{"id":103452,"date":"2018-11-13T23:05:44","date_gmt":"2018-11-13T23:05:44","guid":{"rendered":"https:\/\/\/drivers-demi-ponts-100v-certifies-automobile\/"},"modified":"2018-11-13T23:05:44","modified_gmt":"2018-11-13T23:05:44","slug":"drivers-demi-ponts-100v-certifies-automobile","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/drivers-demi-ponts-100v-certifies-automobile\/","title":{"rendered":"Drivers demi-ponts 100V certifi\u00e9s automobile"},"content":{"rendered":"

 Le circuit ISL784x4 pilote demi-pont MOSFET canal N compl\u00e8te le contr\u00f4leur bidirectionnel \u00e0 4 phases ISL78224, lui permettant de fournir une puissance pouvant atteindre 3 kW avec un rendement sup\u00e9rieur \u00e0 95% dans les convertisseurs 12V-48V utilis\u00e9s dans les v\u00e9hicules \u00e0 hybridation l\u00e9g\u00e8re. Les pilotes ISL784x4 sont \u00e9galement bien adapt\u00e9s aux convertisseurs DC\/DC bidirectionnels 12V-24V, ainsi qu\u2019\u00e0 d\u2019autres applications abaisseurs ou \u00e9l\u00e9vateurs \u00e0 fort courant.<\/p>\n

Les drivers du ISL784x4 simplifient la gestion des MOSFET \u00e0 fort courant en proposant des broches ind\u00e9pendantes de pilotage pour les grilles des MOSFET haut et bas. Les concepteurs peuvent ainsi facilement int\u00e9grer des r\u00e9sistances de grille externes pour r\u00e9gler la vitesse de mont\u00e9e des transitions montantes et descendantes du commutateur DC\/DC, r\u00e9duisant ainsi les interf\u00e9rences \u00e9lectromagn\u00e9tiques (EMI). L\u2019ISL784x4 fournit \u00e9galement un contr\u00f4le adaptatif du temps mort pour assurer des op\u00e9rations de commutation pr\u00e9cises avec ouverture avant fermeture qui emp\u00eachent le courant de court-circuit de se produire si la commutation simultan\u00e9e des deux commutateurs convertisseur DC\/DC \u00e9tait autoris\u00e9e. De plus, la fonction temps mort adaptatif de l\u2019ISL78424 et de l\u2019ISL78434 peut d\u00e9tecter le niveau de la grille des MOSFET, \u00e9liminant ainsi les erreurs potentielles introduites par les chutes de tension aux bornes des r\u00e9sistances de grille externes qui contr\u00f4lent la vitesse des fronts du n\u0153ud de commutation.<\/p>\n

Les drivers ISL784x4 conviennent parfaitement aux applications DC\/DC \u00e0 fort courant, telles que les convertisseurs 12-48V pour les v\u00e9hicules hybrides 48V l\u00e9gers. Ils am\u00e9liorent l’efficacit\u00e9 en permettant d\u2019avoir un variateur de vitesse robuste avec un courant de cr\u00eate fourni de 3 A et un courant de cr\u00eate tir\u00e9 de 4 A. Un pilotage de grille puissant leur permet de faire commuter rapidement les MOSFET \u00e0 fort courant ayant une capacit\u00e9 de grille \u00e9lev\u00e9e, ce qui r\u00e9duit les pertes de commutation. Le contr\u00f4le du temps mort adaptatif des pilotes MOSFET en demi-pont limite les temps morts excessifs afin de r\u00e9duire les pertes de conduction pour augmenter encore l\u2019efficacit\u00e9 de la conversion DC\/DC. De plus, les drivers ISL784x4 offrent des tensions nominales id\u00e9ales pour les syst\u00e8mes automobiles 48V avec un n\u0153ud de commutation tol\u00e9rant 70V continus et jusqu’\u00e0 86V pour les transitoires. De m\u00eame, le pilote du transistor haut peut tol\u00e9rer une tension continue de 86 V et jusqu\u2019\u00e0 100 V pendant les transitoires.<\/p>\n

www.renesas.com\/products\/isl78424<\/a><\/p>\n

www.renesas.com\/products\/isl78434<\/a><\/p>\n

www.renesas.com\/products\/isl78444<\/a><\/p>\n

Graphique 3D haut de gamme pour les grands \u00e9crans des tableaux de bord<\/a><\/h3>\n

Microprocesseur pour le traitement \u00e0 grande vitesse d’imagerie <\/a><\/h3>\n

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

Renesas Electronics Corporation propose une nouvelle famille de drivers MOSFET pour demi-ponts canal-N 100V 4A certifi\u00e9s automobile. La famille ISL784x4 comprend trois composants : l’ISL78424 et l’ISL78444 avec une entr\u00e9e PWM \u00e0 trois niveaux pour contr\u00f4ler les deux pilotes de grille, et l’ISL78434, qui dispose de deux entr\u00e9es ind\u00e9pendantes qui contr\u00f4lent s\u00e9par\u00e9ment les drivers haut et bas.<\/p>\n","protected":false},"author":9,"featured_media":103453,"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-103452","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Drivers demi-ponts 100V certifi\u00e9s automobile ...<\/title>\n<meta name=\"description\" content=\"Renesas Electronics Corporation propose une nouvelle famille de drivers MOSFET pour demi-ponts canal-N 100V 4A certifi\u00e9s automobile. 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La famille ISL784x4 comprend trois composants : l'ISL78424 et l'ISL78444 avec une entr\u00e9e PWM \u00e0 trois niveaux pour contr\u00f4ler les deux pilotes de grille, et l'ISL78434, qui dispose de deux entr\u00e9es ind\u00e9pendantes qui contr\u00f4lent s\u00e9par\u00e9ment les drivers haut et bas.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/103452\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2018-11-13T23:05:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/sites\/default\/files\/images\/eci6706_renesas.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1800\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Alain Dieul\" \/>\n<meta name=\"twitter:card\" 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