{"id":222755,"date":"2011-10-23T22:00:00","date_gmt":"2011-10-23T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/pilote-de-led-pour-la-modulation-de-lumiere\/"},"modified":"2011-10-23T22:00:00","modified_gmt":"2011-10-23T22:00:00","slug":"pilote-de-led-pour-la-modulation-de-lumiere","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/pilote-de-led-pour-la-modulation-de-lumiere\/","title":{"rendered":"Pilote de LED pour la modulation de lumi\u00e8re"},"content":{"rendered":"

Ce circuit utilise une technique numérique qui lui permet de détecter les conditions de tensions CA d’entrée pour pouvoir créer un signal de référence interne spécifique et réduire le facteur de consommation. Il peut fonctionner également à partir d’une source de tension d’entrée  <\/span>DC. La technique traditionnelle consiste à utiliser un transformateur dans une application MR mais elle induit des pertes supplémentaires dans la conversion. Cette méthode est efficacement remplacée par le FL7701 qui gère directement  <\/span>et automatiquement les entrées DC ou AC. Ce composant associe une densité de fonctionnement élevée dans un petit circuit, ce qui a pour but de diminuer les coûts de nomenclature de 20% et de gagner 60% d’espace sur la carte. Il en résulte une solution qui convient aux PCB de taille réduite pour les applications d’éclairage LED et qui prend aussi en charge le modulateur de lumière analogique. Ce haut degré d’intégration apporte une haute fiabilité qui permet d’étendre la durée de vie des lampes à plus de 5 ans. Cette fiabilité est obtenue grâce à la suppression des condensateurs électrolytiques pour l’entrée, la sortie ou l’alimentation VDD. Avec un facteur de puissance numérique supérieur à 0,9, une diminution de la distorsion harmonique totale (THD) et une efficacité électrique de 90%, le  <\/span>FL7701 permet des économies d’énergie répondant aux normes internationales les plus rigoureuses comme l’Energy Star.
\nDisponible en boîtier SOP-8, il convient parfaitement aux ampoules de décoration intérieure, comme les ampoules LED ou les Downlights en PAR, Reflector, MR ou les classiques E26\/E27 ou base Bi-Pin, ainsi que des lampes LED pour des installations fixes d’éclairage basse consommation. Un choix complet de pilotes LED pour des puissances inférieures à 20 W, entre 20 et 50 W et supérieures à50 W est proposé. Ces contrôleurs hautement intégrés PWM et PFC réduisent le nombre de composants pour diminuer la taille des lampes et supprimer toute complexité de conception tout en améliorant l’efficacité de l’éclairage.  <\/span><\/p>\n

\n

\n

\n

www.fairchildsemi.com<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Fairchild Semiconductor a d\u00e9velopp\u00e9 le FL7701, un circuit pilote de lampes LED Buck intelligent,
\nnon isol\u00e9, avec correction de facteur de puissance.<\/p>\n","protected":false},"author":22,"featured_media":222756,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1149],"class_list":["post-222755","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Pilote de LED pour la modulation de lumi\u00e8re ...<\/title>\n<meta name=\"description\" content=\"Fairchild Semiconductor a d\u00e9velopp\u00e9 le FL7701, un circuit pilote de lampes LED Buck intelligent,\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/222755\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" 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