{"id":406091,"date":"2022-11-20T17:54:57","date_gmt":"2022-11-20T16:54:57","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=406091"},"modified":"2022-11-20T17:54:57","modified_gmt":"2022-11-20T16:54:57","slug":"circuits-integres-dalimentation-a-commutation-au-zero-de-tension","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/circuits-integres-dalimentation-a-commutation-au-zero-de-tension\/","title":{"rendered":"Circuits int\u00e9gr\u00e9s d’alimentation \u00e0 commutation au z\u00e9ro de tension"},"content":{"rendered":"

La famille de commutateurs flyback InnoSwitch4-Pro propos\u00e9e par Power Integrations<\/a> permet d’obtenir des chargeurs compacts USB PD ou universels d\u2019une puissance allant jusqu\u2019\u00e0 220\u00a0W et offrant un rendement sup\u00e9rieur \u00e0 95%. Int\u00e9grant un robuste commutateur primaire PowiGaN, au nitrure de gallium, et offrant une fr\u00e9quence de commutation pouvant atteindre 140\u00a0kHz en r\u00e9gime permanent, ces dispositifs r\u00e9duisent le nombre de composants et la surface de circuit imprim\u00e9 n\u00e9cessaires aux adaptateurs ultra-compacts destin\u00e9s aux t\u00e9l\u00e9phones portables, aux ordinateurs portables, aux tablettes et autres accessoires multiport.<\/p>\n

\u00ab\u00a0Les CI InnoSwitch4-Pro s’interfacent de mani\u00e8re transparente avec la famille ClampZero de CI \u00e0 pince active de Power\u00a0Integrations, pour assurer une commutation au z\u00e9ro de tension (ZVS) en mode conduction continue (CCM) et en mode conduction discontinue (DCM),\u00a0\u00bb a d\u00e9clar\u00e9 Aditya Kulkarni, Responsable Marketing Produit, chez Power\u00a0Integrations. \u00ab\u00a0La commutation au z\u00e9ro de tension, combin\u00e9e \u00e0 notre technologie PowiGaN, \u00e9limine pratiquement les pertes de commutation. Le rendement d\u00e9passe 95%, ce qui permet aux concepteurs d’\u00e9liminer les dissipateurs thermiques, diffuseurs et autres mat\u00e9riaux d’enrobage g\u00e9n\u00e9ralement indispensables \u00e0 la gestion thermique.<\/p>\n

Une r\u00e9duction suppl\u00e9mentaire de la taille de l’adaptateur est possible en utilisant un dispositif MinE-CAP en plus des CI InnoSwitch4-Pro et ClampZero. \u00c9galement bas\u00e9s sur la technologie PowiGaN, les CI MinE-CAP permettent de r\u00e9duire la taille du condensateur d’entr\u00e9e d’environ 40%.<\/p>\n

Capable de d\u00e9livrer jusqu’\u00e0 220\u00a0W, les CI InnoSwitch4-Pro<\/a> combinent un commutateur primaire PowiGaN 750\u00a0V, un contr\u00f4leur, une liaison retour \u00e0 isolation renforc\u00e9e FluxLink pour le contr\u00f4le au secondaire, une interface I2<\/sup>C, une commande de pince active, et un circuit de redressement synchrone, le tout dans un bo\u00eetier compact InSOP-28. Le haut niveau d’int\u00e9gration simplifie consid\u00e9rablement le d\u00e9veloppement et la fabrication d’alimentations 100% programmables \u00e0 haut rendement. Ces circuits int\u00e9gr\u00e9s flyback programmables, associ\u00e9s aux dispositifs compl\u00e9mentaires ClampZero et MinE-CAP, permettent d’obtenir des formats ultra-compacts et minces, tr\u00e8s recherch\u00e9s sur le march\u00e9 des accessoires OEM, des adaptateurs USB PD et des chargeurs universels rapides (conformes UFCS). L’UFCS est la nouvelle norme publi\u00e9e par l\u2019Association de normalisation des communications chinoise.<\/p>\n

Les CI InnoSwitch4-Pro utilisent un algorithme de contr\u00f4le unique pour permettre la commutation au z\u00e9ro de tension (ZVS) en mode DCM et CCM. Associ\u00e9 au circuit int\u00e9gr\u00e9 ClampZero, l’algorithme permet un fonctionnement \u00e0 fr\u00e9quence plus \u00e9lev\u00e9e, sans baisse de rendement. L\u2019InnoSwitch4-Pro supporte \u00e9galement la commutation \u00ab\u00a0quasi-r\u00e9sonante\u00a0\u00bb en mode DCM et CCM lorsqu’il est utilis\u00e9 seul. Le fonctionnement en mode DCM uniquement peut \u00eatre s\u00e9lectionn\u00e9 pour r\u00e9duire la contrainte de tension sur le FET de redressement synchrone (SR\u00a0FET). Ces nouveaux CI disposent \u00e9galement d\u2019un jeu de commandes optimis\u00e9 pour r\u00e9duire le trafic I2<\/sup>C.<\/p>\n

Les CI de commutation flyback InnoSwitch4-Pro offrent une pr\u00e9cision CV\/CC exceptionnelle, ind\u00e9pendante des composants externes, et consomment moins de 30\u00a0mW \u00e0 vide, tout en offrant des fonctions de d\u00e9tection de ligne et de protection compl\u00e8te. Ces dispositifs sont enti\u00e8rement prot\u00e9g\u00e9s gr\u00e2ce notamment \u00e0 une fonction de red\u00e9marrage automatique, ou de verrouillage en cas de surtension ou de tension insuffisante en sortie\u00a0; \u00e0 des seuils multiples de d\u00e9faut de tension de sortie insuffisante\u00a0; \u00e0 une protection contre la surchauffe \u00e0 verrouillage ou hyst\u00e9r\u00e9sis\u00a0; et \u00e0 une protection contre les courts-circuits du commutateur de bus de sortie.<\/p>\n

Deux mod\u00e8les de r\u00e9f\u00e9rence, le DER-960<\/a> (100\u00a0W), et le RDK-942<\/a> (65\u00a0W), sont disponibles pour les concepteurs qui souhaitent \u00e9valuer le CI InnoSwitch4-Pro.<\/p>\n

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

La famille de commutateurs flyback InnoSwitch4-Pro propos\u00e9e par Power Integrations permet d’obtenir des chargeurs compacts USB PD ou universels d\u2019une puissance allant jusqu\u2019\u00e0 220\u00a0W et offrant un rendement sup\u00e9rieur \u00e0 95%. Int\u00e9grant un robuste commutateur primaire PowiGaN, au nitrure de gallium, et offrant une fr\u00e9quence de commutation pouvant atteindre 140\u00a0kHz en r\u00e9gime permanent, ces dispositifs […]<\/p>\n","protected":false},"author":36,"featured_media":406092,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[1077,936],"domains":[47],"ppma_author":[1154],"class_list":["post-406091","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-alimentations","tag-circuits-integres","domains-electronique-eci"],"acf":[],"yoast_head":"Circuits int\u00e9gr\u00e9s d'alimentation \u00e0 commutation au z\u00e9ro de t...<\/title>\n<meta name=\"description\" content=\"La famille de commutateurs flyback InnoSwitch4-Pro propos\u00e9e par Power Integrations permet d’obtenir des chargeurs compacts USB PD ou universels...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/406091\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Circuits int\u00e9gr\u00e9s d'alimentation \u00e0 commutation au z\u00e9ro de tension\" \/>\n<meta property=\"og:description\" content=\"La famille de commutateurs flyback InnoSwitch4-Pro propos\u00e9e par Power Integrations permet d’obtenir des chargeurs compacts USB PD ou universels d\u2019une puissance allant jusqu\u2019\u00e0 220\u00a0W et offrant un rendement sup\u00e9rieur \u00e0 95%. 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