{"id":7918,"date":"2025-04-18T14:17:41","date_gmt":"2025-04-18T06:17:41","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=7918"},"modified":"2026-08-31T14:16:04","modified_gmt":"2026-08-31T06:16:04","slug":"how-to-eliminate-noise-from-switching-power-supply-2","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/","title":{"rendered":"How to Eliminate Noise from Switching Power Supply?"},"content":{"rendered":"<p class=\"\" data-start=\"272\" data-end=\"861\"><a href=\"https:\/\/www.wehopower.com\/products\/\" target=\"_blank\" rel=\"noopener\">Switching power supplies<\/a> (SMPS) are widely used in electronic equipment due to their compact size, high efficiency, and lightweight design. However, these advantages come with a significant challenge: noise generation. Noise from switching power supplies can interfere with the proper functioning of the equipment and cause electromagnetic interference (EMI), impacting not only the device itself but also surrounding devices.<\/p>\n<p class=\"\" data-start=\"272\" data-end=\"861\">In this blog, we\u2019ll explore the sources of power supply noise, its types, and effective strategies for how to eliminate noise from switching power supply systems.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Prze\u0142\u0105cznik Spisu Tre\u015bci\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Sources_of_Power_Supply_Noise\" >Sources of Power Supply Noise<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#3_Types_of_Power_Supply_Noise\" >3 Types of Power Supply Noise<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Conducted_Emission\" >Conducted Emission<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#How_to_reduce_switching_power_supply_noise_from_conducted_emission\" >How to reduce switching power supply noise from conducted emission?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Ripple_Noise\" >Ripple Noise<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#How_to_reduce_ripple_noise\" >How to reduce ripple noise?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Radiated_Emission\" >Radiated Emission<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#How_to_reduce_radiated_emission\" >How to reduce radiated emission?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Common_Mode_Noise\" >Common Mode Noise<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#How_to_reduce_common_mode_noise\" >How to reduce common mode noise?<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Impact_of_Noise_on_Switching_Power_Supply\" >Impact of Noise on Switching Power Supply<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#How_to_Eliminate_Noise_from_Switching_Power_Supply\" >How to Eliminate Noise from Switching Power Supply<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Improving_Circuit_Design\" >Improving Circuit Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Using_Filters\" >Using Filters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Electromagnetic_Compatibility_EMC_Design\" >Electromagnetic Compatibility (EMC) Design<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Importance_of_EMC\" >Importance of EMC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Four_Basic_EMC_Strategies\" >Four Basic EMC Strategies<\/a><\/li><\/ul><\/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:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/#References\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"863\" data-end=\"903\"><span class=\"ez-toc-section\" id=\"Sources_of_Power_Supply_Noise\"><\/span><strong data-start=\"867\" data-end=\"903\">Sources of Power Supply Noise<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"905\" data-end=\"1395\">Noise in switching power supplies primarily originates from the high-speed switching of transistors and other semiconductor components. When the power supply switches between on and off states at high frequencies, the transition causes unwanted electromagnetic waves. These waves can either radiate through the air or propagate through the circuit, leading to interference. <a href=\"https:\/\/www.wehopower.com\/products\/\" target=\"_blank\" rel=\"noopener\">Power supply<\/a> noise can be classified into several types, each with unique characteristics and mitigation strategies.<\/p>\n<h2 data-start=\"1397\" data-end=\"1441\"><span class=\"ez-toc-section\" id=\"3_Types_of_Power_Supply_Noise\"><\/span><strong data-start=\"1401\" data-end=\"1441\">3 Types of Power Supply Noise<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"1443\" data-end=\"1585\">To effectively eliminate noise from switching power supplies, it&#8217;s essential to understand the different types of noise that can be generated:<\/p>\n<div class=\"group pointer-events-none relative flex justify-center *:pointer-events-auto\">\n<div class=\"tableContainer horzScrollShadows relative\">\n<table class=\"min-w-full\" data-start=\"43\" data-end=\"518\">\n<thead data-start=\"43\" data-end=\"137\">\n<tr data-start=\"43\" data-end=\"137\">\n<th data-start=\"43\" data-end=\"69\"><strong data-start=\"45\" data-end=\"59\">Noise Type<\/strong><\/th>\n<th data-start=\"69\" data-end=\"137\"><strong data-start=\"71\" data-end=\"88\">How to Reduce<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"233\" data-end=\"518\">\n<tr data-start=\"233\" data-end=\"327\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"233\" data-end=\"260\"><strong data-start=\"235\" data-end=\"257\">Conducted Emission<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"260\" data-end=\"327\">Install input filters, use EMC filters<\/td>\n<\/tr>\n<tr data-start=\"328\" data-end=\"423\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"328\" data-end=\"355\"><strong data-start=\"330\" data-end=\"346\">Ripple Noise<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)] min-w-[calc(var(--thread-content-max-width)\/3)]\" data-start=\"355\" data-end=\"423\">Use filtering capacitors, choose high-quality capacitors<\/td>\n<\/tr>\n<tr data-start=\"424\" data-end=\"518\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"424\" data-end=\"451\"><strong data-start=\"426\" data-end=\"447\">Radiated Emission<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)] min-w-[calc(var(--thread-content-max-width)\/3)]\" data-start=\"451\" data-end=\"518\">Implement shielding, arrange cables to minimize radiation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h3 data-start=\"1587\" data-end=\"1619\"><span class=\"ez-toc-section\" id=\"Conducted_Emission\"><\/span><strong data-start=\"1592\" data-end=\"1619\">Conducted Emission<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"1620\" data-end=\"1946\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-7922\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141235-300x214.jpg?quality=85&strip=all\" alt=\"How to Eliminate Noise from Switching Power Supply?  title=\" width=\"300\" height=\"214\" How to Eliminate Noise from Switching Power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141235-300x214.jpg?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141235.jpg?quality=85&strip=all 446w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p class=\"\" data-start=\"1620\" data-end=\"1946\">Conducted emission noise refers to unwanted electrical noise that travels along power supply lines or signal lines, typically back to the AC supply. It can also affect other circuits within the same system or externally. This type of noise includes harmonics of the switching frequency, making it more challenging to control.<\/p>\n<h4 data-start=\"1948\" data-end=\"2021\"><span class=\"ez-toc-section\" id=\"How_to_reduce_switching_power_supply_noise_from_conducted_emission\"><\/span><strong data-start=\"1948\" data-end=\"2019\">How to reduce switching power supply noise from conducted emission?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul data-start=\"2022\" data-end=\"2231\">\n<li class=\"\" data-start=\"2022\" data-end=\"2088\">\n<p class=\"\" data-start=\"2024\" data-end=\"2088\">Install input filters to prevent noise from entering the system.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2089\" data-end=\"2231\">\n<p class=\"\" data-start=\"2091\" data-end=\"2231\">Use specialized EMC (Electromagnetic Compatibility) filters that block or attenuate these emissions before they affect sensitive components.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2233\" data-end=\"2259\"><span class=\"ez-toc-section\" id=\"Ripple_Noise\"><\/span><strong data-start=\"2238\" data-end=\"2259\">Ripple Noise<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"2260\" data-end=\"2541\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-7919\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141212-300x283.jpg?quality=85&strip=all\" alt=\"How to Eliminate Noise from Switching Power Supply?  title=\" width=\"300\" height=\"283\" How to Eliminate Noise from Switching Power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141212-300x283.jpg?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141212.jpg?quality=85&strip=all 434w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p class=\"\" data-start=\"2260\" data-end=\"2541\">Ripple noise occurs when the AC signal remains superimposed on the DC output of the power supply. This fluctuation results from the switching process and can degrade the performance of sensitive components. Typically, ripple noise is measured as a percentage of the output voltage.<\/p>\n<h4 data-start=\"2543\" data-end=\"2576\"><span class=\"ez-toc-section\" id=\"How_to_reduce_ripple_noise\"><\/span><strong data-start=\"2543\" data-end=\"2574\">How to reduce ripple noise?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul data-start=\"2577\" data-end=\"2749\">\n<li class=\"\" data-start=\"2577\" data-end=\"2650\">\n<p class=\"\" data-start=\"2579\" data-end=\"2650\">Use additional filtering capacitors to smooth out the voltage waveform.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2651\" data-end=\"2749\">\n<p class=\"\" data-start=\"2653\" data-end=\"2749\">Opt for high-quality capacitors that provide better ripple rejection at the switching frequency.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2751\" data-end=\"2782\"><span class=\"ez-toc-section\" id=\"Radiated_Emission\"><\/span><strong data-start=\"2756\" data-end=\"2782\">Radiated Emission<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"2783\" data-end=\"3135\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-7920\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141220-300x214.jpg?quality=85&strip=all\" alt=\"How to Eliminate Noise from Switching Power Supply?  title=\" width=\"300\" height=\"214\" How to Eliminate Noise from Switching Power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141220-300x214.jpg?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141220.jpg?quality=85&strip=all 441w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p class=\"\" data-start=\"2783\" data-end=\"3135\">Radiated emission noise refers to electromagnetic radiation emitted from the power supply\u2019s components or wires. This type of noise can disrupt other nearby devices, especially those sensitive to radio frequency (RF) signals. Strict standards exist for radiated emission levels to minimize interference with communications and other electronic systems.<\/p>\n<h4 data-start=\"3137\" data-end=\"3175\"><span class=\"ez-toc-section\" id=\"How_to_reduce_radiated_emission\"><\/span><strong data-start=\"3137\" data-end=\"3173\">How to reduce radiated emission?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul data-start=\"3176\" data-end=\"3331\">\n<li class=\"\" data-start=\"3176\" data-end=\"3250\">\n<p class=\"\" data-start=\"3178\" data-end=\"3250\">Implement shielding techniques to prevent radiated energy from escaping.<\/p>\n<\/li>\n<li class=\"\" data-start=\"3251\" data-end=\"3331\">\n<p class=\"\" data-start=\"3253\" data-end=\"3331\">Ensure that cables and components are properly arranged to minimize radiation.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3333\" data-end=\"3364\"><span class=\"ez-toc-section\" id=\"Common_Mode_Noise\"><\/span><strong data-start=\"3338\" data-end=\"3364\">Common Mode Noise<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"3365\" data-end=\"3688\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7921\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141226-300x264.jpg?quality=85&strip=all\" alt=\"How to Eliminate Noise from Switching Power Supply?  title=\" width=\"300\" height=\"264\" How to Eliminate Noise from Switching Power title=\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141226-300x264.jpg?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2025\/04\/\u5fae\u4fe1\u622a\u56fe_20250418141226.jpg?quality=85&strip=all 446w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p class=\"\" data-start=\"3365\" data-end=\"3688\">Common mode noise occurs when unwanted noise currents flow between the power lines and ground. This type of noise can lead to voltage surges and is particularly problematic for audio, video, and data systems. Common mode noise often travels through the power line and can cause malfunctions in sensitive electronic devices.<\/p>\n<h4 data-start=\"3690\" data-end=\"3728\"><span class=\"ez-toc-section\" id=\"How_to_reduce_common_mode_noise\"><\/span><strong data-start=\"3690\" data-end=\"3726\">How to reduce common mode noise?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul data-start=\"3729\" data-end=\"3875\">\n<li class=\"\" data-start=\"3729\" data-end=\"3810\">\n<p class=\"\" data-start=\"3731\" data-end=\"3810\">Use common-mode chokes and filters to block noise before it enters the circuit.<\/p>\n<\/li>\n<li class=\"\" data-start=\"3811\" data-end=\"3875\">\n<p class=\"\" data-start=\"3813\" data-end=\"3875\">Ensure proper grounding and layout to minimize noise coupling.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"3877\" data-end=\"3929\"><span class=\"ez-toc-section\" id=\"Impact_of_Noise_on_Switching_Power_Supply\"><\/span><strong data-start=\"3881\" data-end=\"3929\">Impact of Noise on Switching Power Supply<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"3931\" data-end=\"4077\">The impact of power supply noise can be severe, both for the device itself and for other electronic systems. Some of the key consequences include:<\/p>\n<ul data-start=\"4079\" data-end=\"4573\">\n<li class=\"\" data-start=\"4079\" data-end=\"4192\">\n<p class=\"\" data-start=\"4081\" data-end=\"4192\"><strong data-start=\"4081\" data-end=\"4109\">Malfunctioning Circuits:<\/strong> Noise can interfere with sensitive circuits, causing them to behave unpredictably.<\/p>\n<\/li>\n<li class=\"\" data-start=\"4193\" data-end=\"4339\">\n<p class=\"\" data-start=\"4195\" data-end=\"4339\"><strong data-start=\"4195\" data-end=\"4217\">Signal Distortion:<\/strong> In systems such as audio and video equipment, noise can cause distortion in the signals, leading to degraded performance.<\/p>\n<\/li>\n<li class=\"\" data-start=\"4340\" data-end=\"4460\">\n<p class=\"\" data-start=\"4342\" data-end=\"4460\"><strong data-start=\"4342\" data-end=\"4365\">Reduced Efficiency:<\/strong> Excessive noise can cause energy losses, impacting the overall efficiency of the power supply.<\/p>\n<\/li>\n<li class=\"\" data-start=\"4461\" data-end=\"4573\">\n<p class=\"\" data-start=\"4463\" data-end=\"4573\"><strong data-start=\"4463\" data-end=\"4484\">Component Damage:<\/strong> High levels of EMI or noise may damage electronic components, leading to device failure.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"4575\" data-end=\"4636\"><span class=\"ez-toc-section\" id=\"How_to_Eliminate_Noise_from_Switching_Power_Supply\"><\/span><strong data-start=\"4579\" data-end=\"4636\">How to Eliminate Noise from Switching Power Supply<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"4638\" data-end=\"4806\">To effectively eliminate or reduce switching power supply noise, various strategies and techniques can be applied. Below, we outline some of the most effective methods.<\/p>\n<h3 data-start=\"4808\" data-end=\"4846\"><span class=\"ez-toc-section\" id=\"Improving_Circuit_Design\"><\/span><strong data-start=\"4813\" data-end=\"4846\">Improving Circuit Design<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"4847\" data-end=\"4962\">A well-designed circuit can significantly reduce the amount of noise generated. Consider the following design tips:<\/p>\n<ul data-start=\"4963\" data-end=\"5218\">\n<li class=\"\" data-start=\"4963\" data-end=\"5005\">\n<p class=\"\" data-start=\"4965\" data-end=\"5005\">Use low-noise components where possible.<\/p>\n<\/li>\n<li class=\"\" data-start=\"5006\" data-end=\"5110\">\n<p class=\"\" data-start=\"5008\" data-end=\"5110\">Optimize layout to minimize noise paths, especially between the power supply and sensitive components.<\/p>\n<\/li>\n<li class=\"\" data-start=\"5111\" data-end=\"5218\">\n<p class=\"\" data-start=\"5113\" data-end=\"5218\">Ensure that the ground plane is well-designed to prevent ground loops, which can exacerbate noise issues.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5220\" data-end=\"5247\"><span class=\"ez-toc-section\" id=\"Using_Filters\"><\/span><strong data-start=\"5225\" data-end=\"5247\">Using Filters<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"5248\" data-end=\"5375\">Filters are an essential tool for noise reduction in switching power supplies. Several types of filters can be used, including:<\/p>\n<ul data-start=\"5376\" data-end=\"5727\">\n<li class=\"\" data-start=\"5376\" data-end=\"5468\">\n<p class=\"\" data-start=\"5378\" data-end=\"5468\"><strong data-start=\"5378\" data-end=\"5393\">LC Filters:<\/strong> These combine inductors and capacitors to filter out high-frequency noise.<\/p>\n<\/li>\n<li class=\"\" data-start=\"5469\" data-end=\"5568\">\n<p class=\"\" data-start=\"5471\" data-end=\"5568\"><strong data-start=\"5471\" data-end=\"5486\">RC Filters:<\/strong> These use resistors and capacitors to smooth out signals and reduce ripple noise.<\/p>\n<\/li>\n<li class=\"\" data-start=\"5569\" data-end=\"5727\">\n<p class=\"\" data-start=\"5571\" data-end=\"5727\"><strong data-start=\"5571\" data-end=\"5595\">Common Mode Filters:<\/strong> These filters block noise traveling through both the live and neutral lines simultaneously, effectively reducing common mode noise.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5729\" data-end=\"5785\"><span class=\"ez-toc-section\" id=\"Electromagnetic_Compatibility_EMC_Design\"><\/span><strong data-start=\"5734\" data-end=\"5785\">Electromagnetic Compatibility (EMC) Design<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"5786\" data-end=\"6076\">Electromagnetic compatibility (EMC) design is crucial for ensuring that a switching power supply can operate without causing or being affected by noise. Effective EMC design prevents unwanted electromagnetic interference from radiating or coupling into the circuit. Here are key strategies:<\/p>\n<h4 data-start=\"6078\" data-end=\"6112\"><span class=\"ez-toc-section\" id=\"Importance_of_EMC\"><\/span><strong data-start=\"6084\" data-end=\"6112\">Importance of EMC<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p class=\"\" data-start=\"6113\" data-end=\"6327\">Incorporating EMC design into your power supply ensures compliance with regulatory standards and prevents interference with other devices. It also contributes to the overall stability and reliability of the system.<\/p>\n<h4 data-start=\"6329\" data-end=\"6371\"><span class=\"ez-toc-section\" id=\"Four_Basic_EMC_Strategies\"><\/span><strong data-start=\"6335\" data-end=\"6371\">Four Basic EMC Strategies<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p class=\"\" data-start=\"6372\" data-end=\"6456\">Effective EMC design relies on four primary strategies to reduce or eliminate noise:<\/p>\n<ul data-start=\"6458\" data-end=\"7053\">\n<li class=\"\" data-start=\"6458\" data-end=\"6605\">\n<p class=\"\" data-start=\"6460\" data-end=\"6605\"><strong data-start=\"6460\" data-end=\"6475\">Reflection:<\/strong> This involves blocking the conduction of noise using LC filters. It helps prevent noise from propagating through the power lines.<\/p>\n<\/li>\n<li class=\"\" data-start=\"6606\" data-end=\"6736\">\n<p class=\"\" data-start=\"6608\" data-end=\"6736\"><strong data-start=\"6608\" data-end=\"6623\">Absorption:<\/strong> Ferrite cores and chip beads can absorb noise and convert it into heat, reducing its impact on the power supply.<\/p>\n<\/li>\n<li class=\"\" data-start=\"6737\" data-end=\"6855\">\n<p class=\"\" data-start=\"6739\" data-end=\"6855\"><strong data-start=\"6739\" data-end=\"6753\">Bypassing:<\/strong> Capacitors and varistors can divert noise to ground, helping to mitigate high-frequency disturbances.<\/p>\n<\/li>\n<li class=\"\" data-start=\"6856\" data-end=\"7053\">\n<p class=\"\" data-start=\"6858\" data-end=\"7053\"><strong data-start=\"6858\" data-end=\"6872\">Shielding:<\/strong> Enclosing the power supply in a metal case or using a radio wave absorber like ferrite can prevent radiated noise from escaping the power supply and interfering with other systems.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"7055\" data-end=\"7076\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong data-start=\"7059\" data-end=\"7076\">Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"7078\" data-end=\"7472\">Switching power supply noise is an inevitable byproduct of high-efficiency designs, but it can be effectively managed with the right techniques. By understanding the sources and types of noise\u2014conducted emission, ripple noise, radiated emission, and common mode noise\u2014you can implement strategies like improving circuit design, using filters, and applying EMC measures to minimize interference.<\/p>\n<p class=\"\" data-start=\"7474\" data-end=\"7779\">If you\u2019re looking to reduce switching power supply noise, it\u2019s essential to focus on a holistic approach that incorporates these strategies. With the right tools and design practices, you can ensure that your switching power supply operates efficiently, quietly, and in compliance with industry standards.<\/p>\n<h2 data-start=\"7474\" data-end=\"7779\"><span class=\"ez-toc-section\" id=\"References\"><\/span><strong>References<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/www.4niev.com\/switching-power-supply-noise\/\" target=\"_blank\" rel=\"nofollow noopener\">Switching Power Supply Noise<\/a><\/p>\n<p><a href=\"https:\/\/www.tdk.com\/en\/tech-mag\/power\/07\" target=\"_blank\" rel=\"nofollow noopener\">Part 7: Noise Countermeasures for Switching Power Supplies<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Switching power supplies (SMPS) are widely used in electronic equipment due to their compact size, high efficiency, and lightweight design. However, these advantages come with a significant challenge: noise generation. Noise from switching power supplies can interfere with the proper functioning of the equipment and cause electromagnetic interference (EMI), impacting not only the device itself&hellip; <a class=\"more-link\" href=\"https:\/\/www.wehopower.com\/pl\/news\/how-to-eliminate-noise-from-switching-power-supply-2\/\">Kontynuuj czytanie <span class=\"screen-reader-text\">How to Eliminate Noise from Switching Power Supply?<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":7921,"parent":0,"menu_order":252,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,148],"class_list":["post-7918","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-industry-news","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news\/7918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/comments?post=7918"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news\/7918\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/media\/7921"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/media?parent=7918"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/pl\/wp-json\/wp\/v2\/news_category?post=7918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}