this is information on a product in full production. april 2012 doc id 022917 rev 1 1/9 9 STPS40SM120C power schottky rectifier datasheet ? production data features high current capability avalanche rated low forward voltage drop high frequency operation description this schottky diode is suited for high frequency switch mode power supply. packaged in to-220ab, to-220ab narrow leads and i 2 pak, 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 9 . 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 "reverse" "forward" v ar x x table 1. device summary symbol value i f(av) 2 x 20 a v rrm 120 v t j (max) 150 c v f (typ) 0.46 v a1 k a2 i 2 pak STPS40SM120Cr to-220ab narrow leads STPS40SM120Ctn a1 a2 k k to-220ab STPS40SM120Ct a1 a2 k k k a1 k a2 www.st.com
characteristics STPS40SM120C 2/9 doc id 022917 rev 1 1 characteristics when the two 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) table 2. absolute ratings (limiting values per diode at t amb = 25 c, unless otherwise specified) symbol parameter value unit v rrm repetitive peak reverse voltage 120 v i f(rms) forward rms current 30 a i f(av) average forward current, = 0.5 per diode t c = 125 c 20 a per device t c = 115 c 40 i fsm surge non repetitive forward current t p = 10 ms sinusoidal 210 a p arm (1) 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 provided in the stmicr oelectronics application notes an1768, ?admissible avalanc he power of schottky diodes? and an2025, ?converter improvement using schottky rectifier avalanche specification?. repetitive peak avalanche power t j = 125 c, t p = 10 s 1150 w v arm (2) 2. see figure 9 maximum repetitive peak avalanche voltage t p < 10 s, t j < 125 c, i ar < 7.7 a 150 v v asm (2) maximum single-pulse peak avalanche voltage t p < 10 s, t j < 125 c, i ar < 7.7 a 150 v t stg storage temperature range -65 to +175 c t j maximum operating junction temperature (3) 3. condition to avoid thermal runaway for a diode on its own heatsink 150 c table 3. thermal resistance symbol parameter value unit r th(j-c) junction to case per diode 1.35 c/w to t a l 0 . 9 3 r th(c) coupling 0.50 dptot dtj < 1 rth(j-a)
STPS40SM120C characteristics doc id 022917 rev 1 3/9 to evaluate the conduction losses use the following equation: p = 0.52 x i f(av) + 0.0085 x i f 2 (rms) table 4. static electrical characteristics (per diode) symbol parameter test conditions min. typ. max. unit i r (1) reverse leakage current t j = 25 c v r = v rrm - 55 275 a t j = 125 c - 20 50 ma v f (2) forward voltage drop t j = 125 c i f = 5 a - 0.46 0.51 v t j = 125 c i f = 10 a - 0.55 0.60 t j = 25 c i f = 20 a -0.83 t j = 125 c - 0.63 0.69 1. pulse test: t p = 5 ms, < 2% 2. pulse test: t p = 380 s, < 2% figure 2. average forward power dissipation versus average forward current (per diode) figure 3. average forward current versus ambient temperature ( = 0.5, per diode) 0 4 8 12 16 20 0 4 8 1216202428 p (w) f(av) = 1 = 0.5 = 0.2 = 0.1 = 0.05 t = t / t p t p i (a) f(av) 0 4 8 12 16 20 24 0 25 50 75 100 125 150 i (a) f(av) r th(j-a) = r th(j-c) t (c) amb figure 4. normalized avalanche power derating versus pulse duration figure 5. relative variation of thermal impedance junction to case versus pulse duration p(t p ) p (10 s) arm arm 0.001 0.01 0.1 1 1 10 100 1000 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 z/r th(j-c) th(j-c) single pulse t (s) p
characteristics STPS40SM120C 4/9 doc id 022917 rev 1 figure 6. reverse leakage current versus reverse voltage applied (typical values, per diode) figure 7. junction capacitance versus reverse voltage applied (typical values, per diode) 1.e-03 1.e-02 1.e-01 1.e+00 1.e+01 1.e+02 0 102030405060708090100110120 t j =150c t j =125c t j =25c t j =100c t j =75c t j =50c i (ma) r v (v) r 100 1000 10000 1 10 100 1000 f=1mhz v osc =30mv rms t j =25c c(pf) v (v) r figure 8. forward voltage drop versus forward current (per diode) figure 9. reverse safe operating area (t p < 10 s and t j < 125 c) 0.1 1.0 10.0 100.0 1000.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 t j =25c (maximum values) t j =125c (maximum values) t j =125c (typical values) i (a) fm v (v) fm 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 120 130 140 150 160 170 i (a) arm v (v) arm
STPS40SM120C package information doc id 022917 rev 1 5/9 2 package information epoxy meets ul94, v0 cooling method: by conduction (c) recommended torque value: 0.4 to 0.6 nm 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 narrow leads dimensions ref. dimensions millimeters inches min. typ. max. min. typ. max. a 4.40 4.60 0.17 0.18 b 0.61 0.88 0.024 0.034 b1 0.95 1.20 0.037 0.047 c 0.48 0.70 0.019 0.027 d 15.25 15.75 0.60 0.62 d1 1.27 0.05 e 10.00 10.40 0.39 0.41 e 2.40 2.70 0.094 0.106 e1 4.95 5.15 0.19 0.20 f 1.23 1.32 0.048 0.052 h1 6.20 6.60 0.24 0.26 j1 2.40 2.72 0.095 0.107 l 13.00 14.00 0.51 0.55 l1 2.60 2.90 0.102 0.114 l20 15.40 0.61 l30 28.90 1.14 ? p 3.75 3.85 0.147 0.151 q 2.65 2.95 0.104 0.116 e p q l30 l20 l1 b1(x3) b (x3) e l e1 1 23 f d d1 h1 a j1 c
package information STPS40SM120C 6/9 doc id 022917 rev 1 devices in i 2 pak with nickel-plated back frame must not be mounted by frame soldering like smds. such devices are intended to be through-hole mounted only and in no circumstances shall st be held liable for any lack of performance or damage arising out of soldering of nickel-plated back frames. table 6. i 2 pak dimensions ref. dimensions millimeters inches min. max. min. max. a 4.40 4.60 0.173 0.181 a1 2.40 2.72 0.094 0.107 b 0.61 0.88 0.024 0.035 b1 1.14 1.70 0.044 0.067 c 0.49 0.70 0.019 0.028 c2 1.23 1.32 0.048 0.052 d 8.95 9.35 0.352 0.368 e 2.40 2.70 0.094 0.106 e1 4.95 5.15 0.195 0.203 e 10 10.40 0.394 0.409 l 13 14 0.512 0.551 l1 3.50 3.93 0.138 0.155 l2 1.27 1.40 0.050 0.055 e l2 l1 b1 d a1 c c2 a b e e1 l
STPS40SM120C package information doc id 022917 rev 1 7/9 table 7. 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. dia. 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 STPS40SM120C 8/9 doc id 022917 rev 1 3 ordering information 4 revision history table 8. ordering information order code marking package weight base qty delivery mode STPS40SM120Ctn ps40sm120ctn to-220ab narrow leads 1.9 g 50 tube STPS40SM120Ct ps40sm120ct to-220ab 1.9 g 50 tube STPS40SM120Cr ps40sm120cr i 2 pak 1.49 g 50 tube table 9. document revision history date revision changes 02-apr-2012 1 first issue.
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