... in ỏp ra, dũng ra, h s n nh in ỏp, kh nng iu chnh in ỏp ra, di nhit lm vic, ngun cung cp, n nh theo thi gian.v.v m ngi ta ch to nhiu loi khỏc Thit k mch ngun DC cú in ỏp thay i 0-5v, 3A 15 ... DC cú in ỏp thay i 0-5v, 3A 18 Lờ Th Thu Tho MSSV: 0850020070 n Hỡnh 2.4: S n ỏp dựng LM317 in ỏp cú th iu chnh c nh bin tr thay i t 0V-5V Thit k mch ngun DC cú in ỏp thay i 0-5v, 3A 19 Lờ Th ... 0850020070 n Hỡnh 3.3: IC n ỏp dựng thờm transistor ngoi tng dũng s dng Do dũng l 3A ta phi s dng mt transistor cú kh nng chu c dũng ln hn hoc bng 3A õy ta s s dng transistor TIP42C kộo dũng, vỡ dũng...