{"product_id":"adafruit-tps61169-constant-current-boost-converter-for-leds","title":"Adafruit TPS61169 Constant Current Boost Converter for LEDs","description":"\u003cp\u003eThe \u003cstrong\u003eAdafruit Constant Current Boost Converter for LEDs\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003emakes driving LEDs easy, whether they're in series or parallel - with a chip that can generate up to 40V and 400mA from 3~5V input.\u003c\/p\u003e\n\u003cp\u003eUnlike most of Adafruit's booster chips that generate a fixed voltage (like 5V, or 12V) the \u003cstrong\u003eTPS61169\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eincreases the voltage until a set current is being drawn. That makes it excellent for LEDs, that are specified in current not voltage. Perfect for use with \u003ca rel=\"noopener\" href=\"\/collections\/led-filaments\" target=\"_blank\"\u003eLED noodles\u003cspan\u003e \u003c\/span\u003eand filaments\u003c\/a\u003e, where sometimes you need up to 12V or 24V, at 200mA or so. Also excellent when you have a bunch of 3V LEDs in series, so they add up to a high voltage, but only at 25mA or 50mA.\u003c\/p\u003e\n\u003cp\u003eAdafruit have used the \u003cstrong\u003eTPS61169\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003ein boards with LED backlights: its pretty common to see 5 to 7 white LEDs in series, and a 30mA current requirement. They like this chip because it has a 1.2A internal switch and automatic over-voltage protection in case the output is disconnected. You can also dim the LEDs via the PWM input pin. It's quiet, efficient, and fairly cool, with 90% efficiency. Since its constant current its \u003cem\u003enot \u003c\/em\u003egood when you need a fixed and stable voltage output like 5V -\u003cspan\u003e \u003c\/span\u003e\u003ca rel=\"noopener\" href=\"\/search?q=boost\" target=\"_blank\"\u003efor those cases, use Adafruit's everyday boosters\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eNote that you can get up to 40V and up to 400mA but not at the same time. To figure out the approximate power output you can achieve, use the formula: Iout = (Vin * 1.2A * 0.9 efficiency) \/ Vout. So for example, with 5V input, and approx. 12V output you can get 450mA out (the board is limited to 400mA on the switches). For a 24V nOOd, you can get about 225mA out. The current is selectable via mini DIP switches, the default is 25mA, and each switch adds 25mA\/50mA\/100mA\/200mA for a total of 400mA.\u003c\/p\u003e\n\u003cp\u003eYou get one fully assembled breakout with a TPS61169 and required passive components, and a small bit of header. Give 3 to 5V DC on the \u003cstrong\u003eIN \u003c\/strong\u003eand \u003cstrong\u003eG\u003c\/strong\u003eround pins or terminal block. Connect your LEDs on the output port, and you're instantly in business! Note if the output is shorted or opened, you may need to power cycle the chip to get it out of safe-shutdown mode.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/products\/snap-on-enclosure-for-adafruit-tps61169-breakout\" rel=\"noopener\" target=\"_blank\"\u003eCheck out the matching enclosure for added protection for your board!\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003eProduct Dimensions: 25.2mm x 19.0mm x 10.1mm \/ 1.0\" x 0.7\" x 0.4\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 3.8g \/ 0.1oz\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cimg height=\"80\" width=\"145\" alt=\"RoHS 2 2011 65 EU Compliant\" src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2011_65_EU.svg\"\u003e \u003cimg height=\"80\" width=\"145\" alt=\"RoHS 2 2015 863 EU Compliant\" src=\"https:\/\/www.adafruit.com\/includes\/templates\/shop2019\/images\/RoHS2_2015_863_EU.svg\"\u003e\u003c\/p\u003e\n\u003ch2\u003eLearn\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-tps61169-constant-current-boost-converter-for-leds\"\u003ePrimary Guide: Adafruit TPS61169 Constant Current Boost Converter for LEDs\u003c\/a\u003e\u003cbr\u003eDrive LEDs with ease\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/learn.adafruit.com\/products\/6354\/guides\" target=\"_blank\"\u003eSee all guides\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":55969489092987,"sku":"ADA6354","price":3.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/6354-00.jpg?v=1765540903","url":"https:\/\/shop.pimoroni.com\/products\/adafruit-tps61169-constant-current-boost-converter-for-leds","provider":"Pimoroni Ltd","version":"1.0","type":"link"}