{"id":116438,"date":"2018-07-02T22:31:44","date_gmt":"2018-07-02T22:31:44","guid":{"rendered":"https:\/\/\/controleur-pse-poe-a-4-ports-isoles-pouvant-generer-jusqua-713w\/"},"modified":"2018-07-02T22:31:44","modified_gmt":"2018-07-02T22:31:44","slug":"controleur-pse-poe-a-4-ports-isoles-pouvant-generer-jusqua-713w","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/controleur-pse-poe-a-4-ports-isoles-pouvant-generer-jusqua-713w\/","title":{"rendered":"Contr\u00f4leur PSE PoE++, \u00e0 4 ports isol\u00e9s pouvant g\u00e9n\u00e9rer jusqu\u2019\u00e0 71,3W"},"content":{"rendered":"

Le LTC4291\/LTC4292 pr\u00e9sente 4 ports PSE ind\u00e9pendants de 2 canaux chacun, assurant une conformit\u00e9 totale avec la derni\u00e8re g\u00e9n\u00e9ration de composants aliment\u00e9s (PD : powered device) au standard IEEE 802.3bt. Le LTC4291 procure une interface num\u00e9rique au PSE h\u00f4te, tandis que le LTC4292 offre l\u2019interface Ethernet de haute tension. Les deux circuits int\u00e9gr\u00e9s communiquent \u00e0 l\u2019aide d\u2019un transformateur Ethernet bon march\u00e9. Le protocole de communication par transformateur d\u2019isolement remplace jusqu\u2019\u00e0 six photocoupleurs co\u00fbteux et une alimentation isol\u00e9e, complexe, de 3,3V, utilis\u00e9s dans les applications traditionnelles, ce qui conduit \u00e0 des \u00e9conomies importantes quant \u00e0 la nomenclature et \u00e0 une r\u00e9alisation plus robuste et de fabrication ais\u00e9e.<\/p>\n

L\u2019ensemble LTC4291\/LTC4292 fonctionne parfaitement avec les contr\u00f4leurs PD au standard 802.3bt, le LT4294 ou le LT4295, constituant des solutions PoE++, PoE+ et PoE compl\u00e8tes. Les syst\u00e8mes peuvent fournir jusqu\u2019\u00e0 71,3W \u00e0 des PD \u00e0 simple signature ou double signature. Les utilisateurs appr\u00e9cieront la robustesse des broches, acceptant 80V. Analog Devices orientel\u2019industrie vers une plus faible dissipation, en surpassant les PSE qui int\u00e8grent des MOSFET \u00e0 RDS(ON) plus \u00e9lev\u00e9e. L\u2019identification du PD est mise en \u0153uvre en utilisant un m\u00e9canisme de d\u00e9tection de tension et de courant en plusieurs points, ce qui assure la meilleure immunit\u00e9 en cas de d\u00e9tection erron\u00e9e d\u2019un PD. La gestion avanc\u00e9e de l\u2019\u00e9nergie inclut un support \u00ab Autoclass \u00bb, un arr\u00eat rapide avec gestion des priorit\u00e9s, une relecture de la puissance et du courant, par port, sur 14bits et des limites de puissance programmables sur 8 bits, des limites de surintensit\u00e9s programmables sur 7 bits. Les syst\u00e8mes peuvent \u00eatre mis \u00e0 jour par micrologiciel, sur le terrain.   Une interface I2C, 1MHz, permet \u00e0 un contr\u00f4leur h\u00f4te de configurer num\u00e9riquement le circuit int\u00e9gr\u00e9 ou de faire des appels de lecture de l\u2019\u00e9tat des ports. Des biblioth\u00e8ques de gestion de la puissance en C sont disponibles pour r\u00e9duire les co\u00fbts d\u2019\u00e9tudes, de recherche et de d\u00e9veloppement et le temps de mise sur le march\u00e9.<\/p>\n

Le LTC4291\/LTC4292 est pr\u00e9sent\u00e9 dans la classe de temp\u00e9ratures industrielles. Le contr\u00f4leur num\u00e9rique LTC4291 est dans un bo\u00eetier QFN de 24 broches, 4mm x 4mm, conforme RoHS, tandis que le LTC4292 est en bo\u00eetier QFN de 40 broches, 6mm x 6mm. Le LTC4291\/LTC4292 est le premier contr\u00f4leur PSE d\u2019Analog Devices, au standard IEEE 802.3bt, qui procure une am\u00e9lioration par rapport au contr\u00f4leur, tr\u00e8s connu, PSE LTC4266 \u00e0 4 ports, au standard 802.3at. <\/p>\n

www.analog.com\/poe<\/a>.<\/p>\n

www.analog.com\/LTC4291<\/a><\/p>\n

Convertisseurs de puissance isol\u00e9s assurant la conformit\u00e9 Classe B<\/a><\/h3>\n

R\u00e9gulateur \u00b5Module, 40V, 2,5A, 150\u00b0C en bo\u00eetier BGA<\/a><\/h3>\n

Synth\u00e9tiseur PLL avec oscillateur command\u00e9 en tension<\/a><\/h3>\n

CAN RF 12 bits \u00e0 10,25 G\u00e9ch\/s<\/a><\/h3>\n

 <\/p>\n

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

Analog Devices annonce le LTC4291\/LTC4292 de Power by Linear, un ensemble contr\u00f4leur d\u2019\u00e9quipements fournisseurs d\u2019\u00e9nergie (PSE), \u00e0 4 ports isol\u00e9s, con\u00e7u pour les syst\u00e8mes r\u00e9pondant \u00e0 la norme IEEE 802.3bt (PoE+), aliment\u00e9s par c\u00e2ble Ethernet (PoE). <\/p>\n","protected":false},"author":9,"featured_media":116439,"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-116438","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Contr\u00f4leur PSE PoE++, \u00e0 4 ports isol\u00e9s pouvant g\u00e9n\u00e9rer jus...<\/title>\n<meta name=\"description\" content=\"Analog Devices annonce le LTC4291\/LTC4292 de Power by Linear, un ensemble 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