this is information on a product in full production. june 2012 doc id 023045 rev 1 1/7 7 STPS2045CH power schottky rectifier datasheet ? production data features very small conduction losses avalanche rated low forward voltage drop high frequency operation description this device is a dual diode schottky rectifier, suited to high frequency switch mode power supply. packaged in ipak, this device is intended to be used in notebook, game station and desktop adapters, providing in these applications a good efficiency at both low and high load. figure 1. electrical characteristics (a) a. v arm and i arm must respect the reverse safe operating area defined in figure 8 . v ar and i ar are pulse measurements (t p < 10 s). v r , i r , v rrm and v f , are static c haracteristics i f 2 x i o i o i r i ar v f(i o ) v to v f(2xi o ) v f v i i v v r v rrm "re ver se" "forwar d" v ar x x table 1. device summary symbol value i f(av) 2 x 10 a v rrm 45 v t j (max) 175 c v f (max) 0.57 v a1 k a2 k a1 a2 ipak STPS2045CH www.st.com
characteristics STPS2045CH 2/7 doc id 023045 rev 1 1 characteristics when the diodes 1 and 2 are used simultaneously: t j (diode 1) = p(diode1) 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) + 0.015 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 voltage 20 a i f(av) average forward current = 0.5 t c = 155 c per diode 10 a t c = 150 c per package 20 i fsm surge non repetitive forward current t p = 10 ms sine-wave 150 a p arm (1) repetitive peak avalanche power t p = 10 s, t j = 125 c 280 w v arm (2) maximum repetitive peak avalanche voltage t p < 10 s, t j < 125 c, i ar < 4.7 a 60 v v asm (2) maximum single-pulse peak avalanche voltage t p < 10 s, t j < 125 c, i ar < 4.7 a 60 v t stg storage temperature range -65 to + 175 c t j maximum operating junction temperature (3) + 175 c 1. for pulse time duration deratings, please refer to figure 4 . more details regarding the avalanche energy measurements and diode validation in the avalanche are provi ded in the application notes an1768 and an2025. 2. see figure 8 3. condition to avoid thermal r unaway for a diode on its own heatsink dptot dtj < 1 rth(j-a) table 3. thermal resistance parameters symbol parameter value unit r th (j-c) junction to case per diode to t a l 2.50 1.6 c/w r th (c) coupling 0.7 c/w table 4. static electrical characteristics (per diode) symbol parameter tests conditi ons min. typ. max. unit i r (1) reverse leakage current t j = 25 c v r = v rrm 100 a t j = 125 c 7 15 ma v f (2) forward voltage drop t j = 125 c i f = 10 a 0.5 0.57 v t j = 25 c i f = 20 a 0.84 t j = 125 c 0.65 0.72 1. pulse test: t p = 5 ms, < 2% 2. pulse test: t p = 380 s, < 2%
STPS2045CH characteristics doc id 023045 rev 1 3/7 figure 2. average forward power dissipation versus average forward current (per diode) figure 3. junction capacitance versus reverse voltage applied (typical values, per diode) 0 1 2 3 4 5 6 7 8 9 02468101214 i f(av) (a) p f(av) (w) = 0.05 = 0.2 = 0.5 = 0.1 = 1 t = tp/t tp 12 51020 50 100 200 500 1000 c(pf) v (v) r f=1mhz v =30mv t =25c osc rms j figure 4. normalized avalanche power derating versus pulse duration figure 5. relative variation of thermal impedance junction to case versus pulse duration 0.001 0.01 0.1 1 1 10 100 1000 p(t p ) p (10 s) arm arm t (s) p 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.e-04 1.e-03 1.e-02 1.e-01 1.e+00 t p (s) z th(j -c) /r th(j -c) single pulse figure 6. reverse leakage current versus reverse voltage applied (typical values, per diode) figure 7. forward voltage drop versus forward current (per diode) 1.e-01 1.e+00 1.e+01 1.e+02 1.e+03 1.e+04 1.e+05 0 5 10 15 20 25 30 35 40 45 i (a) r v (v) r t =150c j t =125c j t =100c j t =75c j t =50c j t =25c j i (a) fm 1 10 100 1000 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 v (v) fm t =125c (maximum values) j t =125c (typical values) j t =25c (maximum values) j
characteristics STPS2045CH 4/7 doc id 023045 rev 1 figure 8. reverse safe operating area (t p < 10 s and t j < 125 c) figure 9. average forward current versus ambient temperature ( = 0.5, per diode) 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 30 40 50 60 70 80 iarm (a) varm (v) 0 2 4 6 8 10 12 0 25 50 75 100 125 150 175 t amb (c) i f(av) (a) t = tp/t tp r th(j-a) =r th(j-c)
STPS2045CH package information doc id 023045 rev 1 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. table 5. ipak dimensions ref. dimensions millimeters inches min. typ. max. min. typ. max. a 2.20 2.40 0.086 0.094 a1 0.90 1.10 0.035 0.043 a3 0.70 1.30 0.027 0.051 b 0.64 0.90 0.025 0.035 b2 5.20 5.40 0.204 0.212 b3 0.95 0.037 b5 0.30 0.035 c 0.45 0.60 0.017 0.023 c2 0.48 0.60 0.019 0.023 d 6 6.20 0.236 0.244 e 6.40 6.60 0.252 0.260 e2.28 0.090 g 4.40 4.60 0.173 0.181 h 16.10 0.634 l 9 9.40 0.354 0.370 l1 0.8 1.20 0.031 0.047 l2 0.80 1 0.031 0.039 v1 10 10 h l l1 g e b5 b v1 d c a1 a3 a c2 b3 l2 e b2
ordering information STPS2045CH 6/7 doc id 023045 rev 1 3 ordering information 4 revision history table 6. ordering information order code marking package weight base qty delivery mode STPS2045CH s2045ch ipak 0.35 g 75 tube table 7. document revision history date revision changes 21-jun-2012 1 first issue
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