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Zasilacz impulsowy 12V 5A Co zastosować? - Forum Elektroniczne

Zasilacz impulsowy 12V 5A Co zastosować?

Zadaj tu pytanie, jeśli nie wiesz w jaki sposób zrobić układ realizujący założone funkcje.
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Bazyl
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Zasilacz impulsowy 12V 5A Co zastosować?

Postautor: Bazyl » pt 18 lis 2005, 13:08


rallus
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Postautor: rallus » pt 18 lis 2005, 16:55


Bazyl
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Postautor: Bazyl » sob 19 lis 2005, 3:37


Gość
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Postautor: Gość » ndz 20 lis 2005, 19:58

Załączniki
Zasilacz L4960.pdf
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rallus
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Postautor: rallus » ndz 20 lis 2005, 21:37


DANThE
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Postautor: DANThE » wt 22 lis 2005, 1:20

Miałem kiedyś podobny problem. Potrzebowałem 12V 1A przy zasilaniu w samochodzie. Użyłem układu L4960 jak na schemacie tylko bez tranzystora BD 912. Oczywiście diody były impulsowe, na schemacie pominąłem elementy RC generatora - wszystko było jak w typowej aplikacji. Tranzystor BD 912 powinien zwiększyć wydajność prądową zasilacza, jednak nie będzie wtedy działało zabezpieczenie przeciwzwarciowe układu.

PS. Sorki za brzydki schemat, ale musiałem go zrobić w paintcie.
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L4960step up_down.gif
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cyberdar
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Postautor: cyberdar » wt 22 lis 2005, 21:20

popatrz na LT1076 MAXIMa

Kazor
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Postautor: Kazor » śr 23 lis 2005, 15:57


Einstein
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Postautor: Einstein » śr 07 gru 2005, 23:46

Jak pisał poprzednik nie da się zrobić przetwornicy step-up i step-down jednocześnie. Moja propozycja zrobić przetwornicę Boosta (step-up) na wejściu podnosząc napięcie do wartości np 20V i potem przetwornicę Backa (step-down) i na wy będzie 12V. Proponuję układ MC34063.

aka63
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Przetwornica 12V

Postautor: aka63 » ndz 26 mar 2006, 17:43

Też szukałem takiego rozwiązania tyle że na większy prąd. I tez byłem "obciązony" teorią buck, boost itd. I tak z tym, żę nie da się zrobić przetwornicy o parametrach 10-14 i wyjście 12 to bzdura. Wystarczy spojrzeć na notę katalogową LTC 3780. Jest to prztwornica o fantastycznych parametrach: wejście 4V-36V, wyjście 12V 5A i sprawność do 98%!!!. Czy ktoś poszukuje lepszego rozwiązania. Mnie te parametry "powaliły" na kolana

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Postautor: movzx » ndz 26 mar 2006, 21:17

Nota katalogowa i parametry sa fajne... prosze jeszcze powiedziec gdzie to mozna kupic :]
Pozdr.

aka63
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Postautor: aka63 » pn 27 mar 2006, 21:11



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