{"id":73504,"date":"2023-11-18T14:00:47","date_gmt":"2023-11-18T13:00:47","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/78l05-co-to-jest-dane-techniczne-schemat-cena-i-opinie\/"},"modified":"2026-04-08T11:03:14","modified_gmt":"2026-04-08T09:03:14","slug":"78l05-co-je-to-technicke-udaje-schema-cena-a-nazory","status":"publish","type":"post","link":"https:\/\/botland.cz\/blog\/78l05-co-je-to-technicke-udaje-schema-cena-a-nazory\/","title":{"rendered":"78L05 – Co je to? Technick\u00e9 \u00fadaje, sch\u00e9ma, cena a n\u00e1zory"},"content":{"rendered":"\u010cas \u010dten\u00ed:<\/span> 3<\/span> min.<\/span><\/span>\t\t
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78L05 je line\u00e1rn\u00ed stabiliz\u00e1tor v pouzd\u0159e TO92. Tato elektronick\u00e1 sou\u010d\u00e1stka je ur\u010dena pro mont\u00e1\u017e THT (Through-Hole Technology). V\u00fdstupn\u00ed proud stabiliz\u00e1toru 78L05 je 0,1 A, v\u00fdstupn\u00ed nap\u011bt\u00ed je +5 V.<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Line\u00e1rn\u00ed stabiliz\u00e1tory nap\u011bt\u00ed - co to je?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Line\u00e1rn\u00ed stabiliz\u00e1tory nap\u011bt\u00ed<\/strong><\/a> jsou relativn\u011b jednoduch\u00e9 elektronick\u00e9 sou\u010d\u00e1stky, jejich\u017e hlavn\u00edm \u00fakolem je stabiln\u011b (rovnom\u011brn\u011b) udr\u017eovat ur\u010ditou \u00farove\u0148 stejnosm\u011brn\u00e9ho nap\u011bt\u00ed b\u011bhem provozu.<\/strong><\/p>\n

Stabiliz\u00e1tor nap\u011bt\u00ed by m\u011bl b\u011bhem provozu udr\u017eovat ur\u010ditou hodnotu nap\u011bt\u00ed bez ohledu na zat\u00ed\u017een\u00ed soustavy, ke kter\u00e9 je p\u0159ipojen. To mimo jin\u00e9 znamen\u00e1 ochranu elektronick\u00fdch sou\u010d\u00e1st\u00ed za stabiliz\u00e1torem p\u0159i kol\u00eds\u00e1n\u00ed vstupn\u00edho nap\u011bt\u00ed.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Jak funguj\u00ed line\u00e1rn\u00ed stabiliz\u00e1tory nap\u011bt\u00ed?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Jak funguje line\u00e1rn\u00ed stabiliz\u00e1tor nap\u011bt\u00ed<\/strong><\/a>? P\u0159enosn\u00fd z\u00e1suvn\u00fd modul je pom\u011brn\u011b jednoduch\u00fd a funguje na principu zp\u011btn\u00e9 vazby smy\u010dky<\/strong>, kter\u00e1 umo\u017e\u0148uje stabilizaci nap\u011bt\u00ed Line\u00e1rn\u00ed stabiliz\u00e1tor porovn\u00e1v\u00e1 v\u00fdstupn\u00ed nap\u011bt\u00ed (tzv. skute\u010dn\u00e9) s pevn\u00fdm referen\u010dn\u00edm nap\u011bt\u00edm (na chybov\u00e9m zesilova\u010di). Obvod je pak navr\u017een tak, aby p\u0159esn\u011b ovl\u00e1dal pohon. Obvykle je to tranzistor typu MOSFET.<\/strong><\/a><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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V dal\u0161\u00ed etap\u011b je p\u0159\u00edpadn\u00fd rozd\u00edl nap\u011bt\u00ed zes\u00edlen a pou\u017eit pro ovl\u00e1d\u00e1n\u00ed. Samotn\u00e1 regulace je naopak provedena tak, aby bylo zaji\u0161t\u011bno maxim\u00e1ln\u00ed sn\u00ed\u017een\u00ed chyb v\u00fdstupn\u00edho nap\u011bt\u00ed. Takto vznik\u00e1 proudov\u00e1 smy\u010dka, kterou je zp\u011btn\u00e1 vazba<\/strong>. Line\u00e1rn\u00ed stabiliz\u00e1tory vd\u011b\u010d\u00ed za sv\u016fj n\u00e1zev dr\u00e1ze zp\u011btn\u00e9 vazby, proto\u017ee ka\u017ed\u00fd prvek dr\u00e1hy je line\u00e1rn\u00ed obvod.<\/p>\n

Tranzistor MOSFET<\/strong><\/a>, kter\u00fd se nej\u010dast\u011bji pou\u017e\u00edv\u00e1 pro p\u0159esnou regulaci nap\u011bt\u00ed, \u0159\u00edd\u00ed \u010dinnost stabiliz\u00e1toru t\u00edm, \u017ee kontroluje (\u0159\u00edd\u00ed) \u00fabytky nap\u011bt\u00ed (na tranzistoru MOSFET). Z tohoto d\u016fvodu mus\u00ed b\u00fdt vstupn\u00ed nap\u011bt\u00ed, tj. nap\u00e1jec\u00ed nap\u011bt\u00ed line\u00e1rn\u00edho stabiliz\u00e1toru, vy\u0161\u0161\u00ed ne\u017e v\u00fdstupn\u00ed nap\u011bt\u00ed.<\/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

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N-MOSFET tranzistor IRL540NPBF - THT - 5ks.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPOD\u00cdVEJTE SE NA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\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
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78L05 - co to je?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Elektronick\u00e1 sou\u010d\u00e1stka s ozna\u010den\u00edm 78L05<\/strong> je obl\u00edben\u00fd pevn\u00fd<\/strong> (neregulovan\u00fd) line\u00e1rn\u00ed stabiliz\u00e1tor<\/strong><\/a>, kter\u00fd poskytuje maxim\u00e1ln\u00ed provozn\u00ed proud 100 mA<\/strong>. Stabiliz\u00e1tor je vybaven t\u0159emi v\u00fdvody<\/strong> (t\u0159emi dr\u00e1tov\u00fdmi no\u017ei\u010dkami), kter\u00e9 se pou\u017e\u00edvaj\u00ed pro pr\u016fchoz\u00ed mont\u00e1\u017e THT<\/strong>. Jedn\u00e1 se o obl\u00edben\u00fd zp\u016fsob mont\u00e1\u017ee r\u016fzn\u00fdch typ\u016f elektronick\u00fdch sou\u010d\u00e1stek na desku plo\u0161n\u00fdch spoj\u016f (DPS)<\/strong><\/a>. Mont\u00e1\u017e se prov\u00e1d\u00ed tak, \u017ee se no\u017ei\u010dky prostr\u010d\u00ed otvory v desce. Line\u00e1rn\u00ed stabiliz\u00e1tory funguj\u00ed stejn\u011b jako prom\u011bnn\u00e9 odpory (rezistory<\/a>).<\/strong> Mezi aplikace line\u00e1rn\u00edch stabiliz\u00e1tor\u016f nap\u011bt\u00ed 78L05 pat\u0159\u00ed \u0159ada elektronick\u00fdch za\u0159\u00edzen\u00ed, kter\u00e1 ke sv\u00e9 \u010dinnosti vy\u017eaduj\u00ed stabiln\u00ed nap\u011bt\u00ed 5V.<\/p>\n

Ke stabiliz\u00e1toru nap\u011bt\u00ed s ozna\u010den\u00edm 78L05 jsou obvykle p\u0159ipojeny dv\u011b pasivn\u00ed elektronick\u00e9 sou\u010d\u00e1stky. Prvn\u00ed je vstupn\u00ed kondenz\u00e1tor a v\u00fdstupn\u00ed kondenz\u00e1tor<\/strong>. Pasivn\u00ed sou\u010d\u00e1stky na vstupu slou\u017e\u00ed k filtraci nap\u011bt\u00ed p\u0159iv\u00e1d\u011bn\u00e9ho do line\u00e1rn\u00edho stabiliz\u00e1toru. P\u0159i v\u00fdb\u011bru vstupn\u00edch a v\u00fdstupn\u00edch kondenz\u00e1tor\u016f je t\u0159eba br\u00e1t v \u00favahu p\u0159edev\u0161\u00edm jejich kapacitu a \u0161\u00ed\u0159ku p\u00e1sma zp\u011btnovazebn\u00ed smy\u010dky. Nejlep\u0161\u00ed je nahl\u00e9dnout do datov\u00e9ho listu, kde jsou uvedeny u\u017eite\u010dn\u00e9 technick\u00e9 informace, nap\u0159\u00edklad minim\u00e1ln\u00ed kapacita vstupn\u00edch kondenz\u00e1tor\u016f, kter\u00e9 by m\u011bly b\u00fdt pou\u017eity pro konkr\u00e9tn\u00ed stabiliz\u00e1tor nap\u011bt\u00ed (nap\u0159. 78L05).<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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78L05 - technick\u00e9 \u00fadaje<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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5V stabiliz\u00e1tor L7805CV - THT TO220 - 5ks.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPOD\u00cdVEJTE SE NA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\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
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Hodnota nap\u011bt\u00ed line\u00e1rn\u00edho stabiliz\u00e1toru 78L05 na v\u00fdstupu je +5V<\/strong>. Naproti tomu maxim\u00e1ln\u00ed v\u00fdstupn\u00ed proud je 0,1 A (100 mA)<\/strong>. Rozsah provozn\u00edch teplot stabiliz\u00e1toru je od -30 \u2103 do +75 \u2103<\/strong> a zaru\u010duje v\u0161estrann\u00e9 pou\u017eit\u00ed a stabiln\u00ed v\u00fdkon v r\u016fzn\u00fdch podm\u00ednk\u00e1ch. <\/p>\n

Teplotn\u00ed rozsah skladov\u00e1n\u00ed popsan\u00e9 elektronick\u00e9 sou\u010d\u00e1stky se pohybuje v rozmez\u00ed od – 55 \u2103 do +150 \u2103<\/strong>. Dal\u0161\u00edm technick\u00fdm parametrem je rozptylov\u00fd v\u00fdkon<\/strong>, kter\u00fd \u010din\u00ed 625 mW.<\/strong> Maxim\u00e1ln\u00ed v\u00fdstupn\u00ed proud 100 mA<\/strong> je dosa\u017een p\u0159i teplot\u011b +25 \u2103.<\/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

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<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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78L05 - n\u00e1zory<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Line\u00e1rn\u00ed regul\u00e1tor nap\u011bt\u00ed 78L05<\/strong> je elektronick\u00e1 sou\u010d\u00e1stka, kter\u00e1 je velmi obl\u00edben\u00e1 nejen u zku\u0161en\u00fdch, ale i u za\u010d\u00ednaj\u00edc\u00edch elektronik\u016f a amat\u00e9r\u016f. D\u016fvodem je mimo jin\u00e9 n\u00edzk\u00e1 cena, spolehliv\u00fd v\u00fdkon a univerz\u00e1ln\u00ed pou\u017eitelnost.<\/strong> \u0160irok\u00fd rozsah pracovn\u00edch teplot<\/strong> (a skladovac\u00edch) line\u00e1rn\u00edho stabiliz\u00e1toru nav\u00edc znamen\u00e1, \u017ee jej lze pou\u017e\u00edt prakticky za jak\u00fdchkoli podm\u00ednek.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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78L05 - cena<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Cena line\u00e1rn\u00edho stabiliz\u00e1toru model 78L05<\/strong> nen\u00ed nijak p\u0159emr\u0161t\u011bn\u00e1, pohybuje se v \u0159\u00e1du n\u011bkolika set korun<\/strong>. U\u017eivatel\u00e9 na opl\u00e1tku z\u00edskaj\u00ed osv\u011bd\u010den\u00fd, spolehliv\u00fd a energeticky \u00fa\u010dinn\u00fd line\u00e1rn\u00ed stabiliz\u00e1tor nap\u011bt\u00ed, kter\u00fd se vyzna\u010duje univerz\u00e1ln\u00ed pou\u017eitelnost\u00ed.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Jak mohu snadno zkontrolovat spr\u00e1vnou funkci line\u00e1rn\u00edho stabiliz\u00e1toru nap\u011bt\u00ed?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Pevn\u00fd line\u00e1rn\u00ed stabiliz\u00e1tor<\/strong> (neregulovan\u00fd) je vybaven t\u0159emi vodi\u010di<\/strong> (vstup, zem a v\u00fdstup<\/strong>). Kontrola spr\u00e1vn\u00e9 funkce t\u00e9to elektronick\u00e9 sou\u010d\u00e1stky vy\u017eaduje p\u0159ipojen\u00ed kondenz\u00e1tor\u016f s odpov\u00eddaj\u00edc\u00ed kapacitou (vstupn\u00ed a v\u00fdstupn\u00ed) a tak\u00e9 kontrolu spr\u00e1vn\u00e9 funkce. 9V baterii<\/strong><\/a>. Krom\u011b toho p\u0159i kontrole stabiliz\u00e1toru pou\u017eijte jednoduch\u00fd multimetr nebo voltmetr.<\/strong><\/a><\/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":"

78L05 je line\u00e1rn\u00ed stabiliz\u00e1tor v krytu TO92. Tato elektronick\u00e1 sou\u010d\u00e1stka je ur\u010dena pro mont\u00e1\u017e THT (Through-Hole Technology). V\u00fdstupn\u00ed proud stabiliz\u00e1toru 78L05 je 0,1 A, v\u00fdstupn\u00ed nap\u011bt\u00ed je +5 V.<\/p>\n","protected":false},"author":22,"featured_media":73090,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[548,549],"tags":[],"class_list":["post-73504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elektronika-cs","category-kompendium-cs"],"acf":[],"yoast_head":"\n78L05 - Co je to? Technick\u00e9 \u00fadaje, sch\u00e9ma, cena a n\u00e1zory - Botland<\/title>\n<meta name=\"description\" content=\"Z\u00e1kladn\u00ed informace o line\u00e1rn\u00edm stabiliz\u00e1toru 78L05. 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