{"id":125348,"date":"2018-04-04T22:31:44","date_gmt":"2018-04-04T22:31:44","guid":{"rendered":"https:\/\/\/controleur-de-pilote-led-faible-interference-electromagnetique\/"},"modified":"2018-04-04T22:31:44","modified_gmt":"2018-04-04T22:31:44","slug":"controleur-de-pilote-led-faible-interference-electromagnetique","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-de-pilote-led-faible-interference-electromagnetique\/","title":{"rendered":"Contr\u00f4leur de pilote LED faible interf\u00e9rence \u00e9lectromagn\u00e9tique"},"content":{"rendered":"<p>Un circuit de pilote LED se compose habituellement de deux convertisseurs de courant continu, tandis qu&rsquo;une solution Ricoh utilise une conversion de commutation unique avec une alimentation \u00e0 d\u00e9coupage avanc\u00e9e. De plus, un circuit de commutation \u00e0 z\u00e9ro volt (ZVS) \u00e0 haute r\u00e9sonance permet de travailler en haute fr\u00e9quence. Ces deux fonctionnalit\u00e9s permettent d&rsquo;utiliser des composants plus petits et moins encombrants, les applications concern\u00e9es peuvent ainsi \u00e9quiper les syst\u00e8mes d&rsquo;\u00e9clairage standard, \u00e0 la fois petits et fins. En comparaison avec les circuits standard, celui-ci peut vous faire gagner 70% d&rsquo;espace sur votre circuit et en r\u00e9duire la hauteur de 50%. Autre avantage non n\u00e9gligeable : le circuit \u00e9lectronique Ricoh \u00e9met bien moins d&rsquo;interf\u00e9rences \u00e9lectromagn\u00e9tiques que les autres.&nbsp;<\/p>\n<p>Le R1700 est un puissant contr\u00f4leur PFC dot\u00e9 d&rsquo;un circuit ZVS, qui r\u00e9duit de mani\u00e8re significative les pertes et le bruit de commutation g\u00e9n\u00e9r\u00e9s habituellement par les corrections synchrones. Son circuit PFC am\u00e9liore le rapport entre la puissance active et la puissance apparente issue d&rsquo;un courant de charge inf\u00e9rieur depuis la source d&rsquo;\u00e9nergie.<\/p>\n<p>Le niveau de luminosit\u00e9 des LED peut \u00eatre r\u00e9duit de 100% \u00e0 5% en connectant le signal de modulation de largeur d&rsquo;impulsions (PWM) \u00e0 l&rsquo;entr\u00e9e de gradation (DIM). Il est \u00e9galement possible d&rsquo;ajouter le pilote de courant constant R1580 au circuit. Ce circuit convertit un signal de modulation de largeur d&rsquo;impulsions en signal de gradation lin\u00e9aire, l&rsquo;avantage principal de cette m\u00e9thode \u00e9tant que le MOSFET (transistor \u00e0 effet de champ \u00e0 structure m\u00e9tal-oxyde-semiconducteur) du pilote LED ne commute pas en permanence, ce qui contient le courant harmonique et l&rsquo;\u00e9mission \u00e9lectromagn\u00e9tique et \u00e9vite les variations de luminosit\u00e9 des LED. La qualit\u00e9 d&rsquo;image r\u00e9sultante peut \u00eatre affect\u00e9e par un \u00e9clairage fluctuant, notamment lorsque la source lumineuse est utilis\u00e9e lors d&rsquo;enregistrements de photos ou de vid\u00e9os. Parmi les effets les plus frappants, on retrouve des zones ou des lignes d&rsquo;exposition diff\u00e9rentes sur les images. Un autre avantage du R1580 est sa large plage de modulation, faisant passer la plage standard d&rsquo;un minimum de 5% \u00e0 0,5%. La gamme de modulation \u00e9tendue garantit un excellent contr\u00f4le des param\u00e8tres de temp\u00e9ratures de couleurs, notamment pour les configurations des LED RVB.<\/p>\n<p><a href=\"http:\/\/www.e-devices.ricoh.co.jp\/en\/\">www.e-devices.ricoh.co.jp\/en\/<\/a>&nbsp;<\/p>\n<h3 class=\"title\"><a href=\"http:\/\/www.electronique-eci.com\/news\/convertisseur-de-courant-continu-avec-courant-de-repos-de-144-na\">Convertisseur de courant continu avec courant de repos de 144 nA <\/a><\/h3>\n<h3 class=\"title\"><a href=\"http:\/\/www.electronique-eci.com\/news\/regulateur-faible-consommation\">R\u00e9gulateur faible consommation <\/a><\/h3>\n<h3 class=\"title\"><a href=\"http:\/\/www.electronique-eci.com\/news\/gestionnaire-dalimentation-usb-type-c\">Gestionnaire d\u2019alimentation USB type C <\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>Ricoh Electronic Devices Co., Ltd. (Japon) a lanc\u00e9 le R1700, un contr\u00f4leur de pilote LED polyvalent. Con\u00e7u pour les applications \u00e0 \u00e9clairage LED et dot\u00e9 de nombreuses fonctionnalit\u00e9s, telles qu&rsquo;un dispositif de correction de facteur de puissance, ce contr\u00f4leur pr\u00e9sente une faible interf\u00e9rence \u00e9lectromagn\u00e9tique gr\u00e2ce \u00e0 un syst\u00e8me de commutation \u00e0 z\u00e9ro volt et de nombreux circuits de s\u00e9curit\u00e9.<\/p>\n","protected":false},"author":9,"featured_media":125349,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1141],"class_list":["post-125348","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Contr\u00f4leur de pilote LED faible interf\u00e9rence \u00e9lectromagn\u00e9ti...<\/title>\n<meta name=\"description\" content=\"Ricoh Electronic Devices Co., Ltd. (Japon) a lanc\u00e9 le R1700, un contr\u00f4leur de pilote LED polyvalent. Con\u00e7u pour les applications \u00e0 \u00e9clairage LED et...\" \/>\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\/125348\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Contr\u00f4leur de pilote LED faible interf\u00e9rence \u00e9lectromagn\u00e9tique\" \/>\n<meta property=\"og:description\" content=\"Ricoh Electronic Devices Co., Ltd. (Japon) a lanc\u00e9 le R1700, un contr\u00f4leur de pilote LED polyvalent. Con\u00e7u pour les applications \u00e0 \u00e9clairage LED et dot\u00e9 de nombreuses fonctionnalit\u00e9s, telles qu&#039;un dispositif de correction de facteur de puissance, ce contr\u00f4leur pr\u00e9sente une faible interf\u00e9rence \u00e9lectromagn\u00e9tique gr\u00e2ce \u00e0 un syst\u00e8me de commutation \u00e0 z\u00e9ro volt et de nombreux circuits de s\u00e9curit\u00e9.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/125348\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2018-04-04T22:31:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.eenewseurope.com\/wp-content\/uploads\/import\/default\/files\/sites\/default\/files\/images\/eci6280_ricoh.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" 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