{"id":222235,"date":"2011-08-10T22:00:00","date_gmt":"2011-08-10T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/generateur-pwm-48-canaux-resolution-de-12-bits\/"},"modified":"2011-08-10T22:00:00","modified_gmt":"2011-08-10T22:00:00","slug":"generateur-pwm-48-canaux-resolution-de-12-bits","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/generateur-pwm-48-canaux-resolution-de-12-bits\/","title":{"rendered":"G\u00e9n\u00e9rateur PWM, 48 canaux, r\u00e9solution de 12 bits"},"content":{"rendered":"

Le LT8500 fonctionne sur une gamme de tensions d’entrée, de 3V à 5,5V, lui permettant d’être alimenté à partir d’une large gamme de tensions standard de bus. Pour les applications à LED, chaque canal possède un ajustement du courant sur 6-bits et un réglage de la luminosité par PWM, avec une échelle des gris sur 12-bits. Le temps de montée du LT8500, de 40ns, autorise de grands rapports de contraste. La correction et le contrôle de luminosité de l’échelle des gris sont, tous les deux, accessibles via une interface série en logique TTL\/CMOS. Le LT8500 présente deux drapeaux de diagnostic : erreur de synchronisation et LED ouverte. Les drapeaux sont envoyés avec une information d’état supplémentaire sur l’interface de données série, pendant la relecture des données d’état.  L’interface de données série, 50MHz, pouvant être mise en cascade, comprend un circuit tampon et d’équilibrage, facilitant la conception pour les applications à PWM comme le rétro-éclairage dynamique d’un grand écran LCD. La combinaison d’un nombre minimal de composants externes et d’un boîtier QFN de 5mm x 9mm, de 56 broches conduit à un produit d’empreinte très compacte pour les applications PWM à plusieurs canaux. Le LT8500IUHH, version de classe I, à gamme de températures plus large, est également disponible. <\/p>\n

www.linear.com\/product\/LT8500<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Linear Technology annonce le LT8500, un g\u00e9n\u00e9rateur \u00e0 modulation de largeur d’impulsion (PWM) comprenant 48 canaux. Chaque canal poss\u00e8de, individuellement, un registre PWM, r\u00e9glable sur 12-bits, et un registre de correction 6-bits (64 pas) \u00b1 50%. Tous les contr\u00f4les sont programmables via une simple interface de donn\u00e9es s\u00e9rie TTL\/CMOS \u00e0 50MHz. Le LT8500 peut \u00eatre employ\u00e9 dans une grande vari\u00e9t\u00e9 d’applications \u00e0 PWM comme le contr\u00f4le de LED, ainsi que les applications industrielles et de la robotique. Par exemple, le LT8500 peut \u00eatre utilis\u00e9 avec trois LT3595A, des pilotes de LED 16 canaux, pour fournir des guirlandes de 48 LED, \u00e0 contr\u00f4le de luminosit\u00e9 ind\u00e9pendant, pour r\u00e9gler localement la luminosit\u00e9 du r\u00e9tro-\u00e9clairage \u00e0 LED de grands afficheurs LCD. Le registre de correction permet un \u00e9quilibrage lumineux de chaque guirlande.<\/p>\n","protected":false},"author":22,"featured_media":222236,"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-222235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"G\u00e9n\u00e9rateur PWM, 48 canaux, r\u00e9solution de 12 bits ...<\/title>\n<meta name=\"description\" content=\"Linear Technology annonce le LT8500, un g\u00e9n\u00e9rateur \u00e0 modulation de largeur d'impulsion (PWM) comprenant 48 canaux. Chaque canal poss\u00e8de,...\" \/>\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\/222235\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"G\u00e9n\u00e9rateur PWM, 48 canaux, r\u00e9solution de 12 bits\" \/>\n<meta property=\"og:description\" content=\"Linear Technology annonce le LT8500, un g\u00e9n\u00e9rateur \u00e0 modulation de largeur d'impulsion (PWM) comprenant 48 canaux. Chaque canal poss\u00e8de, individuellement, un registre PWM, r\u00e9glable sur 12-bits, et un registre de correction 6-bits (64 pas) \u00b1 50%. Tous les contr\u00f4les sont programmables via une simple interface de donn\u00e9es s\u00e9rie TTL\/CMOS \u00e0 50MHz. Le LT8500 peut \u00eatre employ\u00e9 dans une grande vari\u00e9t\u00e9 d'applications \u00e0 PWM comme le contr\u00f4le de LED, ainsi que les applications industrielles et de la robotique. Par exemple, le LT8500 peut \u00eatre utilis\u00e9 avec trois LT3595A, des pilotes de LED 16 canaux, pour fournir des guirlandes de 48 LED, \u00e0 contr\u00f4le de luminosit\u00e9 ind\u00e9pendant, pour r\u00e9gler localement la luminosit\u00e9 du r\u00e9tro-\u00e9clairage \u00e0 LED de grands afficheurs LCD. Le registre de correction permet un \u00e9quilibrage lumineux de chaque guirlande.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/222235\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2011-08-10T22:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/import\/eci2255_lt8500.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1972\" \/>\n\t<meta property=\"og:image:height\" content=\"1409\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"eeNews Europe\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"eeNews Europe\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta 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