{"id":501497,"date":"2026-11-06T10:00:37","date_gmt":"2026-11-06T09:00:37","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=501497"},"modified":"2026-11-05T17:27:47","modified_gmt":"2026-11-05T16:27:47","slug":"adc34dso75-ti-surveille-lalimentation-ia-a-la-nanoseconde","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/adc34dso75-ti-surveille-lalimentation-ia-a-la-nanoseconde\/","title":{"rendered":"ADC34DSO75 : TI surveille l\u2019alimentation IA \u00e0 la nanoseconde"},"content":{"rendered":"<p>Avec la croissance des charges de travail d\u2019IA, les op\u00e9rateurs de centres de donn\u00e9es font face \u00e0 l\u2019instabilit\u00e9 de l\u2019alimentation, \u00e0 une surveillance temps r\u00e9el insuffisante et \u00e0 la d\u00e9gradation du signal, autant de sources de temps d\u2019arr\u00eat co\u00fbteux. Lors de l\u2019Open Compute Project (OCP) Global Summit, \u00e0 San Jos\u00e9, Texas Instruments a pr\u00e9sent\u00e9 l\u2019ADC34DSO75, un convertisseur analogique-num\u00e9rique d\u00e9di\u00e9 \u00e0 la surveillance \u00e0 distance, bas\u00e9e sur les \u00e9v\u00e9nements, avec une r\u00e9solution de l\u2019ordre de la nanoseconde. Deux autres composants l\u2019accompagnent : le contr\u00f4leur isol\u00e9 LMI800PS pour les bus 800 V et l\u2019oscillateur BAW LMK6B.<\/p>\n<h3>ADC34DSO75 : une t\u00e9l\u00e9m\u00e9trie \u00e9v\u00e9nementielle \u00e0 3 Gsps<\/h3>\n<p>L\u2019ADC34DSO75 \u00e9chantillonne \u00e0 3 Gsps et assure une surveillance continue, 24 h\/24, \u00e0 faible consommation, des perturbations sur les lignes d\u2019alimentation. Selon TI, sa r\u00e9solution temporelle est des milliers de fois plus fine que celle des solutions actuelles, qui ne d\u00e9tectent souvent pas les perturbations de l\u2019ordre de la nanoseconde \u00e0 l\u2019origine d\u2019arr\u00eats impr\u00e9vus.<\/p>\n<p>La combinaison d\u2019un \u00e9chantillonnage tr\u00e8s rapide et d\u2019un traitement num\u00e9rique du signal int\u00e9gr\u00e9 permet de d\u00e9tecter et d\u2019enregistrer en temps r\u00e9el les d\u00e9fauts transitoires sur les bus basse tension \u00e0 fort courant. Le composant autorise ainsi une t\u00e9l\u00e9m\u00e9trie enti\u00e8rement \u00e0 distance, sans d\u00e9bogage sur site ni oscilloscope, pour un encombrement et un co\u00fbt inf\u00e9rieurs aux m\u00e9thodes de surveillance traditionnelles. Le fabricant rappelle que le co\u00fbt d\u2019un arr\u00eat peut atteindre plusieurs centaines de milliers de dollars par heure.<\/p>\n<h3>LMI800PS : un contr\u00f4leur hot-swap isol\u00e9 pour les bus 800 V<\/h3>\n<p>Pr\u00e9sent\u00e9 comme le premier contr\u00f4leur isol\u00e9 de remplacement \u00e0 chaud de 800 V, le LMI800PS remplace une solution discr\u00e8te \u00e0 cinq circuits int\u00e9gr\u00e9s par un seul bo\u00eetier. Il assure la protection contre les courants d\u2019appel et int\u00e8gre une alimentation de polarisation isol\u00e9e ainsi que la t\u00e9l\u00e9m\u00e9trie PMBus, ce qui r\u00e9duit de plus de 60 % la surface occup\u00e9e sur la carte.<\/p>\n<p>Son isolation renforc\u00e9e de 5 kVrms et une ligne de fuite sup\u00e9rieure \u00e0 8 mm r\u00e9pondent aux exigences de s\u00e9curit\u00e9. En cas de d\u00e9faut sur une charge, celle-ci est isol\u00e9e rapidement sans perturber le bus partag\u00e9. Compatible avec les distributions en \u00b1400 V et 800 V, le composant s\u2019adapte \u00e0 diff\u00e9rentes architectures de racks.<\/p>\n<h3>LMK6B : un oscillateur BAW \u00e0 tr\u00e8s faible gigue<\/h3>\n<p>\u00c0 mesure que les d\u00e9bits des centres de donn\u00e9es approchent 3,2 Tbps, la marge de synchronisation se r\u00e9duit et une gigue minime peut d\u00e9grader le taux d\u2019erreur binaire. L\u2019oscillateur \u00e0 ondes acoustiques de volume LMK6B affiche une gigue de 9,6 fs \u00e0 625 MHz et, selon TI, un taux de r\u00e9jection de l\u2019alimentation (PSRR) parmi les meilleurs de sa cat\u00e9gorie.<\/p>\n<p>Le composant vise les infrastructures r\u00e9seau des centres de donn\u00e9es d\u2019IA, o\u00f9 la pr\u00e9servation de l\u2019int\u00e9grit\u00e9 du signal conditionne la stabilit\u00e9 du syst\u00e8me.<\/p>\n<h3>D\u00e9monstrations et conf\u00e9rence \u00e0 l\u2019OCP<\/h3>\n<p>Les trois composants sont pr\u00e9sent\u00e9s sur le stand E45 de TI pendant le salon. Karthik Vasanth, vice-pr\u00e9sident et directeur g\u00e9n\u00e9ral de la division Donn\u00e9es, convertisseurs et horloges, place ces annonces sous l\u2019angle du besoin de visibilit\u00e9 en temps r\u00e9el et de stabilit\u00e9 architecturale qu\u2019imposent les charges d\u2019IA.<\/p>\n<p>David Reusch, ing\u00e9nieur en \u00e9lectronique de puissance chez TI, consacre par ailleurs une conf\u00e9rence aux consid\u00e9rations de conception des convertisseurs CC\/CC pour les centres de donn\u00e9es en architecture 800 VCC, avec une comparaison des topologies et de leurs compromis.<\/p>\n<p><em>Pour les \u00e9quipes qui con\u00e7oivent l\u2019alimentation et la supervision des racks d\u2019IA, ces trois composants couvrent la d\u00e9tection des transitoires, la protection des bus haute tension et la synchronisation. Si vos architectures \u00e9voluent vers le 800 V, l\u2019ADC34DSO75 et le LMI800PS m\u00e9ritent une \u00e9valuation conjointe.<\/em><\/p>\n<p><a href=\"https:\/\/www.ti.com\/ocp\">Texas Instruments<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avec la croissance des charges de travail d\u2019IA, les op\u00e9rateurs de centres de donn\u00e9es font face \u00e0 l\u2019instabilit\u00e9 de l\u2019alimentation, \u00e0 une surveillance temps r\u00e9el insuffisante et \u00e0 la d\u00e9gradation du signal, autant de sources de temps d\u2019arr\u00eat co\u00fbteux. Lors de l\u2019Open Compute Project (OCP) Global Summit, \u00e0 San Jos\u00e9, Texas Instruments a pr\u00e9sent\u00e9 l\u2019ADC34DSO75, [&hellip;]<\/p>\n","protected":false},"author":39,"featured_media":501500,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_ppma_block_editor_authors":""},"categories":[881],"tags":[11973,12288,12286,12290,12289,12287],"domains":[47],"ppma_author":[6113],"class_list":["post-501497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-centres-de-donnees-ia","tag-controleur-hot-swap-800-v","tag-convertisseur-analogique-numerique","tag-ocp-global-summit","tag-oscillateur-baw","tag-telemetrie-nanoseconde","domains-electronique-eci"],"acf":[],"yoast_head":"<title>ADC34DSO75 : TI surveille l\u2019alimentation IA \u00e0 la nanoseconde ...<\/title>\n<meta name=\"description\" content=\"Texas Instruments 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