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daniel_smd

Alimentator 5A cu LM317

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O schema de sursa stabilizata 13,8V / 4A este prezentata in revista conexclub nr 6/2004 .Ca regulatoare serie sunt folosite patru circuite

LM 317T ,conectate in paralel . LM317T are protectie termica interna

dar nu are protectie la scurtcircuit.

 

o sursa 1,3-30v 0-5A , cu protectie la scurtcircuit : http://www.cqham.ru/lab.htm

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din ce pricep eu, se poate seta limitearea din potentiometru, deci sursa are protectie la scurt circuit, in sensul ca va limita curentul de scurt in functie de cat e seteat in potentiometru.functionarea e cam asa: se mentine la iesire tensiunea atata timp cat curentul absorbit de sarcina este mai mic decat cel reglat, daca sarcina incearca sa absoarba un curent mai mare decat cel reglat, atunci tensiunea la iesire scade pentru a nu se depasi curentul respectiv.

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