1/8 STPS20L45CF/cw/ct/cfp/cg january 2002 - ed: 2c low drop power schottky rectifier ? dual center tap schottky rectifiers designed for high frequency switched mode power supplies and dc to dc converters. these devices are intended for use in low voltage, high frequency inverters, free-wheeling and polarity protection applications. description n low forward voltage drop meaning very small conduction losses n low switching losses allowing high frequency operation n insulated package: isowatt220ab, to-220fpab insulating voltage = 2000v dc capacitance = 12pf features and benefits symbol parameter value unit v rrm repetitive peak reverse voltage 45 v i f(rms) rms forward current 30 a i f(av) average forward current to-220ab / d 2 pak to-247 tc = 135c d = 0.5 per diode per device 10 20 a isowatt220ab to-220fpab tc = 115c d = 0.5 per diode per device 10 20 a i fsm surge non repetitive forward current tp = 10 ms sinusoidal 180 a i rrm peak repetitive reverse current tp=2 m s square f=1khz 1a i rsm non repetitive peak reverse current tp = 100 m s square 2a t stg storage temperature range - 65 to + 150 c tj maximum operating junction temperature * 150 c dv/dt critical rate of rise of reverse voltage 10000 v/ m s absolute ratings (limiting values, per diode) i f(av) 2x10a v rrm 45 v tj (max) 150c v f (max) 0.5 v major products characteristics a1 k a2 a1 k a2 isowatt220ab STPS20L45CF to-247 stps20l45cw k a1 a2 to-220ab stps20l45ct *: dptot dtj rth j a < - 1 () thermal runaway condition for a diode on its own heatsink a1 k a2 a1 a2 k to-220fpab STPS20L45CFp k a1 a2 d 2 pak stps20l45cg
STPS20L45CF/cw/ct/cfp/cg 2/8 symbol parameter tests conditions min. typ. max. unit i r * reverse leakage current tj = 25c v r =v rrm 0.2 ma tj = 125c 65 130 ma v f * forward voltage drop tj = 25 ci f =10a 0.55 v tj = 125c i f =10a 0.44 0.5 tj=25 ci f =20a 0.73 tj = 125c i f =20a 0.62 0.72 pulse test : * tp = 380 m s, d <2% to evaluate the conduction losses use the following equation : p=0.28xi f(av) + 0.022 i f 2 (rms) static electrical characteristics (per diode) symbol parameter value unit r th(j-c) junction to case isowatt220ab to-220fpab per diode total coupling 4.5 3.5 2.5 c/w r th(j-c) junction to case to-247 per diode total coupling 2.2 1.20 0.3 c/w r th(j-c) junction to case to-220ab d 2 pak per diode total coupling 2.2 1.3 0.3 c/w thermal resistances 02468101214 0 1 2 3 4 5 6 7 8 if(av) (a) pf(av)(w) d = 0.2 d = 0.5 d = 1 d = 0.05 d = 0.1 t d =tp/t tp fig. 1: average forward power dissipation versus average forward current (per diode). 0 25 50 75 100 125 150 0 1 2 3 4 5 6 7 8 9 10 11 12 if(av)(a) rth(j-a)=15c/w rth(j-a)=rth(j-c) to-220ab/to-247 isowatt220ab t d =tp/t tp tamb(c) fig. 2: average forward current versus ambient temperature( d = 0.5, per diode). when the diodes 1 and 2 are used simultaneously : d tj(diode 1) = p(diode1) x r th(j-c) (per diode) + p(diode 2) x r th(c)
STPS20L45CF/cw/ct/cfp/cg 3/8 1e-3 1e-2 1e-1 1e+0 0.0 0.2 0.4 0.6 0.8 1.0 tp(s) zth(j-c)/rth(j-c) d = 0.1 d = 0.2 d = 0.5 single pulse t d =tp/t tp fig. 4-1: relative variation of thermal impedance junction to case versus pulse duration (to-220ab, to-247, d 2 pak). 0 5 10 15 20 25 30 35 40 45 1e-3 1e-2 1e-1 1e+0 1e+1 1e+2 2e+2 vr(v) ir(ma) tj=75c tj=25c tj=125c tj=150c fig. 5: reverse leakage current versus reverse voltage applied (typical values, per diode). 12 51020 50 100 1000 2000 vr(v) c(pf) f=1mhz tj=25c fig. 6: junction capacitance versus reverse voltage applied (typical values, per diode). 1e-3 1e-2 1e-1 1e+0 1e+1 0.0 0.2 0.4 0.6 0.8 1.0 tp(s) zth(j-c)/rth(j-c) t d =tp/t tp d = 0.1 d = 0.2 d = 0.5 single pulse fig. 4-2: relative variation of thermal impedance junction to case versus pulse duration (isowatt220ab, to-220fpab). 1e-3 1e-2 1e-1 1e+0 0 10 20 30 40 50 60 70 80 90 100 im(a) tc=25c tc=100c tc=50c i m t d =0.5 t(s) fig. 3-2: non repetitive surge peak forward current versus overload duration (maximum values, per diode, isowatt220ab, to-220fpab). 1e-3 1e-2 1e-1 1e+0 0 20 40 60 80 100 120 140 im(a) tc=25c tc=125c tc=75c t(s) i m t d =0.5 fig. 3-1: non repetitive surge peak forward current versus overload duration (maximum values, per diode, to-220ab, to-247, d 2 pak).
STPS20L45CF/cw/ct/cfp/cg 4/8 n cooling method : c n recommended torque value : 0.55 m.n n maximum torque value : 0.70 m.n package mechanical data isowatt220ab ref. dimensions millimeters inches min. max. min. max. a 4.40 4.60 0.173 0.181 b 2.50 2.70 0.098 0.106 d 2.50 2.75 0.098 0.108 e 0.40 0.70 0.016 0.028 f 0.75 1.00 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 2.40 2.70 0.094 0.106 h 10.00 10.40 0.394 0.409 l2 16.00 typ. 0.630 typ. l3 28.60 30.60 1.125 1.205 l4 9.80 10.60 0.386 0.417 l6 15.90 16.40 0.626 0.646 l7 9.00 9.30 0.354 0.366 diam 3.00 3.20 0.118 0.126 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.1 1.0 10.0 100.0 ifm(a) tj=75c tj=25c tj=125c typical values tj=150c vfm(v) fig. 7: forward voltage drop versus forward current (maximum values) (per diode). 0 4 8 12 16 20 24 28 32 36 40 0 10 20 30 40 50 60 70 80 s(cu) (cm2) rth(j-a) (c/w) fig. 8: thermal resistance junction to ambient ver- sus copper surface under tab (epoxy printed circuit board fr4, copper thickness: 35m) (d 2 pak).
STPS20L45CF/cw/ct/cfp/cg 5/8 package mechanical data to-220fpab h l3 l2 l4 l6 g g1 f f1 l5 d e l7 a b dia f2 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 n cooling method : c n recommended torque value : 0.55 m.n n maximum torque value : 0.70 m.n
6/8 STPS20L45CF/cw/ct/cfp/cg n cooling method : c n recommended torque value : 0.55 m.n n maximum torque value : 0.70 m.n package mechanical data to-220ab a c d l7 dia l5 l6 l9 l4 f h2 g g1 l2 f2 f1 e m 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
STPS20L45CF/cw/ct/cfp/cg 7/8 package mechanical data d 2 pak a c2 d r a2 m v2 c a1 g l l3 l2 b b2 e * * flat zone no less than 2mm 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 8.90 3.70 1.30 5.08 16.90 10.30 footprint
8/8 STPS20L45CF/cw/ct/cfp/cg information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap- proval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - printed in italy - all rights reserved. stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany hong kong - india - israel - italy - japan - malaysia - malta - morocco - singapore spain - sweden - switzerland - united kingdom - united states. http://www.st.com n cooling method : c n recommended torque value : 0.8m.n n maximum torque value : 1.0m.n package mechanical data to-247 f2 f1 v2 l4 l2 l1 l3 d l l5 me h v v a dia. f3 f4 g = = f(x3) ref. dimensions millimeters inches min. typ. max. min. typ. max. a 4.85 5.15 0.191 0.203 d 2.20 2.60 0.086 0.102 e 0.40 0.80 0.015 0.031 f 1.00 1.40 0.039 0.055 f1 3.00 0.118 f2 2.00 0.078 f3 2.00 2.40 0.078 0.094 f4 3.00 3.40 0.118 0.133 g 10.90 0.429 h 15.45 15.75 0.608 0.620 l 19.85 20.15 0.781 0.793 l1 3.70 4.30 0.145 0.169 l2 18.50 0.728 l3 14.20 14.80 0.559 0.582 l4 34.60 1.362 l5 5.50 0.216 m 2.00 3.00 0.078 0.118 v5 5 v2 60 60 dia. 3.55 3.65 0.139 0.143 ordering type marking package weight base qty delivery mode STPS20L45CF STPS20L45CF isowatt220ab 2.1g 50 tube STPS20L45CFp STPS20L45CFp to-220fpab 2g 50 tube stps20l45ct stps20l45ct to-220ab 2g 50 tube stps20l45cw stps20l45cw to-247 4.4g 30 tube stps20l45cg stps20l45cg d 2 pak 1.48g 50 tube stps20l45cg-tr stps20l45cg d 2 pak 1.48g 1000 tape & reel n epoxy meets ul94,v0
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