{"id":139414,"date":"2017-11-06T23:05:44","date_gmt":"2017-11-06T23:05:44","guid":{"rendered":"https:\/\/\/gestionnaire-dalimentation-double-rail-a-rail-100v-pour-la-mesure-du-courant-et-de-la-tension\/"},"modified":"2017-11-06T23:05:44","modified_gmt":"2017-11-06T23:05:44","slug":"gestionnaire-dalimentation-double-rail-a-rail-100v-pour-la-mesure-du-courant-et-de-la-tension","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/gestionnaire-dalimentation-double-rail-a-rail-100v-pour-la-mesure-du-courant-et-de-la-tension\/","title":{"rendered":"Gestionnaire d’alimentation double, rail-\u00e0-rail, 100V, pour la mesure du courant et de la tension"},"content":{"rendered":"

Le LTC2992 pr\u00e9sente plusieurs options de tensions d\u2019alimentation, provenant d\u2019une alimentation r\u00e9gul\u00e9e de 3V \u00e0 100V, d\u2019une alimentation secondaire de 2,7V \u00e0 100V, ou du r\u00e9gulateur shunt pr\u00e9sent sur la carte. Ces options d\u2019alimentations permettent de supprimer le besoin d\u2019un r\u00e9gulateur abaisseur annexe, d\u2019un r\u00e9gulateur shunt ou d\u2019un diviseur de tension r\u00e9sistif inefficace, tout en g\u00e9rant tout rail de tension de 0V \u00e0 100V. Le LTC2992 est un circuit int\u00e9gr\u00e9, pour une solution simple qui utilise trois CAN delta-sigma et un multiplicateur pour obtenir des mesures de courant et tension sur 8 ou 12bits et des lectures de puissance sur 24bits.
\nLa large plage de fonctionnement du LTC2992 est appropri\u00e9e \u00e0 de nombreuses applications, en particulier aux \u00e9quipements des t\u00e9l\u00e9communications sous 48V, les cartes mezzanine avanc\u00e9es (AMC) et les serveurs lames. Le r\u00e9gulateur shunt de la carte procure un suppl\u00e9ment de tension pour les alimentations de plus de 100V et la gestion d\u2019alimentation n\u00e9gative. Le LTC2992 assure la mesure du courant et de la tension soit en continu ou \u00e0 la demande, calcule la puissance et stocke toutes ces informations ainsi que les valeurs minimales et maximales dans les registres accessibles via l\u2019interface I2<\/sup>C. Quatre GPIO (entr\u00e9e – sortie d\u2019usage g\u00e9n\u00e9ral) peuvent \u00eatre configur\u00e9es en entr\u00e9es de CAN pour mesurer les tensions auxiliaires voisines. Les mesures sont effectu\u00e9es avec une erreur totale non ajust\u00e9e (TUE) de seulement \u00b10,3% sur toute la plage de temp\u00e9rature. Si un param\u00e8tre d\u00e9passe les seuils programmables par l\u2019utilisateur, le LTC2992 le signale \u00e0 un registre d\u2019alerte et \u00e0 une broche par le protocole de r\u00e9ponse d\u2019alerte SMBUS. L\u2019interface I2<\/sup>C, 400kHz, procure neuf adresses de composant, une minuterie de r\u00e9initialisation de bus bloqu\u00e9 et une broche partag\u00e9e de ligne de donn\u00e9es s\u00e9rie (SDA) qui simplifie l\u2019isolement par photocoupleur de l\u2019interface I2<\/sup>C. La version LTC2992-1 pr\u00e9sente une broche de sortie de donn\u00e9e n\u00e9gative sur l\u2019interface I2<\/sup>C pour \u00eatre utilis\u00e9e dans les configurations inverseuses \u00e0 isolement par photocoupleur.
\nLes LTC2992 et LTC2992-1 sont pr\u00e9sent\u00e9s dans les plages de temp\u00e9ratures commerciales, industrielles et de l\u2019automobile, respectives de 0\u00b0C \u00e0 70\u00b0C, -40\u00b0C \u00e0 85\u00b0C et -40\u00b0C \u00e0 125\u00b0C. Les deux versions sont disponibles, aujourd\u2019hui, dans les bo\u00eetiers DFN de 16 broches, 4mm x 3mm, et MSOP de 16 broches, conformes RoHS. <\/p>\n

www.linear.com\/products\/power_monitors<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Analog Devices, Inc, qui a acquis r\u00e9cemment Linear Technology Corporation, annonce le LTC2992, un gestionnaire de syst\u00e8me \u00e0 interface I2C qui mesure le courant, la tension et la puissance\u00a0de deux rails de tension d\u2019une large bande de 0V \u00e0 100V, sans circuit suppl\u00e9mentaire.<\/p>\n","protected":false},"author":9,"featured_media":139415,"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-139414","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Gestionnaire d'alimentation double, rail-\u00e0-rail, 100V, pour la...<\/title>\n<meta name=\"description\" content=\"Analog Devices, Inc, qui a acquis r\u00e9cemment Linear Technology Corporation, annonce le LTC2992, un 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