{"id":501125,"date":"2026-10-27T10:00:53","date_gmt":"2026-10-27T09:00:53","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=501125"},"modified":"2026-10-23T17:47:00","modified_gmt":"2026-10-23T15:47:00","slug":"alimentation-800-v-dc-microchip-et-navitas-visent-lia","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/alimentation-800-v-dc-microchip-et-navitas-visent-lia\/","title":{"rendered":"Alimentation 800 V DC : Microchip et Navitas visent l\u2019IA"},"content":{"rendered":"<p>Pour alimenter des grappes de GPU de plus en plus puissantes, les centres de donn\u00e9es d\u2019IA s\u2019orientent vers des architectures 800 V DC au niveau du rack, afin d\u2019am\u00e9liorer le rendement de distribution, d\u2019augmenter la densit\u00e9 de puissance et de pr\u00e9parer les serveurs de nouvelle g\u00e9n\u00e9ration. Microchip Technology et Navitas Semiconductor ont d\u00e9velopp\u00e9 ensemble un syst\u00e8me de r\u00e9f\u00e9rence de conversion 800 V DC vers 6 V DC destin\u00e9 \u00e0 ces racks. Conforme \u00e0 la norme 800 V DC de l\u2019Open Compute Project (OCP), la plateforme est livr\u00e9e avec mat\u00e9riel de r\u00e9f\u00e9rence, logiciels et documentation.<\/p>\n<h3>Contr\u00f4le num\u00e9rique dsPIC33AK et GaN de Navitas<\/h3>\n<p>La plateforme associe les contr\u00f4leurs de signal num\u00e9rique dsPIC33AK et le circuit de s\u00e9curit\u00e9 CryptoAuthentication TA100 de Microchip aux FET GaNFast de Navitas. Le dsPIC33AK assure un contr\u00f4le num\u00e9rique d\u00e9terministe pour une conversion DC\/DC haute fr\u00e9quence \u00e0 haut rendement.<\/p>\n<p>La famille dsPIC33AK256MPS306 dispose d\u2019un c\u0153ur 32 bits \u00e0 200 MHz avec FPU double pr\u00e9cision, de PWM haute r\u00e9solution de 78 ps et de plusieurs ADC 12 bits jusqu\u2019\u00e0 40 M\u00e9ch\/s. Les composants int\u00e8grent une biblioth\u00e8que d\u2019algorithmes cryptographiques post-quantiques recommand\u00e9s par la suite CNSA 2.0, ainsi qu\u2019un chiffrement mat\u00e9riel acc\u00e9l\u00e9r\u00e9.<\/p>\n<h3>96 % de rendement vis\u00e9 et 128 W\/cm\u00b3<\/h3>\n<p>La carte de distribution de puissance (PDB) utilise 16 FET GaNFast NV6034 de 650 V et 17 m\u03a9, en topologie demi-pont empil\u00e9 c\u00f4t\u00e9 primaire. Le bo\u00eetier DFN 8 \u00d7 8 \u00e0 refroidissement double face r\u00e9duit la r\u00e9sistance thermique et autorise une puissance continue plus \u00e9lev\u00e9e. La carte vise un rendement maximal de 96 % \u00e0 pleine charge, \u00e0 1 MHz de fr\u00e9quence de commutation, avec une densit\u00e9 de puissance de 128 W\/cm\u00b3 (2 100 W\/in\u00b3).<\/p>\n<p>Environ 20 % plus mince qu\u2019un t\u00e9l\u00e9phone portable, son profil permet une int\u00e9gration au plus pr\u00e8s de la carte GPU, au b\u00e9n\u00e9fice des performances transitoires et du rendement de distribution.<\/p>\n<h3>Une conversion directe en un seul \u00e9tage<\/h3>\n<p>La conversion directe de 800 V DC \u00e0 6 V DC regroupe en un seul convertisseur les \u00e9tapes habituelles de 800 V vers 50 V puis de 50 V vers 6 V, pour un meilleur rendement de bout en bout. Pour Joe Thomsen, vice-pr\u00e9sident du d\u00e9partement des contr\u00f4leurs de signal num\u00e9rique de Microchip, les d\u00e9veloppeurs ont besoin de solutions de contr\u00f4le et de s\u00e9curit\u00e9 \u00e9prouv\u00e9es pour r\u00e9duire les risques de mise en \u0153uvre de ces nouvelles architectures.<\/p>\n<p>Vipin Bothra, vice-pr\u00e9sident marketing des solutions mondiales chez Navitas, voit dans le GaN un levier de densit\u00e9 de puissance, de rendement et de performances syst\u00e8me pour les centres de donn\u00e9es IA.<\/p>\n<h3>Une racine de confiance mat\u00e9rielle avec le TA100<\/h3>\n<p>Le TA100 \u00e9tablit une racine de confiance mat\u00e9rielle sans impl\u00e9mentation \u00e0 partir de z\u00e9ro. Il prend en charge l\u2019authentification du code, le d\u00e9marrage s\u00e9curis\u00e9, la g\u00e9n\u00e9ration de codes MAC, les mises \u00e0 jour s\u00e9curis\u00e9es du firmware, plusieurs protocoles et fonctions de gestion des cl\u00e9s, ainsi que TLS.<\/p>\n<p>Le syst\u00e8me de r\u00e9f\u00e9rence est pr\u00e9sent\u00e9 au sommet mondial OCP 2026, du 12 au 15 octobre \u00e0 San Jos\u00e9, en Californie.<\/p>\n<p><em>Pour vous qui d\u00e9veloppez des alimentations de rack pour l\u2019IA, ce syst\u00e8me de r\u00e9f\u00e9rence fournit une base 800 V DC vers 6 V DC d\u00e9j\u00e0 int\u00e9gr\u00e9e, du contr\u00f4le num\u00e9rique \u00e0 la racine de confiance. La conversion en un seul \u00e9tage m\u00e9rite d\u2019\u00eatre compar\u00e9e \u00e0 votre cha\u00eene actuelle en deux \u00e9tages.<\/em><\/p>\n<p><a href=\"https:\/\/www.microchip.com\">Microchip Technology<\/a> | <a href=\"https:\/\/navitassemi.com\">Navitas Semiconductor<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pour alimenter des grappes de GPU de plus en plus puissantes, les centres de donn\u00e9es d\u2019IA s\u2019orientent vers des architectures 800 V DC au niveau du rack, afin d\u2019am\u00e9liorer le rendement de distribution, d\u2019augmenter la densit\u00e9 de puissance et de pr\u00e9parer les serveurs de nouvelle g\u00e9n\u00e9ration. Microchip Technology et Navitas Semiconductor ont d\u00e9velopp\u00e9 ensemble un [&hellip;]<\/p>\n","protected":false},"author":39,"featured_media":501128,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_ppma_block_editor_authors":""},"categories":[881],"tags":[12124,11973,12126,3897,6697,12128,12127,12125],"domains":[47],"ppma_author":[6113],"class_list":["post-501125","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-alimentation-800-v-dc","tag-centres-de-donnees-ia","tag-conversion-800-v-vers-6-v","tag-gan-fr-2","tag-nitrure-de-gallium","tag-open-compute-project-fr","tag-rack-ocp","tag-ta100-cryptoauthentication","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Alimentation 800 V DC : Microchip et Navitas visent l\u2019IA ...<\/title>\n<meta name=\"description\" content=\"Microchip et Navitas pr\u00e9sentent un 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