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dvhf+2800t series 12006dsa 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 dvhf+ 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 dvhf+ 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 15 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 projection welded hermetic package high power density: > 37 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 ? dvhf+2800t / dvhf+2800tf dc-dc converter ( not to scale )
dvhf+2800t series 12006dsa 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 15 watts lead solder temperature (10 seconds) 270c power dissipation (full load, t case = +125c) 6.5 watts weight 24 grams dvhf+28512t dvhf+28515t 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 5.0 - 3.5 5.0 ma current no load - - 40 - - 40 ma ripple current full load 5 , 20hz to 20mhz - 40 60 - 40 60 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 - 15 0 - 15 w v main 0-7.50-7.5w power 4 v aux 6 0-7.50-7.5w v main 0-1.50-1.5a current 3 v aux either output 6 0 - 0.44 0 - 0.35 a v main - 40 60 - 40 60 mv p-p ripple voltage v aux full load 5 , 20hz to 10mhz - 60 120 - 60 120 mv p-p v main - 10 25 - 10 25 mv line regulation v aux v in = 15v to 50v - 15 50 - 15 50 mv v main - 5 25 - 5 25 mv +v aux - 10 50 - 10 50 mv load regulation -v aux no load to full load 5 - 20 250 - 20 250 mv cross regulation v aux +v out = 30%, -v out = 70% +v out = 70%, -v out = 30% --5--5% efficiency full load 5 74 77 - 74 77 - % overload 4 --7.5--7.5w load fault power dissipation short circuit - - 7.5 - - 7.5 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 - 350 - - 350 - khrs
dvhf+2800t series 12006dsa 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 15 watts lead solder temperature (10 seconds) 270c power dissipation (full load, t case = +125c) 6.5 watts weight 24 grams dvhf+28512t dvhf+28515t parameter conditions min typ max min typ max units dynamic v main - 200 400 - 200 400 mv pk load step output transient v aux - 400 500 - 400 500 mv pk v main - 450 600 - 450 600 sec load step recovery 2 v aux half load to full load - 300 600 - 300 600 sec v main - 50 150 - 50 150 mv pk line step output transient 4 v aux - 150 250 - 150 250 mv pk v main - 100 200 - 100 200 sec line step recovery 2, 4 v aux v in = 15v to 50v - 100 200 - 100 200 sec turn on delay - - 10 - - 10 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. 7.5w on v main and 7.5w 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.
dvhf+2800t series 12006dsa 4 block diagram primary housekeeping supply dual pwm controller pin 1 inh transformer isolated power feedforward transformer isolated error signal feedback voltage error amplifiers secondary houskeeping supply in com pin 8 28v in pin 9 +v main pin 2 out com pin 3 +v aux pin 4 -v aux pin 5 sync pin 7 figure 2
dvhf+2800t series 12006dsa 5 connection diagram 8 in com 1 inh 9 28v in 4 +v aux 3 out com load + - 28 vdc 5 -v aux load sync 7 2 +v main load figure 3 inhibit drive connection diagrams 8 in com 1 inh 9 28v in optional capacitor bias 14v 15k 8 in com 1 inh 9 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)
dvhf+2800t series 12006dsa 6 emi filter hookup diagram 8 in com 1 inh 9 28v in 4 +v aux 3 out com load + - 28 vdc 2 28v out 4 out com 1 28v in 5 in com 3 dvmh28 emi filter 6 dvhf+2800t dc-dc converter case 5 -v aux load sync 7 2 +v main load figure 6 ? converter with emi filter
dvhf+2800t series 12006dsa 7 efficiency performance curves (t case = 25c) v in = 15v v in = 28v v in = 50v figure 7 ? dvhf+28512t efficiency (%) vs. output power (w) figure 8 ? dvhf+28515t efficiency (%) vs. output power (w)
dvhf+2800t series 12006dsa 8 emi performance curves (t case = 25c, v in = +28v 5%, full load, unless otherwise specified) figure 9 ? dvhf+2800t without emi filter figure 10 ? dvhf+2800t with emi filter
dvhf+2800t series 12006dsa 9 package specifications (non-flanged) top view side view pin function 1 inhibit 2+v main 3out com 4 +v aux 5 -v aux 6 case 7sync 8 in com 9 28v in bottom view figure 11 ? non-flanged package and pinout (dimensional limits are 0.005? unless otherwise stated)
dvhf+2800t series 12006dsa 10 package specifications (flanged) top view side view pin function 1 inhibit 2+v main 3out com 4 +v aux 5 -v aux 6 case 7sync 8 in com 9 28v in bottom view figure 12 ? flanged package and pinout (dimensional limits are 0.005? unless otherwise stated)
dvhf+2800t series 12006dsa 11 package pin description pin function description 1 inhibit logic low = disabled output. connecting the inhibit pin to input common causes converter shutdown. logic high = enabled output. unconnected or open collector ttl. 2 +v main positive main output voltage connection 3 out com output common connection 4 +v aux positive auxiliary output voltage connection 5 -v aux negative auxiliary output voltage connection 6 case case connection 7 sync synchronization signal 8 in com input common connection 9 28v in positive input voltage 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.
dvhf+2800t series 12006dsa 12 ordering information dvhf+ 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 dvhf+ 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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