preliminary data this is preliminary information on a new product now in deve lopment or undergoing evaluation. details are subject to change without notice. march 2010 doc id 17211 rev 1 1/10 10 STD845DN40 dual npn high voltage transi stors in a single package features low v ce(sat) simplified circuit design reduced component count fast switching speed applications compact fluorescent lamp (cfl) 220 v mains electronic ballast fo r fluorescent lighting description the device is a dual npn high voltage power transistor manufactured using multi-epitaxial planar technology. it is housed in dual-island dip- 8 package with separated terminals to provide a high degree of assembly flexibility. figure 1. internal schematic diagram dip-8 1 4 8 table 1. device summary order code marking package packaging STD845DN40 d845dn40 dip-8 tube www.st.com
electrical ratings STD845DN40 2/10 doc id 17211 rev 1 1 electrical ratings table 2. absolute maximum ratings symbol parameter value unit v cbo collector-base voltage (i e = 0) 700 v v ceo collector-emitter voltage (i b = 0) 400 v v ebo emitter-base voltage (i c = 0, i b = 2 a, t p < 10 ms) v (br)ebo v i c collector current 4 a i cm collector peak current (t p < 5 ms) 8 a i b base current 2 a i bm base peak current (t p < 5 ms) 4 a p tot total dissipation at t amb = 25 c single transistor tbd w total dissipation at t amb = 25 c both transistors tbd 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 thja (1) 1. when mounted on 1 inch square pad of 2 oz. copper, t 10 sec. thermal resistance junction-ambient (single transistor) tbd c/w thermal resistance junction-ambient (both transistors) tbd c/w
STD845DN40 electrical characteristics doc id 17211 rev 1 3/10 2 electrical characteristics t case = 25 c unless otherwise specified. table 4. electrical characteristics symbol parameter test conditions min. typ. max. unit i ces collector cut-off current (v be = 0) v ce = 700 v v ce = 700 v t c = 125 c 100 500 a a i ceo collector cut-off current (i b = 0) v ce = 400 v 250 a v (br)ebo emitter-base breakdown voltage (i c = 0) i e = 10 ma 9 18 v v ceo(sus) (1) collector-emitter sustaining voltage (i b = 0) i c = 100 ma 400 v v ce(sat) (1) 1. pulse test: pulse duration 300 s, duty cycle 2 %. collector-emitter saturation voltage i c = 0.5 a i b = 0.1 a i c = 1 a i b = 0.2 a i c = 2.5 a i b = 0.5 a i c = 4 a i b = 1 a 0.5 0.7 1 1.5 v v v v v be(sat) (1) base-emitter saturation voltage i c = 0.5 a i b = 0.1 a i c = 1 a i b = 0.2 a i c = 2.5 a i b = 0.5 a 1.1 1.2 1.3 v v v h fe (1) dc current gain i c = 10 ma v ce = 5 v i c = 2 a v ce = 5 v 10 12 32 v f diode forward voltage i f = 2 a 2.5 v t s t f resistive load storage time fall time i c = 2 a i b(on) = - i b(off) = 400 ma v cc = 125 v t p = 30 s 2.5 0.2 s s t s t f inductive load storage time fall time i c = 2 a, v cc = 200 v v be(off) = - 5 v i b(on) = 400 ma r bb = 0, l = 200 h 0.6 0.1 s s
electrical characteristics STD845DN40 4/10 doc id 17211 rev 1 2.1 electrical characteristics (curves) figure 2. dc current gain (v ce = 1.5 v) figure 3. dc current gain (v ce = 5 v) figure 4. collector-emitter saturation voltage figure 5. base-emitter saturation voltage figure 6. inductive load fall time fi gure 7. inductive load storage time
STD845DN40 electrical characteristics doc id 17211 rev 1 5/10 figure 8. resistive load fall time figure 9. resistive load storage time figure 10. reverse biased safe operating area
test circuits STD845DN40 6/10 doc id 17211 rev 1 3 test circuits 1. fast electronic switch 2. non-inductive resistor 1. fast electronic switch 2. non-inductive resistor 3. fast recovery rectifier figure 11. resistive load switching test circuit figure 12. inductive load switching test circuit
STD845DN40 package mechanical data doc id 17211 rev 1 7/10 4 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. table 5. dip-8 mechanical data dim. mm. min. typ. max. a 4.80 a1 0.50 a2 3.10 3.50 a3 1.40 1.60 b 0.38 0.55 b1 0.38 0.51 b2 1.47 1.57 b3 0.89 1.09 c 0.21 0.35 c1 0.20 0.30 d 9.10 9.30 d1 0.13 e 7.62 8.25 e1 6.25 6.45 e2.54 ea 7.62 eb 7.62 10.90 ec 0 1.52 l 2.92 3.81
package mechanical data STD845DN40 8/10 doc id 17211 rev 1 figure 13. drawing dimension dip-8 8145726_a
STD845DN40 revision history doc id 17211 rev 1 9/10 5 revision history table 6. document revision history date revision changes 03-mar-2010 1 initial release.
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