this is information on a product in full production. june 2012 doc id 18183 rev 2 1/7 7 STPS2545CT-Y automotive power schottky rectifier datasheet ? production data features very small conduction losses negligible switching losses extremely fast switching low thermal resistance avalanche capability specified aec-q101 qualified 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 voltage, high frequency inverters, free-wheeling and polarity protection in automotive 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 k a2 k a1 a2 to-220ab www.st.com
characteristics STPS2545CT-Y 2/7 doc id 18183 rev 2 1 characteristics when the diodes 1 and 2 are used simultaneously: t j (diode 1) = p(diode 1) x r th(j-c) (per diode) + p(diode 2) x r th(c) to evaluate the conduction losses use the following equation: p = 0.42 x i f(av) + 0.012 x i f 2 (rms) 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 t c = 160 c per diode 12.5 a i fsm surge non repetitive forward current t p = 10 ms sinusoidal 200 a 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 operating junction temperature range (1) 1. condition to avoid thermal runaw ay for a diode on its own heatsink. -40 to + 175 c dv/dt critical rate of rise reverse voltage 10000 v/s table 3. thermal resistances parameters symbol parameter value unit r th (j-c) junction to case per diode 1.6 c/w r th (c) coupling 0.6 c/w table 4. static electrical characteristics (per diode) symbol parameter tests conditions min. typ. max. unit i r (1) 1. pulse test: t p = 380 s, < 2% 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 dptot dtj < 1 rth(j-a)
STPS2545CT-Y characteristics doc id 18183 rev 2 3/7 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 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 ) p (1 s) arm arm 0 0.2 0.4 0.6 0.8 1 1.2 25 50 75 100 125 150 t (c) j p(t j ) p (25 c) arm arm 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 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 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
characteristics STPS2545CT-Y 4/7 doc id 18183 rev 2 figure 7. reverse leakage current versus reverse voltage applied (typical values) figure 8. 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) figure 9. forward voltage drop versus forward current figure 10. 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 circuit board fr4, copper thickness = 35 m
STPS2545CT-Y package information doc id 18183 rev 2 5/7 2 package information epoxy meets ul94, v0 lead-free package 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. note: leads are raw copper on all exposed areas before plating finishing. 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
ordering information STPS2545CT-Y 6/7 doc id 18183 rev 2 3 ordering information table 6. ordering information 4 revision history table 7. document revision history order code marking package weight base qty delivery mode stps2545cty stps2545cty to-220ab 1.9 g 50 tube date revision changes 19-sep-2011 1 first issue. 28-jun-2012 2 corrected typographical error in ta b l e 3 .
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