{"id":222211,"date":"2011-08-06T22:00:00","date_gmt":"2011-08-06T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/controleur-dc-dc-abaisseur-a-large-gamme-de-tensions-dentree\/"},"modified":"2011-08-06T22:00:00","modified_gmt":"2011-08-06T22:00:00","slug":"controleur-dc-dc-abaisseur-a-large-gamme-de-tensions-dentree","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-dc-dc-abaisseur-a-large-gamme-de-tensions-dentree\/","title":{"rendered":"Contr\u00f4leur DC\/DC abaisseur, \u00e0 large gamme de tensions d&rsquo;entr\u00e9e"},"content":{"rendered":"<p>Une architecture &agrave; mode courant et &agrave; fr&eacute;quence constante permet de choisir une fr&eacute;quence fixe ou s&eacute;lectionn&eacute;e par boucle &agrave; verrouillage de phase, entre 250kHz et 750kHz. La d&eacute;tection du courant de sortie se fait en mesurant la chute de tension dans l&rsquo;inductance de sortie (DCR) ou en utilisant une r&eacute;sistance de d&eacute;tection d&rsquo;intensit&eacute; en option. Le repliement de caract&eacute;ristique d&rsquo;intensit&eacute; permet de limiter la dissipation. Le choix du mode de fonctionnement en continu, par saut d&rsquo;impulsion ou en Burst Mode, peut &ecirc;tre contr&ocirc;l&eacute; par l&rsquo;utilisateur pour optimiser le rendement aux faibles charges. Avec un rapport cyclique pouvant atteindre 99%, le LTC3851A\/-1 pr&eacute;sente une tr&egrave;s faible chute de tension, une caract&eacute;ristique utile pour accro&icirc;tre l&rsquo;autonomie des applications aliment&eacute;es sur batterie. Les caract&eacute;ristiques suppl&eacute;mentaires incluent le suivi de tension et un d&eacute;marrage progressif r&eacute;glable. Le LTC3851A-1 diff&egrave;re du LTC3851A de par un drapeau d&rsquo;&eacute;tat &quot;&nbsp;puissance correcte&nbsp;&quot; &agrave; la place d&rsquo;un r&eacute;glage de la limitation du courant.<br \/>\nLes LTC3851AH\/-1 et LTC3851AMP\/-1 sont disponibles en un bo&icirc;tier MSOP-16, &agrave; performances thermiques renforc&eacute;es. Pour plus d&rsquo;informations, visiter le site <a href=\"http:\/\/www.linear.com\/product\/LTC3851A\">www.linear.com\/product\/LTC3851A<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linear Technology annonce les versions de classes H et MP du LTC3851A, un contr\u00f4leur DC\/DC, abaisseur, synchrone, \u00e0 large gamme de tensions d&rsquo;entr\u00e9e (4V \u00e0 38V), convenant \u00e0 une large gamme d&rsquo;applications, comprenant la plupart des tensions interm\u00e9diaires de bus et de batteries chimiques. Les robustes pilotes de grille de MOSFET, embarqu\u00e9s, permettent l&#8217;emploi de MOSFET externes, de forte puissance, pour fournir des intensit\u00e9s en sortie jusqu&rsquo;\u00e0 25A, sur une gamme de tensions de sortie de 0,8V \u00e0 5,5V, ce qui est id\u00e9al pour les points de distribution d&rsquo;\u00e9nergie. Ces versions de classes H et MP sont test\u00e9es et garanties pour fonctionner avec une temp\u00e9rature de jonction dans les gammes respectives, &#8211; 40\u00b0C \u00e0 150\u00b0C et \u2013 55\u00b0C \u00e0 150\u00b0C. Les applications incluent les syst\u00e8mes de l&rsquo;automobile, de l&rsquo;industrie, du domaine m\u00e9dical, de communication de donn\u00e9es et des t\u00e9l\u00e9communications.<\/p>\n","protected":false},"author":22,"featured_media":222212,"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-222211","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Contr\u00f4leur DC\/DC abaisseur, \u00e0 large gamme de tensions d&#039;entr\u00e9e ...<\/title>\n<meta name=\"description\" content=\"Linear Technology annonce les versions de classes H et MP du LTC3851A, un contr\u00f4leur DC\/DC, abaisseur, synchrone, \u00e0 large gamme de tensions d&#039;entr\u00e9e (4V...\" \/>\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\/222211\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Contr\u00f4leur DC\/DC abaisseur, \u00e0 large gamme de tensions d&#039;entr\u00e9e\" \/>\n<meta property=\"og:description\" content=\"Linear Technology annonce les versions de classes H et MP du LTC3851A, un contr\u00f4leur DC\/DC, abaisseur, synchrone, \u00e0 large gamme de tensions d&#039;entr\u00e9e (4V \u00e0 38V), convenant \u00e0 une large gamme d&#039;applications, comprenant la plupart des tensions interm\u00e9diaires de bus et de batteries chimiques. Les robustes pilotes de grille de MOSFET, embarqu\u00e9s, permettent l&#039;emploi de MOSFET externes, de forte puissance, pour fournir des intensit\u00e9s en sortie jusqu&#039;\u00e0 25A, sur une gamme de tensions de sortie de 0,8V \u00e0 5,5V, ce qui est id\u00e9al pour les points de distribution d&#039;\u00e9nergie. Ces versions de classes H et MP sont test\u00e9es et garanties pour fonctionner avec une temp\u00e9rature de jonction dans les gammes respectives, - 40\u00b0C \u00e0 150\u00b0C et \u2013 55\u00b0C \u00e0 150\u00b0C. Les applications incluent les syst\u00e8mes de l&#039;automobile, de l&#039;industrie, du domaine m\u00e9dical, de communication de donn\u00e9es et des t\u00e9l\u00e9communications.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/222211\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2011-08-06T22:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/import\/eci2236_ltc3851a-copie.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2034\" \/>\n\t<meta property=\"og:image:height\" content=\"1453\" \/>\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 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