{"id":48695,"date":"2020-08-04T18:31:44","date_gmt":"2020-08-04T18:31:44","guid":{"rendered":"https:\/\/\/controleurs-buck-boost-pour-les-systemes-automobiles-a-double-batterie\/"},"modified":"2020-08-04T18:31:44","modified_gmt":"2020-08-04T18:31:44","slug":"controleurs-buck-boost-pour-les-systemes-automobiles-a-double-batterie","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleurs-buck-boost-pour-les-systemes-automobiles-a-double-batterie\/","title":{"rendered":"Contr\u00f4leurs Buck\/Boost pour les syst\u00e8mes automobiles \u00e0 double batterie"},"content":{"rendered":"<p>Le&nbsp;<a href=\"https:\/\/eu.mouser.com\/new\/linear-technology\/adi-lt8228-buck-boost-controller\/%20\/h\">LT8228 d&rsquo;Analog Devices<\/a>&nbsp;est un contr\u00f4leur monophas\u00e9 qui offre une solution d&rsquo;alimentation stable pour les syst\u00e8mes \u00e0 double batterie 48 V et 12 V dans les automobiles. Dans ces configurations, le bus 12 V alimente les&nbsp;<a href=\"https:\/\/eu.mouser.com\/applications\/lighting%20\/h\">syst\u00e8mes d&rsquo;\u00e9clairage<\/a>, d&rsquo;info-divertissement et de l&rsquo;<a href=\"https:\/\/eu.mouser.com\/applications\/audio_applications%20\/h\">audio<\/a>, tandis que le bus 48 V g\u00e8re les syst\u00e8mes actifs du ch\u00e2ssis, les compresseurs de climatisation et autres syst\u00e8mes de puissance. Le composant est un contr\u00f4leur synchrone de type buck (abaisseur) ou boost (\u00e9l\u00e9vateur) de tension constante \u00e0 100 V ou de courant constant, dans lequel le sens du flux de puissance est soit d\u00e9termin\u00e9 automatiquement par le LT8228 lui-m\u00eame, soit contr\u00f4l\u00e9 de mani\u00e8re externe. Le dispositif comporte des MOSFET de protection en entr\u00e9e et en sortie pour contr\u00f4ler les courants d&rsquo;appel, prot\u00e9ger contre les tensions n\u00e9gatives et assurer l&rsquo;isolation des bornes en cas de d\u00e9faillance. Ce contr\u00f4leur est \u00e9galement une solution id\u00e9ale pour les syst\u00e8mes de protection contre les coupures de courant, la sauvegarde et la stabilisation des syst\u00e8mes \u00e0 haute puissance et les&nbsp;<a href=\"https:\/\/eu.mouser.com\/applications\/power-supply-technology%20\/h\">alimentations<\/a>&nbsp;redondantes \u00e0 haute fiabilit\u00e9 de type \u00ab&nbsp;N+1&nbsp;\u00bb.<\/p>\n<p>&nbsp;<\/p>\n<p>Le&nbsp;<a href=\"https:\/\/eu.mouser.com\/new\/linear-technology\/adi-ltc7871-buck-boost-controllers\/%20\/h\">LTC7871<\/a>&nbsp;est un contr\u00f4leur bidirectionnel de r\u00e9gulation de la commutation \u00e0 six phases qui fonctionne \u00e0 la demande en mode buck (abaisseur) ou boost (\u00e9l\u00e9vateur) via un signal de commande, ce qui le rend \u00e9galement id\u00e9al pour les syst\u00e8mes automobiles \u00e0 double batterie de 48 V et 12 V. Le LTC7871 permet aux deux batteries de fournir simultan\u00e9ment de l&rsquo;\u00e9nergie \u00e0 la charge en amenant indiff\u00e9remment la puissance d&rsquo;une batterie ou de l&rsquo;autre. Son architecture exclusive en mode courant \u00e0 fr\u00e9quence constante am\u00e9liore le rapport signal\/bruit, permettant un fonctionnement \u00e0 faible bruit et offrant une excellente adaptation du courant entre les phases. Comme caract\u00e9ristiques suppl\u00e9mentaires, on trouve une interface s\u00e9rie conforme \u00e0 SPI, un mode de fonctionnement discontinu ou continu, des contr\u00f4leurs de surtension et de sous-tension, une compensation de boucle ind\u00e9pendante pour le fonctionnement buck ou boost, une surveillance pr\u00e9cise du courant d&rsquo;inductance et une protection contre les surintensit\u00e9s.<\/p>\n<p>Pour des \u00e9valuations, Mouser stocke \u00e9galement le circuit de d\u00e9monstration&nbsp;<a href=\"https:\/\/eu.mouser.com\/new\/analog-devices\/adi-dc2351a-demonstration-circuit\/%20\/h\">DC2351A<\/a>&nbsp;pour le Analog Devices LT8228, con\u00e7u pour d\u00e9livrer de 36V \u00e0 54V d&rsquo;un c\u00f4t\u00e9 et de 8V \u00e0 14V de l&rsquo;autre c\u00f4t\u00e9. Ce circuit peut fournir un courant de sortie maximum de 35 A en mode buck tout en assurant 7 A de courant en mode boost. Le circuit de d\u00e9monstration DC2351A peut \u00eatre mis en parall\u00e8le avec d&rsquo;autres cartes DC2351A, ce qui permet d&rsquo;augmenter le courant de sortie tout en gardant un d\u00e9bit d&rsquo;air ou une dissipation thermique ad\u00e9quats.<\/p>\n<p><a href=\"https:\/\/eu.mouser.com\/new\/linear-technology\/adi-lt8228-buck-boost-controller\/%20\/h\">eu.mouser.com\/new\/linear-technology\/adi-lt8228-buck-boost-controller\/<\/a><\/p>\n<p><a href=\"https:\/\/eu.mouser.com\/new\/linear-technology\/adi-ltc7871-buck-boost-controllers\/%20\/h\">eu.mouser.com\/new\/linear-technology\/adi-ltc7871-buck-boost-controllers\/<\/a><\/p>\n<p><a href=\"https:\/\/eu.mouser.com\/\">www.mouser.fr.<\/a><\/p>\n<p><a href=\"http:\/\/www.analog.com \\h\">www.analog.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mouser Electronics Inc. stocke maintenant les contr\u00f4leurs buck\/boost bidirectionnels LT8228 et LTC7871 d&rsquo;Analog Devices, Inc. Offrant une r\u00e9gulation bidirectionnelle de la tension ou du courant et une protection bidirectionnelle contre les inversions de courant, les contr\u00f4leurs LT8228 et LTC7871 constituent une solution d&rsquo;alimentation simple et fiable pour les syst\u00e8mes automobiles et industriels \u00e0 double batterie.<\/p>\n","protected":false},"author":9,"featured_media":48696,"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-48695","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Contr\u00f4leurs Buck\/Boost pour les syst\u00e8mes automobiles \u00e0 doubl...<\/title>\n<meta name=\"description\" content=\"Mouser Electronics Inc. stocke maintenant les contr\u00f4leurs buck\/boost bidirectionnels LT8228 et LTC7871 d&#039;Analog Devices, Inc. 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Offrant une r\u00e9gulation bidirectionnelle de la tension ou du courant et une protection bidirectionnelle contre les inversions de courant, les contr\u00f4leurs LT8228 et LTC7871 constituent une solution d&#039;alimentation simple et fiable pour les syst\u00e8mes automobiles et industriels \u00e0 double batterie.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/48695\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2020-08-04T18:31:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/sites\/default\/files\/images\/eci8749_mouser_adi.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"689\" \/>\n\t<meta property=\"og:image:height\" content=\"576\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Alain Dieul\" \/>\n<meta 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