{"id":120848,"date":"2018-05-22T22:31:44","date_gmt":"2018-05-22T22:31:44","guid":{"rendered":"https:\/\/\/rendement-maximum-pour-les-amplificateurs-audio-numeriques-classe-d-de-maxim\/"},"modified":"2018-05-22T22:31:44","modified_gmt":"2018-05-22T22:31:44","slug":"rendement-maximum-pour-les-amplificateurs-audio-numeriques-classe-d-de-maxim","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/rendement-maximum-pour-les-amplificateurs-audio-numeriques-classe-d-de-maxim\/","title":{"rendered":"Rendement maximum pour les amplificateurs audio num\u00e9riques Classe D de Maxim"},"content":{"rendered":"<p>Malgr\u00e9 leur format ultra-miniature, ces amplificateurs Classe D fournissent 3,2W de performances audio dignes d\u2019une Classe AB et le rendement d\u2019une classe D, associ\u00e9s \u00e0 une excellente qualit\u00e9 audio, et ils conviennent \u00e0 un large \u00e9ventail d&rsquo;applications.&nbsp;<br \/>\nTraditionnellement, les concepteurs d\u2019\u00e9lectronique utilisent des amplificateurs analogiques, qui n\u00e9cessitent un CNA (convertisseur num\u00e9rique-analogique) et un amplificateur driver de ligne, au niveau du processeur d&rsquo;application. Cela rench\u00e9rit le co\u00fbt global de la puce au niveau de la sortie haut-parleur, et affecte aussi les dimensions g\u00e9n\u00e9rales de la solution. Avec la mont\u00e9e en puissance des appareils \u00e0 commande vocale, les concepteurs doivent aussi r\u00e9pondre \u00e0 la demande actuelle croissante en faveur d\u2019une qualit\u00e9 audio sup\u00e9rieure, tout en conservant une conception simple, une faible consommation et un bon rendement. &nbsp;<br \/>\nLes amplificateurs MAX98357 \u00e0 modulation PCM (Pulse Code Modulation, ou modulation \u00e0 impulsions cod\u00e9es) et MAX98358 \u00e0 modulation PDM (Pulse Density Modulation, ou modulation de densit\u00e9 d&rsquo;impulsions) r\u00e9duisent la taille globale de la solution, en profitant du brochage astucieux de Maxim, et en r\u00e9duisant consid\u00e9rablement le nombre de composants n\u00e9cessaires par rapport aux circuits typiques \u00e0 amplificateur analogique. Etant donn\u00e9 que la plupart des utilisateurs contr\u00f4lent le volume num\u00e9riquement en amont, ces caract\u00e9ristiques permettent de profiter du bo\u00eetier WLP (Wafer Level Package) \u00e9conomique de Maxim, sans avoir recours \u00e0 de co\u00fbteuses interconnexions par vias (trous m\u00e9tallis\u00e9s). Pour offrir une qualit\u00e9 audio exceptionnelle, ces amplificateurs disposent d&rsquo;une entr\u00e9e num\u00e9rique assurant l&rsquo;immunit\u00e9 au bruit, et d&rsquo;une excellente tol\u00e9rance \u00e0 la gigue (au minimum 8 dB de plus que les solutions concurrentes). Ils offrent \u00e9galement d&rsquo;excellentes performances au niveau parasites \u00e9lectromagn\u00e9tiques (EMI), et permettent d\u2019utiliser des pistes plus longues jusqu\u2019aux hauts-parleurs, sans filtrage externe suppl\u00e9mentaire. En outre, ils offrent le rendement Classe D le plus \u00e9lev\u00e9 du march\u00e9. Pour simplifier la conception, la fonctionnalit\u00e9 \u00ab\u00a0Plug-and-Play\u00a0\u00bb signifie que les utilisateurs n\u2019ont qu\u2019\u00e0 connecter une alimentation unique et les signaux BCLK (Bit Clock, ou horloge binaire) et LRCLK (Left-Right Clock, ou horloge gauche-droite) des MAX98357 et MAX98358, sans avoir \u00e0 utiliser d&rsquo;horloge ma\u00eetresse (MCLK). Ces amplificateurs simplifient encore la conception en permettant d\u2019obtenir automatiquement jusqu&rsquo;\u00e0 35 configurations d&rsquo;horloge, et 128 formats num\u00e9riques audio diff\u00e9rents. Cette configuration automatique \u00e9vite la programmation I\u00b2S compliqu\u00e9e, puisqu\u2019il n&rsquo;est plus n\u00e9cessaire de modifier le code de base pour ajouter la fonctionnalit\u00e9 audio \u00e0 un projet. \u00c9tant donn\u00e9 que de plus en plus d&rsquo;applications (comme les enceintes connect\u00e9es) ont besoin de syst\u00e8mes audio multi-directionnels et multi-canaux, la demande en faveur d&rsquo;amplificateurs comme les MAX98357 et MAX98358, que l\u2019on peut facilement raccorder en cha\u00eene pour g\u00e9rer des r\u00e9seaux d&rsquo;enceintes (jusqu&rsquo;\u00e0 8 canaux g\u00e9rables par multiplexage temporel ou TDM), va continuer de cro\u00eetre.<\/p>\n<p>Pour plus d\u2019informations sur le MAX98357 :&nbsp;&nbsp;<br \/>\nPour plus d\u2019informations sur le MAX98358 :&nbsp;&nbsp;<\/p>\n<p><a href=\"http:\/\/www.maximintegrated.com \\t _blank\">www.maximintegrated.com<\/a><\/p>\n<h3 class=\"title\"><a href=\"http:\/\/www.electronique-eci.com\/news\/modules-de-puissance-4-42v-miniatures\">Modules de puissance 4 \u00e0 42V miniatures<\/a><\/h3>\n<h3 class=\"title\"><a href=\"http:\/\/www.electronique-eci.com\/Learning-center\/plus-de-puissance-que-jamais-dans-votre-capteur-miniature\">Plus de puissance que jamais dans votre capteur miniature<\/a><\/h3>\n<h3 class=\"title\"><a href=\"http:\/\/www.electronique-eci.com\/news\/microcontroleurs-prolongeant-la-vie-des-batteries-des-wearables\">Microcontr\u00f4leurs prolongeant la vie des batteries des wearables<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>Gr\u00e2ce aux amplificateurs audio num\u00e9riques classe D MAX98357 et MAX98358 de Maxim Integrated Products, Inc, les concepteurs peuvent obtenir un rendement excellent, avec une solution Plug-and-Play, compacte et \u00e9conomique. <\/p>\n","protected":false},"author":9,"featured_media":120849,"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-120848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Rendement maximum pour les amplificateurs audio num\u00e9riques Cla...<\/title>\n<meta name=\"description\" content=\"Gr\u00e2ce aux amplificateurs audio num\u00e9riques classe D MAX98357 et MAX98358 de Maxim Integrated Products, Inc, les concepteurs peuvent obtenir un rendement...\" \/>\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\/120848\/\" \/>\n<meta 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