{"id":225025,"date":"2012-09-02T22:00:00","date_gmt":"2012-09-02T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/circuit-de-commande-de-led-fort-courant\/"},"modified":"2012-09-02T22:00:00","modified_gmt":"2012-09-02T22:00:00","slug":"circuit-de-commande-de-led-fort-courant","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/circuit-de-commande-de-led-fort-courant\/","title":{"rendered":"Circuit de commande de LED fort courant"},"content":{"rendered":"

Ce driver fonctionne sur la large gamme de  tensions d’entrée allant de 5 V à 50 V, bien adaptée pour les designs "stop\/start" tout en étant capable de tenir des conditions de double batterie et de "load dump". Il fournit une solution compétitive en utilisant un MOSFET et un minimum de composants externes. Le courant maximum est fixé avec une simple résistance externe et peut être modifié grâce à une entrée de référence de courant. Un contrôle direct par PWM est possible via l’entrée "enable" qui gère aussi le mode "shutdown".<\/p>\n

Le convertisseur DC\/DC peut être configuré en mode "boost" référencé soit à la masse soit à l’alimentation autorisant alors un fonctionnement "buck-boost". La topologie "buck-boost" utilisée s’assure qu’il n’y ait pas de courant dans les LED lors du mode "shutdown", ni de sur-courant lors de la mise sous tension. La fréquence de découpage peut être programmée entre 100 et 700 kHz, offrant ainsi la flexibilité pour minimiser les effets EMC\/EMI et les interférences avec la bande AM. Les diagnostiques embarqués et les 2 sorties d’erreur donnent les indications de sous-tension en entrée et en sortie, de sortie ouverte, de LED en court-circuit ou en sous courant. Le circuit peut être configuré pour fournir des protections contre les courts-circuits à l’alimentation et à la masse des LED, avec la caractéristique unique de détecter une ou plusieurs d’entre-elles en court-circuit.<\/p>\n

Encapsulé en un boîtier TSSOP 16 broches avec une semelle métallique pour améliorer la dissipation thermique, ce composant est spécifié pour la gamme de température de -40 °C à +125 °C.<\/p>\n

 <\/p>\n

www.allegromicro.com\/en\/Products\/Regulators-And-Lighting\/LED-Drivers-For-Lighting\/A6268.aspx<\/a><\/p>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Qualifi\u00e9 AEC-Q100 Grade 0, l\u2019A6268 d\u2019Allegro MicroSystems Europe est un circuit de commande de LED fort courant, en gamme automobile, pour des applications telles que les feux de croisement, feux de jour, et feux de brouillard. Il est bas\u00e9 sur un contr\u00f4leur DC\/DC qui fournit en sortie un courant constant programmable pour le pilotage en s\u00e9rie de LED.<\/p>\n","protected":false},"author":22,"featured_media":225026,"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-225025","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 fort courant ...<\/title>\n<meta name=\"description\" content=\"Qualifi\u00e9 AEC-Q100 Grade 0, l\u2019A6268 d\u2019Allegro MicroSystems Europe est un circuit de commande de LED fort courant, en gamme automobile, pour des...\" \/>\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\/225025\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Circuit de commande de LED fort courant\" \/>\n<meta property=\"og:description\" content=\"Qualifi\u00e9 AEC-Q100 Grade 0, l\u2019A6268 d\u2019Allegro MicroSystems Europe est un circuit de commande de LED fort courant, en gamme automobile, pour des applications telles que les feux de croisement, feux de jour, et feux de brouillard. 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