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drukuj komentujRegulowany zasilacz stabilizowany 1,3-25V 3A

Regulowany zasilacz stabilizowany 1,3-25V 3A

W pracowni elektronicznej zasilacz jest jednym z najbardziej podstawowych i obowiązkowych przyrządów. Niestety profesjonalne zasilacze serwisowe są bardzo drogie. Warto więc zbudować zasilacz o parametrach nieco gorszych od sprzętu "z najwyższej półki" za kilka procent ceny tych pierwszych.
Zasilacz ten jest klasyczną aplikacją scalonego stabilizatora o dobieranym napięciu dodatnim. Zamiast mostka Graetza zastosowano tu dwie diody pracujące w układzie podwajacza napięcia. Dzięki podwajaczowi możliwe jest uzyskanie sporego napięcia maksymalnego przy zastosowaniu popularnych transformatorów toroidalnych o napięciu wtórnym 12V. Układ LM350 jest wyposażony w ogranicznik nadprądowy i zabezpieczenie termiczne. Użytkowanie zasilacza jest więc bezpieczne i bezproblemowe.

Wykaz elementów :
R1 : 220om
P1 : 4,7kom
C1,C3,C7 : 100nF
C2,C4 : 4700uF/25V
C5 : 10uF/35V
C6 : 1000uF/35V
D1,D2 : dowolne 4A
U1 : LM350 (parametry i opis wyprowadzeń)
Tr : transformator toroidalny 12V


schemat ideowy schemat ideowy
Oznaczenie: RS03B
Opracowanie: Roman Sendela
Rok powstania: 1996
Literatura: P.Horowitz, W.Hill "Sztuka elektroniki"


Komentarze
#1 | elektronik dnia 13.02.2006 15:13:22
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Czy transformator toroidalny można zastąpicd zwykłym??SmutnySmutnySmutny
#2 | eres dnia 13.02.2006 16:24:59
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W układzie można zastosować zarówno transformator toroidalny jak i zwykły (EI lub inny).
#3 | m_goc dnia 20.01.2007 10:05:27
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Zbudowałem ten układ stosując jednak trafo 'bezpieczeństwa' 24V zastępując układ powielacza napięcia pojedynczym kondensatorem 4700u/40V. Niby wszystko wydaje się działać poprawnie tylko regulacja napięcia potencjometrem jest bardzo niedokładna na zakresie poniżej 15V (uzyskałem bez obciążenia max 30V). Czy można jakoś ulepszyć tę regulację bez stosowania przełączników wielopozycyjnych ???
#4 | piotruuch dnia 18.05.2010 17:28:20
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Witam! A czy da się regulować ogranicznik prądowy?
#5 | dsbaadsvb dnia 16.07.2010 10:17:01
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Zbudowałem ten zasilacz i mogę regulować napięcie tylko od około 18v do 23v i lm350 w ogóle się nie grzeje. Co może być przyczyną?
#6 | Lemuel dnia 29.09.2010 18:23:13
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sprawdź jeszcze raz wartość rezystora R1 i potencjometr
#7 | ctzl dnia 21.04.2014 03:55:24
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Kiedyś potrzebowałem takiego zasilacza, szkoda że za późno go znalazłem. Może skusiłbym się żeby to zrobić?
#8 | binasa dnia 29.06.2017 23:58:08
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#9 | binasa dnia 23.07.2017 20:35:32
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