{"id":11291,"date":"2020-08-04T20:50:59","date_gmt":"2020-08-04T20:50:59","guid":{"rendered":"https:\/\/summitinterconnect.ca\/blog\/article\/presentation-du-systeme-dalimentation\/"},"modified":"2025-12-17T10:48:50","modified_gmt":"2025-12-17T10:48:50","slug":"circuit-analysis-part-1","status":"publish","type":"post","link":"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/","title":{"rendered":"Pr\u00e9sentation du syst\u00e8me d'alimentation"},"content":{"rendered":"<p>Avant de concevoir un circuit imprim\u00e9, il est g\u00e9n\u00e9ralement recommand\u00e9 de bien **comprendre son sch\u00e9ma \u00e9lectrique**.<br \/>\nEt avant d\u2019\u00e9laborer un sch\u00e9ma, il est essentiel de **comprendre son diagramme fonctionnel**.<\/p>\n<h2>Vue d\u2019ensemble<\/h2>\n<p>Ci-dessous se trouve le **diagramme fonctionnel de base** d\u2019un circuit.<br \/>\nLe r\u00f4le de l\u2019**ing\u00e9nieur en \u00e9lectronique** est de d\u00e9terminer **comment chaque bloc et chaque bus de donn\u00e9es doivent fonctionner correctement** sans interf\u00e9rer avec les autres parties du circuit.  <\/p>\n<p>Chaque **bloc** du diagramme est ensuite **converti en sch\u00e9ma \u00e9lectrique**.<\/p><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/RoyalCircuitsWebCourse20200303.jpg\" alt=\"\"><\/figure><h3>Pouvoir<\/h3>\n<p>L'alimentation du sch\u00e9ma de circuit ci-dessus est fournie par des piles. Les piles alimentent un r\u00e9gulateur lin\u00e9aire \u00e0 faible chute de tension (LDO) qui fournit 5 V pour alimenter les LED RVB adressables ainsi qu'un LDO 3,3 V qui alimente le reste du circuit. Un traducteur de niveau logique convertira les sorties logiques 3,3 V du Mega en entr\u00e9es logiques 5,0 V.  <\/p>\n<h3>Bus de donn\u00e9es s\u00e9rie<\/h3>\n<p>Quatre bus de donn\u00e9es s\u00e9rie sont pr\u00e9sents dans notre exemple de circuit et sont utilis\u00e9s pour transf\u00e9rer des informations.<\/p>\n<ul>\n<li>Un bus d'interface s\u00e9rie-p\u00e9riph\u00e9rique (SPI) qui communique avec le module TFT<\/li>\n<li>R\u00e9ception et transmission asynchrones universelles (UART) utilis\u00e9es pour programmer le microcontr\u00f4leur<\/li>\n<li>I2C qui communique avec nos capteurs et notre module d'horloge temps r\u00e9el (RTC)<\/li>\n<li>Un bus s\u00e9rie universel utilis\u00e9 pour communiquer avec un ordinateur externe pour la programmation et le d\u00e9bogage.<\/li>\n<\/ul>\n<h3>Broches GPIO<\/h3>\n<ul>\n<li>Plusieurs broches serviront \u00e0 commander les LED RGB adressables, \u00e0 lire l'\u00e9tat des boutons poussoirs et \u00e0 activer un buzzer pi\u00e9zo.<\/li>\n<\/ul>\n<h3>Interaction des blocs<\/h3>\n<p>Les blocs doivent \u00eatre con\u00e7us et connect\u00e9s ind\u00e9pendamment au microcontr\u00f4leur principal. Il existe plusieurs m\u00e9thodes courantes pour ce faire, notamment les r\u00e9seaux globaux, les ports de connexion et les blocs hi\u00e9rarchiques. Avec les blocs hi\u00e9rarchiques, chaque bloc de circuit est con\u00e7u ind\u00e9pendamment sur une page hi\u00e9rarchique, puis connect\u00e9 au niveau sup\u00e9rieur via des connecteurs hi\u00e9rarchiques. Dans une disposition hi\u00e9rarchique, seules les connexions entre les blocs sont affich\u00e9es au niveau sup\u00e9rieur (entr\u00e9es, sorties, lignes de commutation, etc.). Les connexions d'alimentation sont souvent \u00e9galement incluses.    <\/p><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/Badge_v20200330_HB_BlockOverview-1-999x1024.jpg\" alt=\"\"><figcaption class=\"img-caption__caption\">Cette vue hi\u00e9rarchique par blocs montre les connexions entre les diff\u00e9rentes parties du sch\u00e9ma. Chaque bloc repr\u00e9sente une page distincte du sch\u00e9ma. <\/figcaption><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/transistor-status-1-Copy.jpg\" alt=\"\"><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/BobsMagicSourceSelector-1-Copy-1024x434.jpg\" alt=\"\"><\/figure><p>Comme vous pouvez l\u2019imaginer, rien ne se passe. Les MOSFET \u00e0 canal P se comportent comme un commutateur normalement ferm\u00e9 (conducteur) qui s\u2019ouvre (non conducteur) lorsqu\u2019une tension est pr\u00e9sente sur la grille. \u00c9tant donn\u00e9 qu\u2019aucune tension n\u2019est pr\u00e9sente sur la grille de Q1, Q2, Q3 ou Q4, les \u00ab commutateurs \u00bb sont tous ferm\u00e9s et tout courant qui arrive sera facilement conduit.  <\/p>\n<h3>Option 2\u00a0: Seule la batterie est connect\u00e9e<\/h3><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/transistor-status-2-Copy-2.jpg\" alt=\"\"><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/BobsSourceSelector_OPT1..jpg\" alt=\"\"><\/figure><p>Avec la batterie attach\u00e9e et l'interrupteur allum\u00e9, le courant circule vers le LDO 5,0 V et via Q3 et Q4 vers le LDO 3,3 V et vers le reste du circuit. R3 maintient le potentiel de grille de Q3 et Q4 \u00e0 0 V. En m\u00eame temps, les grilles de Q1 et Q2 sont aliment\u00e9es, ce qui arr\u00eate la conduction inverse du courant \u00e0 travers le circuit.  <\/p>\n<h3>Option 3\u00a0: Connexion USB uniquement<\/h3><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/transistor-status-3-Copy-2.jpg\" alt=\"\"><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/BobsSourceSelector_OPT2..jpg\" alt=\"\"><\/figure><p>Lorsque l'alimentation USB est connect\u00e9e, R2 maintient la grille de Q1 et Q2 et le potentiel de masse, ce qui permet \u00e0 Q1 et Q2 de conduire le courant entre la source et le drain. Dans le m\u00eame temps, les grilles de Q3 et Q4 sont connect\u00e9es au r\u00e9seau qui relie Q1 et Q2, fermant les chemins conducteurs entre le drain et la source de Q3 et Q4, ce qui emp\u00eache le retour du courant. <\/p>\n<h3>Option 4\u00a0: Les deux sources jointes<\/h3><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/transistor-status-4-Copy-Copy.jpg\" alt=\"\"><\/figure><figure class=\"img-caption\"><img decoding=\"async\" loading=\"lazy\" class=\"img-caption__img\" src=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/BobsSourceSelector_OPT3.jpg\" alt=\"\"><\/figure><p>Lorsque les deux sources sont sous tension, le LDO 5,0 V g\u00e9n\u00e8re une diff\u00e9rence de potentiel aux portes de Q1 et Q2, coupant le chemin de conduction \u00e0 travers le drain et la source, arr\u00eatant le courant USB_VBUS avant qu'il n'ait la possibilit\u00e9 d'entrer dans le reste du circuit.<\/p>","protected":false},"excerpt":{"rendered":"<p>Avant de concevoir un circuit imprim\u00e9, il est g\u00e9n\u00e9ralement recommand\u00e9 de bien **comprendre son sch\u00e9ma \u00e9lectrique**. Et avant d\u2019\u00e9laborer un sch\u00e9ma, il est essentiel de **comprendre son diagramme fonctionnel**. Vue d\u2019ensemble Ci-dessous se trouve le **diagramme fonctionnel de base** d\u2019un circuit. Le r\u00f4le de l\u2019**ing\u00e9nieur en \u00e9lectronique** est de d\u00e9terminer **comment chaque bloc et chaque [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[86,84],"tags":[],"class_list":["post-11291","post","type-post","status-publish","format-standard","hentry","category-conception","category-fabrication-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pr\u00e9sentation du syst\u00e8me d&#039;alimentation - Summit Interconnect CA<\/title>\n<meta name=\"description\" content=\"Summit Interconnect, une soci\u00e9t\u00e9 de fabrication de circuits imprim\u00e9s, explique comment les ing\u00e9nieurs \u00e9lectriciens utilisent leurs connaissances des syst\u00e8mes d&#039;alimentation pour garantir que les blocs n&#039;interf\u00e8rent pas lors de la fabrication de circuits imprim\u00e9s \u00e0 rotation rapide.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pr\u00e9sentation du syst\u00e8me d&#039;alimentation - Summit Interconnect CA\" \/>\n<meta property=\"og:description\" content=\"Summit Interconnect, une soci\u00e9t\u00e9 de fabrication de circuits imprim\u00e9s, explique comment les ing\u00e9nieurs \u00e9lectriciens utilisent leurs connaissances des syst\u00e8mes d&#039;alimentation pour garantir que les blocs n&#039;interf\u00e8rent pas lors de la fabrication de circuits imprim\u00e9s \u00e0 rotation rapide.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/\" \/>\n<meta property=\"og:site_name\" content=\"Summit Interconnect CA\" \/>\n<meta property=\"article:published_time\" content=\"2020-08-04T20:50:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-17T10:48:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/RoyalCircuitsWebCourse20200303.jpg\" \/>\n<meta name=\"author\" content=\"Lisa Holmes\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lisa Holmes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/\"},\"author\":{\"name\":\"Lisa Holmes\",\"@id\":\"https:\/\/summitinterconnect.ca\/fr\/#\/schema\/person\/747c1b56e5f9edb8ba5900d796562bb9\"},\"headline\":\"Pr\u00e9sentation du syst\u00e8me d'alimentation\",\"datePublished\":\"2020-08-04T20:50:59+00:00\",\"dateModified\":\"2025-12-17T10:48:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/\"},\"wordCount\":696,\"image\":{\"@id\":\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/summitinterconnect.com\/wp-content\/uploads\/2022\/02\/RoyalCircuitsWebCourse20200303.jpg\",\"articleSection\":[\"Conception\",\"Fabrication\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/\",\"url\":\"https:\/\/summitinterconnect.ca\/fr\/blog\/article\/circuit-analysis-part-1\/\",\"name\":\"Pr\u00e9sentation du syst\u00e8me d'alimentation - 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