{"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\/pt\/pcb-efficient-heat-dissipation-solutions\/","title":{"rendered":"Solu\u00e7\u00f5es de dissipa\u00e7\u00e3o de calor eficientes para PCBs"},"content":{"rendered":"<p>Os equipamentos eletr\u00f4nicos no processo de trabalho inevitavelmente geram calor, resultando em um r\u00e1pido aumento da temperatura interna. Se esse calor n\u00e3o puder ser emitido prontamente de forma eficaz, o equipamento continuar\u00e1 a se aquecer, o que, por sua vez, provocar\u00e1 falha por superaquecimento dos componentes e, por fim, afetar\u00e1 seriamente a confiabilidade e a vida \u00fatil do equipamento.<br>Portanto, um bom projeto t\u00e9rmico para placas de circuito impresso \u00e9 fundamental, pois est\u00e1 diretamente relacionado \u00e0 opera\u00e7\u00e3o est\u00e1vel de equipamentos eletr\u00f4nicos e \u00e0 confiabilidade de longo prazo.Ent\u00e3o, na pr\u00e1tica, como devemos otimizar o desempenho t\u00e9rmico da PCB?<\/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\">\u00cdndice<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#1_Analysis_of_key_factors_affecting_PCB_thermal_performance\" >1.An\u00e1lise dos principais fatores que afetam o desempenho t\u00e9rmico de PCBs<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#PCB_design-related_factors\" >Fatores relacionados ao design de PCBs<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Substrate_material_and_structure_factors\" >Fatores de estrutura e material do substrato<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Environmental_and_System_Level_Factors\" >Fatores ambientais e de n\u00edvel de sistema<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#2_Thermal_management_solutions_for_PCB_substrate_materials\" >2. Solu\u00e7\u00f5es de gerenciamento t\u00e9rmico para materiais de substrato de PCB<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#PCB_substrate_materials_currently_used_in_mainstream_applications_include\" >Os materiais de substrato de PCB usados atualmente nas principais aplica\u00e7\u00f5es incluem:<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Modern_electronic_design_brings_thermal_challenges\" >O design eletr\u00f4nico moderno traz desafios t\u00e9rmicos<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Thermal_Optimization_Solutions\" >Solu\u00e7\u00f5es de otimiza\u00e7\u00e3o t\u00e9rmica<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Key_realization_paths_include\" >Os principais caminhos de realiza\u00e7\u00e3o incluem:<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#3_PCB_Component_Layout_Scheme\" >3. Esquema de layout de componentes de PCB<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Thermal_partition_layout_principles\" >Princ\u00edpios do layout da parti\u00e7\u00e3o t\u00e9rmica<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Space_layout_strategy\" >Estrat\u00e9gia de layout do espa\u00e7o<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Airflow_channel_design\" >Projeto do canal de fluxo de ar<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Protection_of_heat-sensitive_components\" >Prote\u00e7\u00e3o de componentes sens\u00edveis ao calor<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#High-power_components_to_deal_with\" >Componentes de alta pot\u00eancia para lidar com<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Thermal_balance_design\" >Projeto de equil\u00edbrio t\u00e9rmico<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Wiring_thermal_optimization\" >Otimiza\u00e7\u00e3o t\u00e9rmica da fia\u00e7\u00e3o<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#4_Efficient_Heat_Dissipation_Solution\" >4. Solu\u00e7\u00e3o eficiente de dissipa\u00e7\u00e3o de calor<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Localized_heat_dissipation_solution_applicable_to_less_than_3_heat-generating_devices\" >Solu\u00e7\u00e3o de dissipa\u00e7\u00e3o de calor localizada (aplic\u00e1vel a menos de 3 dispositivos geradores de calor)<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Overall_heat_dissipation_program_applicable_to_more_than_three_heat-generating_devices\" >Programa geral de dissipa\u00e7\u00e3o de calor (aplic\u00e1vel a mais de tr\u00eas dispositivos geradores de calor)<\/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\/pt\/pcb-efficient-heat-dissipation-solutions\/#Mixed_heat_dissipation_strategy\" >Estrat\u00e9gia mista de dissipa\u00e7\u00e3o de calor<\/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.An\u00e1lise dos principais fatores que afetam o desempenho t\u00e9rmico de PCBs<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>Fatores relacionados ao design de PCBs<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Otimiza\u00e7\u00e3o do design da camada de cobre<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00c1rea de pavimenta\u00e7\u00e3o de cobre: positivamente correlacionada com o efeito de resfriamento, a expans\u00e3o da pavimenta\u00e7\u00e3o de cobre pode reduzir a temperatura da jun\u00e7\u00e3o em 15-25%.<\/li>\n\n\n\n<li>Sele\u00e7\u00e3o da espessura do cobre: recomenda-se uma espessura de cobre de 2oz ou mais para aumentar a condutividade t\u00e9rmica.<br>(2) Projeto de gerenciamento t\u00e9rmico atrav\u00e9s do orif\u00edcio<\/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>Otimiza\u00e7\u00e3o dos par\u00e2metros do orif\u00edcio de passagem:<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) Projeto de estrutura especial<\/li>\n\n\n\n<li>Osso de cachorro <a href=\"https:\/\/topfastpcba.com\/pt\/pcb-heat-dissipation\/\">dissipa\u00e7\u00e3o de calor<\/a> estrutura: aumenta a \u00e1rea efetiva de dissipa\u00e7\u00e3o de calor em 30-40%.<\/li>\n\n\n\n<li>Design da m\u00e1scara de solda: a camada superior\/inferior totalmente soldada pode aumentar a efici\u00eancia da dissipa\u00e7\u00e3o de calor em 5 a 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>Fatores de estrutura e material do substrato<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Influ\u00eancia da estrutura laminada<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>As placas de 4 camadas podem melhorar o desempenho t\u00e9rmico em 35-45% em compara\u00e7\u00e3o com as placas de dupla face.<\/li>\n\n\n\n<li>Recomenda-se uma estrutura laminada sim\u00e9trica<br>(2) Sele\u00e7\u00e3o do material do substrato<\/li>\n\n\n\n<li>Um substrato de alta condutividade t\u00e9rmica (por exemplo, substrato de metal) pode melhorar a efici\u00eancia t\u00e9rmica em 60 a 80%.<\/li>\n\n\n\n<li>Os substratos de cer\u00e2mica s\u00e3o adequados para cen\u00e1rios de densidade de pot\u00eancia ultra-alta.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Environmental_and_System_Level_Factors\"><\/span>Fatores ambientais e de n\u00edvel de sistema<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Projeto de otimiza\u00e7\u00e3o do fluxo de ar<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Princ\u00edpios de layout:<br>\u2713 High-power devices downstream of the airflow<br>\u2713 Sensitive devices upstream of the airflow<\/li>\n\n\n\n<li>Projeto do canal: manter um caminho de resist\u00eancia m\u00ednima ao fluxo<br>(2) Otimiza\u00e7\u00e3o aerodin\u00e2mica<\/li>\n\n\n\n<li>O impacto da velocidade do vento: a cada aumento na velocidade do vento de 1 m\/s, a efici\u00eancia t\u00e9rmica aumenta em cerca de 15 a 20%<\/li>\n\n\n\n<li>Projeto de turbul\u00eancia: Uma configura\u00e7\u00e3o razo\u00e1vel da estrutura de turbul\u00eancia pode aumentar o efeito de transfer\u00eancia de calor.<br>(3) Considera\u00e7\u00f5es sobre a integra\u00e7\u00e3o do sistema<\/li>\n\n\n\n<li>Espa\u00e7amento entre componentes: Mantenha um espa\u00e7amento m\u00ednimo de 3 a 5 mm para garantir um fluxo de ar suave.<\/li>\n\n\n\n<li>Coordena\u00e7\u00e3o estrutural:Garanta um bom acoplamento com o sistema de resfriamento do chassi.<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. Solu\u00e7\u00f5es de gerenciamento t\u00e9rmico para materiais de substrato de PCB<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Limita\u00e7\u00f5es t\u00e9rmicas dos materiais tradicionais de PCB<\/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>Os materiais de substrato de PCB usados atualmente nas principais aplica\u00e7\u00f5es incluem:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Substrato de tecido de vidro revestido de cobre\/ep\u00f3xi<\/li>\n\n\n\n<li>Substrato de tecido de vidro de resina fen\u00f3lica<\/li>\n\n\n\n<li>Laminados revestidos de cobre \u00e0 base de papel (um pequeno n\u00famero de aplica\u00e7\u00f5es)<br>Embora esses materiais tenham excelentes propriedades el\u00e9tricas e caracter\u00edsticas de processamento, sua condutividade t\u00e9rmica \u00e9 significativamente deficiente:<\/li>\n\n\n\n<li>Os substratos de resina t\u00eam baixa condutividade t\u00e9rmica e n\u00e3o conseguem conduzir o calor com efic\u00e1cia<\/li>\n\n\n\n<li>Depende muito da convec\u00e7\u00e3o natural da superf\u00edcie do componente para o ar ao redor para dissipar o calor<\/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>O design eletr\u00f4nico moderno traz desafios t\u00e9rmicos<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Com o desenvolvimento de equipamentos eletr\u00f4nicos para miniaturiza\u00e7\u00e3o, a dire\u00e7\u00e3o da integra\u00e7\u00e3o de alta densidade, o problema da dissipa\u00e7\u00e3o de calor \u00e9 cada vez mais proeminente:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O tamanho dos componentes continua a diminuir, a \u00e1rea efetiva de dissipa\u00e7\u00e3o de calor \u00e9 bastante reduzida<\/li>\n\n\n\n<li>QFP, BGA e outros componentes de montagem em superf\u00edcie s\u00e3o amplamente usados, de modo que a PCB se tornou o principal caminho de condu\u00e7\u00e3o de calor<\/li>\n\n\n\n<li>A densidade de pot\u00eancia continua a aumentar, e os m\u00e9todos tradicionais de dissipa\u00e7\u00e3o de calor n\u00e3o conseguem atender \u00e0 demanda<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_Optimization_Solutions\"><\/span>Solu\u00e7\u00f5es de otimiza\u00e7\u00e3o t\u00e9rmica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Em resposta aos desafios acima, a estrat\u00e9gia de gerenciamento t\u00e9rmico mais eficaz \u00e9:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Melhorar a condutividade t\u00e9rmica do pr\u00f3prio substrato da placa de circuito impresso.<\/li>\n\n\n\n<li>Otimize o caminho de condu\u00e7\u00e3o de calor dos componentes que geram calor para a placa de circuito impresso.<\/li>\n\n\n\n<li>Otimizar o caminho de transfer\u00eancia de calor dos componentes geradores de calor para a PCB. Melhorar a efici\u00eancia da dissipa\u00e7\u00e3o de calor da PCB para o ambiente<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_realization_paths_include\"><\/span>Os principais caminhos de realiza\u00e7\u00e3o incluem:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Ado\u00e7\u00e3o de materiais de substrato de alta condutividade t\u00e9rmica.<br>(2) Otimizar o layout das folhas de cobre e o design dos orif\u00edcios condutores de calor.<br>(3) Combina\u00e7\u00e3o de materiais de interface t\u00e9rmica para melhorar a efici\u00eancia da transfer\u00eancia de calor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_PCB_Component_Layout_Scheme\"><\/span>3. Esquema de layout de componentes de PCB<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Dire\u00e7\u00e3o do arranjo do componente<br>Para dispositivos que usam dissipa\u00e7\u00e3o de calor por convec\u00e7\u00e3o natural, recomenda-se que os circuitos integrados e outros componentes sejam dispostos em ordem vertical ou horizontal para formar os melhores canais de fluxo de ar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_partition_layout_principles\"><\/span>Princ\u00edpios do layout da parti\u00e7\u00e3o t\u00e9rmica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Parti\u00e7\u00e3o de acordo com as caracter\u00edsticas de gera\u00e7\u00e3o de calor:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Componentes de baixa pot\u00eancia ou sens\u00edveis ao calor (como transistores de pequenos sinais, CIs de pequena escala, componentes eletrol\u00edticos, etc.) <a href=\"https:\/\/topfastpcba.com\/pt\/what-is-a-capacitor\/\">capacitores<\/a>etc.) est\u00e3o dispostos na parte superior do fluxo de ar de resfriamento (pr\u00f3ximo \u00e0 entrada de ar)<\/li>\n\n\n\n<li>Componentes de alta pot\u00eancia ou resistentes ao calor (como v\u00e1lvulas de pot\u00eancia, CIs de grande escala etc.) devem ser colocados a jusante do fluxo de ar.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Space_layout_strategy\"><\/span>Estrat\u00e9gia de layout do espa\u00e7o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Dire\u00e7\u00e3o horizontal:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Os dispositivos de alta pot\u00eancia devem ser dispostos pr\u00f3ximos \u00e0 borda da placa de circuito impresso para encurtar o caminho de condu\u00e7\u00e3o de calor<br>(2) Dire\u00e7\u00e3o vertical:<\/li>\n\n\n\n<li>Recomenda-se que os dispositivos de alta pot\u00eancia sejam colocados na \u00e1rea superior da placa de circuito impresso para reduzir o impacto t\u00e9rmico em outros componentes.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Airflow_channel_design\"><\/span>Projeto do canal de fluxo de ar<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) para evitar a forma\u00e7\u00e3o de zonas mortas de fluxo de ar na placa de circuito impresso e garantir uma circula\u00e7\u00e3o de ar suave<br>(2) O sistema de v\u00e1rias placas precisa ser considerado na distribui\u00e7\u00e3o geral do fluxo de ar<br>(3) Preste aten\u00e7\u00e3o \u00e0s caracter\u00edsticas do fluxo de ar, escolha naturalmente um caminho de baixa resist\u00eancia e uma configura\u00e7\u00e3o razo\u00e1vel da densidade do componente<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Protection_of_heat-sensitive_components\"><\/span>Prote\u00e7\u00e3o de componentes sens\u00edveis ao calor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Os dispositivos sens\u00edveis \u00e0 temperatura devem ser colocados em \u00e1reas de baixa temperatura (como a parte inferior do equipamento)<br>(2) Proibir estritamente a disposi\u00e7\u00e3o de dispositivos sens\u00edveis no elemento de aquecimento diretamente acima do<br>(3) Recomenda-se o uso de um layout horizontal escalonado<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-power_components_to_deal_with\"><\/span>Componentes de alta pot\u00eancia para lidar com<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) A principal fonte de calor ser\u00e1 disposta no melhor local para dissipa\u00e7\u00e3o de calor<br>(2) Evite colocar dispositivos de alto aquecimento nos cantos da placa (sem dissipa\u00e7\u00e3o de calor auxiliar)<br>(3) Os resistores de pot\u00eancia devem ser embalados em pacotes maiores com espa\u00e7o suficiente para dissipa\u00e7\u00e3o de calor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_balance_design\"><\/span>Projeto de equil\u00edbrio t\u00e9rmico<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Evitar a agrega\u00e7\u00e3o t\u00e9rmica localizada<br>(2) Tente distribuir uniformemente os dispositivos de energia<br>(3) para manter a uniformidade do campo de temperatura da superf\u00edcie da placa de circuito impresso<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wiring_thermal_optimization\"><\/span>Otimiza\u00e7\u00e3o t\u00e9rmica da fia\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Fa\u00e7a uso total da condutividade t\u00e9rmica da folha de cobre<br>(2) Melhorar a cobertura da folha de cobre na camada de fia\u00e7\u00e3o<br>(3) Configurar razoavelmente a condutividade t\u00e9rmica da matriz de orif\u00edcios<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Efficient_Heat_Dissipation_Solution\"><\/span>4. Solu\u00e7\u00e3o eficiente de dissipa\u00e7\u00e3o de calor<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>Solu\u00e7\u00e3o de dissipa\u00e7\u00e3o de calor localizada (aplic\u00e1vel a menos de 3 dispositivos geradores de calor)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Configura\u00e7\u00e3o b\u00e1sica de dissipa\u00e7\u00e3o de calor:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Instala\u00e7\u00e3o de dissipadores de calor separados para dispositivos de alta gera\u00e7\u00e3o de calor<\/li>\n\n\n\n<li>Uso de tubos de calor para aumentar a efici\u00eancia da condu\u00e7\u00e3o de calor<br>(2) Programa aprimorado de dissipa\u00e7\u00e3o de calor:<\/li>\n\n\n\n<li>Quando a dissipa\u00e7\u00e3o de calor passiva \u00e9 insuficiente<\/li>\n\n\n\n<li>Adicione uma combina\u00e7\u00e3o de resfriador com ventilador ativo<\/li>\n\n\n\n<li>Aumenta a efici\u00eancia da dissipa\u00e7\u00e3o de calor em 30 a 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>Programa geral de dissipa\u00e7\u00e3o de calor (aplic\u00e1vel a mais de tr\u00eas dispositivos geradores de calor)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(1) Solu\u00e7\u00e3o t\u00e9rmica personalizada:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Personalize o dissipador de calor geral de acordo com o layout do dispositivo<\/li>\n\n\n\n<li>Correspond\u00eancia precisa da altura e posi\u00e7\u00e3o dos componentes<\/li>\n\n\n\n<li>Usinagem CNC para garantir a precis\u00e3o do contato<br>(2) Medidas de otimiza\u00e7\u00e3o do desempenho:<\/li>\n\n\n\n<li>Instala\u00e7\u00e3o de espa\u00e7adores flex\u00edveis de material de mudan\u00e7a de fase termicamente condutor<\/li>\n\n\n\n<li>Compensar a toler\u00e2ncia de altura de soldagem de componentes<\/li>\n\n\n\n<li>Melhore a condutividade t\u00e9rmica da superf\u00edcie de contato em 60%.<br>(3) Cuidado:<\/li>\n\n\n\n<li>Considere a resist\u00eancia estrutural geral<\/li>\n\n\n\n<li>Reserve um espa\u00e7o adequado para a expans\u00e3o t\u00e9rmica<\/li>\n\n\n\n<li>Preste aten\u00e7\u00e3o ao design do canal de fluxo de ar<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mixed_heat_dissipation_strategy\"><\/span>Estrat\u00e9gia mista de dissipa\u00e7\u00e3o de calor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Combine as vantagens da dissipa\u00e7\u00e3o de calor local e geral<\/li>\n\n\n\n<li>Dissipa\u00e7\u00e3o dupla de calor para componentes cr\u00edticos que geram calor<\/li>\n\n\n\n<li>Otimize o desempenho t\u00e9rmico em n\u00edvel de sistema<br>Observa\u00e7\u00e3o: na pr\u00e1tica, \u00e9 necess\u00e1rio escolher a combina\u00e7\u00e3o certa de solu\u00e7\u00f5es t\u00e9rmicas de acordo com a carga t\u00e9rmica espec\u00edfica, as restri\u00e7\u00f5es de espa\u00e7o e o or\u00e7amento de custos.<\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Um bom projeto t\u00e9rmico para placas de circuito impresso \u00e9 fundamental, pois est\u00e1 diretamente relacionado \u00e0 opera\u00e7\u00e3o est\u00e1vel de equipamentos eletr\u00f4nicos e \u00e0 confiabilidade de longo prazo. Portanto, na pr\u00e1tica<\/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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