{"id":227606,"date":"2013-07-21T22:00:00","date_gmt":"2013-07-21T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/driver-de-led-multi-sorties-avec-interface-i%c2%b2c\/"},"modified":"2013-07-21T22:00:00","modified_gmt":"2013-07-21T22:00:00","slug":"driver-de-led-multi-sorties-avec-interface-i%c2%b2c","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/driver-de-led-multi-sorties-avec-interface-i%c2%b2c\/","title":{"rendered":"Driver de LED multi sorties avec interface I\u00b2C"},"content":{"rendered":"<p>Ce nouveau composant int&egrave;gre un convertisseur boost en mode courant avec un transistor de commutation interne et 10 sorties, r&eacute;gul&eacute;es en courant, programmables via l&rsquo;I&sup2;C. Il peut fournir un ratio de contraste allant jusqu&rsquo;&agrave; 5000 avec un PWM de dimming &agrave; 200Hz. Il fonctionne sur une plage de tension comprise entre 4.5V &agrave; 36V et est capable de tenir 40V pour les conditions de load-dump rencontr&eacute;es dans les syst&egrave;mes automobiles <br \/>\nL&rsquo;interface I&sup2;C permet &agrave; l&rsquo;utilisateur de r&eacute;gler le courant dans chaque branche individuellement jusqu&rsquo;&agrave; 60mA. Des branches adjacentes peuvent &ecirc;tre combin&eacute;es pour d&eacute;livrer un courant sup&eacute;rieur. Le rapport cyclique du PWM de dimming est aussi contr&ocirc;l&eacute; ind&eacute;pendamment dans chaque branche, et chaque branche peut &ecirc;tre ind&eacute;pendamment activ&eacute;e ou d&eacute;sactiv&eacute;e si besoin. Cette flexibilit&eacute; permet &agrave; l&rsquo;A8517 de commander une large gamme d&rsquo;applications &agrave; base de LED, et dans certain cas offre la possibilit&eacute; de remplacer deux drivers de LED ou plus par un seul.<br \/>\nL&rsquo;A8517 int&egrave;gre des protections contre les courts-circuits et les surtensions, les diodes en circuit ouvert ou en court-circuit, contre les broches LED en circuit ouvert ou en court-circuit, contre la bobine et le transistor de boost en court-circuit et contre les sur-temp&eacute;ratures. Une limitation de courant cycle par cycle double niveau prot&egrave;ge le transistor interne contre la commutation de sur-courant. Si besoin le circuit peux piloter un MOSFET externe canal P de d&eacute;connexion de l&rsquo;entr&eacute;e qui est command&eacute; par une mesure de courant interne.<br \/>\nL&rsquo;A8517KLPTR-T est disponible dans un boitier eTSSOP 28 broches.<\/p>\n<p><a target=\"_blank\" href=\"http:\/\/www.allegromicro.com\" title=\"www.allegromicro.com\" rel=\"noopener\">www.allegromicro.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le nouveau A8517 d&rsquo;Allegro Microsystems Europe est un driver de LED programmable multi sorties incorporant une interface I\u00b2C et con\u00e7u pour les applications automobiles telles que le r\u00e9tro\u00e9clairage de LCD, tableaux de bord et les feux de jour.<\/p>\n","protected":false},"author":22,"featured_media":227607,"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-227606","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Driver de LED multi sorties avec interface I\u00b2C ...<\/title>\n<meta name=\"description\" content=\"Le nouveau A8517 d&#039;Allegro Microsystems Europe est un driver de LED programmable multi sorties incorporant une interface I\u00b2C et con\u00e7u pour les applications...\" \/>\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\/227606\/\" \/>\n<meta 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