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| features small surface mounting type. ultra low v . (v =0.40v typ. at 1a) i =1.0a guaranteed despite the size. applications low-power rectification for switching power supply f f f !! ! absolute maximum ratings (ta=25 c) parameter symbol v rm limits 25 unit v peak reverse voltage v r 20 v dc reverse voltage i f 1.0 a dc forward current i fsm 3a peak forward surge current ? tj 125 ?c junction temperature tstg ?40+ 125 ?c storage temperature ? 60hz for 1 ! !! ! electrical characteristics (ta=25 c) parameter forward voltage reverse current symbol min. typ. max. unit conditions v f i r ? ? ? ? 0.45 200 v a i f =1.0a v r =20v note) esd sensitive product handling required. we declare that the material of product is halogen free (green epoxy compound). z z we declare that the material of product compliance with rohs requirements. z o w i e t e c h n o l o g y c o r p o r a t i o n schottky barrier diode lead free product halogen-free type 1 2 3 s o t - 2 3 a n o d e c a t h o d e 1 3 z o w i e t e c h n o l o g y c o r p o r a t i o n rev. 0 RB491DGH
0 0.2 0.3 0.4 0.5 0.6 0.1 0.1m 1m 100m 10m 10 1 forward current : i f ( a) forward voltage : v f ( v) c ? 5 2 1 = a t c ? 5 7 c ? 5 2 c ? 5 2 ? fig.1 forward characteristics fig.2 reversecharacteristics 0 203040506070 10 0.1 10 1 100 10 1 1000 100 reverse current : i r ( ma) reverse voltage : v r ( v) ta=125 ?c 75?c 25?c ?25?c fig.3 capacitance between terminals characteristics 010152025303540 5 1 10 1000 100 10000 terminal capacitance : c t (pf ) reverse voltage : v r ( v) f=1mhz ! !! ! electrical characteristic curves (ta=25 c) 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.2 0.1 0.3 0.4 0.5 0.7 0.6 forward power dissipation : p f ( w) average rectified forward current : i o ( a) d=0.05 d=0.1 d=0.2 d=0.3 d=0.8 dc sine d=0.5 tp t d=tp/t tj=tj max. i f i o fig.4 forward power dissipation characteristics zowie technology corporation rev. 0 zowie technology corporation RB491DGH 1.5 1.0 0.5 0 0 25 50 75 100 125 average rectified forward current : i o ( a) ambient temperature : ta ( ?c) d = 0.3 d = 0.2 d=0.1 d=0.05 dc d = 0.5 d=0.8 sine tp t d = tp/t v r = v rm /2 i f i o fig.5 derating curve (i o - ta) |
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