{"id":223645,"date":"2012-02-23T23:00:00","date_gmt":"2012-02-23T23:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/pilote-de-led-blanche-a-sortie-unique-pour-retro-eclairage-decran-lcd\/"},"modified":"2012-02-23T23:00:00","modified_gmt":"2012-02-23T23:00:00","slug":"pilote-de-led-blanche-a-sortie-unique-pour-retro-eclairage-decran-lcd","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/pilote-de-led-blanche-a-sortie-unique-pour-retro-eclairage-decran-lcd\/","title":{"rendered":"Pilote de LED blanche \u00e0 sortie unique pour r\u00e9tro-\u00e9clairage d\u2019\u00e9cran LCD"},"content":{"rendered":"

Ce pilote, qui intègre un convertisseur de courant mode “boost” avec un “switch” de puissance interne et une source de courant, est conçu pour fournir une solution robuste pour des applications telles que le multimédia automobile embarqué, combiné d’instruments et afficheur centralisé, afficheurs LCD industriels, lecteur DVD portables, scanners et luminaires à LED. Il peut fonctionner à partir d’une unique source tension comprise entre 4,5 et 40 volts permettant ainsi de travailler pendant le stop\/start, le démarrage à froid, en supportant le "load dump". La fréquence d’oscillation interne convertisseur boost est de 2 MHz au-dessus de la bande radio AM.<\/p>\n

Ce circuit présente une FMEA particulièrement robuste et performante. La surveillance permanente de l’état du système permet de déterminer les défauts et une sortie peut alerter le contrôleur. Si besoin, le flag de défaut peut être utilisé pour piloter un FET canal P externe pour déconnecter la source d’alimentation du système.<\/p>\n

Les protections internes permettent de supporter les courts-circuits et les surtensions, la diode  et la sortie LED en court-circuit où en circuit ouvert, l’inductance ou le "switch boost" en court-circuit, la résistance de définition du courant en court-circuit et la surchauffe du composant. Une fonction de limitation de courant double niveau, cycle par cycle permet un démarrage doux et protège le switch de courant interne des surintensités.<\/p>\n

Ce composant est présenté en boîtiers eMSOP-10 et eTSSOP-16. Plusieurs fréquences d’oscillateur sont disponibles pour couvrir les besoins clients.<\/p>\n

 <\/p>\n

www.allegromicro.com\/en\/Products\/Regulators-And-Lighting\/LED-Drivers-<\/a><\/p>\n

For-Backlighting\/A8513.aspx<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Allegro Microsystems Europe propose le A8513, un circuit de pilotage de LED blanche pour le r\u00e9tro-\u00e9clairage d\u2019afficheurs LCD. Ce composant est adapt\u00e9 aux applications automobiles et grand public pour ses performances et ses protections.<\/p>\n","protected":false},"author":22,"featured_media":223646,"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-223645","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Pilote de LED blanche \u00e0 sortie unique pour r\u00e9tro-\u00e9clairage d...<\/title>\n<meta name=\"description\" content=\"Allegro Microsystems Europe propose le A8513, un circuit de pilotage de LED blanche pour le r\u00e9tro-\u00e9clairage d\u2019afficheurs LCD. 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