{"id":225848,"date":"2012-12-11T23:00:00","date_gmt":"2012-12-11T23:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/controleur-powerpath-de-trois-alimentations-a-priorites\/"},"modified":"2012-12-11T23:00:00","modified_gmt":"2012-12-11T23:00:00","slug":"controleur-powerpath-de-trois-alimentations-a-priorites","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-powerpath-de-trois-alimentations-a-priorites\/","title":{"rendered":"Contr\u00f4leur PowerPath de trois alimentations \u00e0 priorit\u00e9s"},"content":{"rendered":"

Ce contrôleur simplifie beaucoup les mises en œuvre, trouvant la source d’énergie à partir de plusieurs sources disparates usuelles dans les systèmes électroniques portables et de grande disponibilité. Dans de tels systèmes, un contrôleur à priorités est une solution meilleure qu’une simple diode-OU, particulièrement quand la source choisie n’est pas celle de tension la plus élevée. La commutation PowerPath est assurée par des MOSFET canal P externes, reliés entre eux deux par deux par leur source, avec une protection des portes à niveau de tension de 6 V. Le contrôle de commutation rapide, conçu avec soin, bloque les courants inverses et de recouvrement, tout en empêchant la tension de sortie de chuter. Une faible intensité de fonctionnement de 28 µA, une consommation en veille inférieure à 1 µA, et un mode arrêt rendent ce circuit bien adapté aux systèmes de sauvegarde alimentés sur batterie. Sa large gamme de tensions de fonctionnement convient à une gamme étendue de sources d’alimentation comme les prises murales, USB, firewire, les supercondensateurs et batteries d’accumulateurs acide-plomb, Li-ion et NiCd. Une mise en œuvre en cascade intégrée permet d’étendre le choix prioritaire au-delà de trois alimentations. Dans le but de minimiser les courants d’appel en entrée lors du démarrage, la première connexion est à démarrage progressif. Les sorties "drain ouvert" indiquent les alimentations qui sont dans leur fenêtre de tensions définies. L’hystérésis dans le cas de sous-tension et de surtension est réglable par une seule résistance.
\nSpécifié sur toutes les gammes de températures commerciales, industrielles et de l’automobile, ce composant est présenté en boîtiers QFN 24 broches de 4 x 4 mm et SSOP étroit de 24 broches.<\/p>\n<\/p>\n

www.linear.com\/product\/LTC4417<\/a><\/p>\n


\n<\/a><\/p>\n

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

Pour les syst\u00e8mes aliment\u00e9s de 2,5 V \u00e0 36 V, le contr\u00f4leur PowerPath LTC4417 de Linear Technology choisit l\u2019alimentation valide ayant la priorit\u00e9 la plus \u00e9lev\u00e9e parmi ses trois alimentations d\u2019entr\u00e9e, pour d\u00e9livrer la charge. La priorit\u00e9 est d\u00e9finie par l\u2019affectation donn\u00e9e \u00e0 une broche, une alimentation \u00e9tant consid\u00e9r\u00e9e valide si sa tension s\u2019est maintenue dans une fen\u00eatre de tension, d\u00e9finie par des seuils de sous\u2013tension et de surtension de pr\u00e9cision 1,5%, pendant 256 ms. Ce circuit prot\u00e8ge \u00e9galement la charge contre les tensions inverses en entr\u00e9e jusqu\u2019\u00e0 -42 V.<\/p>\n","protected":false},"author":22,"featured_media":225849,"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-225848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Contr\u00f4leur PowerPath de trois alimentations \u00e0 priorit\u00e9s ...<\/title>\n<meta name=\"description\" content=\"Pour les syst\u00e8mes aliment\u00e9s de 2,5 V \u00e0 36 V, le contr\u00f4leur PowerPath LTC4417 de Linear Technology choisit l\u2019alimentation valide ayant la priorit\u00e9 la...\" \/>\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\/225848\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Contr\u00f4leur PowerPath de trois alimentations \u00e0 priorit\u00e9s\" \/>\n<meta property=\"og:description\" content=\"Pour les syst\u00e8mes aliment\u00e9s de 2,5 V \u00e0 36 V, le contr\u00f4leur PowerPath LTC4417 de Linear Technology choisit l\u2019alimentation valide ayant la priorit\u00e9 la plus \u00e9lev\u00e9e parmi ses trois alimentations d\u2019entr\u00e9e, pour d\u00e9livrer la charge. 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