{"id":221747,"date":"2011-05-30T22:00:00","date_gmt":"2011-05-30T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/circuit-de-commande-de-led-simplifiant-la-conception\/"},"modified":"2011-05-30T22:00:00","modified_gmt":"2011-05-30T22:00:00","slug":"circuit-de-commande-de-led-simplifiant-la-conception","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/circuit-de-commande-de-led-simplifiant-la-conception\/","title":{"rendered":"Circuit de commande de LED simplifiant la conception"},"content":{"rendered":"

Combinant la commande de demi-pont et la correction de facteur de puissance ou PFC (Power Factor Correction) sur un seul circuit intégré, l’IRS2548D délivre un rendement de plus de 88 % pour une charge HBLED 40 V \/ 1,3 A, un rendement supérieur à celui des convertisseurs flyback concurrents à des puissances de 60 W et plus. En intégrant les deux étages de commande sur une seule puce, il constitue une solution intégrée d’alimentation de LED qui simplifie la conception et aide à réduire le coût total du système tout en réduisant sa consommation de manière significative. Ce circuit offre une atténuation PWM de la luminosité jusqu’à moins de 2 % et embarque des fonctions de protection telles que la protection programmable en surintensité pour la PFC et le demi-pont, l’immunité contre les blocages et la protection contre les décharges électrostatiques. L’IRS2548D comprend également un oscillateur à fréquence variable, un temps mort fixé en interne à 1,6 µs, un MOSFET d’amorçage (bootstrap), une diode Zener de verrouillage (clamp) 15,6 V sur Vcc et un démarrage à faible courant (250μA).<\/p>\n

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

L’IRS2548D d’International Rectifier est un circuit de commande d’alimentation \u00e0 commutation ou SMPS (Switched Mode Power Supply) destin\u00e9 aux applications d’\u00e9clairage par LED (Light Emitting Diode) \u00e0 fort rendement \u00e9nerg\u00e9tique comme l’\u00e9clairage de rues, de stades ou de th\u00e9\u00e2tres.<\/p>\n","protected":false},"author":22,"featured_media":221748,"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-221747","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Circuit de commande de LED simplifiant la conception ...<\/title>\n<meta name=\"description\" content=\"L'IRS2548D d'International Rectifier est un circuit de commande d'alimentation \u00e0 commutation ou SMPS 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