{"id":232992,"date":"2015-04-29T22:00:00","date_gmt":"2015-04-29T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/controleur-hot-swap-20-a-integrant-mosfet-et-detection-de-courant\/"},"modified":"2015-04-29T22:00:00","modified_gmt":"2015-04-29T22:00:00","slug":"controleur-hot-swap-20-a-integrant-mosfet-et-detection-de-courant","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-hot-swap-20-a-integrant-mosfet-et-detection-de-courant\/","title":{"rendered":"Contr\u00f4leur Hot Swap 20 A, int\u00e9grant MOSFET et d\u00e9tection de courant"},"content":{"rendered":"<p>Ce circuit assure, en toute s&eacute;curit&eacute;, l&rsquo;insertion et le retrait &agrave; chaud d&rsquo;une carte sur des fonds de panier de 2,9 V &agrave; 15 V, en contr&ocirc;lant le MOSFET canal N int&eacute;gr&eacute; pour alimenter progressivement les condensateurs de fortes capacit&eacute;s, &eacute;vitant ainsi les &eacute;tincelles, la d&eacute;t&eacute;rioration des connecteurs et les dysfonctionnements du syst&egrave;me. En int&eacute;grant les deux composants Hot Swap les plus critiques et les plus volumineux que sont le MOSFET de puissance et la r&eacute;sistance de d&eacute;tection d&rsquo;intensit&eacute;, ce dispositif r&eacute;duit le temps de conception et &eacute;conomise une surface pr&eacute;cieuse de carte.<br \/>\nTest&eacute;e en production, l&rsquo;aire de s&eacute;curit&eacute; (SOA) est sp&eacute;cifi&eacute;e pour assurer une insertion &agrave; chaud robuste, sp&eacute;cialement pour les cartes &agrave; espace r&eacute;duit comme celles des serveurs, des routeurs et des commutateurs de r&eacute;seaux, des dispositifs industriels et des pilotes &agrave; &eacute;tat solide.<br \/>\nApr&egrave;s insertion, le contr&ocirc;leur attend la fin du rebond de connexion pour d&eacute;marrer progressivement la sortie. Un signal r&eacute;f&eacute;renc&eacute; &agrave; la masse, proportionnel &agrave; l&rsquo;intensit&eacute; de courant dans la charge, est g&eacute;n&eacute;r&eacute; pour g&eacute;rer un convertisseur analogique num&eacute;rique (CAN). La limite du courant peut &ecirc;tre r&eacute;duite en dessous de sa valeur par d&eacute;faut de 22,5 A par une seule r&eacute;sistance, ce qui offre un r&eacute;glage rapide pour des variations de charge dynamique et des applications vari&eacute;es. Pour des applications de plus forte intensit&eacute;, deux contr&ocirc;leurs peuvent facilement &ecirc;tre mis en parall&egrave;le pour une solution &agrave; 40 A.\n<\/p>\n<hr \/>\n<p>Lors de surintensit&eacute;s, le circuit limite la dissipation du MOSFET par repliement de sa caract&eacute;ristique de courant limite en ajustant la dur&eacute;e de temps mort. Les seuils de sous-tension et de surtension prot&egrave;gent les charges en aval contre les tensions pr&eacute;sentes en dehors d&rsquo;une fen&ecirc;tre valide de tensions, emp&ecirc;chant un mauvais fonctionnement et des d&eacute;g&acirc;ts sur le circuit.<br \/>\nPr&eacute;sent&eacute; en bo&icirc;tier QFN 38 broches, de 5 x 9 mm, ce contr&ocirc;leur Hot Swap est sp&eacute;cifi&eacute; sur les classes de temp&eacute;ratures commerciales de 0 &deg;C &agrave; 70 &deg;C, industrielles de &#8209;40 &deg;C &agrave; +85 &deg;C et de l&rsquo;automobile de -40 &deg;C &agrave; +125 &deg;C.<\/p>\n<\/p>\n<p><a title=\"www.linear.com\/product\/LTC4234\" target=\"_blank\" href=\"http:\/\/www.linear.com\/product\/ltc4234\" rel=\"noopener\">www.linear.com\/product\/LTC4234<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Encapsul\u00e9 en bo\u00eetier compact QFN, le contr\u00f4leur Hot Swap 20 A LTC4234 de Linear Technology int\u00e8gre un MOSFET de puissance et une mesure de courant afin de fournir une solution d\u2019insertion \u00e0 chaud robuste et de petite empreinte pour les cartes \u00e0 forte densit\u00e9 de circuits.<\/p>\n","protected":false},"author":22,"featured_media":232993,"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-232992","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Contr\u00f4leur Hot Swap 20 A, int\u00e9grant MOSFET et d\u00e9tection de c...<\/title>\n<meta name=\"description\" content=\"Encapsul\u00e9 en bo\u00eetier compact QFN, le contr\u00f4leur Hot Swap 20 A LTC4234 de Linear Technology int\u00e8gre un MOSFET de puissance et une mesure de courant afin...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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