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dvtr2800t series 12009dsa 17921 bothell-everett highway, suite 108 bothell, wa 98012 http://www.vpt-inc.com sales information: phone: (425) 487-4850 fax: (425) 487-4802 e-mail: sales@vpt-inc.com 1 high reliability hybrid dc-dc converters description the dvtr series of high reliability dc-dc converters is operable over the full military (-55 c to +125 c) temperature range with no power derating. unique to the dvtr series is a fault tolerant magnetic feedback circuit. operating at a nominal fixed frequency of 325 khz per stage, these regulated, isolated units utilize well-controlled undervoltage lockout circuitry to eliminate slow start-up problems. these converters are designed and manufactured in a facility qualified to iso9001, compliant to as9000, and certified to mil-prf-38534 and mil-std-883. features high reliability very low output noise wide input voltage range: 15 to 50 volts per mil-std-704 up to 30 watts output power fault tolerant magnetic feedback circuit no use of optoisolators undervoltage lockout industry standard pinout high input transient voltage: 80 volts for 1 sec per mil-std-704a precision seam welded or solder seal hermetic package high power density: > 28 w/in 3 custom versions available additional environmental screening available meets mil-std-461c and mil-std-461d emc requirements when used with a dvmh28 emi filter flanged and non-flanged versions available. mil-prf-38534 element evaluated components figure 1 ? dvtr2800t / dvtr2800tf dc-dc converter ( not to scale )
dvtr2800t series 12009dsa 2 specifications (t case = -55c to +125c, v in = +28v 5%, full load 5 , unless otherwise specified) absolute maximum ratings input voltage (continuous) 50 v dc junction temperature rise to case +15c input voltage (transient, 1 second) 80 volts storage temperature -65c to +150c output power 30 watts lead solder temperature (10 seconds) 270c power dissipation (full load, t case = +125c) 10 watts weight 50 grams dvtr28512t DVTR28515T parameter conditions min typ max min typ max units static continuous 15 28 50 15 28 50 v input voltage transient, 1 sec 4 - - 80 - - 80 v inhibited - 3.5 7.5 - 3.5 7.5 ma current no load - 20 40 - 20 40 ma ripple current full load 5 , 20hz to 20mhz - 20 50 - 20 50 ma p-p inhibit pin input 4 0-1.50-1.5v inhibit pin open circuit voltage 4 13 15 17 13 15 17 v uvlo turn on 11.5 - 14.5 11.5 - 14.5 v uvlo turn off 4 11.0 - 14.5 11.0 - 14.5 v v main 4.95 5.0 5.05 4.95 5.0 5.05 v +v aux 11.88 12.0 12.12 14.85 15.0 15.15 v -v aux t case = 25c -12.24 -12.0 -11.76 -15.30 -15.0 -14.70 v v main 4.85 5.0 5.15 4.85 5.0 5.15 v +v aux 11.64 12.0 12.36 14.55 15.0 15.45 v output voltage -v aux t case = -55c to +125c -12.48 -12.0 -11.52 -15.60 -15.0 -14.40 v total 0 - 30 0 - 30 w v main 0 - 15 0 - 15 w power 4 v aux 6 0 - 15 0 - 15 w v main 0-3.00-3.0a current 3 v aux either output 6 0 - 0.87 0 - 0.70 a v main - 20 60 - 20 60 mv p-p ripple voltage v aux full load 5 , 20hz to 10mhz - 40 100 - 40 100 mv p-p v main - 10 25 - 10 25 mv +v aux - 15 50 - 15 50 mv line regulation -v aux v in = 15v to 50v - 20 100 - 20 100 mv v main - 10 25 - 10 25 mv +v aux - 10 50 - 10 50 mv load regulation -v aux no load to full load 5 - 50 250 - 50 250 mv cross regulation v aux +v out = 30%, -v out = 70% +v out = 70%, -v out = 30% --5--5% efficiency full load 5 74 79 - 75 80 - % overload 4 - - 15 - - 15 w load fault power dissipation short circuit - - 10 - - 10 w capacitive load 4 - - 500 - - 500 f switching frequency 600 650 700 600 650 700 khz synchronization frequency 7 700 750 800 700 750 800 khz isolation 500 v dc , t case = 25c 100 - - 100 - - m ? thermal resistance case to ambient ( ca) -25- -25-c/w mtbf (mil-hdbk-217f) aif @ t c = 55c - 307 - - 307 - khrs
dvtr2800t series 12009dsa 3 specifications (t case = -55c to +125c, v in = +28v 5%, full load 5 , unless otherwise specified) absolute maximum ratings input voltage (continuous) 50 v dc junction temperature rise to case +15c input voltage (transient, 1 second) 80 volts storage temperature -65c to +150c output power 30 watts lead solder temperature (10 seconds) 270c power dissipation (full load, t case = +125c) 10 watts weight 50 grams dvtr28512t DVTR28515T parameter conditions min typ max min typ max units dynamic v main - 200 400 - 200 400 mv pk load step output transient v aux - 500 700 - 500 700 mv pk v main - 200 400 - 200 400 sec load step recovery 2 v aux half load to full load - 200 400 - 200 400 sec v main - 200 400 - 200 400 mv pk line step output transient 4 v aux - 300 500 - 300 500 mv pk v main - 200 400 - 200 400 sec line step recovery 2, 4 v aux v in = 15v to 50v - 200 400 - 200 400 sec turn on delay - - 20 - - 20 msec turn on overshoot 2 v in = 0v to 28v --0--0mv pk notes: 1. this note intentionally not used. 2. time for output voltage to settle within 1% of its nominal value. 3. derate linearly to 0 at 135c. 4. verified by qualification testing. 5. 15w on v main and 15w on v aux . 6. up to 70% of the total auxiliary power or current can be drawn from either of the auxiliary outputs. 7. synchronization is ttl signal with v sync max = 6v.
dvtr2800t series 12009dsa 4 block diagram primary housekeeping su ppl y dual pwm controller pin 8 inh transformer isolated power feedforward transformer isolated error signal feedback voltage and current error amplifiers secondary houskeeping supply in com pin 10 28v in pin 1 +v main pin 2 out com pin 3 +v aux pin 5 -v aux pin 4 sync pin 9 figure 2
dvtr2800t series 12009dsa 5 connection diagram 10 in com 8 inh 1 28v in 5 +v aux 3 out com load + - 28 vdc 4 -v aux load sync 9 2 +v main load figure 3 inhibit drive connection diagrams 10 in com 8 inh 1 28v in optional capacitor bias 14v 15k 10 in com 8 inh 1 28v in optional capacitor bias 14v 15k optoisolator figure 4 ? internal inhibit circuit and recommended drive figure 5 ? isolated inhibit drive (shown with optional capacitor for turn-on delay) (shown with optional capacitor for turn-on delay)
dvtr2800t series 12009dsa 6 emi filter hookup diagram 10 in com 8 inh 1 28v in 5 +v aux 3 out com load + - 28 vdc 2 28v out 4 out com 1 28v in 5 in com 3 dvmc28 emi filter 6, 7 dvtr2800t dc-dc converter case 4 -v aux load sync 9 2 +v main load figure 6 ? converter with emi filter
dvtr2800t series 12009dsa 7 efficiency performance curves (t case = 25c) v in = 15v v in = 28v v in = 50v 50 55 60 65 70 75 80 85 - 5 10 15 20 25 30 35 40 output power [w] figure 7 ? dvtr28512t efficiency (%) vs. output power (w) 50 55 60 65 70 75 80 85 - 5 10 15 20 25 30 35 40 output power [w] figure 8 ? DVTR28515T efficiency (%) vs. output power (w)
dvtr2800t series 12009dsa 8 emi performance curves (t case = 25c, v in = +28v 5%, full load, unless otherwise specified) figure 9 ? dvtr2800t without emi filter figure 10 ? dvtr2800t with emi filter
dvtr2800t series 12009dsa 9 package specifications (non-flanged, solder seal) top view side view pin function 1 28v in 2+v main 3out com 4 -v aux 5 +v aux 6 case 7 case 8 inhibit 9sync 10 in com bottom view figure 11 ? non-flanged, solder seal package and pinout (dimensional limits are 0.005? unless otherwise stated)
dvtr2800t series 12009dsa 10 package specifications (non-flanged, seam seal) top view side view pin function 1 28v in 2+v main 3out com 4 -v aux 5 +v aux 6 case 7 case 8 inhibit 9sync 10 in com bottom view figure 12 ? non-flanged, seam seal package and pinout (/hb screened units only) (dimensional limits are 0.005? unless otherwise stated)
dvtr2800t series 12009dsa 11 package specifications (flanged, solder seal) top view side view pin function 1 28v in 2+v main 3out com 4 -v aux 5 +v aux 6 case 7 case 8 inhibit 9sync 10 in com bottom view figure 13 ? flanged, solder seal package and pinout (dimensional limits are 0.005? unless otherwise stated)
dvtr2800t series 12009dsa 12 package specifications (flanged, seam seal) top view side view pin function 1 28v in 2+v main 3out com 4 -v aux 5 +v aux 6 case 7 case 8 inhibit 9sync 10 in com bottom view figure 14 ? flanged, seam seal package and pinout (/hb screened units only) (dimensional limits are 0.005? unless otherwise stated)
dvtr2800t series 12009dsa 13 package pin description pin function description 1 28v in positive input voltage connection 2 +v main positive main output voltage connection 3 out com output common connection 4 -v aux negative auxiliary output voltage connection 5 +v aux positive auxiliary output voltage connection 6 case case connection 7 case case connection 8 inhibit logic low = disabled output. connecting the inhibit pin to input common causes converter shutdown. logic high = enabled output. unconnected or open collector ttl. 9 sync synchronization signal 10 in com input common connection environmental screening (per mil-std-883 as referenced to mil-prf-38534, class h) screening mil-std-883 standard (no suffix) extended /es hb /hb pre-cap inspection method 2017, 2032 internal procedure temperature cycling method 1010, condition c method 1010, -55c to 125c constant acceleration method 2001, condition a method 2001, 500g burn-in method 1015, 160 hours at +125c 96 hours at +125c 24 hours at +125c hermeticity method 1014, fine leak, condition a method 1014, gross leak, condition c dip (1 x 10 -3 ) final electrical mil-prf-38534, group a 1 100% at 25c final inspection method 2009 note: 1. 100% r&r testing at ?55c, +25c, and +125c with all test data included in product shipment.
dvtr2800t series 12009dsa 14 ordering information dvtr 28 5 12 t f /hb - xxx 1 234567 8 (1) (2) (3) (4) product series nominal input voltage main output voltage auxiliary output voltages dvtr 28 28 volts 5 + 5 volts 12 15 12 volts 15 volts (5) (6) (7) (8) number of outputs package option screening code additional screening code t triple none f non-flanged flanged none /es /hb standard extended hb contact sales please contact your sales representative or the vpt inc. sales department for more information concerning additional environmental screening and test ing, different input voltage, output voltage, power requirement, source inspection, and/or special element evaluation for space or other higher quality applications. contact information to request a quotation or place an order please contact your sales representative or the vpt inc. sales department at: phone : (425) 487-4850 fax : (425) 487-4802 e-mail : sales@vpt-inc.com all information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible erro rs or omissions. the products or specifications contained herein are subject to change without notice.

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