june 2010 doc id 8736 rev 3 1/10 10 stps2545c power schottky rectifier features very small conduction losses negligible switching losses extremely fast switching low thermal resistance avalanche capability specified ecopack ? 2 compliant component (stps2545ct) description dual center tab schottky re ctifier suited for switch mode power supplies and high frequency dc to dc converters. this device is especially intended for use in low volage, high frequency inverters, free-wheeling and polarity protection applications. table 1. device summary symbol value i f(av) 2 x 12.5 a v rrm 45 v t j (max) 175 c v f(max) 0.57 v a1 a2 k a1 a2 k a1 a2 k a1 a2 k to-220fpab STPS2545CFP d 2 pa k stps2545cg to-220ab stps2545ct www.st.com
characteristics stps2545c 2/10 doc id 8736 rev 3 1 characteristics when the diodes 1 and 2 are used simultaneously : tj(diode 1) = p(diode1) x r th(j-c) (per diode) + p(diode 2) x r th(c) table 2. absolute ratings (limiting values, per diode) symbol parameter value unit v rrm repetitive peak reverse voltage 45 v i f(rms) forward rms current 30 a i f(av) average forward current = 0.5 to-220ab d 2 pa k t c =160 c per diode 12.5 a to-220fpab t c =140 c per device 25 i fsm surge non repetitive forward current t p = 10 ms sinusoidal 200 a i rrm repetitive peak reverse current t p = 2 s square f=1 khz 1 a i rsm non repetitive peak reverse current t p = 100 s square 2a p arm repetitive peak avalanche power t p = 1 s t j = 25 c 4800 w t stg storage temperature range -65 to + 175 c t j maximum operating junction temperature (1) 175 c dv/dt critical rate of rise reverse voltage 10000 v/s 1. condition to avoid thermal r unaway for a diode on its own heatsink dptot dtj < 1 rth(j-a) table 3. thermal resistances symbol parameter value unit r th (j-c) junction to ambient to-220ab / d 2 pak per diode 1.6 c/w to-220fpab 4 to-220ab / d 2 pak total 1.1 c/w to-220fpab 3.5 r th (c) coupling to-220ab / d 2 pa k 0 . 6 c/w to-220fpab 3
stps2545c characteristics doc id 8736 rev 3 3/10 to evaluate the conduction losses use the following equation : p = 0.42 x i f(av) + 0.012 x i f 2 (rms) table 4. static electrical characteristics (per diode) symbol parameter tests conditions min. typ. max. unit i r (1) reverse leakage current t j = 25 c v r = v rrm 125 a t j = 125 c 9 25 ma v f (1) forward voltage drop t j = 125 c i f = 12.5 a 0.50 0.57 v t j = 25 c i f = 25 a 0.84 t j = 125 c i f = 25 a 0.65 0.72 1. pulse test : t p = 380 s, < 2% figure 1. conduction losses versus average current) figure 2. average forward current versus ambient temperature ( = 0.5) 0 1 2 3 4 5 6 7 8 9 10 0.0 2.5 5.0 7.5 10.0 12.5 15.0 i (a) f(av) = 0.05 = 0.1 = 0.2 = 0.5 = 1 p (w) f(av) t =tp/t tp 0 2 4 6 8 10 12 14 0 25 50 75 100 125 150 175 t (c) amb rth (j-a) =rth (j-c) rth (j-a) =50c/w to-220ab/d2pak i (a) f(av) t =tp/t tp figure 3. normalized avalanche power derating versus pulse duration figure 4. normalized avalanche power derating versus junction temperature 0.001 0.01 0.1 0.01 1 0.1 10 100 1000 1 t (s) p p(t) p (1s) arm p arm 0 0.2 0.4 0.6 0.8 1 1.2 0 25 50 75 100 125 150 t (c) j p(t) p (25c) arm p arm
characteristics stps2545c 4/10 doc id 8736 rev 3 figure 5. non repetitive surge peak forward current versus overload duration (maximum values) figure 6. relative variation of thermal impedance junction to case versus pulse duration (to-220fpab) 0 20 40 60 80 100 120 140 160 180 200 1.e-03 1.e-02 1.e-01 1.e+00 t(s) t c =25c t c =75c t c =125c i (a) m i m t =0.5 to-220ab, d pak 2 0 20 40 60 80 100 120 1.e-03 1.e-02 1.e-01 1.e+00 t(s) t c =25c t c =75c t c =125c i (a) m i m t =0.5 figure 7. relative variation of thermal impedance junction to case versus pulse duration (to-220ab, d 2 pak) figure 8. relative variation of thermal impedance junction to case versus pulse duration (to-220fpab) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.e-03 1.e-02 1.e-01 1.e+00 t (s) p zth(j-c) / rth(j-c) = 0.5 = 0.2 = 0.1 single pulse t =tp/t tp 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.e-03 1.e-02 1.e-01 1.e+00 1.e+01 t (s) p = 0.5 = 0.2 = 0.1 single pulse zth(j-c) / rth(j-c) t =tp/t tp figure 9. reverse leakage current versus reverse voltage applied (typical values) figure 10. junction capacitance versus reverse voltage applied (typical values) 1.e-03 1.e-02 1.e-01 1.e+00 1.e+01 1.e+02 0 5 10 15 20 25 30 35 40 45 v (v) r t j =150c t j =125c t j =25c t j =100c t j =75c t j =50c i (ma) r 0.1 1.0 10.0 1 10 100 v (v) r f=1mhz v osc =30mv t j =25c c(nf)
stps2545c characteristics doc id 8736 rev 3 5/10 figure 11. forward voltage drop versus forward current figure 12. thermal resistance junction to ambient versus copper surface under tab 1 10 100 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 v (v) fm t j =25c (maximum values) t j =125c (maximum values) t j =125c (maximum values) t j =125c (typical values) t j =125c (typical values) i (a) fm 0 10 20 30 40 50 60 70 80 0 5 10 15 20 25 30 35 40 s(cm2) rth(j-a)(c/w) epoxy printed board fr4, cu = 35 m
package information stps2545c 6/10 doc id 8736 rev 3 2 package information epoxy meets ul94, v0 lead-free packages 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. to-220ab dimensions ref. dimensions millimeters inches min. max. min. 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 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 0.066 f2 1.14 1.70 0.044 0.066 g 4.95 5.15 0.194 0.202 g1 2.40 2.70 0.094 0.106 h2 10 10.40 0.393 0.409 l2 16.4 typ. 0.645 typ. l4 13 14 0.511 0.551 l5 2.65 2.95 0.104 0.116 l6 15.25 15.75 0.600 0.620 l7 6.20 6.60 0.244 0.259 l9 3.50 3.93 0.137 0.154 m 2.6 typ. 0.102 typ. diam. 3.75 3.85 0.147 0.151 a c d l7 dia l5 l6 l9 l4 f h2 g g1 l2 f2 f1 e m
stps2545c package information doc id 8736 rev 3 7/10 table 6. to-220fpab dimensions ref. dimensions millimeters inches min. max. min. 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 0.70 0.018 0.027 f 0.75 1 0.030 0.039 f1 1.15 1.70 0.045 0.067 f2 1.15 1.70 0.045 0.067 g 4.95 5.20 0.195 0.205 g1 2.4 2.7 0.094 0.106 h 10 10.4 0.393 0.409 l2 16 typ. 0.63 typ. l3 28.6 30.6 1.126 1.205 l4 9.8 10.6 0.386 0.417 l5 2.9 3.6 0.114 0.142 l6 15.9 16.4 0.626 0.646 l7 9.00 9.30 0.354 0.366 dia. 3.00 3.20 0.118 0.126 h a b dia l7 l6 l5 f1 f2 f d e l4 g1 g l2 l3
package information stps2545c 8/10 doc id 8736 rev 3 figure 13. footprint (dimensions in mm) table 7. d 2 pak dimensions ref. dimensions millimeters inches min. max. min. max. a 4.40 4.60 0.173 0.181 a1 2.49 2.69 0.098 0.106 a2 0.03 0.23 0.001 0.009 b 0.70 0.93 0.027 0.037 b2 1.14 1.70 0.045 0.067 c 0.45 0.60 0.017 0.024 c2 1.23 1.36 0.048 0.054 d 8.95 9.35 0.352 0.368 e 10.00 10.40 0.393 0.409 g 4.88 5.28 0.192 0.208 l 15.00 15.85 0.590 0.624 l2 1.27 1.40 0.050 0.055 l3 1.40 1.75 0.055 0.069 m 2.40 3.20 0.094 0.126 r 0.40 typ. 0.016 typ. v2 0 8 0 8 g l l3 l2 b b2 e * flat zone no less than 2m m a c2 d r a2 m v2 c a1 * 16.90 10.30 8.90 3.70 5.08 1.30
stps2545c ordering information doc id 8736 rev 3 9/10 3 ordering information 4 revision history table 8. ordering information order code marking package weight base qty delivery mode stps2545ct stps2545ct to-220ab 2.20 g 50 tube STPS2545CFP STPS2545CFP to-220fpab 2.0 g 50 tube stps2545cg stps2545cg d 2 pak 1.48 g 50 tube stps2545cg-tr stps2545cg d 2 pak 1.48 g 1000 tape and reel table 9. document revision history date revision changes july-2003 2a last release. 21-jun-2010 3 updated ecopack statement.
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