{"id":93498,"date":"2024-10-27T11:00:52","date_gmt":"2024-10-27T10:00:52","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/lm-3886-what-is-it-technical-data-schematic-diagram\/"},"modified":"2026-04-08T10:47:05","modified_gmt":"2026-04-08T08:47:05","slug":"lm-3886-what-is-it-technical-data-schematic-diagram","status":"publish","type":"post","link":"https:\/\/botland.store\/blog\/lm-3886-what-is-it-technical-data-schematic-diagram\/","title":{"rendered":"LM 3886 &#8211; What is it? Technical data, schematic diagram"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time:<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span>\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"93498\" class=\"elementor elementor-93498 elementor-81375\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e48e42e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e48e42e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-dcf5e75\" data-id=\"dcf5e75\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-da414c6 elementor-widget elementor-widget-text-editor\" data-id=\"da414c6\" 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>Older designs of electroacoustic amplifiers were first based on electron tubes and later on discrete transistors. With the development of semiconductor technology, it was possible to create <strong>power amplifiers in the form of integrated circuits<\/strong>, which require relatively few external components to operate giving very good sound quality &#8211; meet the already cult among electronics-melomaniacs <strong>LM3886<\/strong> audio power amplifier integrated circuit! <\/p>\n\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-228ef47 elementor-widget elementor-widget-heading\" data-id=\"228ef47\" 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\">LM3886 - basic information<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-187119a elementor-widget elementor-widget-text-editor\" data-id=\"187119a\" 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><strong>The LM3886 IC<\/strong> was designed and put into production by Texas Instruments as part of a series called Overture. This integrated power amplifier, allows a continuous RMS power of 68W with a 4\u03a9 output load and 38W RMS for an 8\u03a9 load with a THD + N ratio of 0.1% in the operating band from 20Hz to 20kHz. This circuit uses <strong>SPiKe technology<\/strong>, according to which a built-in protection circuit sets the amplifier within an acceptable temperature range for proper and safe operation, which sets the LM3886 apart from many discrete and hybrid designs. Thanks to this, we are assured<strong> protection of the circuit<\/strong> also against other undesirable conditions, such as short circuits, uncontrolled operating temperature, or overvoltages coming from the power supply.     <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-f1b3da4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f1b3da4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-bb2e4d3\" data-id=\"bb2e4d3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-97e6d22 elementor-widget elementor-widget-image\" data-id=\"97e6d22\" 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=\"https:\/\/botland.com.pl\/blog\/wp-content\/uploads\/2024\/10\/Projekt-bez-nazwy-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Projekt bez nazwy (1)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6OTM0ODYsInVybCI6Imh0dHBzOlwvXC9ib3RsYW5kLnN0b3JlXC9ibG9nXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8xMFwvUHJvamVrdC1iZXotbmF6d3ktMS5wbmcifQ%3D%3D\" data-wpel-link=\"internal\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/10\/Projekt-bez-nazwy-1-1024x684.png\" class=\"attachment-large size-large wp-image-93486\" alt=\"\" srcset=\"https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/10\/Projekt-bez-nazwy-1-1024x684.png 1024w, https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/10\/Projekt-bez-nazwy-1-300x200.png 300w, https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/10\/Projekt-bez-nazwy-1-768x513.png 768w, https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/10\/Projekt-bez-nazwy-1.png 1130w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\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\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-102d23f\" data-id=\"102d23f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-11bace6 elementor-widget elementor-widget-text-editor\" data-id=\"11bace6\" 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>The LM3886 amplifier features <strong>an excellent signal-to-noise ratio<\/strong>, exceeding 92dB with a typical noise figure of 2.0\u00b5V. In addition, the LM3886 features an exceptionally low THD+N harmonic content ratio of just 0.03% at maximum power for the rated load across the entire operating band, and provides excellent linearity with a typical IMD (SMPTE) ratio of 0.004%. This makes it<strong>a popular choice among DIY builders<\/strong>.  <\/p>\n\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a6c61d elementor-widget elementor-widget-heading\" data-id=\"1a6c61d\" 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\">LM3886 - key features and technical parameters of the circuit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af5c7fe elementor-widget elementor-widget-text-editor\" data-id=\"af5c7fe\" 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<ul>\n<li>Average continuous output power: 68W for 4\u03a9 load at \u00b128V supply voltage<\/li>\n<li>Average continuous output power: 38W for 8\u03a9 load at \u00b128V supply voltage<\/li>\n<li>Average continuous output power: 50W for 8\u03a9 load at \u00b135V supply voltage<\/li>\n<li>Instantaneous peak output power: 135W<\/li>\n<li>Signal-to-noise ratio: S\/N R \u2265 92 dB<\/li>\n<li>Input mute function (MUTE)<\/li>\n<li>Protection of the amplifier output against shorting to ground or to the power supply rails through an internal current limitation circuit<\/li>\n<li>Protection of the amplifier output against overvoltages from inductive loads<\/li>\n<li>Protection against under-voltage supply, which prevents the occurrence of internal repolarization when |VEE| + |VCC| \u2264 12 V, thus eliminating transients when switching the circuit on and off<\/li>\n<li>TO-220 housing with 11 leads for through-hole mounting (THT)<\/li>\n<li>Supply voltage range from 20V to 94V<\/li>\n<\/ul>\n\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-b23f28d elementor-widget elementor-widget-heading\" data-id=\"b23f28d\" 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\">LM3886 - circuit pinout description<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c54917 elementor-widget elementor-widget-text-editor\" data-id=\"9c54917\" 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>Numerical order ordered:<\/p>\n<ol>\n<li>V+ &#8211; positive supply voltage rail input<\/li>\n<li>NC &#8211; lead not connected<\/li>\n<li>OUTPUT &#8211; output for the load (speaker)<\/li>\n<li>V- &#8211; input of negative rail of supply voltage or ground (for single supply)<\/li>\n<li>V+ &#8211; positive supply voltage rail input<\/li>\n<li>NC &#8211; lead not connected<\/li>\n<li>GND &#8211; ground<\/li>\n<li>MUTE &#8211; mute the amplifier input during power on and off<\/li>\n<li>VIN- &#8211; inverting input<\/li>\n<li>VIN+ &#8211; non-inverting input<\/li>\n<li>NC &#8211; lead not connected<\/li>\n<\/ol>\n\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-cc2dfee elementor-widget elementor-widget-heading\" data-id=\"cc2dfee\" 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\">LM3886 - MUTE function<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-966e09b elementor-widget elementor-widget-text-editor\" data-id=\"966e09b\" 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><strong>The MUTE function of<\/strong> the LM3886 circuit allows the user to <strong>mute the output of the amplifier<\/strong> by applying a control current of 0.5mA to pin number 8 &#8211; the implementation of the MUTE circuit involves selecting an RM <a href=\"https:\/\/botland.com.pl\/50-rezystory-oporniki\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">resistor<\/a> with respect to the negative rail of the supply voltage in conjunction with a switch. When the switch is open, it cuts off the current flow to pin number 8 from the negative rail of the supply voltage or ground, which presents the LM3886 into mute mode. The value of the RM resistance, is calculated from the following equation:  <\/p>\n<p><strong>RM*(|VEE &#8211; 2.6V|)\/I8; where I8 =&gt; 0.5mA<\/strong><\/p>\n\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-414c6ac elementor-widget elementor-widget-heading\" data-id=\"414c6ac\" 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\">LM3886 - undervoltage protection<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b169456 elementor-widget elementor-widget-text-editor\" data-id=\"b169456\" 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>When the power supply voltage is turned on, an under-voltage protection circuit brings <strong>the appropriate voltages to the power supply rails<\/strong> before they are applied to the various internal circuits of the LM3886 in such a way that no DC output spikes occur. After shutdown, the LM3886&#8217;s output is automatically shorted to ground beforehand in such a way that oscillations or other transients do not occur on power loss. <\/p>\n\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-9d31096 elementor-widget elementor-widget-heading\" data-id=\"9d31096\" 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\">LM3886 - overvoltage protection<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15b4286 elementor-widget elementor-widget-text-editor\" data-id=\"15b4286\" 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>The LM3886 IC contains a built-in surge protection circuit that<strong> limits the output current to about 11A peak<\/strong>, while providing voltage suppression, but not through the built-in surge diodes. The voltage suppression effect is roughly the same, although the output <a href=\"https:\/\/botland.com.pl\/24-tranzystory\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">transistors<\/a> of the power stage are designed for alternating (push-pull) switching allowing the conduction of currents with large amplitude difference changes over short time intervals. <\/p>\n\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-b2f5fa0 elementor-widget elementor-widget-heading\" data-id=\"b2f5fa0\" 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\">LM3886 - thermal protection<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9562817 elementor-widget elementor-widget-text-editor\" data-id=\"9562817\" 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>The LM3886 chip uses SPiKe technology, which relies on <strong>the built-in special ladder of transistors<\/strong> that act on the thermal overload of the LM3886 amplifier to protect it from momentary peak temperature loads in a dynamic manner. When the operating temperature reaches 165*C, <strong>the LM3886 circuit shuts down automatically<\/strong>. The circuit returns to possible operating conditions again when the temperature of the structure drops to about 155*C, but if the temperature rises again, the shutdown will occur again at 165*C. Therefore, the device can heat up to a relatively high temperature level if the fault is temporary, but a permanent fault will cause the circuit to shut down on a basis modeled after a Schmitt flip-flop, between 155*C and 165*C. Therefore, choose <a href=\"https:\/\/botland.com.pl\/102-radiatory\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">a heat sink<\/a> or an additional <a href=\"https:\/\/botland.com.pl\/531-wentylatory-montazowe\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">fan<\/a> to force the cooling circuit, according to the thermal operating conditions of the target application.    <\/p>\n\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>LM3886 is an integrated power amplifier that has become very popular among audio amplifier builders! See our article for technical details! <\/p>\n","protected":false},"author":21,"featured_media":93494,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7,179],"tags":[],"class_list":["post-93498","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elektronika","category-kompendium"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LM 3886 - What is it? Technical data, schematic diagram - Botland<\/title>\n<meta name=\"description\" content=\"LM3886 is an integrated power amplifier that has become very popular among audio amplifier builders! 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