{"id":191286,"date":"2016-11-21T02:00:00","date_gmt":"2016-11-21T02:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/convertisseur-abaisseur-elevateur-synchrone-18-v-5-a-a-haut-rendement\/"},"modified":"2016-11-21T02:00:00","modified_gmt":"2016-11-21T02:00:00","slug":"convertisseur-abaisseur-elevateur-synchrone-18-v-5-a-a-haut-rendement","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/convertisseur-abaisseur-elevateur-synchrone-18-v-5-a-a-haut-rendement\/","title":{"rendered":"Convertisseur abaisseur-\u00e9l\u00e9vateur synchrone 18 V, 5 A, \u00e0 haut rendement"},"content":{"rendered":"<p align=\"left\">La&nbsp;gamme de tensions d\u2019entr\u00e9e de 2,5 V \u00e0 18 V peut descendre jusqu\u2019\u00e0 250 mV d\u00e8s le d\u00e9marrage. Programmable de 0,8 V \u00e0 18 V, la tension de sortie est r\u00e9gul\u00e9e avec des tensions d\u2019entr\u00e9e sup\u00e9rieures, inf\u00e9rieures ou \u00e9gales \u00e0 celle de sortie.<br \/>\nS\u00e9lectionnable par l\u2019utilisateur, le fonctionnement en Burst Mode<sup> &nbsp;<\/sup>r\u00e9duit la consommation au repos \u00e0 seulement 35 \u00b5A, ce qui am\u00e9liore le rendement aux faibles charges et augmente l\u2019autonomie sur batterie. L\u2019architecture propri\u00e9taire int\u00e9gr\u00e9e, \u00e0 quatre commutateurs en mode abaisseur-\u00e9l\u00e9vateur \u00e0 modulation de largeur d\u2019impulsion (PWM), pr\u00e9sente un bas niveau de bruit, une commutation sans gigue entre les modes de fonctionnement, ce qui est appropri\u00e9 aux applications RF et analogiques de pr\u00e9cision qui sont sensibles au bruit de l\u2019alimentation.<br \/>\nLe composant comprend \u00e9galement la possibilit\u00e9 de programmer le contr\u00f4le du point de puissance maximum (MPPC), ce qui assure de g\u00e9n\u00e9rer le maximum de puissance \u00e0 partir des alimentations \u00e0 imp\u00e9dance de sortie \u00e9lev\u00e9e ou de cellules photovolta\u00efques.<\/p>\n<p align=\"left\">Les quatre MOSFET canal N int\u00e9gr\u00e9s, \u00e0 faible R<sub>DS(0N)<\/sub>, autorisent des rendements pouvant atteindre 95%. Le fonctionnement en Burst Mode peut \u00eatre d\u00e9sactiv\u00e9, ce qui procure une commutation \u00e0 un niveau de bruit continu bas. La programmation externe ou la synchronisation de la fr\u00e9quence par boucle \u00e0 verrouillage de phase (PLL) permet un fonctionnement sur la gamme \u00e9tendue de la fr\u00e9quence de commutation allant de 400 kHz \u00e0 2 MHz, ce qui offre un compromis entre le rendement et la taille de la mise en \u0153uvre.<\/p>\n<hr \/>\n<p align=\"left\">Les caract\u00e9ristiques suppl\u00e9mentaires comprennent une protection contre les courts-circuits, une protection thermique en cas de d\u00e9passement de temp\u00e9rature, une consommation \u00e0 l\u2019arr\u00eat inf\u00e9rieure \u00e0 3 \u00b5A et un indicateur de tension r\u00e9gul\u00e9e. La combinaison de petits composants externes, d\u2019une large gamme de tensions de fonctionnement, d\u2019un bo\u00eetier compact et d\u2019un faible courant de repos, fait que ce convertisseur convient aux alimentations RF, aux applications&nbsp;de forte intensit\u00e9 \u00e0 charge impulsionnelle, aux alimentations des syst\u00e8mes de sauvegarde et aux syst\u00e8mes sur batterie au plomb jusqu\u2019\u00e0 12 V.<\/p>\n<p align=\"left\">Propos\u00e9s en bo\u00eetiers QFN 28 broches, de 4 x 5 mm, et TSSOP 28 broches, \u00e0 performances thermiques renforc\u00e9es, ces composants sont sp\u00e9cifi\u00e9s pour fonctionner sur les gammes de temp\u00e9ratures de \u2013 40 \u00b0C \u00e0 +125 \u00b0C pour les classes E et I, de \u2013 40 \u00b0C \u00e0 +150 \u00b0C pour la classe H, et de \u201355 \u00b0C \u00e0 +150 \u00b0C pour la classe MP.<\/p>\n<p><a href=\"http:\/\/www.linear.com\/product\/LTC3119\" target=\"_blank\" rel=\"noopener\">www.linear.com\/product\/LTC3119<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Monolithique et \u00e0 mode courant, le convertisseur DC\/DC abaisseur-\u00e9l\u00e9vateur synchrone LTC3119 de  Linear Technology fournit un courant continu de sortie jusqu&rsquo;\u00e0 5 A en mode abaisseur, \u00e0 partir d\u2019une large gamme de sources de tension en entr\u00e9e comprenant les batteries \u00e0 un ou plusieurs \u00e9l\u00e9ments, les adaptateurs muraux non r\u00e9gul\u00e9s, ainsi que les panneaux solaires et les super-condensateurs. <\/p>\n","protected":false},"author":9,"featured_media":191287,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[909,890],"domains":[47],"ppma_author":[1141],"class_list":["post-191286","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-batteries-power-supplies-fr","tag-powermanagement-fr","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Convertisseur abaisseur-\u00e9l\u00e9vateur synchrone 18 V, 5 A, \u00e0 hau...<\/title>\n<meta name=\"description\" content=\"Monolithique et \u00e0 mode courant, le convertisseur DC\/DC abaisseur-\u00e9l\u00e9vateur synchrone LTC3119 de  Linear Technology fournit un courant continu de sortie...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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