BU941ZT/BU941ZTfp bub941zt high voltage ignition coil driver npn power darlington n very rugged bipolar technology n built in clamping zener n high operating junction temperature n wide range of packages n surface-mounting d2pak (to-263) power package in tube (no suffix) or in tape & reel (suffix "t4") applications n high ruggedness electronic ignitions ? internal schematic diagram january 1999 1 3 d2pak to-263 1 2 3 to-220 1 2 3 absolute maximum ratings symbol parameter value unit v ceo collector-emitter voltage (i b = 0) 350 v v ebo emitter-base voltage (i c = 0) 5 v i c collector current 15 a i cm collector peak current 30 a i b base current 1 a i bm base peak current 5 a BU941ZT BU941ZTfp bub941zt p tot total dissipation at t c = 25 o c 150 55 150 w t stg storage temperature -65 to 175 -65 to 175 -65 to 175 o c t j max. operating junction temperature 175 175 175 o c to-220fp 1/8
thermal data to-220 d2pak to-220fp r thj-case thermal resistance junction-case max 1 2.7 o c/w electrical characteristics (t case = 25 o c unless otherwise specified) symbol parameter test conditions min. typ. max. unit i ceo collector cut-off current (i b = 0) v ce = 300 v v ce = 300 v t j = 125 o c 100 0.5 m a ma i ebo emitter cut-off current (i c = 0) v eb = 5 v 20 ma v cl * clamping voltage i c = 100 ma 350 500 v v ce(sat) * collector-emitter saturation voltage i c = 8 a i b = 100 ma i c = 10 a i b = 250 ma 1.8 1.8 v v v be(sat) * base-emitter saturation voltage i c = 8 a i b = 100 ma i c = 10 a i b = 250 ma 2.2 2.5 v v h fe * dc current gain i c = 5 a v ce = 10 v 300 v f diode forward voltage i f = 10 a 2.5 v functional test (see fig. 1) v cc = 24 v l= 7 mh 10 a t s t f inductive load storage time fall time (see fig. 3) v cc = 12 v l= 7 mh v clamp = 300v i c = 7 a i b = 70 ma v be = 0 r be = 47 w 15 0.5 m s m s * pulsed: pulse duration = 300 m s, duty cycle 1.5 % safe operating area dc current gain BU941ZT / BU941ZTfp / bub941zt 2/8
dc current gain collector-emitter saturation voltage base-emitter saturation voltage collector-emitter saturation voltage base-emitter saturation voltage collector-emitter saturation voltage BU941ZT / BU941ZTfp / bub941zt 3/8
figure 1: functional test circuit figure 2: functional test waveforms figure 3: switching time test circuit BU941ZT / BU941ZTfp / bub941zt 4/8
dim. mm inch min. typ. max. min. typ. max. a 4.40 4.60 0.173 0.181 c 1.23 1.32 0.048 0.051 d 2.40 2.72 0.094 0.107 d1 1.27 0.050 e 0.49 0.70 0.019 0.027 f 0.61 0.88 0.024 0.034 f1 1.14 1.70 0.044 0.067 f2 1.14 1.70 0.044 0.067 g 4.95 5.15 0.194 0.203 g1 2.4 2.7 0.094 0.106 h2 10.0 10.40 0.393 0.409 l2 16.4 0.645 l4 13.0 14.0 0.511 0.551 l5 2.65 2.95 0.104 0.116 l6 15.25 15.75 0.600 0.620 l7 6.2 6.6 0.244 0.260 l9 3.5 3.93 0.137 0.154 dia. 3.75 3.85 0.147 0.151 p011c to-220 mechanical data BU941ZT / BU941ZTfp / bub941zt 5/8
dim. mm inch min. typ. max. min. typ. max. a 4.4 4.6 0.173 0.181 b 2.5 2.7 0.098 0.106 d 2.5 2.75 0.098 0.108 e 0.45 0.7 0.017 0.027 f 0.75 1 0.030 0.039 f1 1.15 1.7 0.045 0.067 f2 1.15 1.7 0.045 0.067 g 4.95 5.2 0.195 0.204 g1 2.4 2.7 0.094 0.106 h 10 10.4 0.393 0.409 l2 16 0.630 l3 28.6 30.6 1.126 1.204 l4 9.8 10.6 0.385 0.417 l6 15.9 16.4 0.626 0.645 l7 9 9.3 0.354 0.366 ? 3 3.2 0.118 0.126 l2 a b d e h g l6 f l3 g1 123 f2 f1 l7 l4 to-220fp mechanical data BU941ZT / BU941ZTfp / bub941zt 6/8
dim. mm inch min. typ. max. min. typ. max. a 4.4 4.6 0.173 0.181 a1 2.49 2.69 0.098 0.106 b 0.7 0.93 0.027 0.036 b2 1.14 1.7 0.044 0.067 c 0.45 0.6 0.017 0.023 c2 1.21 1.36 0.047 0.053 d 8.95 9.35 0.352 0.368 e 10 10.4 0.393 0.409 g 4.88 5.28 0.192 0.208 l 15 15.85 0.590 0.624 l2 1.27 1.4 0.050 0.055 l3 1.4 1.75 0.055 0.068 l2 l3 l b2 b g e a c2 d c a1 det ail "a" det ail "a" a2 p011p6/e to-263 (d 2 pak) mechanical data BU941ZT / BU941ZTfp / bub941zt 7/8
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