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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
#11 | scott154 dnia 25.08.2017 18:45:50
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