may 2009 doc id 15670 rev 1 1/8 8 STPS20L120C power schottky rectifier features high junction temperature capability avalanche capability specified low forward voltage drop current high frequency operation insulated package ? to-220fpab insulating voltage = 1500 v rms typical package capacitance 12 pf description dual center tap schottky rectifier suited for high frequency switch mode power supplies. packaged in to-220ab and to-220fpab, this device provides the adaptor designers with an optimized price-performance ratio. table 1. device summary i f(av) 2 x 10 a v rrm 120 v t j(max) 150 c v f(typ) 0.55 v k a2 a1 to-220ab STPS20L120Ct k k a2 a1 k a1 a2 to-220fpab STPS20L120Cfp www.st.com
characteristics STPS20L120C 2/8 doc id 15670 rev 1 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 maximum conduction losses use the following equation : p = 0.595 x i f(av) + 0.0095 i f 2 (rms) table 2. absolute ratings (limiting values, per diode) symbol parameter value unit v rrm repetitive peak reverse voltage 120 v i f(rms) forward rms current 20 a i f(av) average forward current, = 0.5 total package 20 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 8000 w t stg storage temperature range -65 to + 175 c t j maximum operating junction temperature (1) 1. condition to avoid thermal runaway for a diode on its own heatsink 150 c table 3. thermal parameters symbol parameter value unit r th(j-c) junction to case to-220ab per diode to t a l 2 1.1 c/w to-220fpab per diode to t a l 4.9 4.1 r th(c) coupling to-220ab to t a l 0.2 to-220fpab 3.2 table 4. static electrical characteristics (per diode) symbol test conditions min. typ. max. unit i r (1) 1. pulse test : tp = 5 ms, < 2% reverse leakage current t j = 25 c v r = v rrm - - 120 a t j = 125 c - 8 25 ma v f (2) 2. pulse test : tp = 380 s, < 2% forward voltage drop t j = 25 c i f = 5 a - - 0.74 v t j = 125 c - 0.55 0.605 t j = 25 c i f = 10 a - - 0.86 t j = 125 c - 0.63 0.69 t j = 25 c i f = 20 a --1 t j = 125 c - 0.72 0.785 dptot dtj --------------- 1 rth j a ? () ------------------------- - <
STPS20L120C characteristics doc id 15670 rev 1 3/8 figure 1. average forward power dissipation vs. average forward current (per diode) figure 2. average forward current vs. ambient temperature ( = 0.5, per diode) 0 1 2 3 4 5 6 7 8 9 0123456789101112 =0.05 =0.1 =0.2 =0.5 =1 t =tp/t tp p (w) f(av) i (a) f(av) 0 2 4 6 8 10 12 0 25 50 75 100 125 150 r th(j-a) =r th(j-c) r th(j-a) =15c/w t =tp/t tp to-220ab to-220fp i (a) f(av) t (c) amb figure 3. normalized avalanche power derating vs. pulse duration figure 4. normalized avalanche power derating vs. 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 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 vs. overload duration (max. values, per diode) (to-220ab) figure 6. non repetitive surge peak forward current vs. overload duration (max. values, per diode) (to-220fpab) 0 20 40 60 80 100 120 140 160 180 1.e-03 1.e-02 1.e-01 1.e+00 t c =25c t c =75c t c =125c i m t =0.5 i (a) m t(s) i (a) m 0 20 40 60 80 100 120 1.e-03 1.e-02 1.e-01 1.e+00 t c =25c t c =75c t c =125c i m t =0.5 t(s)
characteristics STPS20L120C 4/8 doc id 15670 rev 1 figure 11. forward voltage drop vs. forward current (per diode) figure 7. relative variation of thermal impedance junction to case vs. pulse duration (to-220ab) figure 8. relative variation of thermal impedance junction to case vs. 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 single pulse z/r th(j-c) th(j-c) 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-03 1.e-02 1.e-01 1.e+00 1.e+01 single pulse z/r th(j-c) th(j-c) t (s) p figure 9. reverse leakage current vs. reverse voltage applied (typical values, per diode) figure 10. junction capacitance vs. 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 10 100 1000 1 10 100 1000 f=1mhz v osc =30mv rms t j =25c v (v) r c(pf) 0 20 40 60 80 100 120 140 160 180 200 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 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 v (v) fm
STPS20L120C package information doc id 15670 rev 1 5/8 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 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
package information STPS20L120C 6/8 doc id 15670 rev 1 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 1.50 0.045 0.059 f2 1.15 1.50 0.045 0.059 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
STPS20L120C ordering information doc id 15670 rev 1 7/8 3 ordering information 4 revision history table 7. ordering information order code marking package weight base qty delivery mode STPS20L120Ct STPS20L120Ct to-220ab 2.2 g 50 tube STPS20L120Cfp STPS20L120Cfp to-220fpab 2.0 g 50 tube table 8. document revision history date revision changes 20-may-2009 1 first issue
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