{"id":21505,"date":"2026-08-19T20:37:16","date_gmt":"2026-08-19T12:37:16","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=21505"},"modified":"2026-08-20T15:35:29","modified_gmt":"2026-08-20T07:35:29","slug":"smps-what-it-is-and-how-it-works","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/pt\/smps-what-it-is-and-how-it-works\/","title":{"rendered":"SMPS: O que \u00e9 e como funciona"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"21505\" class=\"elementor elementor-21505\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35ab4e8 e-flex e-con-boxed e-con e-parent\" data-id=\"35ab4e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-975f063 elementor-widget elementor-widget-text-editor\" data-id=\"975f063\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">SMPS \u00e9 a sigla para \u201cSwitched-Mode Power Supply\u201d (fonte de alimenta\u00e7\u00e3o comutada), amplamente utilizada em aplica\u00e7\u00f5es de controle industrial para alimentar cargas de corrente cont\u00ednua (CC). Ela \u00e9 capaz de converter com efic\u00e1cia a tens\u00e3o de corrente alternada (CA) em tens\u00e3o de corrente cont\u00ednua (CC).<\/span><\/p><p><span style=\"font-weight: 400;\">As fontes de alimenta\u00e7\u00e3o de comuta\u00e7\u00e3o s\u00e3o uma das <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/top-10-most-commonly-used-components-in-industrial-automation\/\"><span style=\"font-weight: 400;\">Os 10 componentes mais utilizados na automa\u00e7\u00e3o industrial<\/span><\/a><\/span><span style=\"font-weight: 400;\">, fornecendo energia a diversos dispositivos, como PLCs, sensores de temperatura, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/sensores-de-proximidade\/\"><span style=\"font-weight: 400;\">sensores de proximidade<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/safety-light-curtain-sensor\/\"><span style=\"font-weight: 400;\">cortinas de luz de seguran\u00e7a<\/span><\/a><\/span><span style=\"font-weight: 400;\">, luzes indicadoras, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/what-is-a-temperature-transmitter-a-comprehensive-explanation\/\"><span style=\"font-weight: 400;\">transmissores de temperatura<\/span><\/a><\/span><span style=\"font-weight: 400;\">, v\u00e1lvulas solen\u00f3ides, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/tcx5-universal-pid-temperature-controller\/\"><span style=\"font-weight: 400;\">controladores de temperatura<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/reles-de-estado-solido\/\"><span style=\"font-weight: 400;\">rel\u00e9s de estado s\u00f3lido<\/span><\/a><\/span><span style=\"font-weight: 400;\"> e v\u00e1rias fitas de LED.<\/span><\/p><p><span style=\"font-weight: 400;\">Nesta postagem do blog, voc\u00ea aprender\u00e1:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">O que \u00e9 uma SMPS?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Como funciona.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Que cargas ele consegue transportar?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tipos de SMPS.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Guia de sele\u00e7\u00e3o de SMPS.<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Agora, vamos nos aprofundar no assunto.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bdb9995 elementor-widget elementor-widget-heading\" data-id=\"bdb9995\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">O que \u00e9 uma SMPS?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6db8ba elementor-widget elementor-widget-text-editor\" data-id=\"d6db8ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Em resumo, uma fonte de alimenta\u00e7\u00e3o comutada (SMPS) \u00e9 um conversor de tens\u00e3o que transforma a tens\u00e3o de corrente alternada (CA) em um valor fixo de tens\u00e3o de corrente cont\u00ednua (CC). Portanto, adaptadores de laptop, carregadores de celular e drivers de LED podem ser considerados fontes de alimenta\u00e7\u00e3o comutadas.<\/span><\/p><p><span style=\"font-weight: 400;\">Sua tens\u00e3o de entrada pode ser CA monof\u00e1sica de 110 V, 220 V ou CA trif\u00e1sica de 380 V. Essas tens\u00f5es de entrada s\u00e3o convertidas em CC de 5 V, 12 V, 24 V ou 48 V por meio dos circuitos internos da fonte de alimenta\u00e7\u00e3o comutada (SMPS), de acordo com o projeto do produto.<\/span><\/p><p><span style=\"font-weight: 400;\">Na pr\u00f3xima se\u00e7\u00e3o, explicaremos detalhadamente o princ\u00edpio de funcionamento de uma fonte de alimenta\u00e7\u00e3o comutada.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9f35b72 elementor-widget elementor-widget-heading\" data-id=\"9f35b72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Como funciona uma fonte de alimenta\u00e7\u00e3o comutada (SMPS)?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a2179d1 elementor-widget elementor-widget-image\" data-id=\"a2179d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram.jpg\" class=\"attachment-large size-large wp-image-21529\" alt=\"AC220V input DC24V output switched-mode power supply circuit diagram\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-600x300.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b037a49 elementor-widget elementor-widget-text-editor\" data-id=\"b037a49\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">O fluxo de trabalho da SMPS consiste em 6 etapas: alimenta\u00e7\u00e3o da rede CA \u2192 filtro EMI \u2192 ponte retificadora + capacitor eletrol\u00edtico (barramento de 310 V CC ou 150 V CC) \u2192 chave PWM + transformador de alta frequ\u00eancia \u2192 retifica\u00e7\u00e3o e filtragem do lado secund\u00e1rio \u2192 sa\u00edda de tens\u00e3o CC est\u00e1vel.<\/span><\/p><p><span style=\"font-weight: 400;\">Vamos examinar cada etapa mais detalhadamente.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5b7a0b3 elementor-widget elementor-widget-heading\" data-id=\"5b7a0b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Entrada de alimenta\u00e7\u00e3o da rede el\u00e9trica CA<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef133e5 elementor-widget elementor-widget-text-editor\" data-id=\"ef133e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Precisamos conectar 110 V CA, 220 V CA ou 380 V CA aos terminais de entrada da fonte de alimenta\u00e7\u00e3o comutada.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45282ec elementor-widget elementor-widget-heading\" data-id=\"45282ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Filtro EMI<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30986a8 elementor-widget elementor-widget-text-editor\" data-id=\"30986a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Nesta etapa, a tens\u00e3o CA ser\u00e1 filtrada para se obter uma fonte de alimenta\u00e7\u00e3o CA limpa, enquanto outros sinais de interfer\u00eancia (como ru\u00eddos eletromagn\u00e9ticos de alta frequ\u00eancia) ser\u00e3o filtrados e absorvidos.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0c9307 elementor-widget elementor-widget-heading\" data-id=\"a0c9307\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Ponte retificadora + capacitor eletrol\u00edtico (barramento de 310 V CC ou 150 V CC)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c3e1117 elementor-widget elementor-widget-image\" data-id=\"c3e1117\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers.jpg\" class=\"attachment-large size-large wp-image-21497\" alt=\"Forma de onda de sa\u00edda atrav\u00e9s de retificadores em ponte\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f22f8f elementor-widget elementor-widget-text-editor\" data-id=\"3f22f8f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Nesta se\u00e7\u00e3o, a tens\u00e3o de entrada \u00e9 de 220 V CA (Observa\u00e7\u00e3o: a tens\u00e3o mencionada aqui \u00e9 de 220 V CA, o valor RMS da rede el\u00e9trica. Seu valor de pico \u00e9 220 \u00d7 \u221a2 = 310 V.). Essa tens\u00e3o CA \u00e9 convertida em 310 V CC.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5849b25 elementor-widget elementor-widget-image\" data-id=\"5849b25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor.jpg\" class=\"attachment-large size-large wp-image-21495\" alt=\"Forma de onda de sa\u00edda atrav\u00e9s do capacitor\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab6548c elementor-widget elementor-widget-text-editor\" data-id=\"ab6548c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">A forma de onda em quest\u00e3o \u00e9 dividida em duas etapas, conforme mostrado e descrito a seguir:<\/span><\/p><ol><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A corrente alternada passa por um retificador em ponte completa, convertendo a corrente alternada positiva e negativa em corrente cont\u00ednua pulsante unidirecional;<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ap\u00f3s a filtragem por um capacitor eletrol\u00edtico de grande capacidade, obt\u00e9m-se uma corrente cont\u00ednua de alta tens\u00e3o, de 310 V, sem oscila\u00e7\u00f5es.<\/span><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c122e0 elementor-widget elementor-widget-heading\" data-id=\"0c122e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Chave PWM + transformador de alta frequ\u00eancia<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0ec2415 elementor-widget elementor-widget-image\" data-id=\"0ec2415\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET.jpg\" class=\"attachment-large size-large wp-image-21500\" alt=\"Forma de onda de sa\u00edda por meio de um MOSFET de alta frequ\u00eancia\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7244e4a elementor-widget elementor-widget-text-editor\" data-id=\"7244e4a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Agora temos 310 V CC. Essa n\u00e3o \u00e9 a tens\u00e3o de sa\u00edda desejada, por isso precisamos de um transformador para reduzir a tens\u00e3o para 12 V, 24 V ou 5 V CC.<\/span><\/p><p><span style=\"font-weight: 400;\">No entanto, nenhum transformador \u00e9 capaz de converter diretamente corrente cont\u00ednua est\u00e1vel. Isso ocorre porque a corrente cont\u00ednua gera um fluxo est\u00e1tico no interior do transformador, impedindo que seja induzida tens\u00e3o no lado secund\u00e1rio para a transforma\u00e7\u00e3o de tens\u00e3o.<\/span><\/p><p><span style=\"font-weight: 400;\">Como resolver esse problema?<\/span><\/p><p><span style=\"font-weight: 400;\">A solu\u00e7\u00e3o consiste em utilizar um MOSFET de alta frequ\u00eancia para converter a corrente cont\u00ednua est\u00e1tica em pulsos de corrente cont\u00ednua de alta frequ\u00eancia; voc\u00ea pode observar esses pulsos de corrente cont\u00ednua a seguir:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0143d0f elementor-widget elementor-widget-image\" data-id=\"0143d0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer.jpg\" class=\"attachment-large size-large wp-image-21503\" alt=\"Forma de onda de sa\u00edda atrav\u00e9s do transformador\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f25083 elementor-widget elementor-widget-text-editor\" data-id=\"2f25083\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Com esse m\u00e9todo, \u00e9 poss\u00edvel converter alta tens\u00e3o CC em baixa tens\u00e3o. No entanto, os pulsos alternados do transformador precisam ser convertidos em corrente cont\u00ednua positiva unidirecional.<\/span><\/p><p><span style=\"font-weight: 400;\">Agora passamos para a pr\u00f3xima etapa: retifica\u00e7\u00e3o e filtragem no lado secund\u00e1rio.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f032159 elementor-widget elementor-widget-heading\" data-id=\"f032159\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">5. Retifica\u00e7\u00e3o e filtragem do lado secund\u00e1rio<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19eeb9e elementor-widget elementor-widget-text-editor\" data-id=\"19eeb9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Este circuito permite que a tens\u00e3o seja convertida de uma onda quadrada de alta tens\u00e3o (310 VCC) para uma onda quadrada de baixa tens\u00e3o (5 VCC, 12 VCC ou 24 VCC).<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8a1aa9 elementor-widget elementor-widget-image\" data-id=\"b8a1aa9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side.jpg\" class=\"attachment-large size-large wp-image-21501\" alt=\"Forma de onda de sa\u00edda pelo lado secund\u00e1rio do transformador\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36dd1c0 elementor-widget elementor-widget-text-editor\" data-id=\"36dd1c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">O pr\u00f3ximo passo \u00e9 converter o semiciclo negativo da onda quadrada no semiciclo positivo, de modo que toda a sa\u00edda se torne uma tens\u00e3o cont\u00ednua. Isso pode ser feito utilizando outro circuito retificador.<\/span><\/p><p><span style=\"font-weight: 400;\">Ap\u00f3s filtrar outros ru\u00eddos, a sa\u00edda ser\u00e1 uma tens\u00e3o cont\u00ednua baixa e est\u00e1vel.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c753d2 elementor-widget elementor-widget-image\" data-id=\"2c753d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter.jpg\" class=\"attachment-large size-large wp-image-21504\" alt=\"Forma de onda de sa\u00edda atrav\u00e9s do transformador, passando pelo retificador em ponte final e pelo filtro\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-066a502 elementor-widget elementor-widget-heading\" data-id=\"066a502\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Tipos de SMPS<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d26436d elementor-widget elementor-widget-text-editor\" data-id=\"d26436d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Com base em nossa experi\u00eancia, as fontes de alimenta\u00e7\u00e3o comutadas podem ser divididas, basicamente, em tr\u00eas tipos: fontes de alimenta\u00e7\u00e3o comutadas com sa\u00edda vari\u00e1vel, fontes de alimenta\u00e7\u00e3o comutadas para montagem em trilho DIN e fontes de alimenta\u00e7\u00e3o comutadas padr\u00e3o para montagem com parafusos. Apresentaremos cada um deles na pr\u00f3xima se\u00e7\u00e3o.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90e7e42 elementor-widget elementor-widget-heading\" data-id=\"90e7e42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fonte de alimenta\u00e7\u00e3o comutada (SMPS) de sa\u00edda vari\u00e1vel<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2823569 elementor-widget elementor-widget-image\" data-id=\"2823569\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS.jpg\" class=\"attachment-large size-large wp-image-21499\" alt=\"Fonte de alimenta\u00e7\u00e3o comutada (SMPS) de sa\u00edda vari\u00e1vel\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2602832 elementor-widget elementor-widget-text-editor\" data-id=\"2602832\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">As fontes de alimenta\u00e7\u00e3o comutadas (SMPS) de sa\u00edda vari\u00e1vel, tamb\u00e9m conhecidas como fontes de alimenta\u00e7\u00e3o CC vari\u00e1veis, permitem obter a tens\u00e3o CC desejada ajustando um bot\u00e3o no produto.<\/span><\/p><p><span style=\"font-weight: 400;\">Sua caracter\u00edstica de sa\u00edda de corrente cont\u00ednua vari\u00e1vel facilita aos usu\u00e1rios a obten\u00e7\u00e3o da tens\u00e3o necess\u00e1ria; no entanto, por esse motivo, seu pre\u00e7o \u00e9 muito mais alto do que o dos dois tipos de fontes de alimenta\u00e7\u00e3o comutadas que apresentaremos a seguir.<\/span><\/p><p><span style=\"font-weight: 400;\">Portanto, as fontes de alimenta\u00e7\u00e3o comutadas de sa\u00edda vari\u00e1vel s\u00e3o utilizadas principalmente em laborat\u00f3rios e equipamentos de teste, sendo raramente encontradas em linhas de produ\u00e7\u00e3o reais.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af025a5 elementor-widget elementor-widget-heading\" data-id=\"af025a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fonte de alimenta\u00e7\u00e3o com r\u00e9gua DIN<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ff864e elementor-widget elementor-widget-image\" data-id=\"8ff864e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS.jpg\" class=\"attachment-large size-large wp-image-21496\" alt=\"Fonte de alimenta\u00e7\u00e3o com r\u00e9gua DIN\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b3667b1 elementor-widget elementor-widget-text-editor\" data-id=\"b3667b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">As fontes de alimenta\u00e7\u00e3o comutadas para montagem em trilho DIN possuem uma estrutura de montagem em trilho DIN na parte traseira, permitindo que os usu\u00e1rios as instalem facilmente em trilhos DIN de 35 mm.<\/span><\/p><p><span style=\"font-weight: 400;\">Entre eles, os modelos mais populares incluem a s\u00e9rie DR e a s\u00e9rie NDR.<\/span><\/p><p><span style=\"font-weight: 400;\">Comparando as duas s\u00e9ries de fontes de alimenta\u00e7\u00e3o comutadas com a mesma pot\u00eancia de sa\u00edda, a s\u00e9rie NDR \u00e9 mais fina do que a s\u00e9rie DR.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8227a94 elementor-widget elementor-widget-heading\" data-id=\"8227a94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">SMPS fixado com parafusos<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a9ef32 elementor-widget elementor-widget-image\" data-id=\"4a9ef32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS.jpg\" class=\"attachment-large size-large wp-image-21498\" alt=\"SMPS fixado com parafusos\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cdbb487 elementor-widget elementor-widget-text-editor\" data-id=\"cdbb487\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Outro tipo de fonte de alimenta\u00e7\u00e3o comutada mais comumente utilizado \u00e9 a fonte de alimenta\u00e7\u00e3o comutada com fixa\u00e7\u00e3o por parafusos, assim chamada devido ao seu m\u00e9todo de fixa\u00e7\u00e3o por parafusos.<\/span><\/p><p><span style=\"font-weight: 400;\">As fontes de alimenta\u00e7\u00e3o comutadas montadas com parafusos incluem as s\u00e9ries S, D, SP e MS. Clique neste link para baixar nosso cat\u00e1logo de produtos de fontes de alimenta\u00e7\u00e3o comutadas: <\/span><a href=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switching-Mode-Power-Supply-Catalog.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #ff0000;\"><b>Cat\u00e1logo de produtos de fontes de alimenta\u00e7\u00e3o com chaveamento da Lorentzzi<\/b><\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">As fontes de alimenta\u00e7\u00e3o com chaveamento montadas com parafusos s\u00e3o comumente encontradas em sistemas de controle de ilumina\u00e7\u00e3o LED, sendo utilizadas para alimentar fitas de LED, postes de ilumina\u00e7\u00e3o p\u00fablica etc.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3191541 elementor-widget elementor-widget-heading\" data-id=\"3191541\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Quais dispositivos podem ser operados pela SMPS?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-206ec88 elementor-widget elementor-widget-text-editor\" data-id=\"206ec88\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">As fontes de alimenta\u00e7\u00e3o comutadas (SMPS) alimentam uma ampla variedade de dispositivos eletr\u00f4nicos de corrente cont\u00ednua, incluindo:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce74d07 elementor-widget elementor-widget-heading\" data-id=\"ce74d07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Equipamentos de automa\u00e7\u00e3o industrial<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b93a8de elementor-widget elementor-widget-text-editor\" data-id=\"b93a8de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Por exemplo, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/sensores-de-proximidade\/\"><span style=\"font-weight: 400;\">v\u00e1rios sensores de proximidade<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/safety-light-curtain-sensor\/\"><span style=\"font-weight: 400;\">cortinas de luz de seguran\u00e7a<\/span><\/a><\/span><span style=\"font-weight: 400;\">, PLCs, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/general-purpose-relay-what-is-it-and-how-does-it-work\/\"><span style=\"font-weight: 400;\">rel\u00e9s de uso geral (rel\u00e9s intermedi\u00e1rios)<\/span><\/a><\/span><span style=\"font-weight: 400;\">, v\u00e1lvulas solen\u00f3ides, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/products\/accessories\/cjx2-contactor\/\"><span style=\"font-weight: 400;\">Contatores de bobina de corrente cont\u00ednua<\/span><\/a><\/span><span style=\"font-weight: 400;\">, m\u00f3dulos de servocontrole e IHMs de corrente cont\u00ednua.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18b5fb5 elementor-widget elementor-widget-heading\" data-id=\"18b5fb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Ilumina\u00e7\u00e3o<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9fe61a3 elementor-widget elementor-widget-image\" data-id=\"9fe61a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies.jpg\" class=\"attachment-large size-large wp-image-21502\" alt=\"As fitas de LED que podem ser operadas por fontes de alimenta\u00e7\u00e3o com chaveamento\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e28df8d elementor-widget elementor-widget-text-editor\" data-id=\"e28df8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Fitas de LED e lumin\u00e1rias de LED de tens\u00e3o constante.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eb32c16 elementor-widget elementor-widget-heading\" data-id=\"eb32c16\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Hardware de comunica\u00e7\u00e3o e rede<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a195e1c elementor-widget elementor-widget-text-editor\" data-id=\"a195e1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Roteadores, switches, CFTV e equipamentos terminais de rede.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6210e33 elementor-widget elementor-widget-heading\" data-id=\"6210e33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Eletr\u00f4nicos de consumo e comerciais<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e39cdd3 elementor-widget elementor-widget-text-editor\" data-id=\"e39cdd3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Carregador de bateria, carregador de celular, adaptadores para laptop e assim por diante.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-993c680 elementor-widget elementor-widget-heading\" data-id=\"993c680\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Como escolher a fonte de alimenta\u00e7\u00e3o comutada (SMPS) certa para a sua aplica\u00e7\u00e3o?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f6db2c elementor-widget elementor-widget-text-editor\" data-id=\"8f6db2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Escolher a fonte de alimenta\u00e7\u00e3o comutada adequada para a sua carga pode evitar muitos problemas.<\/span><\/p><p><span style=\"font-weight: 400;\">Em termos simples, a escolha da fonte de alimenta\u00e7\u00e3o comutada adequada pode ser dividida em quatro etapas: 1. Verificar a pot\u00eancia nominal da carga; 2. Verificar a tens\u00e3o nominal da carga; 3. Deixar uma margem de seguran\u00e7a para a carga; 4. Verificar o m\u00e9todo de instala\u00e7\u00e3o.<\/span><\/p><p><span style=\"font-weight: 400;\">Na se\u00e7\u00e3o a seguir, vamos ensinar voc\u00ea passo a passo.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78e1691 elementor-widget elementor-widget-heading\" data-id=\"78e1691\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Confirme a pot\u00eancia nominal da carga<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85635c0 elementor-widget elementor-widget-text-editor\" data-id=\"85635c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">\u00c9 poss\u00edvel determinar a pot\u00eancia nominal de uma carga de corrente cont\u00ednua (CC) consultando a placa de identifica\u00e7\u00e3o; caso voc\u00ea n\u00e3o saiba, podemos fornecer algumas informa\u00e7\u00f5es: para a maioria dos sensores, a pot\u00eancia nominal costuma ser inferior a 10 W; para cargas capacitivas, como v\u00e1lvulas solen\u00f3ides, a pot\u00eancia nominal costuma ser inferior a 30 W, mas sua pot\u00eancia de partida costuma ser de 2 a 3 vezes a pot\u00eancia nominal; portanto, \u00e9 melhor usar uma fonte de alimenta\u00e7\u00e3o comutada de 100 W.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d24ee99 elementor-widget elementor-widget-heading\" data-id=\"d24ee99\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Confirme a tens\u00e3o nominal da carga<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-edbbd91 elementor-widget elementor-widget-text-editor\" data-id=\"edbbd91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Voc\u00ea tamb\u00e9m pode determinar a tens\u00e3o nominal da carga consultando a placa de identifica\u00e7\u00e3o. Por exemplo, se a sua carga for de 24 VCC, voc\u00ea deve selecionar uma fonte de alimenta\u00e7\u00e3o comutada com sa\u00edda de 24 VCC.<\/span><\/p><p><span style=\"font-weight: 400;\">A escolha de uma tens\u00e3o de sa\u00edda incorreta pode fazer com que as bobinas da sua carga de corrente cont\u00ednua superaque\u00e7am e queimem.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8ad6b1 elementor-widget elementor-widget-heading\" data-id=\"c8ad6b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Deixe uma margem para a carga<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-edf2dac elementor-widget elementor-widget-text-editor\" data-id=\"edf2dac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Para cargas est\u00e1veis e n\u00e3o indutivas (sensores, cortinas de luz de seguran\u00e7a, controladores de temperatura): reserve uma margem de pot\u00eancia de 20%~30%.<\/span><\/p><p><span style=\"font-weight: 400;\">Para cargas indutivas (v\u00e1lvulas solen\u00f3ides, rel\u00e9s): Reserve uma margem de pot\u00eancia de 40%~50%<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d76004 elementor-widget elementor-widget-heading\" data-id=\"4d76004\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Confirme o m\u00e9todo de instala\u00e7\u00e3o<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d100bbb elementor-widget elementor-widget-text-editor\" data-id=\"d100bbb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Por fim, confirme seu plano para a instala\u00e7\u00e3o da fonte de alimenta\u00e7\u00e3o SMPS no rack.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Se voc\u00ea deseja uma instala\u00e7\u00e3o r\u00e1pida e f\u00e1cil, opte por uma fonte de alimenta\u00e7\u00e3o SMPS com trilho DIN; se o seu rack n\u00e3o tiver trilhos DIN, opte por uma fonte de alimenta\u00e7\u00e3o SMPS com fixa\u00e7\u00e3o por parafusos e prenda-a firmemente no rack usando quatro parafusos.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb526c6 elementor-widget elementor-widget-heading\" data-id=\"bb526c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclus\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42c0e5a elementor-widget elementor-widget-image\" data-id=\"42c0e5a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijg4MzMiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action.jpg\" class=\"attachment-large size-large wp-image-21521\" alt=\"Lorentzzi Switched-Mode Power Supply Call to Action\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-600x300.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11ce10e elementor-widget elementor-widget-text-editor\" data-id=\"11ce10e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Em resumo, as fontes de alimenta\u00e7\u00e3o comutadas s\u00e3o amplamente utilizadas no controle industrial, permitindo que forne\u00e7am energia CC est\u00e1vel a cargas CC a partir de energia CA.<\/span><\/p><p><span style=\"font-weight: 400;\">Se voc\u00ea ainda tiver d\u00favidas sobre fontes de alimenta\u00e7\u00e3o comutadas (SMPS) ou estiver procurando um fornecedor chin\u00eas capaz de produzir fontes de alimenta\u00e7\u00e3o comutadas de alta qualidade, pode enviar suas perguntas ou solicita\u00e7\u00f5es para <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"mailto:shonxu@lorentzzi.com\"><span style=\"font-weight: 400;\">shonxu@lorentzzi.com<\/span><\/a><\/span><span style=\"font-weight: 400;\">, e o departamento de vendas da <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/pt\/\"><b>Lorentzzi Electric<\/b><\/a><\/span><span style=\"font-weight: 400;\"> Entraremos em contato com voc\u00ea em breve.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>SMPS is an abbreviation for Switched-Mode Power Supply, widely used in industrial control applications to drive DC loads. It can effectively convert alternating current (AC) voltage to direct current (DC) voltage. Switching power supplies are one of the top 10 commonly used components in industrial automation, providing power to various devices such as PLCs, temperature [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21494,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[110],"tags":[],"class_list":["post-21505","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sensor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>SMPS: What It Is and How It Works<\/title>\n<meta name=\"description\" content=\"In this blog post, we will introduce the definition, working principle, types, and selection guidelines of SMPS. 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