?a?????t 3DA4544 ??????1?????????e???1 ?t?y?a???1ye?t1??? 1 ?????? 3DA4544 1 npn e??? ???1?1| a? ?1 ? 2?? ?? ?3??a ?ee ???a ?? ????a ?????1?? ?a??e? o?1??? ae?? t o -220f 2 ??e? 2.1 ???t? 3y?e1?? t am b = 25 2? y ?? 3? ?o? ???? ??? ???? - ? ????1 v cb0 3 0 0 v ???? - l?????1 v ce0 3 0 0 v l??? - ? ????1 v eb0 7 v ????? i c 0 . 1 a ta = 2 5 2 o?1|a tc = 2 5 p tot 10 w ??a t j 1 5 0 ???a? t stg - 5 5 150 2. 55 10 0. 1 3.2 13 .2 0. 1 0. 6 2. 55 b c e 15 0. 1 0. 6 0.0 5 4. 5 2. 3 0.1 2. 7 2.2 ?2?y 3y?e1?? t am b = 25 1? ? ? 2? y ?? 3? ? o? 2a ? ? ?t ?e? ?e ?? ??? ???? - ??????1? i cb0 v cb =300v , i e = 0 1 a l??? - ??????1? i eb0 v eb =7v , i c = 0 1 a 12l????y????? ??2?? h fe v ce =10v i c =20m a 3 0 2 0 0 ???? - l???o??1 v cesat i c =10m a, i b =1m a 1 v ???a f t v ce =10v , i c =20m a 5 0 m h z a?3?2a? tp 300 s, 2% h fe ?? r 30---80 o 60---120 y 100---200 ?? ?-????t?yeo?aa 14 o? ?? 05 10 58 07 22 8-22 68 229 9 ??? 05 10 580 03 60 ? 1 3 12 2 3
?a?????t 3DA4544 3 ?e???? 10 0 0 50 0. 1 0.0 1 10 0 10 1 0. 001 0 t c ( ) p tot (w) i c (a) v ce (v) 2 4 6 8 2?1?? ( ? ) p tot - t 1????? t case =25 p tot -t case p tot -t am 0.001 10 1 0.01 0.1 ic (a) 10 0 0.01 0.001 0.1 0.01 ic (a) 1 v ce sa t (v) h fe h fe - i c 1????? v cesat - i c 1????? t am b =25 v ce =10v t am b =25 i c /i b =10 ? 2 3 12 2 3
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