rf & microwave transistors hf ssb applications .500 4lfl (m174) epoxy sealed . optimized for ssb . 30 mhz . 50 volts . efficiency 40% . common emitter . gold metallization . p out = 220 w pep with 13 db gain description the sd1731 is a 50 v epitaxial silicon npn planar transistor designed primarily for ssb communica- tions. this device utilizes emitter ballasting for im- proved ruggedness and reliability. pin connection branding TH562 order code sd1731 absolute maximum ratings (t case = 25 c) symbol parameter value unit v cbo collector-base voltage 110 v v ceo collector-emitter voltage 55 v v ebo emitter-base voltage 4.0 v i c device current 20 a p diss power dissipation (t heatsink 25 c) 233 w t j junction temperature +200 c t stg storage temperature - 65 to +150 c r th(j-c) junction-case thermal resistance 0.55 c/w r th(c-s) case-heatsink thermal resistance 0.2 c/w sd1731 (TH562) 1. collector 3. base 2. emitter 4. emitter thermal data july 10, 1995 1/7
electrical specifications symbol test conditions value unit min. typ. max. p out f = 30 mhz v ce = 50 v i cq = 150 ma 220 e e w g p * p out = 220 w pep v ce = 50 v i cq = 150 ma 13 e e db imd* p out = 220 w pep v ce = 50 v i cq = 150 ma ee - 30 dbc h c* p out = 220 w pep v ce = 50 v i cq = 150 ma 40 e e % c ob f = 1 mhz v cb = 50 v e 330 e pf static (t case = 25 c) symbol test conditions value unit min. typ. max. bv cbo i c = 200 ma i e = 0ma 110 e e v bv ceo i c = 200 ma i b = 0ma 55 e e v bv ebo i e = 20 ma i c = 0ma 4.0 e e v i ceo v ce = 30 v i e = 0ma ee 5 ma i ces v ce = 55 v i e = 0ma e e 10 ma h fe v ce = 6v i c = 10 a 15 e 80 e dynamic (t heatsink = 25 c) sd1731 (TH562) july 10, 1995 2/7
typical performance power output pep vs power input collector efficiency vs power output pep intermodulation distortion vs power output pep sd1731 (TH562) july 10, 1995 3/7
typical performance power gain vs power output pep collector base capacitance vs collector emitter voltage sd1731 (TH562) july 10, 1995 4/7
test circuit c1 : arco 426 + 220pf + 330pf chips c2 : 2 x 10nf chips c3 : arco 4615 + 2.2nf + 2 x 1nf lcc + 4.7nf + 560pf chps c4 : arco 4213 + 330pf chip c5 : 10nf chip c6 : 3 x 10nf chips c7, c8, c9, c10, c11 : 1nf + 10nf + 100nf + 4.7 m f, 63v + 100 m f, 63v l1 : 3 turns of 1.2mm unenameled wire diameter, 7.1mm, length 13mm l2, l3 : 8 turns of 0.55mm enameled wire on ferrite core phillips 4c6 97170 (9 x 6 x 3) l4 : 10 turns of 1.2mm enameled wire, diameter 8.1mm, length 20mm l5 : 7 turns of 1.2mm enameled wire on ferrite core phillips 4c6 97180 t1 : 6:3.5 impedance transformer on toriod phillips 4c6 97180 t2 : twisted pair 4:1 transformer, 4 turns made with 1.0mm enameled on toriod phillips 4c6 97180 t3 : feedback transformer primary: 2 turns of 1mm enameled wire secondary: 8 turns of 1mm enameled wire t4 : twisted pair 4:1 transformer, 4 turns of bifilar twisted 1.2mm wires on ferrite core phillips 4c6 97200 sd1731 (TH562) july 10, 1995 5/7
mounting circuit bias circuit sd1731 (TH562) july 10, 1995 6/7
package mechanical data ref.: dwg. no.12-0174 rev. a information furnished is believed to be accurate and reliable. however, sgs-thomson microelectronics 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 sgs-thomson microelectron- ics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. sgs-thomson microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of sgs-thomson microelectronics. ? 1995 sgs-thomson microelectronics - all rights reserved sgs-thomson microelectronics group of companies australia - brazil - france - germany - hong kong - italy - japan - korea - malaysia - malta - morocco - the netherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. sd1731 (TH562) july 10, 1995 7/7
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