{"id":222763,"date":"2011-10-24T22:00:00","date_gmt":"2011-10-24T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/controleur-dc-dc-generant-des-tensions-regulees-positives-ou-negatives\/"},"modified":"2011-10-24T22:00:00","modified_gmt":"2011-10-24T22:00:00","slug":"controleur-dc-dc-generant-des-tensions-regulees-positives-ou-negatives","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-dc-dc-generant-des-tensions-regulees-positives-ou-negatives\/","title":{"rendered":"Contr\u00f4leur DC\/DC g\u00e9n\u00e9rant des tensions r\u00e9gul\u00e9es positives ou n\u00e9gatives"},"content":{"rendered":"

Le LT3759 possède deux amplificateurs d’erreur de tension à boucle de retour et deux références de tension. L’un des ensembles amplificateur-référence est destiné à la génération des tensions de sortie positives, l’autre à celle des tensions de sortie négatives, ces deux ensembles possèdent une seule broche de boucle de régulation, ce qui fait du LT3759 un contrôleur DC\/DC universel pour de nombreux types d’alimentations.
\nLe LT3759 fonctionne à partir d’une gamme de tensions d’entrée, de 1,6V à 42V, et convient aux applications industrielles, de l’automobile, médicales et des télécommunications. Avec une fréquence de fonctionnement programmable ou pouvant être synchronisée de 100kHz à 1MHz, les concepteurs ont le choix parmi une large gamme d’inductances et de condensateurs pour optimiser la taille, les performances et le coût. L’architecture de contrôle à mode courant et à fréquence fixe assure un fonctionnement stable sur une gamme étendue de tensions d’alimentation et de sortie. L’utilisation de condensateurs à diélectrique céramique permet une solution de plus petite taille. Le LT3759 pilote un MOSFET canal N externe à partir d’une alimentation régulée, interne, de 4,75V. Les caractéristiques supplémentaires incluent un démarrage progressif programmable, un seuil précis de 50mV pour la détection de courant, un blocage programmable, avec hystérésis, en cas de sous tension en entrée, un signal " puissance correcte " ainsi qu’une protection contre les surtensions et les surintensités en sortie.
\nLe LT3759 est présenté en boîtier MSOP-12, à performances thermiques renforcées, en versions sur des gammes de températures étendues et industrielles de -40°C à 125°C. La version de classe H fonctionne avec une température de jonction de -40°C à 150°C. <\/p>\n

www.linear.com\/product\/LT3759<\/a><\/p>\n

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

Linear Technology annonce le LT3759, un contr\u00f4leur DC\/DC, \u00e0 large gamme de tensions d’entr\u00e9e, pour les applications \u00e0 alimentation en modes \u00e9l\u00e9vateur, SEPIC et inverseur, pouvant g\u00e9n\u00e9rer des tensions de sortie r\u00e9gul\u00e9es positives ou n\u00e9gatives.<\/p>\n","protected":false},"author":22,"featured_media":222764,"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-222763","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Contr\u00f4leur DC\/DC g\u00e9n\u00e9rant des tensions r\u00e9gul\u00e9es positives ...<\/title>\n<meta name=\"description\" content=\"Linear Technology annonce le LT3759, un contr\u00f4leur DC\/DC, \u00e0 large gamme de tensions 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