u003eSwitching Frequency DC-DC Converter 250Khz\u003c\/li\u003e\n\u003cli\u003e4 x 2.5MM Mounting Holes -PCB\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 40.64 x 26.04 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47201834303660,"sku":null,"price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/B128.jpg?v=1789377847","url":"https:\/\/dotfry.com\/products\/led-dimmer-for-super-high-brightness-leds","provider":"dotfry","version":"1.0","type":"link"}