bu941z/bu941zp BU941ZPFI high voltage ignition coil driver npn power darlington transistor n very rugged bipolar technology n built in clamping zener n high operating junction temperature n wide range of packages n fully insulated package (u.l. compliant) for easy mounting applications n high ruggedness electronic ignitions description the devices are bipolar darlington transistors manufactured using multiepitaxial planar technology. they have been properly designed to be used in automotive environment as electronic ignition power actuators. internal schematic diagram april 2002 absolute maximum ratings symbol parameter value unit bu941z bu941zp BU941ZPFI 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 p tot total dissipation at t c = 25 o c 180 155 65 w v isol insulation withstand voltage (rms) from all three leads to exernal heatsink 2500 v t stg storage temperature -65 to 200 -65 to 175 -65 to 175 o c t j max. operating junction temperature 200 175 175 o c for to-3 emitter: pin 2 base: pin1 collector: tab 1 2 3 to-218 isowatt218 1 2 3 1 2 to-3 ? 1/8
thermal data to-3 to-218 isowatt218 r thj-case thermal resistance junction-case max 0.97 0.97 2.3 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 c = 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 i c = 12 a i b = 300 ma 1.8 1.8 2 v 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 i c = 12 a i b = 300 ma 2.2 2.5 2.7 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 v cc = 24 v l = 7 mh (see fig. 1) 10 a t s t f inductive load storage time fall time v cc = 12 v l = 7 mh v be = 0 r be = 47 w v clamp = 300 v i c = 7 a i b = 70 ma (see fig. 3) 15 0.5 m s m s * pulsed: pulse duration = 300 m s, duty cycle 1.5 % safe operating areas derating curves (to-3) bu941z/bu941zp/BU941ZPFI 2/8
derating curves (to-218/isowatt218) dc current gain collector-emitter saturation voltage dc current gain collector-emitter saturation voltage base-emitter saturation voltage bu941z/bu941zp/BU941ZPFI 3/8
base-emitter saturation voltage collector-emitter saturation voltage figure 1: functional test circuit figure 2: functional test waveforms figure 3: switching time test circuit bu941z/bu941zp/BU941ZPFI 4/8
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 bu941z/bu941zp/BU941ZPFI 5/8
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 bu941z/bu941zp/BU941ZPFI 6/8
dim. mm inch min. typ. max. min. typ. max. a 5.35 5.65 0.211 0.222 c 3.30 3.80 0.130 0.150 d 2.90 3.10 0.114 0.122 d1 1.88 2.08 0.074 0.082 e 0.75 0.95 0.030 0.037 f 1.05 1.25 0.041 0.049 f2 1.50 1.70 0.059 0.067 f3 1.90 2.10 0.075 0.083 g 10.80 11.20 0.425 0.441 h 15.80 16.20 0.622 0.638 l 9 0.354 l1 20.80 21.20 0.819 0.835 l2 19.10 19.90 0.752 0.783 l3 22.80 23.60 0.898 0.929 l4 40.50 42.50 1.594 1.673 l5 4.85 5.25 0.191 0.207 l6 20.25 20.75 0.797 0.817 n 2.1 2.3 0.083 0.091 r 4.6 0.181 dia 3.5 3.7 0.138 0.146 p025c/a isowatt218 mechanical data - weight : 4.9 g (typ.) - maximum torque (applied to mounting flange) recommended: 0.8 nm; maximum: 1 nm - the side of the dissipator must be flat within 80 m m bu941z/bu941zp/BU941ZPFI 7/8
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectroni cs. specifi cation mentio ned in this publication are subject to change without notice. this publication supersedes and replaces all in formation previou sly supplied. stmicroe lectron ics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectron ics. the st logo is a trademark of stmicroelectronics ? 2002 stmicroelectronics C pr inted in italy C all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco - singapore - spain - sweden - switzerland - united kingdom - united states. http://www.st.com bu941z/bu941zp/BU941ZPFI 8/8
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