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april 2010 doc id 17348 rev 1 1/13 13 STEVAL-TDR010V1 rf power amplifier demonstr ation board using: 2 x sd2942 n-channel enhancement -mode lateral mosfets features excellent thermal stability frequency: 87.5 - 108 mhz supply voltage: 48 v output power: 700 w min. gain: 19.5 db min. efficiency: 73 % min. harmonics < - 36 dbc gain flatness: 0.5 db max description the STEVAL-TDR010V1 is a rf broadband power amplifier intended for fm broadcast radio transmitters over the band 87.5 to 108 mhz using 2 x sd2942 gold metallized n-channel mos field- effect transistors. STEVAL-TDR010V1 is designed in cooperation with innovaction s.r.l in italy. table 1. device summary order code STEVAL-TDR010V1 am01227v1 www.st.com
contents STEVAL-TDR010V1 2/13 doc id 17348 rev 1 contents 1 electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 circuit layout and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 features include . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 sd2942 mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.1 mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.2 mounting sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 package mechanical data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
STEVAL-TDR010V1 electrical data doc id 17348 rev 1 3/13 1 electrical data 1.1 maximum ratings 2 electrical characteristics t a = +25 o c, v dd = 48 v, i dq = 2 x 200 ma table 2. absolute maximum ratings symbol parameter value unit p in input power 15 w p out output power 800 w t stg storage temperature range -20 to +70 c t c operating base plate temperature 0 to +70 c i dd drain current 22 a p diss power dissipation 400 w table 3. electrical specification symbol test conditions min typ max unit frequency frequency range 87.5 108 mhz p out 700 750 w gain p out = 700 w 20 1.0 db nd p out = 700 w 80 % h2 2 nd harmonic @ p out = 700 w -40 dbc h3 3 rd harmonic @ p out = 700 w -45 dbc fl gain flatness @ p out = 700 w 0.5 db
circuit schematic STEVAL-TDR010V1 4/13 doc id 17348 rev 1 3 circuit schematic figure 1. rf amplifier module 9 71& & s $7&% & s $7&% & s & s 5 n 5 n 5 . 5 . & s & s 7 5) 75$16)250(5 7 5) 75$16)250(5 5 5: 5 5: &6 3&% &6 3&% & s & s & s & s 5 : 5 : & s $7&% & s $7&% & q & q / / / q+ / q+ 5)287 5)287 7 7 '= 9 '= 9 & s & s 5 n: 5 n: 5 n 5 n & q9 & q9 5 : 5 : & s & s & q & q 5 5: 5 5: & x9 & x9 & q9 & q9 & s $7&% & s $7&% 5 : 5 : 5 n 5 n &1 9 &1 9 & s $7&% & s $7&% / 7&' / 7&' 8qedo5 8qedo5 5 n 5 n / 7&' / 7&' / q+ / q+ & s & s 5 : 5 : 5 : 5 : & s & s 5 . 5 . & s $7&% & s $7&% '= 9 '= 9 4 6' 4 6' 4 6' 4 6' & s & s & s & s 5 n 5 n ',5(&7,21$/&283/(5 5 n: 5 n: / q+ / q+ 5 5 5 5 / / & 10 $7&% & 10 $7&% 5 n 5 n & s $7&% & s $7&% 5 5: 5 5: & q9 & q9 5 5 5 5 / q+ / q+ 5 n 5 n 7 7 7 ;7& 7 ;7& & 10 $7&% & 10 $7&% *1' *1' & q9 & q9 5 5: 5 5: & s & s / q+ / q+ 7 3&% 7 3&% & s $7&% & s $7&% & s & s & s & s )& )7 9hugh )& )7 9hugh 5 5: 5 5: & s & s ' %$9 ' %$9 5 5: 5 5: & s & s &6 3&% &6 3&% 7 7 & s & s ,qklelw ,qklelw / 3&%[[[ / 3&%[[[ *1' *1' 7 7 & s $7&% & s $7&% 5 n: 5 n: / 7&' / 7&' & s & s & s & s & s & s 5 : 5 : 8qedo/ 8qedo/ 5 : 5 : & s $7&% & s $7&% / q+ / q+ 5),1 5),1 & s & s & s $7&% & s $7&% & s & s &6 3&% &6 3&% 5 n: 5 n: / q+ / q+ 5 n: 5 n: / q+ / q+ 5 : 5 : !-v
STEVAL-TDR010V1 circuit schematic doc id 17348 rev 1 5/13 figure 2. input and protection board !-v /$7&+5(6(7 2875() 9 ,15() 9 *1' 2875() 287):' 287):' *1' $&.1 *1' ,17,1+ ,1):' 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 5),1387 5() ):' 9 026)(7 *$7(6,1+ 96:5 +$5'3527 7+5(6+2/' p9:,7+287 5()/(&7('3:5 72&21752//(5 )520287387 ',5(&7,21$/&283/(5 0roh[ '0dfrp0$3fdqehuhsodfhg e\3klolsv%$33,1glrghv 1rwhv ,ixqvshflilhgdoouhvlvwruvdqgfdsdflwruvduh ,ixqvshflilhgdooqfdsdflwruvduh9<9 5)287 9 9 9 9 ,15()9#: ,1):'9#: 9#: 9#: 9#: g%$wwhqxdwru g%$wwhqxdwru & s & s 5 5 & s & s 5 5 5 5 5 5 & q & q & q & q 5 5: 5 5: 5 10 5 10 5 0 5 0 ' %$9 ' %$9 5 5: 5 5: ' %$6 ' %$6 5 5 5 5 5 . 5 . & s & s & x9 & x9 5 n 5 n 4 %& 4 %& 5 . 5 . 5 5 5 0 5 0 5 n 5 n & s & s 5 5 & s & s & s & s ,& $' ,& $' & q & q 5 . 5 . & x9 & x9 5 n 5 n & q & q 57 n 57 n & x9 & x9 & x9 & x9 / q+ / q+ 5 5 & q & q ,& /09 ,& /09 23 9 9 & s & s & x9 & x9 4 %& 4 %& 5 5 & q & q & q9<9 & q9<9 5 n 5 n 5 5 5 n 5 n 5 n 5 n & s & s / x / x & q & q & q & q ' %$9 ' %$9 5 5 & s & s *1' 9 ,& /9&* *1' 9 ,& /9&* 5 n 5 n & s & s & s & s 5 5 067 067 5 5 5 5 ,& /3,0 ,& /3,0 9lq 212)) *1' 9rxw %\sdvv & s & s 5 . 5 . & q & q ' %$6 ' %$6 & x9 & x9 & q & q &1 3lq0doh&rqqhfwru &1 3lq0doh&rqqhfwru 5< -5&)'+6 5< -5&)'+6 5 5 5 5 ,& $' ,& $' & s & s & s & s 5 n 5 n / x / x ' 0$3 ' 0$3 ' 60 ' 60 ' %$6 ' %$6 *1' 9 ,& /9&* *1' 9 ,& /9&* 5 n 5 n 4 0*6)1 /7 4 0*6)1 /7 5 n 5 n 5 5 5 n 5 n 5 5 5 n 5 n & q & q & q & q & s & s 5 n 5 n ,& $' ,& $' 5 5 5 5 &1 60%0doh &1 60%0doh & q & q 5 5: 5 5: & q & q ' %$9 ' %$9 5 n 5 n &1 3lq,'&0doh&rqqhfwru &1 3lq,'&0doh&rqqhfwru & q & q '& 3&% '& 3&% & q & q 5 . 5 . 5 5 5 5 5 n 5 n 5 n 5 n 5 . 5 . 73 73 5 n 5 n & q & q *1' 9 ,& /9&* *1' 9 ,& /9&* 5 n 5 n 5 5
circuit schematic STEVAL-TDR010V1 6/13 doc id 17348 rev 1 figure 3. output directional coupler !-v 9 9 9 9 9 9 9 9 ):' 5() 5() ):' $77 g% $77 g% 7xwwll&klsvrqrvhqrqvshflilfdwr ):' 9#: 5() 9#: 5 5 & q & q ' %$6 ' %$6 & q & q & q & q 5 5 5 n 5 n & q & q 5 5 5)287 5)287 & s & s 5 n 5 n ,& $' ,& $' 5 n 5 n 5 5 & s & s ,& $' ,& $' 5 5 5 5 5 5 5 n 5 n 5 5 5 5 & s & s . $ 5() ,& /09 627 . $ 5() ,& /09 627 5 5 &1 &1 5 n 5 n ,& $' ,& $' & s & s 5 5 5 n 5 n 5),1 5),1 ' %$6 ' %$6 & s & s '& ',5&28 3 '& ',5&28 3 & q & q 5 n 5 n 5 n 5 n ' %$6 ' %$6 5 5 & q & q 5 n 5 n 5 5 & x9 7dqwdolr & x9 7dqwdolr & q & q 5 n 5 n & q & q 5 5 & s & s 5 5 5 n 5 n 5 n 5 n 5 5 & q & q 5 n 5 n
STEVAL-TDR010V1 circuit layout and connections doc id 17348 rev 1 7/13 4 circuit layout and connections figure 4. circuit layout and connections !-v
features include STEVAL-TDR010V1 8/13 doc id 17348 rev 1 5 features include 30 w input dummy load with automatic change-over case of alarm input directional coupler output directional coupler input forward power measurement 2.5 v @ 10 w input reflected power measurement 2.5 v @ 5 w output forward power measurement 2.5 v @ 700 w output reflected power measurement 2.5 v @ 250 w latching protection latch reset pin for manual restart (momentary to gnd) over reflected power ultrafast alarm (700 ns) input pin for rf power inhibit acknowledge pin alarm + 5 v figure 5. idc connector piuout !-v
STEVAL-TDR010V1 sd2942 mounting recommendations doc id 17348 rev 1 9/13 6 sd2942 mounting recommendations 6.1 mounting recommendations ensure holes in heatsinks are free from burrs; minimum depth of tapped holes in heatsinks is 6 mm; use 4-40 unc-2a cheese-head screws with a flat washer to spread the joint pressure; the minimum flatness of the mounting area is 0.02 mm; mounting area roughness should be less than 0.5 m (micro); avoid, as much as possible, use of flux or flux solutions because flux can penetrate even when hermetically sealed ceramic-capped transistors. tin and wash the printed- circuit board before mounting the power transistors, then solder the transistor leads without using flux; transistor leads may be tinned by dipping them full-length into a solder bath at a temperature of about 230 c. no flux should be used during tinning; recommended heatsink co mpounds: wpsii (silicon free) from austerlitz electronics, 340 from dow corning etc. 6.2 mounting sequence apply a thin layer of evenly distributed heatsink compound to the flange; position the device with flat washers in place; tighten the screws until finger tight (0.05 nm); further tighten the screws until the specified torque is reached; for m174, m177 and m244 type of packages, torque should be minimum 0.6 nm and 0.75 nm max. table 4. dmos packages - list of materials package type description flange leadframe ceramic insulator plating torque (nm) leads flange min max m174 0.500 dia 4l non herm w/flange cu alloy 42 (fe58 / ni42) beo (99.5% min) au (100 min) over ni (100 min / 350 max) ni(100 min) + pd (10 min) 0.6 0.75 m174 (moly disk) 0.500 dia 4l non herm w/flange (moly disk) cu-mo- cu alloy 42 (fe58 / ni42) beo (99.5% min) au (100 min) over ni (100 min / 350 max) ni(100 min) + pd (10 min) 0.6 0.75 m177 0.550 dia 4l non herm w/flange cu-mo- cu alloy 42 (fe58 / ni42) beo (99.5% min) au (60 min) over ni (100 min / 350 max) au (100 min) over ni (100 min / 350 max) 0.6 0.75 m244 2 x 0.400x0.425 wide 2l lap n/h flange w (85%) - cu (15%) alloy 42 (fe58 / ni42) beo(99.5 % min) au (60 min) over ni (100 min / 350 max) au (60 min) over ni (100 min / 350 max) 0.6 0.75
package mechanical data: STEVAL-TDR010V1 10/13 doc id 17348 rev 1 7 package mechanical data: 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. table 5. m244 (.400 x .860 4/l bal n/herm w/flg) dim. mm. inch min. typ max. min. typ max. a 5.59 5.84 0.220 0.230 b5.08 0.200 c 3.02 3.28 0.119 0.129 d 9.65 9.91 0.380 0.390 e 19.81 20.82 0.780 0.820 f 10.92 11.18 0.430 0.440 g 27.94 1.100 h 33.91 34.16 1.335 1.345 i 0.10 0.15 0.004 0.006 j 1.52 1.78 0.060 0.070 k 2.59 2.84 0.102 0.112 l 4.83 5.84 0.190 0.230 m 10.03 10.34 0.395 0.407 n 21.59 22.10 0.850 0.870
STEVAL-TDR010V1 package mechanical data: doc id 17348 rev 1 11/13 figure 6. m244 package dimensions controlling dimension: inches
revision history STEVAL-TDR010V1 12/13 doc id 17348 rev 1 8 revision history table 6. document revision history date revision changes 02-apr-2010 1 initial release.
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