BU931 BU931p high voltage ignition coil driver npn power darlington n very rugged bipolar technology n high operating junction temperature n wide range of packages applications n high ruggedness electronic ignitions ? internal schematic diagram september 1999 for to-3 emitter: pin 2 base: pin1 collector: tab 1 2 3 to-3 to-218 1 2 absolute maximum ratings symbol parameter value unit BU931 BU931p v ces collector-emitter voltage (v be = 0) 500 v v ceo collector-emitter voltage (i b = 0) 400 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 p tot total dissipation at t c = 25 o c 175 135 w t stg storage temperature -65 to 200 -65 to 175 o c t j max. operating junction temperature 200 175 o c 1/7
thermal data to-3 to-218 r thj-case thermal resistance junction-case max 1 1.1 o c/w electrical characteristics (t case = 25 o c unless otherwise specified) symbol parameter test conditions min. typ. max. unit i ces collector cut-off current (v be = 0) v ce = 500 v v ce = 500 v t j = 125 o c 100 0.5 m a ma i ceo collector cut-off current (i b = 0) v ce = 450 v v ce = 450 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 ceo(sus) * collector-emitter sustaining voltage (i b = 0) i c = 100 ma l = 10 mh v clamp = 400 v (see fig.4) 400 v v ce(sat) * collector-emitter saturation voltage i c = 7 a i b = 70 ma i c = 8 a i b = 100 ma i c = 10 a i b = 250 ma 1.6 1.8 1.8 v v v v be(sat) * base-emitter saturation voltage i c = 7 a i b = 70 ma i c = 8 a i b = 100 ma i c = 10 a i b = 250 ma 2.2 2.4 2.5 v 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 v clamp = 400 v l = 7 mh 8a t s t f inductive load storage time fall time (see fig. 3) v cc = 12 v v clamp = 300 v l = 7 mh 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 BU931 / BU931p 2/7
collector emitter saturation voltage collector emitter saturation voltage base emitter saturation voltage collector emitter saturation voltage base emitter saturation voltage switching time inductive load BU931 / BU931p 3/7
figure 1: functional test circuit figure 2: functional test waveforms figure 3: switching time test circuit figure 4: sustaining voltage test circuit BU931 / BU931p 4/7
dim. mm inch min. typ. max. min. typ. max. a 11.00 13.10 0.433 0.516 b 0.97 1.15 0.038 0.045 c 1.50 1.65 0.059 0.065 d 8.32 8.92 0.327 0.351 e 19.00 20.00 0.748 0.787 g 10.70 11.10 0.421 0.437 n 16.50 17.20 0.649 0.677 p 25.00 26.00 0.984 1.023 r 4.00 4.09 0.157 0.161 u 38.50 39.30 1.515 1.547 v 30.00 30.30 1.187 1.193 e b r c d a p g n v u o p003f to-3 mechanical data BU931 / BU931p 5/7
dim. mm inch min. typ. max. min. typ. max. a 4.7 4.9 0.185 0.193 c 1.17 1.37 0.046 0.054 d2.5 0.098 e 0.5 0.78 0.019 0.030 f 1.1 1.3 0.043 0.051 g 10.8 11.1 0.425 0.437 h 14.7 15.2 0.578 0.598 l2 C 16.2 C 0.637 l3 18 0.708 l5 3.95 4.15 0.155 0.163 l6 31 1.220 r C 12.2 C 0.480 ? 4 4.1 0.157 0.161 r a c d e h f g l6 l3 l2 l5 1 2 3 to-218 (sot-93) mechanical data p025a BU931 / BU931p 6/7
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