may 2009 doc id 15263 rev 3 1/10 10 BUL743 high voltage fast-switching npn power transistor features low spread of dynamic parameters high voltage capability minimum lot-to-lot spread for reliable operation very high switching speed applications electronic ballast for fluorescent lighting up to 256 w (8 x 32 w) switch mode power supplies description the device is manufactured using the diffused collector in planar technology adopting new and enhanced high voltage structure. it has an intrinsic ruggedness which enables the transistor to withstand an high collector current level during breakdown condition, without using the transil protection usually necessary in typical converters for lamp ballast. figure 1. internal schematic diagram to-220 1 2 3 table 1. device summary order code marking package packaging BUL743 BUL743 to-220 tube www.st.com
electrical ratings BUL743 2/10 doc id 15263 rev 3 1 electrical ratings table 2. absolute maximum ratings symbol parameter value unit v ces collector-emitter voltage (v be = 0) 1200 v v ceo collector-emitter voltage (i b = 0) 500 v v ebo emitter-base voltage (i c = 0, i b = 6 a, t p < 10 ms) v (br)ebo v i c collector current 12 a i cm collector peak current (t p < 5 ms) 24 a i b base current 6 a i bm base peak current (t p < 5 ms) 12 a p tot total dissipation at t c = 25 c 100 w t stg storage temperature -65 to 150 c t j max. operating junction temperature 150 c table 3. thermal data symbol parameter value unit r thj-case thermal resistance junction - case 1.25 c/w r thj-amb thermal resistance junction - ambient 62.5 c/w
BUL743 electrical characteristics doc id 15263 rev 3 3/10 2 electrical characteristics (t case = 25 c unless otherwise specified) table 4. electrical characteristics symbol parameter test cond itions min. typ. max. unit i ces collector cut-off current (v be = 0) v ce = 1200 v 0.2 10 a i ceo collector cut-off current (i b = 0) v ce = 500 v 10 250 a v (br)ebo emitter base breakdown voltage (i c = 0) i e = 1 ma 15 19 24 v v ceo(sus) (1) 1. pulsed duration = 300 s, duty cycle 1.5% collector-emitter sustaining voltage (i b = 0) i c = 50 ma 500 v v ce(sat) (1) collector-emitter saturation voltage i c = 3 a _ i b = 0.6 a i c = 10 a _ _ i b = 2.5 a 0.15 0.6 0.5 1.5 v v v be(sat) (1) base-emitter saturation voltage i c = 10 a i b = 2.5 a 1.1 1.5 v h fe (1) dc current gain i c = 0.5 a _ v ce = 5 v i c = 2 a _ _ v ce = 3 v 35 24 55 34 80 45 t s t f resistive load storage time fall time i c = 6 a v cc = 125 v i b(on) = -i b(off) = 1.2 a t p = 300 s v be(off) = -5 v 2.5 400 3.8 500 s ns e ar repetitive avalanche energy l = 2 mh c = 1.8 nf v be(off) = -5 v 3 mj
electrical characteristics BUL743 4/10 doc id 15263 rev 3 2.1 electrical characteristics (curves) figure 2. safe operating area figure 3. derating curve figure 4. dc current gain (v ce = 3 v) figure 5. dc current gain (v ce = 5 v) figure 6. collector-emitter saturation voltage figure 7. base-emitter saturation voltage
BUL743 electrical characteristics doc id 15263 rev 3 5/10 figure 8. output characteristics figure 9. reverse biased safe operating area figure 10. resistive load switching time (on) fi gure 11. resistive load switching time (off)
electrical characteristics BUL743 6/10 doc id 15263 rev 3 2.2 test circuits figure 12. energy rating test circuit figure 13. resistive load switching test circuit 1. fast electronic switch 2. non-inductive resistor
BUL743 package mechanical data doc id 15263 rev 3 7/10 3 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
package mechanical data BUL743 8/10 doc id 15263 rev 3 to-220 mechanical data dim mm inch min typ max min typ max a 4.40 4.60 0.17 3 0.1 8 1 b 0.61 0. 88 0.024 0.0 3 4 b 1 1.14 1.70 0.044 0.066 c0.4 8 0.70 0.01 9 0.027 d 15.25 15.75 0.6 0.62 d1 1.27 0.050 e 10 10.40 0. 393 0.40 9 e 2.40 2.70 0.0 9 4 0.106 e1 4. 9 5 5.15 0.1 9 4 0.202 f1.2 3 1. 3 2 0.04 8 0.051 h1 6.20 6.60 0.244 0.256 j1 2.40 2.72 0.0 9 4 0.107 l1 3 14 0.511 0.551 l1 3 .50 3 . 93 0.1 3 7 0.154 l20 16.40 0.645 l 3 02 8 . 9 0 1.1 3 7 ? p 3 .75 3 . 8 5 0.147 0.151 q2.65 2. 9 5 0.104 0.116
BUL743 revision history doc id 15263 rev 3 9/10 4 revision history table 5. document revision history date revision changes 09-dec-2008 1 first release 20-mar-2009 2 added section 2.1section 2.1: electrical characteristics (curves) on page 4 25-may-2009 3 document status promoted from preliminary data to datasheet
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