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Forum Elektroniczne • Zasilacz impulsowy 12V 5A Co zastosować?
Strona 1 z 1

Zasilacz impulsowy 12V 5A Co zastosować?

: pt 18 lis 2005, 13:08
autor: Bazyl

: pt 18 lis 2005, 16:55
autor: rallus

: sob 19 lis 2005, 3:37
autor: Bazyl

: ndz 20 lis 2005, 19:58
autor: Gość

: ndz 20 lis 2005, 21:37
autor: rallus

: wt 22 lis 2005, 1:20
autor: DANThE
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.

: wt 22 lis 2005, 21:20
autor: cyberdar
popatrz na LT1076 MAXIMa

: śr 23 lis 2005, 15:57
autor: Kazor

: śr 07 gru 2005, 23:46
autor: Einstein
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.

Przetwornica 12V

: ndz 26 mar 2006, 17:43
autor: aka63
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

: ndz 26 mar 2006, 21:17
autor: movzx
Nota katalogowa i parametry sa fajne... prosze jeszcze powiedziec gdzie to mozna kupic :]
Pozdr.

: pn 27 mar 2006, 21:11
autor: aka63