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Regulowany zasilacz impulsowy(step down) - Forum Elektroniczne

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Regulowany zasilacz impulsowy(step down)

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fantek
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Regulowany zasilacz impulsowy(step down)

Postautor: fantek » sob 30 paź 2010, 15:10

Witam.Na jakim układziku da się zrobić zasilacz impulsowy Step down (z płynną regulacją od 0) do 30V i od 0 -3 A?Albo najlepiej ma ktoś może gotowy taki schemacik albo coś z czego mógł bym skorzystać?
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Postautor: rallus » ndz 31 paź 2010, 16:17

Z regulacją napięcia to nie ma żadnego problemu. Bierzesz na przykład układ LM2576T-ADJ i robisz na nim zasilacz z regulowanym napięciem o wydajności prądowej 3A.
Co do regulacji ogranicznika prądowego to ja na razie nie natknąłem się na taki stabilizator impulsowy który by to umożliwiał.
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Re: Regulowany zasilacz impulsowy(step down)

Postautor: SQ5AZP » wt 22 lut 2011, 18:50

Aby uzyskać możliwość regulacji ograniczenia prądu wyjściowego - trzeba do tego układu dołożyć wzm. błędu na LM358.
Ewentualnie zagonić do pracy któryś z regulatorów PWM wyposażonych w dwa wzm. błędu (LM 494 na przykład).
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