{"id":6695,"date":"2025-05-23T08:30:00","date_gmt":"2025-05-23T00:30:00","guid":{"rendered":"https:\/\/topfastpcba.com\/?p=6695"},"modified":"2025-10-22T17:08:57","modified_gmt":"2025-10-22T09:08:57","slug":"how-to-test-smd-inductor","status":"publish","type":"post","link":"https:\/\/topfastpcba.com\/fr\/how-to-test-smd-inductor\/","title":{"rendered":"Comment tester un inducteur SMD ?"},"content":{"rendered":"<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\/how-to-test-smd-inductor\/#Comprehensive_Guide_to_Testing_SMD_Inductors\" >Guide complet pour le test des inducteurs CMS<\/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\/how-to-test-smd-inductor\/#I_Testing_Principles_and_Importance\" >I. Principes et importance des tests<\/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\/how-to-test-smd-inductor\/#II_Instrument_Selection_Guide\" >II.Guide de s\u00e9lection des instruments<\/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\/how-to-test-smd-inductor\/#III_Standardized_Testing_Procedure\" >III.Proc\u00e9dure de test standardis\u00e9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topfastpcba.com\/fr\/how-to-test-smd-inductor\/#IV_Advanced_Testing_Techniques\" >IV.Techniques d'essai avanc\u00e9es<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topfastpcba.com\/fr\/how-to-test-smd-inductor\/#V_Troubleshooting_Guide\" >V.Guide de d\u00e9pannage<\/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\/how-to-test-smd-inductor\/#VI_Test_Report_Template\" >VI.Mod\u00e8le de rapport d'essai<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Comprehensive_Guide_to_Testing_SMD_Inductors\"><\/span>Guide complet pour le test des inducteurs CMS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"I_Testing_Principles_and_Importance\"><\/span>I. Principes et importance des tests<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Principes de base <a href=\"https:\/\/topfastpcba.com\/fr\/what-is-an-inductor\/\">Inducteur<\/a> Essais<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Based on the AC impedance method: L=XL\/(2\u03c0f), where XL is inductive reactance and f is the test frequency<\/li>\n\n\n\n<li>Quality factor Q reflects energy storage efficiency: Q=2\u03c0fL\/R<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Analyse des sources d'erreur<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Effets parasites (capacit\u00e9 distribu\u00e9e typique de 0,1 \u00e0 0,5 pF)<\/li>\n\n\n\n<li>Contact resistance (should be &lt;50m\u03a9)<\/li>\n\n\n\n<li>Interf\u00e9rences environnementales (salle blind\u00e9e recommand\u00e9e pour les tests \u00e0 haute fr\u00e9quence)<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor-2.jpg\" alt=\"Inducteur SMD\" class=\"wp-image-6697\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor-2.jpg 600w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor-2-300x201.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor-2-150x101.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"II_Instrument_Selection_Guide\"><\/span>II.Guide de s\u00e9lection des instruments<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Tableau comparatif des principaux instruments<\/strong> <\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Cat\u00e9gorie d'instrument<\/th><th>Plage de mesure<\/th><th>Pr\u00e9cision de base<\/th><th>Gamme de fr\u00e9quences<\/th><th>Applications cl\u00e9s<\/th><th>Mod\u00e8les standard de l'industrie<\/th><\/tr><\/thead><tbody><tr><td>Mesureur LCR de pr\u00e9cision<\/td><td>1nH &amp;#8211 ; 100H<\/td><td>\u00b10.1% basic<\/td><td>20Hz &amp;#8211 ; 300kHz<\/td><td>Filtres d'alimentation, convertisseurs DC-DC<\/td><td>Keysight E4980A, Hioki IM3536<\/td><\/tr><tr><td>Mesureur RF LCR<\/td><td>0,1nH &amp;#8211 ; 1kH<\/td><td>\u00b10.05%<\/td><td>1kHz &amp;#8211 ; 30MHz<\/td><td>R\u00e9seaux d'adaptation RF, circuits HF<\/td><td>GW Instek LCR-800G, Wayne Kerr 6500B<\/td><\/tr><tr><td>Analyseur de r\u00e9seau vectoriel<\/td><td>0,01nH &amp;#8211 ; 10H<\/td><td>\u00b10.02dB magnitude<\/td><td>100kHz &amp;#8211 ; 20GHz<\/td><td>Composants hyperfr\u00e9quences, Syst\u00e8mes d'antennes<\/td><td>R&amp;S ZNB20, Keysight PNA<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>    2.<strong>Arbre de d\u00e9cision pour la s\u00e9lection<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"731\" height=\"329\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Selection-Decision-Tree.jpg\" alt=\"\" class=\"wp-image-6696\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Selection-Decision-Tree.jpg 731w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Selection-Decision-Tree-300x135.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Selection-Decision-Tree-150x68.jpg 150w\" sizes=\"auto, (max-width: 731px) 100vw, 731px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"III_Standardized_Testing_Procedure\"><\/span>III.Proc\u00e9dure de test standardis\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Phase de pr\u00e9paration<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Traitement de la surface de contact :<\/li>\n\n\n\n<li>Nettoyage par ultrasons avec de l'isopropanol (3 minutes)<\/li>\n\n\n\n<li>Nettoyage au plasma pour l'oxydation s\u00e9v\u00e8re (50W, 2 minutes)<\/li>\n\n\n\n<li>Contr\u00f4le de l'environnement :<\/li>\n\n\n\n<li>Temperature 23\u00b11\u2103 (30 min thermal stabilization)<\/li>\n\n\n\n<li>Humidit\u00e9 &lt;45% RH<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u00c9tapes d\u00e9taill\u00e9es de l'op\u00e9ration<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exemple pour un inducteur en bo\u00eetier 0402 :<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Choisir un dispositif d'essai triaxial (par exemple, Cascade Microtech ACP40)<\/li>\n\n\n\n<li>D\u00e9finir les conditions de test :<br><code>freq = [100kHz, 1MHz, 10MHz] bias = [0mA, 10mA]<\/code><\/li>\n\n\n\n<li>Compensation de la r\u00e9sistance de contact (m\u00e9thode \u00e0 4 fils)<\/li>\n\n\n\n<li><strong>Normes d'acquisition de donn\u00e9es<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sampling: \u226516 averages<\/li>\n\n\n\n<li>Crit\u00e8re de stabilit\u00e9 : &lt;0,5% de variation sur 3 lectures cons\u00e9cutives<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"IV_Advanced_Testing_Techniques\"><\/span>IV.Techniques d'essai avanc\u00e9es<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Caract\u00e9risation de la temp\u00e9rature<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Setup: Thermal chamber (-55\u2103~+150\u2103)<\/li>\n\n\n\n<li>Param\u00e8tres cl\u00e9s :<\/li>\n\n\n\n<li>Temperature coefficient TC=\u0394L\/(L0\u00d7\u0394T)<\/li>\n\n\n\n<li>Typical value: \u00b130ppm\/\u2103 (ferrite materials)<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Caract\u00e9risation de la polarisation en courant continu<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Configuration : Source de courant programmable (0- 10A)<\/li>\n\n\n\n<li>Analyse des courbes :<\/li>\n\n\n\n<li>Courant de saturation Isat (courant \u00e0 10% de chute L)<\/li>\n\n\n\n<li>D\u00e9gradation de la perm\u00e9abilit\u00e9<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Test des param\u00e8tres \u00e0 haute fr\u00e9quence<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mesure du param\u00e8tre S (1MHz-20GHz)<\/li>\n\n\n\n<li>Les indicateurs cl\u00e9s :<\/li>\n\n\n\n<li>Fr\u00e9quence d'auto-r\u00e9sonance (SRF)<\/li>\n\n\n\n<li>Courbe de fr\u00e9quence du facteur Q<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor.jpg\" alt=\"\" class=\"wp-image-6699\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor.jpg 600w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor-300x201.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/05\/Smd-Inductor-150x101.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"V_Troubleshooting_Guide\"><\/span>V.Guide de d\u00e9pannage<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tableau de diagnostic des anomalies de mesure<\/strong> <\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Sympt\u00f4me<\/th><th>Causes possibles<\/th><th>Solutions recommand\u00e9es<\/th><th>Notes techniques<\/th><\/tr><\/thead><tbody><tr><td>D\u00e9rive de la lecture<\/td><td>\u2022 Poor contact (Rcontact &gt;50m\u03a9)<br>\u2022 Loose fixture<br>\u2022 Temperature fluctuation<\/td><td>\u2022 Use gold-plated spring probes<br>\u2022 Apply contact cleaner (e.g., DeoxIT D5)<br>\u2022 Stabilize test environment (\u00b11\u00b0C)<\/td><td>Contact resistance should be &lt;20m\u03a9 for nH-range measurements<\/td><\/tr><tr><td>Faible valeur Q<\/td><td>\u2022 Core material loss (tan\u03b4&gt;0.1)<br>\u2022 Frequency near SRF<br>\u2022 Excessive DC bias<\/td><td>\u2022 Test at manufacturer-specified freq<br>\u2022 Reduce DC bias to &lt;10% Isat<br>\u2022 Verify core material specs<\/td><td>Pour les applications RF : Q&lt;30@100MHz indique un probl\u00e8me potentiel<\/td><\/tr><tr><td>Valeur L n\u00e9gative<\/td><td>\u2022 Testing beyond SRF<br>\u2022 Fixture capacitance (&gt;1pF)<br>\u2022 Ground loop issues<\/td><td>\u2022 Test at \u226450% of SRF<br>\u2022 Use low-C fixtures (e.g., triaxial)<br>\u2022 Implement ground isolation<\/td><td>Maintain SRF \u22653\u00d7 operating frequency for reliable measureme<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Param\u00e8tres d'application typiques<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Circuits RF mobiles :<\/li>\n\n\n\n<li>Fr\u00e9quence d'essai : 2,4\/5,8 GHz<\/li>\n\n\n\n<li>Tolerance: \u00b12%<\/li>\n\n\n\n<li>Puissance du serveur :<\/li>\n\n\n\n<li>Biais DC : 20A<\/li>\n\n\n\n<li>Thermal requirement: \u0394L&lt;5%@105\u2103<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"VI_Test_Report_Template\"><\/span>VI.Mod\u00e8le de rapport d'essai<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Contenu essentiel<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Enregistrements environnementaux (temp\u00e9rature\/humidit\u00e9\/pression)<\/li>\n\n\n\n<li>ID du certificat d'\u00e9talonnage de l'instrument<\/li>\n\n\n\n<li>Donn\u00e9es brutes avec horodatage<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Exemple de pr\u00e9sentation de donn\u00e9es<\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>N\u00b0 de lot<\/th><th>Inductance @1MHz (nH)<\/th><th>Facteur de qualit\u00e9 (Q)<\/th><th>Fr\u00e9quence auto-r\u00e9sonnante (GHz)<\/th><th>DC Resistance (m\u03a9)<\/th><\/tr><\/thead><tbody><tr><td>A001<\/td><td>56.2 \u00b10.3<\/td><td>42<\/td><td>3.5<\/td><td>18.7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This guide complies with IEC 62391-1 standards. For automotive applications, additional AEC-Q200 85\u2103\/85%RH environmental testing is required. Always refer to the manufacturer&#8217;s specifications (e.g., Murata Measurement Manual) for device-specific requirements.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Guide complet sur le test des inducteurs CMS :Comprend des proc\u00e9dures de test \u00e9tape par \u00e9tape, des conseils de d\u00e9pannage pour les probl\u00e8mes courants (facteur Q, SRF, probl\u00e8mes de contact), et des m\u00e9thodes avanc\u00e9es pour les tests de temp\u00e9rature et de polarisation CC.<\/p>","protected":false},"author":2,"featured_media":6698,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[138],"class_list":["post-6695","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-smd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Test SMD Inductor? 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