this is information on a product in full production. june 2014 docid025986 rev 2 1/8 ferd20u60 field effect rectifier datasheet ? production data features ? st proprietary process ? stable leakage current over reverse voltage ? low forward voltage drop ? high frequency operation description this single rectifier is based on a proprietary technology, enabling to achieve the best in class v f /i r trade-off for a given silicon surface. packaged in powerflat? 5x6, this device is intended to be used in rectification and freewheeling operations in switch-mode power supplies. tm: powerflat is a trademark of stmicroelectronics k a a a a k k a a powerflat 5x6 ferd20u60djf table 1. device summary symbol value i f(av) 20 a v rrm 60 v t j (max) +150 c v f (typ) 350 mv www.st.com
characteristics ferd20u60 2/8 docid025986 rev 2 1 characteristics to evaluate the conduction losses use the following equation: p = 0.295 x i f(av) + 0.0105 i f 2 (rms) table 2. absolute ratings (limit ing values, at 25 c, unless otherwise specified anode terminals short-circuited) symbol parameter value unit v rrm repetitive peak reverse voltage 60 v i f(rms) forward rms current 45 a i f(av) average forward current, = 0.5 t c = 115 c 20 a i fsm surge non repetitive forward current t p = 10 ms sinusoidal 180 a t stg storage temperature range -65 to + 175 c t j (1) maximum operating junction temperature 150 c 1. condition to avoid thermal runaway for a diode on its own heatsink dptot dtj < 1 rth(j-a) table 3. thermal resistance symbol parameter value (max) unit r th(j-c) junction to case 2.6 c/w table 4. static electrical characteristics (anode terminals short-circuited) symbol parameter test conditions min. typ. max. unit i r (1) reverse leakage current t j = 25 c v r = v rrm 800 a t j = 125 c 30 70 ma v f (2) forward voltage drop t j = 25 c i f = 10 a 0.380 0.425 v t j = 125 c 0.350 0.400 t j = 25 c i f = 20 a 0.465 0.510 t j = 125 c 0.465 0.505 1. pulse test: t p = 5 ms, < 2% 2. pulse test: t p = 380 s, < 2%
docid025986 rev 2 3/8 ferd20u60 characteristics 8 figure 1. average forward power dissipation versus average forward current figure 2. average forward current versus ambient temperature ( = 0.5) p f(av) (w) 0 2 4 6 8 10 12 14 16 0 2 4 6 8 10 12 14 16 18 20 22 24 26 i (a) f(av) t =tp/t tp i f(av) (a) 0 5 10 15 20 25 30 35 0 25 50 75 100 125 150 r th(j -a) = r th(j -c) t (c) amb t =tp/t tp figure 3. relative variation of thermal impedance junction to case versus pulse duration figure 4. reverse leakage current versus reverse voltage applied (typical values) 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) single pulse z th(j-c) /r th(j-c) i r (a) m 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 50 55 60 t j = 125 c t j = 50 c t j = 75 c t j = 100 c v r (v) t j = 25 c figure 5. junction capacitance versus reverse voltage applied (typical values) figure 6. forward voltage drop versus forward current (typical values) c(pf) 100 1000 10000 1 10 100 v r (v) f = 1 mhz v osc = 30 mv rms t j = 25 c i f (a) 0.1 1.0 10.0 100.0 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 v f (v) t j = 25 c t j = 125 c t j = 75 c
characteristics ferd20u60 4/8 docid025986 rev 2 figure 7. thermal resistance junction to ambient versus copper surface under tab (typical values) 0 25 50 75 100 125 150 012345678910 r t h ( j - a ) (c/w) s cu (cm2) epoxy printed board fr4, copper thickness = 35 m
docid025986 rev 2 5/8 ferd20u60 package information 8 2 package information ? epoxy meets ul94, v0 ? cooling method: by conduction (c) 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. figure 8. powerflat-8l dimensions (definitions) table 5. powerflat-8l dimensions (values) ref. dimensions millimeters inches min. typ. max. min. typ. max. a 0.80 1.00 0.031 0.039 a1 0.02 0.05 0.001 0.002 a2 0.25 0.010 b 0.30 0.50 0.012 0.020 d 5.20 0.205 d2 4.11 4.31 0.162 0.170 e 1.27 0.050 e 6.15 0.242 e2 3.50 3.70 0.138 0.146 l 0.50 0.80 0.020 0.031 k 1.275 1.575 0.050 0.062 d2 e2 k l b e d e a a1 a2
package information ferd20u60 6/8 docid025986 rev 2 figure 9. footprint (dimensions in mm) 1.27 0.62 0.95 0.98 6.29 4.33 3.86 5.35 4.41
docid025986 rev 2 7/8 ferd20u60 ordering information 8 3 ordering information 4 revision history table 6. ordering information order code marking package weight base qty delivery mode FERD20U60DJF-TR fd20u60 powerflat 5x6 95 mg 3000 tape and reel table 7. document revision history date revision changes 25-mar-2014 1 initial release. 06-jun-2014 2 updated device name.
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