{"id":6496,"date":"2025-04-24T10:49:48","date_gmt":"2025-04-24T02:49:48","guid":{"rendered":"https:\/\/topfastpcba.com\/?p=6496"},"modified":"2025-04-24T10:49:53","modified_gmt":"2025-04-24T02:49:53","slug":"pcb-efficient-heat-dissipation-solutions","status":"publish","type":"post","link":"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/","title":{"rendered":"Solutions de dissipation thermique efficaces pour les circuits imprim\u00e9s"},"content":{"rendered":"<p>Les \u00e9quipements \u00e9lectroniques g\u00e9n\u00e8rent in\u00e9vitablement de la chaleur au cours de leur fonctionnement, ce qui entra\u00eene une augmentation rapide de leur temp\u00e9rature interne. Si cette chaleur ne peut pas \u00eatre \u00e9vacu\u00e9e rapidement, l'\u00e9quipement continuera \u00e0 se r\u00e9chauffer, ce qui entra\u00eenera une surchauffe des composants et, en fin de compte, affectera s\u00e9rieusement la fiabilit\u00e9 et la dur\u00e9e de vie de l'\u00e9quipement.<br>Par cons\u00e9quent, une bonne conception thermique des cartes de circuits imprim\u00e9s est essentielle, car elle est directement li\u00e9e au fonctionnement stable de l'\u00e9quipement \u00e9lectronique et \u00e0 sa fiabilit\u00e9 \u00e0 long terme.En pratique, comment optimiser les performances thermiques des circuits imprim\u00e9s ?<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#1_Analysis_of_key_factors_affecting_PCB_thermal_performance\" >1.Analyse des facteurs cl\u00e9s affectant les performances thermiques des circuits imprim\u00e9s<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#PCB_design-related_factors\" >Facteurs li\u00e9s \u00e0 la conception du PCB<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Substrate_material_and_structure_factors\" >Facteurs li\u00e9s au mat\u00e9riau et \u00e0 la structure du substrat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Environmental_and_System_Level_Factors\" >Facteurs environnementaux et au niveau du syst\u00e8me<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#2_Thermal_management_solutions_for_PCB_substrate_materials\" >2. Solutions de gestion thermique pour les mat\u00e9riaux de substrat des circuits imprim\u00e9s<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#PCB_substrate_materials_currently_used_in_mainstream_applications_include\" >Les mat\u00e9riaux de substrat pour circuits imprim\u00e9s actuellement utilis\u00e9s dans les applications courantes sont les suivants :<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Modern_electronic_design_brings_thermal_challenges\" >La conception \u00e9lectronique moderne pose des d\u00e9fis thermiques<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Thermal_Optimization_Solutions\" >Solutions d'optimisation thermique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Key_realization_paths_include\" >Les principales voies de r\u00e9alisation sont les suivantes :<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#3_PCB_Component_Layout_Scheme\" >3. Sch\u00e9ma de disposition des composants du circuit imprim\u00e9<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Thermal_partition_layout_principles\" >Principes d'am\u00e9nagement des cloisons thermiques<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Space_layout_strategy\" >Strat\u00e9gie d'am\u00e9nagement de l'espace<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Airflow_channel_design\" >Conception des canaux d'\u00e9coulement de l'air<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Protection_of_heat-sensitive_components\" >Protection des composants sensibles \u00e0 la chaleur<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#High-power_components_to_deal_with\" >Composants de grande puissance \u00e0 g\u00e9rer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Thermal_balance_design\" >Conception de l'\u00e9quilibre thermique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Wiring_thermal_optimization\" >Optimisation thermique du c\u00e2blage<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#4_Efficient_Heat_Dissipation_Solution\" >4. Solution efficace de dissipation de la chaleur<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Localized_heat_dissipation_solution_applicable_to_less_than_3_heat-generating_devices\" >Solution de dissipation thermique localis\u00e9e (applicable \u00e0 moins de 3 dispositifs g\u00e9n\u00e9rateurs de chaleur)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Overall_heat_dissipation_program_applicable_to_more_than_three_heat-generating_devices\" >Programme global de dissipation de la chaleur (applicable \u00e0 plus de trois dispositifs g\u00e9n\u00e9rateurs de chaleur)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-efficient-heat-dissipation-solutions\/#Mixed_heat_dissipation_strategy\" >Strat\u00e9gie de dissipation thermique mixte<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Analysis_of_key_factors_affecting_PCB_thermal_performance\"><\/span>1.Analyse des facteurs cl\u00e9s affectant les performances thermiques des circuits imprim\u00e9s<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_design-related_factors\"><\/span>Facteurs li\u00e9s \u00e0 la conception du PCB<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Optimisation de la conception de la couche de cuivre<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zone de pavage en cuivre : corr\u00e9lation positive avec l'effet de refroidissement, l'extension du pavage en cuivre peut r\u00e9duire la temp\u00e9rature de jonction de 15 \u00e0 25 %.<\/li>\n\n\n\n<li>Choix de l'\u00e9paisseur de cuivre : une \u00e9paisseur de cuivre de 2oz ou plus est recommand\u00e9e pour am\u00e9liorer la conductivit\u00e9 thermique.<br>(2) Conception de la gestion thermique \u00e0 travers le trou<\/li>\n\n\n\n<li>Thermal perforation array: can reduce junction temperature by 8-12\u2103 and improve temperature uniformity in the thickness direction.<\/li>\n\n\n\n<li>Optimisation des param\u00e8tres des trous traversants :<br>\u2713 Suggested hole diameter: 0.2-0.3mm<br>\u2713 Pitch recommendation: 1-1.5mm<br>\u2713 Arrangement: the use of a matrix-type uniform distribution<br>(3) Conception de structures sp\u00e9ciales<\/li>\n\n\n\n<li>\u00c9pine dorsale <a href=\"https:\/\/topfastpcba.com\/fr\/pcb-heat-dissipation\/\">dissipation de la chaleur<\/a> structure : augmentation de la surface de dissipation de la chaleur de 30 \u00e0 40 %.<\/li>\n\n\n\n<li>Conception du masque de soudure : la couche sup\u00e9rieure\/inf\u00e9rieure enti\u00e8rement soud\u00e9e peut augmenter l'efficacit\u00e9 de la dissipation thermique de 5 \u00e0 8 %.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Substrate_material_and_structure_factors\"><\/span>Facteurs li\u00e9s au mat\u00e9riau et \u00e0 la structure du substrat<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Influence de la structure stratifi\u00e9e<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les cartes \u00e0 4 couches peuvent am\u00e9liorer les performances thermiques de 35 \u00e0 45 % par rapport aux cartes \u00e0 double face.<\/li>\n\n\n\n<li>Une structure stratifi\u00e9e sym\u00e9trique est recommand\u00e9e<br>(2) S\u00e9lection du mat\u00e9riau du substrat<\/li>\n\n\n\n<li>Un substrat \u00e0 haute conductivit\u00e9 thermique (par exemple un substrat m\u00e9tallique) peut am\u00e9liorer l'efficacit\u00e9 thermique de 60 \u00e0 80 %.<\/li>\n\n\n\n<li>Les substrats c\u00e9ramiques conviennent aux sc\u00e9narios de densit\u00e9 de puissance tr\u00e8s \u00e9lev\u00e9e.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Environmental_and_System_Level_Factors\"><\/span>Facteurs environnementaux et au niveau du syst\u00e8me<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Conception de l'optimisation du flux d'air<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Principes de mise en page :<br>\u2713 High-power devices downstream of the airflow<br>\u2713 Sensitive devices upstream of the airflow<\/li>\n\n\n\n<li>Conception du canal : maintenir une r\u00e9sistance minimale \u00e0 l'\u00e9coulement<br>(2) Optimisation a\u00e9rodynamique<\/li>\n\n\n\n<li>L'impact de la vitesse du vent : chaque augmentation de la vitesse du vent de 1m\/s, l'efficacit\u00e9 thermique augmente d'environ 15-20%.<\/li>\n\n\n\n<li>Conception des turbulences : Une configuration raisonnable de la structure des turbulences peut am\u00e9liorer l'effet de transfert de chaleur.<br>(3) Consid\u00e9rations relatives \u00e0 l'int\u00e9gration du syst\u00e8me<\/li>\n\n\n\n<li>Espacement des composants : Maintenir un espacement minimum de 3 \u00e0 5 mm pour assurer une bonne circulation de l'air.<\/li>\n\n\n\n<li>Coordination structurelle :Assurer un bon couplage avec le syst\u00e8me de refroidissement du ch\u00e2ssis.<br>Note: The actual design needs to be combined with thermal simulation tools for multi-parameter optimization; there is a coupling effect between the factors; it is recommended to use orthogonal test methods to determine the best combination of parameters. For application scenarios with a power density of more than 10W\/cm\u00b2, it is recommended to use active cooling solutions to assist.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"654\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/04\/Heat-Dissipation1-1024x654.jpg\" alt=\"\" class=\"wp-image-6497\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/04\/Heat-Dissipation1-1024x654.jpg 1024w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/04\/Heat-Dissipation1-300x192.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/04\/Heat-Dissipation1-768x490.jpg 768w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/04\/Heat-Dissipation1-150x96.jpg 150w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/04\/Heat-Dissipation1.jpg 1051w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Thermal_management_solutions_for_PCB_substrate_materials\"><\/span>2. Solutions de gestion thermique pour les mat\u00e9riaux de substrat des circuits imprim\u00e9s<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Limites thermiques des mat\u00e9riaux traditionnels pour circuits imprim\u00e9s<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_substrate_materials_currently_used_in_mainstream_applications_include\"><\/span>Les mat\u00e9riaux de substrat pour circuits imprim\u00e9s actuellement utilis\u00e9s dans les applications courantes sont les suivants :<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Substrat en tissu de verre recouvert de cuivre \/ \u00e9poxy<\/li>\n\n\n\n<li>Substrat de tissu de verre en r\u00e9sine ph\u00e9nolique<\/li>\n\n\n\n<li>Stratifi\u00e9s \u00e0 base de papier recouverts de cuivre (un petit nombre d'applications)<br>Bien que ces mat\u00e9riaux pr\u00e9sentent d'excellentes propri\u00e9t\u00e9s \u00e9lectriques et caract\u00e9ristiques de traitement, leur conductivit\u00e9 thermique est nettement insuffisante :<\/li>\n\n\n\n<li>Les substrats en r\u00e9sine ont une faible conductivit\u00e9 thermique et ne peuvent pas conduire efficacement la chaleur.<\/li>\n\n\n\n<li>La chaleur est dissip\u00e9e par convection naturelle de la surface du composant vers l'air ambiant.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Modern_electronic_design_brings_thermal_challenges\"><\/span>La conception \u00e9lectronique moderne pose des d\u00e9fis thermiques<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Avec le d\u00e9veloppement de la miniaturisation des \u00e9quipements \u00e9lectroniques et l'int\u00e9gration \u00e0 haute densit\u00e9, le probl\u00e8me de la dissipation de la chaleur devient de plus en plus important :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La taille des composants continue de diminuer, la zone de dissipation thermique effective est fortement r\u00e9duite.<\/li>\n\n\n\n<li>Les composants QFP, BGA et autres composants mont\u00e9s en surface sont largement utilis\u00e9s, de sorte que le circuit imprim\u00e9 est devenu la principale voie de conduction de la chaleur.<\/li>\n\n\n\n<li>La densit\u00e9 de puissance continue d'augmenter, les m\u00e9thodes traditionnelles de dissipation de la chaleur ne peuvent pas r\u00e9pondre \u00e0 la demande.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_Optimization_Solutions\"><\/span>Solutions d'optimisation thermique<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>En r\u00e9ponse aux d\u00e9fis susmentionn\u00e9s, la strat\u00e9gie de gestion thermique la plus efficace est la suivante :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Am\u00e9liorer la conductivit\u00e9 thermique du substrat du circuit imprim\u00e9 lui-m\u00eame.<\/li>\n\n\n\n<li>Optimiser le chemin de conduction de la chaleur entre les composants g\u00e9n\u00e9rateurs de chaleur et le circuit imprim\u00e9.<\/li>\n\n\n\n<li>Optimiser le chemin de transfert de chaleur entre les composants g\u00e9n\u00e9rateurs de chaleur et la carte de circuit imprim\u00e9. Am\u00e9liorer l'efficacit\u00e9 de la dissipation de la chaleur du circuit imprim\u00e9 vers l'environnement.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_realization_paths_include\"><\/span>Les principales voies de r\u00e9alisation sont les suivantes :<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Adoption de mat\u00e9riaux de substrat \u00e0 haute conductivit\u00e9 thermique.<br>(2) Optimiser la disposition des feuilles de cuivre et la conception des trous conducteurs de chaleur.<br>(3) Combinaison de mat\u00e9riaux d'interface thermique pour am\u00e9liorer l'efficacit\u00e9 du transfert de chaleur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_PCB_Component_Layout_Scheme\"><\/span>3. Sch\u00e9ma de disposition des composants du circuit imprim\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Arrangement des composants Direction<br>Pour les appareils qui utilisent la dissipation thermique par convection naturelle, il est recommand\u00e9 de disposer les circuits int\u00e9gr\u00e9s et les autres composants dans un ordre vertical ou horizontal afin de former les meilleurs canaux de circulation d'air.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_partition_layout_principles\"><\/span>Principes d'am\u00e9nagement des cloisons thermiques<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) R\u00e9partition en fonction des caract\u00e9ristiques de production de chaleur :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les composants \u00e0 faible consommation d'\u00e9nergie ou sensibles \u00e0 la chaleur (tels que les transistors \u00e0 petit signal, les circuits int\u00e9gr\u00e9s de petite taille, les composants \u00e9lectrolytiques, etc. <a href=\"https:\/\/topfastpcba.com\/fr\/what-is-a-capacitor\/\">condensateurs<\/a>etc.) sont dispos\u00e9s en amont du flux d'air de refroidissement (pr\u00e8s de l'entr\u00e9e d'air)<\/li>\n\n\n\n<li>Les composants \u00e0 forte puissance ou r\u00e9sistants \u00e0 la chaleur (tels que les tubes de puissance, les grands circuits int\u00e9gr\u00e9s, etc.) doivent \u00eatre plac\u00e9s en aval du flux d'air.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Space_layout_strategy\"><\/span>Strat\u00e9gie d'am\u00e9nagement de l'espace<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Direction horizontale :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Les appareils de forte puissance doivent \u00eatre dispos\u00e9s pr\u00e8s du bord du circuit imprim\u00e9 afin de raccourcir le chemin de conduction de la chaleur.<br>(2) Direction verticale :<\/li>\n\n\n\n<li>Il est recommand\u00e9 de placer les appareils de forte puissance dans la partie sup\u00e9rieure du circuit imprim\u00e9 afin de r\u00e9duire l'impact thermique sur les autres composants.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Airflow_channel_design\"><\/span>Conception des canaux d'\u00e9coulement de l'air<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) \u00e9viter la formation de zones mortes sur la carte de circuits imprim\u00e9s afin d'assurer une bonne circulation de l'air<br>(2) Le syst\u00e8me multicarte doit \u00eatre pris en compte dans la distribution globale du flux d'air.<br>(3) Pr\u00eater attention aux caract\u00e9ristiques du flux d'air, choisir naturellement un chemin \u00e0 faible r\u00e9sistance et une configuration raisonnable de la densit\u00e9 des composants.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Protection_of_heat-sensitive_components\"><\/span>Protection des composants sensibles \u00e0 la chaleur<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Les dispositifs sensibles \u00e0 la temp\u00e9rature doivent \u00eatre plac\u00e9s dans des zones \u00e0 basse temp\u00e9rature (comme le fond de l'appareil).<br>(2) Il est strictement interdit de placer des dispositifs sensibles dans l'\u00e9l\u00e9ment chauffant situ\u00e9 directement au-dessus de l'\u00e9l\u00e9ment chauffant.<br>(3) Il est recommand\u00e9 d'utiliser une disposition horizontale en quinconce.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-power_components_to_deal_with\"><\/span>Composants de grande puissance \u00e0 g\u00e9rer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) La principale source de chaleur est plac\u00e9e au meilleur endroit pour la dissipation de la chaleur.<br>(2) \u00c9viter de placer des dispositifs \u00e0 haute temp\u00e9rature dans les coins de la carte (sans dissipation thermique auxiliaire).<br>(3) Les r\u00e9sistances de puissance doivent \u00eatre emball\u00e9es dans des bo\u00eetiers plus grands avec suffisamment d'espace pour la dissipation de la chaleur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_balance_design\"><\/span>Conception de l'\u00e9quilibre thermique<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) \u00c9viter l'agr\u00e9gation thermique localis\u00e9e<br>(2) Essayer de r\u00e9partir uniform\u00e9ment les dispositifs d'alimentation<br>(3) maintenir l'uniformit\u00e9 du champ de temp\u00e9rature de la surface du circuit imprim\u00e9<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wiring_thermal_optimization\"><\/span>Optimisation thermique du c\u00e2blage<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Exploiter pleinement la conductivit\u00e9 thermique de la feuille de cuivre<br>(2) Am\u00e9liorer la couverture de la feuille de cuivre dans la couche de c\u00e2blage<br>(3) D\u00e9finir raisonnablement la conductivit\u00e9 thermique du r\u00e9seau de trous<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Efficient_Heat_Dissipation_Solution\"><\/span>4. Solution efficace de dissipation de la chaleur<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Localized_heat_dissipation_solution_applicable_to_less_than_3_heat-generating_devices\"><\/span>Solution de dissipation thermique localis\u00e9e (applicable \u00e0 moins de 3 dispositifs g\u00e9n\u00e9rateurs de chaleur)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Configuration de base de la dissipation de la chaleur :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Installation de dissipateurs thermiques s\u00e9par\u00e9s pour les dispositifs g\u00e9n\u00e9rant beaucoup de chaleur<\/li>\n\n\n\n<li>Utilisation de caloducs pour am\u00e9liorer l'efficacit\u00e9 de la conduction thermique<br>(2) Am\u00e9lioration du programme de dissipation de la chaleur :<\/li>\n\n\n\n<li>Lorsque la dissipation thermique passive est insuffisante<\/li>\n\n\n\n<li>Ajouter une combinaison ventilateur-refroidisseur actif<\/li>\n\n\n\n<li>Am\u00e9liorer l'efficacit\u00e9 de la dissipation de la chaleur de 30 \u00e0 50 %.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overall_heat_dissipation_program_applicable_to_more_than_three_heat-generating_devices\"><\/span>Programme global de dissipation de la chaleur (applicable \u00e0 plus de trois dispositifs g\u00e9n\u00e9rateurs de chaleur)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Solution thermique personnalis\u00e9e :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Personnaliser le dissipateur thermique global en fonction de la configuration de l'appareil<\/li>\n\n\n\n<li>Adaptation pr\u00e9cise de la hauteur et de la position des composants<\/li>\n\n\n\n<li>Usinage CNC pour garantir la pr\u00e9cision des contacts<br>(2) Mesures d'optimisation des performances :<\/li>\n\n\n\n<li>Installation d'entretoises flexibles en mat\u00e9riau \u00e0 changement de phase thermoconducteur<\/li>\n\n\n\n<li>Compenser la tol\u00e9rance de hauteur de soudage des composants<\/li>\n\n\n\n<li>Am\u00e9liorer la conductivit\u00e9 thermique de la surface de contact de 60 %.<br>(3) Attention :<\/li>\n\n\n\n<li>Tenir compte de la r\u00e9sistance structurelle globale<\/li>\n\n\n\n<li>R\u00e9server un espace appropri\u00e9 pour la dilatation thermique<\/li>\n\n\n\n<li>Attention \u00e0 la conception des canaux d'\u00e9coulement de l'air<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mixed_heat_dissipation_strategy\"><\/span>Strat\u00e9gie de dissipation thermique mixte<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Combiner les avantages de la dissipation thermique locale et globale<\/li>\n\n\n\n<li>Double dissipation thermique pour les composants critiques g\u00e9n\u00e9rateurs de chaleur<\/li>\n\n\n\n<li>Optimiser les performances thermiques du syst\u00e8me<br>Note : Dans la pratique, il est n\u00e9cessaire de choisir la bonne combinaison de solutions thermiques en fonction de la charge thermique sp\u00e9cifique, des contraintes d'espace et du budget.<\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Une bonne conception thermique des cartes de circuits imprim\u00e9s est essentielle, car elle est directement li\u00e9e au fonctionnement stable de l'\u00e9quipement \u00e9lectronique et \u00e0 sa fiabilit\u00e9 \u00e0 long terme. Ainsi, dans la pratique<\/p>","protected":false},"author":2,"featured_media":6498,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-6496","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Efficient Heat Dissipation Solutions - Topfastpcba<\/title>\n<meta name=\"description\" content=\"good thermal design for PCB circuit boards is critical, as it is directly related to the stable operation of electronic equipment and long-term reliability. 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