philips semiconductors product specification rectifier diodes pbyr245ct series schottky barrier features symbol quick reference data ? low forward volt drop ? fast switching v r = 40 v/ 45 v ? reverse surge capability ? high thermal cycling performance i o(av) = 2 a ? low profile surface mounting package v f 0.45v general description pinning sot223 dual, common cathode schottky pin description rectifier diodes in a plastic envelope. intended for use as 1 anode 1 output rectifiers in low voltage, high frequency switched mode power 2 cathode supplies. 3 anode 2 the pbyr245ct series is supplied in the surface mounting sot223 tab cathode package. limiting values limiting values in accordance with the absolute maximum system (iec 134) symbol parameter conditions min. max. unit pbyr2 40ct 45ct v rrm peak repetitive reverse - 40 45 v voltage v rwm working peak reverse - 40 45 v voltage v r continuous reverse voltage t sp 74 ?c - 40 45 v i o(av) average rectified output square wave; d = 0.5; t sp 119 ?c - 2 a current (both diodes conducting) i frm repetitive peak forward square wave; d = 0.5; t sp 119 ?c - 2 a current per diode i fsm non-repetitive peak forward t = 10 ms - 6 a current per diode t = 8.3 ms - 6.6 a sinusoidal; t j = 125 ?c prior to surge; with reapplied v rrm(max) i rrm peak repetitive reverse pulse width and repetition rate - 1 a surge current per diode limited by t j max t j operating junction - 150 ?c temperature t stg storage temperature - 40 150 ?c thermal resistances symbol parameter conditions min. typ. max. unit r th j-a thermal resistance junction pcb mounted, minimum footprint - 156 - k/w to ambient pcb mounted, pad area as in fig:1 - 70 - k/w k a1 a2 13 2 4 1 23 july 1998 1 rev 1.400
philips semiconductors product specification rectifier diodes pbyr245ct series schottky barrier electrical characteristics t j = 25 ?c unless otherwise specified symbol parameter conditions min. typ. max. unit v f forward voltage i f = 1 a; t j = 125?c - 0.41 0.45 v i f = 2 a - 0.58 0.7 v i r reverse current v r = v rwm - 0.03 0.2 ma v r = v rwm ; t j = 100?c - 1.5 10 ma c d junction capacitance v r = 5 v; f = 1 mhz, t j = 25?c to 125?c - 60 - pf printed circuit board dimensions in mm. fig.1. pcb for thermal resistance and power rating for sot223. pcb: fr4 epoxy glass (1.6 mm thick), copper laminate (35 m m thick). 36 60 9 10 4.6 18 4.5 7 15 50 july 1998 2 rev 1.400
philips semiconductors product specification rectifier diodes pbyr245ct series schottky barrier fig.2. maximum forward dissipation p f = f(i f(av) ) per diode; square current waveform where i f(av) =i f(rms) x ? d. fig.3. maximum forward dissipation p f = f(i f(av) ) per diode; sinusoidal current waveform where a = form factor = i f(rms) / i f(av) . fig.4. typical and maximum forward characteristic i f = f(v f ); parameter t j fig.5. typical reverse leakage current per diode; i r = f(v r ); parameter t j fig.6. typical junction capacitance per diode; c d = f(v r ); f = 1 mhz; t j = 25?c to 125 ?c. fig.7. transient thermal impedance; per diode; z th j-sp = f(t p ). 0 0.5 1 1.5 0 0.2 0.4 0.6 0.8 1 d = 1.0 0.5 0.2 0.1 pbyr245ct rs = 0.183 ohms vo = 0.27 v average forward current, if(av) (a) forward dissipation, pf (w) d = t p t p t t t i 0 25 50 10 1 0.1 0.01 0.001 reverse current, ir (ma) reverse voltage, vr (v) 50 c 75 c 100 c 125 c pbyr245ct tj = 25 c 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1 a = 1.57 1.9 2.2 2.8 4 pbyr245ct rs = 0.183 ohms vo = 0.27 v average forward current, if(av) (a) forward dissipation, pf (w) 1 10 100 10 1000 100 cd / pf vr / v pbyr245ct 0 0.2 0.4 0.6 0.8 1 1.2 1.4 0 0.5 1 1.5 2 2.5 3 pbyr245ct forward voltage, vf (v) forward current, if (a) tj = 25 c tj = 125 c max typ 1us 10us 100us 1ms 10ms 100ms 1s 10s 0.01 0.1 1 10 100 pbyr245ct pulse width, tp (s) transient thermal impedance, zth j-sp (k/w) d = t p t p t t p t d july 1998 3 rev 1.400
philips semiconductors product specification rectifier diodes pbyr245ct series schottky barrier mechanical data dimensions in mm net mass: 0.11 g fig.8. sot223 surface mounting package. notes 1. for further information, refer to philips publication sc18 " smd footprint design and soldering guidelines". order code: 9397 750 00505. 2. epoxy meets ul94 v0 at 1/8". 6.7 6.3 3.1 2.9 4 1 23 2.3 1.05 0.85 0.80 0.60 4.6 3.7 3.3 7.3 6.7 b a 0.10 0.02 13 16 max 1.8 max 10 max 0.32 0.24 (4x) b m 0.1 a m 0.2 july 1998 4 rev 1.400
philips semiconductors product specification rectifier diodes pbyr245ct series schottky barrier definitions data sheet status objective specification this data sheet contains target or goal specifications for product development. preliminary specification this data sheet contains preliminary data; supplementary data may be published later. product specification this data sheet contains final product specifications. limiting values limiting values are given in accordance with the absolute maximum rating system (iec 134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of this specification is not implied. exposure to limiting values for extended periods may affect device reliability. application information where application information is given, it is advisory and does not form part of the specification. philips electronics n.v. 1998 all rights are reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, it is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. life support applications these products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips for any damages resulting from such improper use or sale. july 1998 5 rev 1.400
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