{"id":209995,"date":"2016-05-27T06:00:00","date_gmt":"2016-05-27T06:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/regulateur-flyback-monolithique-isole-sans-photocoupleur\/"},"modified":"2016-05-27T06:00:00","modified_gmt":"2016-05-27T06:00:00","slug":"regulateur-flyback-monolithique-isole-sans-photocoupleur","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/regulateur-flyback-monolithique-isole-sans-photocoupleur\/","title":{"rendered":"R\u00e9gulateur flyback monolithique isol\u00e9 sans photocoupleur"},"content":{"rendered":"<p>Fonctionnant sur une gamme de tensions d\u2019entr\u00e9e de 3 V \u00e0 100 V, ce r\u00e9gulateur utilise un transistor de puissance DMOS de 2 A\/150 V et peut fournir une puissance de sortie jusqu\u2019\u00e0 24 W, ce qui le rend appropri\u00e9 \u00e0 une grande vari\u00e9t\u00e9 d\u2019applications de transmission de donn\u00e9es, de l\u2019automobile, industrielles, m\u00e9dicales et militaires.<\/p>\n<p align=\"left\">Il travaille en mode&nbsp;de conduction critique (boundary mode) qui consiste en un contr\u00f4le en mode courant, \u00e0 d\u00e9coupage et \u00e0 fr\u00e9quence variable, assurant une r\u00e9gulation \u00e0 \u00b1&nbsp;5% typique de la tension de sortie, en fonction des variations de la tension d\u2019entr\u00e9e, de la charge et de la temp\u00e9rature. Ce fonctionnement en mode critique permet l\u2019emploi d\u2019un transformateur plus petit que ceux employ\u00e9s dans les conceptions \u00e0 mode de conduction continue \u00e9quivalentes.<\/p>\n<p align=\"left\">La tension de sortie est facilement fix\u00e9e \u00e0 l\u2019aide de deux r\u00e9sistances externes et du rapport du transformateur.&nbsp; Plusieurs transformateurs standard, mentionn\u00e9s dans la fiche de caract\u00e9ristiques, peuvent \u00eatre utilis\u00e9s dans de nombreuses applications. Le haut degr\u00e9 d\u2019int\u00e9gration et l\u2019emploi du fonctionnement en Burst Mode \u00e0 faible ondulation conduisent \u00e0 un produit d\u2019utilisation simple, avec peu de composants, et de haut rendement pour les alimentations isol\u00e9es.<\/p>\n<p align=\"left\">Les caract\u00e9ristiques additionnelles comprennent&nbsp;une protection contre les courts-circuits, un courant de repos \u00e0 vide de 116 \u00b5A, une tension de validation pr\u00e9cise et un arr\u00eat avec hyst\u00e9r\u00e9sis en cas de sous-tension. Elles incluent \u00e9galement un d\u00e9marrage progressif et une compensation interne, ainsi qu\u2019une compensation de la tension de sortie en fonction de la temp\u00e9rature de la diode.&nbsp;<\/p>\n<p>Encapsul\u00e9 en petit bo\u00eetier SO-8 \u00e0 performances thermiques renforc\u00e9es, ce circuit est propos\u00e9 en versions de classes industrielle et \u00e0 gamme de temp\u00e9rature \u00e9tendue fonctionnant avec une temp\u00e9rature de jonction de -40 \u00b0C \u00e0 +125 \u00b0C.<\/p>\n<p><a href=\"http:\/\/www.linear.com\/product\/LT8304\" target=\"_blank\" rel=\"noopener\">www.linear.com\/product\/LT8304<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En \u00e9chantillonnant la tension de sortie isol\u00e9e directement \u00e0 partir de la tension du primaire, le r\u00e9gulateur flyback monolithique LT8304 de Linear Technology ne n\u00e9cessite pas de photocoupleur ni d\u2019un troisi\u00e8me enroulement pour la r\u00e9gulation, ce qui simplifie de fa\u00e7on significative la conception des convertisseurs DC\/DC isol\u00e9s.<\/p>\n","protected":false},"author":9,"featured_media":209996,"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-209995","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>R\u00e9gulateur flyback monolithique isol\u00e9 sans photocoupleur ...<\/title>\n<meta name=\"description\" content=\"En \u00e9chantillonnant la tension de sortie isol\u00e9e directement \u00e0 partir de la tension du primaire, le r\u00e9gulateur flyback monolithique LT8304 de Linear...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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