1 description the fmtr series of dc/dc converters offers up to 30 watts of output power from single or dual output configurations. they operate over the full military temperature range with up to 83% effi- ciency. fmtr converters are packaged in hermetically sealed metal cases, making them ideal for use in military, aerospace and other high reliability applications. c onverter d esign the fmtr converters are constant frequency, pulse-width mod- ulated switching regulators which use a quasi-square wave, single ended, forward converter design. tight load regulation is maintained via wide bandwidth magnetic feedback and, on single output models, through use of remote sense. indefinite short circuit protection and overload protection are provided by a constant current-limit feature. this protective system senses current in the converter s secondary stage and limits it to approximately 115% of the maximum rated output current. b uilt - in f ilters the built-in input and output filters reduce layout issues and conserve board space. the 2.7 amp emi input filter meets mil-std- 461c, ce03 and allows filtering of additional converters through the filter output pins. the output filter reduces high frequency common and differential mode noise. it allows a higher bandwidth ripple voltage measurement and eliminates the need for external output decoupling capacitors. both input and output filters reduce radiated emissions providing quieter operation than conventional dc/dc converters. w arning :r equired d amping n etwork to prevent damage to the internal circuitry an external capacitor and resistor are required across the filter outputs (pins 3 and 4) as shown in figure 1. this applies to both single and dual output models. the recommended capacitor type is wet tantalum, mil-c- 39006. emi f iltered dc/dc c onverters 28 v olt i nput fmtr series 30 watt f eatures emi input filter, up to 50 db attenuation ?5 to +125? operation high frequency output filter 17 to 40 vdc input fully isolated, magnetic feedback 600 khz typical?ingle ended forward inhibit and synchronization functions indefinite short circuit protection trim and remote sense on singles up to 83% efficiency up to 50v for 50 ms transient protection models vdc o utput single 3.3 5 12 15 dual ? ? 2 ? 5 size (max): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm) weight: 100 grams maximum screening: standard or es, see the environmental screening table 11 positive output 10 output common 28 vin 8 input common 7 inhibit/sync 2 return inhibit 5 sync 1 emi input filter 2.7 a max. vin vout + + + + dc/dc converter high frequency output filter 4 filter output 3 filter output rtn additional dc/dc converters 2.2 ? 220 f required damping network sync inhibit ~ +vin rtn inh sync rtn f igure 1: fmtr t ypical i nput i nterface a pplies to s ingles and d uals (s hown with s ingle o utput )
single output models fmtr283r3s fmtr2805s fmtr2812s fmtr2815s parameter condition min typ max min typ max min typ max min typ max units output voltage 25 c 3.26 3.30 3.34 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 vdc 55 c to +125 c 3.20 3.30 3.40 4.85 5.00 5.15 11.64 12.00 12.36 14.55 15.00 15.45 output current 1 v in = 17 to 40 vdc 0 6.06 0 5.0 0 2.5 0 2.0 a output power 1 v in = 17 to 40 vdc 0 20 0 25 0 30 0 30 w output ripple 10 khz 2 mhz 25 c 70 140 110 220 60 120 25 50 mv p-p voltage 180 260 160 90 line regulation 2 v in = 17 to 40 vdc 10 15 50 15 50 15 50 mv load regulation no load to full 10 15 50 15 50 15 50 mv input voltage 1 no load to full 17 28 40 17 28 40 17 28 40 17 28 40 vdc input current 1 no load 30 75 35 75 35 75 35 75 ma inhibited 78 38 38 38 ma input ripple current 10 khz 10 mhz 510 510 510 510map-p efficiency includes filter 25 c73 75 75 77 79 82 80 83 % 70 72 72 74 76 78 77 79 load fault 3 power dissipation short circuit 25 c 10 10 10 10 w 55 c to +125 c 12 12 12 12 recovery 4, 6 1.4 6 1.4 5 1.4 5 1.4 5 ms step load resp. 50% 100% 50% transient 125 250 200 300 250 400 350 500 mv pk recovery 4, 6 200 60 200 60 200 60 200 s step line resp. 6 17 40 17 vdc transient 5 300 200 300 400 500 500 600 mv pk recovery 4 300 300 300 300 s start-up 1 delay 1.4 5 1.4 5 1.4 5 1.4 5 ms overshoot 6 full load 050 050 0 120 0 150 mv pk no load 33 150 50 250 120 600 150 750 typical characteristics sync and inhibit recommended operating conditions absolute maximum ratings input voltage 17 to 40 vdc output power 25 to 30 watts depending on model input filter current, 2.7 a max. lead soldering temperature (10 sec per pin) 300 c storage temperature range (case) 65 c to +135 c 2 fmtr series 30 watt dc/dc c onverters output voltage temperature coefficient 100 ppm/ c typical input to output capacitance 50 pf typ current limit 115% of full load typical isolation 100 megohm minimum at 500 v audio rejection 40 db typical conversion frequency free run 550 min, 600 typ, 650 max khz external sync 500 to 675 khz inhibit pin voltage (unit enabled) 9 to 11 v input filter dc resistance 0.2 ohms max input voltage range 17 to 40 vdc continuous 50v for 50 ms transient protection case operating temperature (tc) 55 c to +125 c full power 55 c to +135 c absolute derating output power/current linearly from 100% at 125 c to 0% at 135 c electrical characteristics: -55? to +125 tc, 28 vdc vin, 100% load, free run, unless otherwise specified. sync (500 to 675 khz) duty cycle 40% min, 60% max logic low 0.8 v max logic high 4.5 v min, 5 v max referenced to inh/sync return if not used, connect to inh/sync return inhibit ttl open collector logic low (output disabled) voltage 0.8 v inhibit pin current 8.0 ma max referenced to inh/sync return logic high (output enabled) open collector notes 1. tc = 55 c to +125 c 2. operation is limited below 17v (see figure 19). 3. indefinite short circuit protection not guaranteed above 125 c case. 4. recovery time is measured from application of the transient to point at which vout is within 1% of final value. 5. transition time 10 s. 6. parameter shall be tested as part of device characterization and after design and process changes. thereafter, parameters shall be guaranteed to the limits specified in the electrical characteristics table. emi filter noise rejection - minimum 500 khz 55 db 1 mhz 60 db 5 mhz 60 db
dual output models fmtr2805d fmtr2812d fmtr2815d parameter conditions min typ max min typ max min typ max units output voltage 25 c+v out 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 v out 4.90 5.00 5.08 11.80 12.00 12.18 14.76 15.00 15.23 vdc 55 c to +125 c+v out 4.85 5.00 5.15 11.64 12.00 12.36 14.55 15.00 15.45 v out 4.80 5.00 5.18 11.56 12.00 12.42 14.46 15.00 15.53 output current 1, 2 v in = 17 to 40 vdc 0 2.5 4.5 0 1.25 2.25 0 1.0 1.8 a output power 1, 2 v in = 17 to 40 vdc 0 25 0 30 0 30 w output ripple 10 khz - 2 mhz 25 c 75 140 25 80 40 80 mv p-p voltage +/ v out 180 120 120 line regulation +v out 10 50 10 50 10 50 mv v in = 17 to 40vdc v out 50 100 50 150 50 180 load regulation +v out 550 15 50 15 50 mv no load to full v out 45 120 45 170 40 190 cross regulation 25 c see notes 4 & 9 8 5 3 % effect on v out 25 c see notes 5 & 9 5 4 4 input voltage 1 continuous 17 28 40 17 28 40 17 28 40 vdc no load to full transient 50 ms 0 50 0 50 0 50 v input current no load 35 75 50 75 50 75 ma inhibited 38 38 38ma input ripple current 1 10 khz - 10 mhz 510 510 510map-p efficiency 25 c7577 78 80 79 82 % 72 74 75 77 76 78 load fault 6 power dissipation short circuit 25 c 10 10 10 w 12 12 12 recovery 9 1.4 5.0 1.4 5.0 1.4 5.0 ms step load 50 100 50% balanced response v out transient 200 300 150 300 200 400 mv pk recovery 7, 9 100 200 100 200 100 200 s step line 9 17 40 17 v in response v out transient 8 200 400 200 400 400 500 mv pk recovery 7 300 300 300 s start up 1 delay 1.4 5 1.4 5 1.4 5 ms overshoot 9 full load 050 0 120 0 150 mv pk no load 50 250 120 600 150 750 3 fmtr series 30 watt dc/dc c onverters electrical characteristics: -55? to +125? tc, 28 vdc vin, 100% load, free run, unless otherwise specified. notes 1. tc = 55 c to +125 c. 2. up to 90% of the total output current/power is available from either output providing the positive output is carrying at least 10% of the total output power. 3. operation is limited below 17 v (see figure 19). 4. effect on the negative output under the following conditions: +p out 20% to 80%; p out 80% to 20% 5. effect on the negative output under the following conditions: +p out 50%; p out 10% to 50% 6. indefinite short circuit protection not guaranteed above 125 c case. 7. recovery time is measured from application of the transient to point at which vout is within 1% of final value. 8. transition time 10 s. 9. parameter shall be tested as part of device characterization and after design and process changes. thereafter, parameters shall be guaranteed to the limits specified in the electrical characteristics table.
trim and remote sense (available on single output models only) trim formulas vout = desired output voltage; rt = trim resistor 3.3v: rt = 1300 * vout 4304 1.2475 5v: rt = 1300 * vout 6512 1.2475 12v: rt = 1300 * vout 15631 1.2475 15v: rt = 1300 * vout 19498 1.2475 4 fmtr series 30 watt dc/dc c onverters pin out r l output common remote sense connection 2 make connections at load. fmtr single output converter 10 9 11 7 8 +v in input common 12 sense return sense positive output 2 2 external trim connection 1 make connections at converter. r l output common fmtr single output converter 10 9 11 7 8 +v in input common 12 sense return sense positive output 1 r t 1 f igure 3: r emote s ense 2, 3 f igure 2: t rim c onnection 1, 2, 3 notes for remote sense and trim 1. when trimming output voltage and/or remote sensing, the total output voltage increase must be less than 0.6 volts at the converters pins to maintain specified performance. 2. if neither voltage trim nor remote sense will be used, connect pin 9 to pin 10 and pin 11 to pin 12 or the output voltage will increase by 1.2 volts 3. caution: the converter will be permanently damaged if the posi- tive remote sense (pin 12) is shorted to ground. damage may also result if the output common or positive output is disconnected from the load with the remote sense leads connected to the load. pin single output dual output 1 sync sync 2 inhibit/sync rtn inhibit/sync rtn 3 filter out rtn filter out rtn 4 filter out filter out 5 inhibit inhibit 6 no connection no connection 7 input common input common 8 28 v input 28v input 9 sense rtn no connection 10 output common negative output 11 positive output output common 12 positive sense positive output f igure 4: p in o ut see page 7 for dimensions. angled corner indicates pin one. 1 2 3 4 5 6 12 11 10 9 8 7 top view fmtr (pin side, marked side)
5 fmtr series 30 watt dc/dc c onverters typical performance curves: 25? tc, 28 vdc vin, 100% load, free run, unless otherwise specified. f igure 8 f igure 10 output power (watts) fmtr2812d efficiency e f f ic ie n c y ( %) 60 85 80 75 70 65 51015 20 16v 40v 28v 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency (khz) audio rejection, fmtr series attenuation (db) output power (watts) fmtr2805s efficiency e f f ic ie n c y ( %) 60 85 80 75 70 65 5101520 25 16v 40v 28v f igure 5 output power (watts) fmtr2812s efficiency e f f ic ie n c y ( %) 60 85 80 75 70 65 5 16v 28v 40v 10 15 20 f igure 6 output power (watts) fmtr2815d efficiency e f f ic ie n c y ( %) 65 90 85 80 75 70 51015 20 40v 28v 16v f igure 9 f igure 7 output power (watts) fmtr2815s efficiency e f f ic ie n c y ( %) 62 87 82 77 72 67 5 16v 28v 40v 10 15 20 25 model numbering key fmtr 28 12 d / es base model input voltage output voltage number of outputs (s = single, d = dual) screening (standard screening has no designator in this position.)
6 fmtr series 30 watt dc/dc c onverters typical performance curves: 25? tc, 28 vdc vin, 100% load, free run, unless otherwise specified. output load (%) cond. b: 50% load +v, 50% to 10% v cond. a: 50% load v, 50% to 10% +v cross regulation v o u t v o l t a g e c ha n g e (% ) 8 0 8 10 20 30 40 50 7 6 5 4 3 2 1 1 2 3 4 5 6 7 cond a cond b 2812d 2812d 2815d 2805d 2805d f igure 17 200 s/div fmtr2815d turn-on into no load 5v/div 20v/div v in +v out v out f igure 18 output power (watts) 1% drop fmtr singles and duals low line dropout in p u t vo l t a g e ( v o l ts ) 13.0 13.5 14.0 14.5 15.0 15.5 16.0 91215182124 27 30 f igure 19 3 27 6 24 9 21 12 18 15 15 18 12 21 9 24 6 27 3 30 0 +p out p out 0 30 output load (watts) 10% to 90% load +v 90% to 10% load v cross regulation v o u t volta g e c ha n g e (% ) 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 2812d 2815d 2815d 2812d 2805d 2805d f igure 14 f igure 16 1v/div 20v/div 500 s / div fmtr2805s turn-on into no load v in v out 50 s/div 25% 50% fmtr2815d +v out step load response 100mv/div p out =15w 7.5w to 15w 15w to 7.5w 50 s/div 16 to 40v fmtr2805s step line response 20mv/div 20v/div v in v out f igure 11 50 s/div 50% 100% fmtr2805s step load response 100mv/div 25w to 12.5w 12.5w to 25w f igure 12 50 s/div 16 to 40 fmtr2815d step line response 20mv/div 20v/div v in +v out v out f igure 15 f igure 13
7 fmtr series 30 watt dc/dc c onverters materials header cold rolled steel/nickel/gold cover kovar/nickel pins #52 alloy/gold compression glass seal case u top view (pin side) 1.505 max (38.23) 3.005 (76.33) max. angled corner indicates pin one f igure 20: c ase u m aximum d imensions caution heat from reflow or wave soldering may damage the device. solder pins individually with heat application not exceeding 300 c for 10 seconds per pin. case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places, 0.01 (0.2) for two decimal places unless otherwise specified although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. please refer to the numerical dimensions for accuracy. angled corner indicates pin one. 1 2 3 4 5 6 12 11 10 9 8 7 0.000 0.050 (1.27) 0.000 0.120 (3.05) 0.250 (6.35) 0.450 (11.43) 0.650 (16.51) 0.850 (21.59) 1.050 (26.67) 1.250 (31.75) 1.380 (35.05) 1.505 (38.23) max. 0.000 0.120 (3.05) 0.250 (6.35) 2.750 (69.85) 2.880 (73.15) 3.005 (76.33) max. 0.128 dia (3.25). 0.040 dia (1.02) 0.23 (5.8) lead length 0.410 (10.41) max. 0.220 (5.59 seam seal top view case u f igure 21: c ase u
8 fmtr series 30 watt dc/dc c onverters test 125 c 125 c standard /es pre-cap inspection 25 c method 2017, 2032 yes yes temperature cycle (10 times) method 1010, cond. b, -55 c to 125 c no yes constant acceleration 25 c method 2001, 500 g no yes burn-in 96 hours at 125 c case (typical) no yes final electrical test mil-prf-38534, group a subgroups 1 and 4: +25 c case yes yes hermeticity testing 25 c fine leak, method 1014, cond. a no yes gross leak, method 1014, cond. c no yes gross leak, dip (1 x 10 -3 ) yes no final visual inspection 25 c method 2009 yes yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. e nvironmental s creening fmtr 28001-001-dts rev e. this revision supercedes all previous releases. all technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. interpoint reserves the right to make changes in products or specifications without notice. fmtr series is a trademark of interpoint. copyright ? 1994 - 2002 interpoint corporation. all rights reserved. contact information: interpoint headquarters usa phone: 1-800-822-8782 +425-882-3100 email: power@intp.com www.interpoint.com interpoint uk phone: +44-1252-872266 email: poweruk@intp.com interpoint france phone: +33-134285455 email: powerfr@intp.com
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