{"id":5520,"date":"2025-01-08T16:38:45","date_gmt":"2025-01-08T07:38:45","guid":{"rendered":"https:\/\/www.bellnix.co.jp\/en\/?p=5520"},"modified":"2025-01-08T16:38:45","modified_gmt":"2025-01-08T07:38:45","slug":"operation-at-light-loadsis-the-bigger-one-better-than-the-smaller-one-vol-1","status":"publish","type":"post","link":"https:\/\/www.bellnix.co.jp\/en\/2025\/01\/08\/operation-at-light-loadsis-the-bigger-one-better-than-the-smaller-one-vol-1\/","title":{"rendered":"Operation at light loads<br>(Is the bigger one better than the smaller one?) Vol.1"},"content":{"rendered":"\n<p>For example, suppose you want 5V 0.1A (=0.5W) and you have a power supply with 5V 2A (=10W, a very generous specification) output and another with 5V 0.2A (=1W) output at hand.<\/p>\n\n\n\n<p>If both of them do not  have price and size issues, can both be used?<\/p>\n\n\n\n<p>First, let&#8217;s check the &#8220;load regulation&#8221; of the electrical specifications. For example, suppose the condition is &#8220;within the range of 10% to 100% of rated output\u201d.For a 5V 2A power supply, 10% is 0.2A, so if the load uses only 5V 0.1A, it is outside the specified range.<\/p>\n\n\n\n<p>The fact that the measurement condition is &#8220;10% to 100% load&#8221; suggests that some characteristics may have changed in the &#8220;0% to 10% load&#8221; range.<\/p>\n\n\n\n<p>The following are possible behaviors at low loads:<br>-Higher output voltage at light loads<br>-Oscillation frequency decreases and ripple increases slightly.<br>-The oscillation frequency does not change, but the mode shifts to repeating oscillation and stop, and ripple noise increases a little at the time.<\/p>\n\n\n\n<p>If the frequency changes, it is conceivable that the oscillation frequency will be in the audible range, so there may be cases where some countermeasures are required.<br>*the load change is taken up for the subject, there are cases that a &#8220;minimum load&#8221; is specified.<\/p>\n\n\n\n<p>When selecting a converter, it is necessary to check the spec range and various functions of the converter.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"361\" height=\"260\" src=\"https:\/\/www.bellnix.co.jp\/en\/websystem\/wp-content\/uploads\/2023\/07\/beginners027.png\" alt=\"\" class=\"wp-image-4487\" style=\"width:485px;height:auto\" srcset=\"https:\/\/www.bellnix.co.jp\/en\/websystem\/wp-content\/uploads\/2023\/07\/beginners027.png 361w, https:\/\/www.bellnix.co.jp\/en\/websystem\/wp-content\/uploads\/2023\/07\/beginners027-300x216.png 300w\" sizes=\"(max-width: 361px) 100vw, 361px\" \/><\/figure>\n\n\n\n<p>\u25cf Output may vary depending on load changes (output voltage may be higher at light loads)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For example, suppose you want 5V 0.1A (=0.5W) and you have a power supply with 5V 2A (=10W, a very generous sp [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kadence_starter_templates_imported_post":false,"footnotes":""},"categories":[56],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Operation at light loads(Is the bigger one better than the smaller one?) 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