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dvsb2800d series ds1x046h 11314 4th avenue west, suite 206 everett, wa 98204 http://www.vpt-inc.com sales information: phone: (425) 353-3010 fax: (425) 353-4030 e-mail: vptsales@vpt-inc.com 1 high reliability hybrid dc-dc converters description the dvsb 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 dvsb series are robust and effective input and output filters which provide dramatically reduced input and output noise performance when compared to other manufacturers competing devices. operating at a nominal fixed frequency of 325 khz, per stage, these regulated, isolated units utilize a high speed magnetic feedback design and well controlled undervoltage lockout circuitry to eliminate slow start-up problems. these converters are designed and manufactured in a facility qualified to iso9001 and certified to mil- prf-38534 and mil-std-883. this product may incorporate one or more of the following u.s. patents: 5,784,266 5,790,389 5,963,438 5,999,433 6,005,780 6,084,792 6,118,673 features ? high reliability ? very low output noise ? wide input voltage range: 15 to 50 volts per mil-std-704 ? up to 12.5 watts output power ? fault tolerant magnetic feedback circuit ? no use of optoisolators ? undervoltage lockout ? indefinite short circuit protection ? current limit protection ? high input transient voltage: 80 volts for 1 sec per mil-std-704a ? precision projection welded hermetic package ? high power density ? 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 ? dvsb2800d / dvsb2800 df dc-dc converter ( not to scale )
dvsb2800d series ds1x046h 2 specifications (t case = -55c to +125c, v in = +28v 5%, full load, unless otherwise specified) absolute maximum ratings input voltage (continuous) 50 v dc junction temperature rise to case +15c input voltage (transient, 1 second) 80 vo lts storage temperature -65c to +150c output power 12.5 watts lead solder temperature (10 seconds) 270c power dissipation (full load, t case = +125c) 6.0 watts weight (maximum) (un-flanged / flanged) (24 / 28) grams DVSB2853R3D parameter conditions min typ max units static continuous 15 28 50 v input voltage 4 transient, 1 sec 4 - - 80 v inhibited - 3.5 5.0 ma current no load - - 60 ma ripple current full load, 20hz to 10mhz - 40 60 ma p-p inhibit pin input 4 0 - 1.5 v inhibit pin open circuit voltage 4 12 14 17 v uvlo turn on 10.5 - 14.5 v uvlo turn off 4 8.5 - 13.5 v v out1 4.95 5.0 5.05 v v out2 t case = 25c 3.267 3.3 3.333 v v out1 4.925 5.0 5.075 v output voltage v out2 t case = -55c to +125c 3.25 3.3 3.35 v total 0 - 12.5 w v out1 0 - 7.5 w power 3,4 v out2 0 - 5 w v out1 0 - 1.5 a current 3 v out2 0 - 1.5 a v out1 ripple voltage v out2 full load, 20hz to 10mhz - 40 60 mv p-p v out1 line regulation v out2 v in = 15v to 50v - 0 25 mv v out1 load regulation v out2 no load to full load - 10 50 mv v out1 cross regulation v out2 v out1 = 0%, v out2 = 100% v out1 = 100%, v out2 = 0% - 10 50 mv efficiency full load 69 74 - % overload 4 - - 10 w load fault power dissipation short circuit - - 10 w capacitive load 4 either output - - 500 f switching frequency 550 650 700 khz synchronization frequency 5 700 750 800 khz isolation 500 v dc , t case = 25c 100 - - m ? mtbf (mil-hdbk-217f) aif @ t c = 55c - 350 - khrs
dvsb2800d series ds1x046h 3 specifications (t case = -55c to +125c, v in = +28v 5%, full load, unless otherwise specified) absolute maximum ratings input voltage (continuous) 50 v dc junction temperature rise to case +15c input voltage (transient, 1 second) 80 vo lts storage temperature -65c to +150c output power 12.5 watts lead solder temperature (10 seconds) 270c power dissipation (full load, t case = +125c) 6.0 watts weight (maximum) (un-flanged / flanged) (24 / 28) grams DVSB2853R3D parameter conditions min typ max units dynamic v out1 load step output transient v out2 - 200 400 mv pk v out1 load step recovery 2 v out2 half load to full load - 450 700 sec v out1 line step output transient 4 v out2 - 100 400 mv pk v out1 line step recovery 2, 4 v out2 v in = 16v to 40v - 300 600 sec turn on delay - - 20 msec v out1 - - 25 mv pk turn on overshoot v out2 v in = 0v to 28v - - 15 mv pk notes: 1. this note intentionally not used. 2. time for output voltage to settl e within 1% of its nominal value. 3. derate linearly to 0 at 135c. 4. verified by qualification testing. 5. synchronization is ttl signal with v sync max = 6v.
dvsb2800d series ds1x046h 4 block diagram pr imar y ho usek eepin g su pply du al pwm controller pin 1 inh tr ansf orm er isolated po wer feedforwar d tr ansf orm er isolated er ror signal feedback vo ltag e er ror am plifiers sec ond ary ho uske epin g su pply in c om pin 8 28v in pin 9 +vout1 pin 2 ou t co m pin 3 +vout2 pin 4 syn c pin 7 figure 2
dvsb2800d series ds1x046h 5 connection diagram 8 in c om 1 inh 9 28v in 4 +vout2 3 ou t co m loa d + - 28 v dc syn c 7 2 +vout1 loa d 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)
dvsb2800d series ds1x046h 6 emi filter hookup diagram 8 in com 1 inh 9 28v in 4 +vout2 3 out com load + - 28 vdc 2 28v out 4 out com 1 28v in 5 in com 3 dvmh28 emi filter 6 DVSB2853R3D dc-dc converter case sync 7 2 +vout1 load figure 6 ? converter with emi filter
dvsb2800d series ds1x046h 7 efficiency performance curves (t case = 25c) v in = 15v v in = 28v v in = 50v 50 55 60 65 70 75 80 2 4 6 8 10 12 14 output power (w) efficiency (%) figure 7 ? DVSB2853R3D efficiency (%) vs. output power (w)
dvsb2800d series ds1x046h 8 emi performance curves (t case = 25c, v in = +28v 5%, full load, unless otherwise specified) figure 9 ? DVSB2853R3D without emi filter figure 10 ? DVSB2853R3D with emi filter
dvsb2800d series ds1x046h 9 package specifications (non-flanged) pin function pin function pin function 1 inhibit 4 +vout2 7 sync 2 +vout1 5 n/c 8 in com 3 out com 6 case 9 28v in figure 11 ? non-flanged package and pinout
dvsb2800d series ds1x046h 10 package specifications (flanged) pin function pin function pin function 1 inhibit 4 +vout2 7 sync 2 +vout1 5 n/c 8 in com 3 out com 6 case 9 28v in figure 12 ? flanged package and pinout
dvsb2800d series ds1x046h 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 +vout1 positive output 1 voltage connection 3 out com output common connection 4 +vout2 positive output 2 voltage connection 5 n/c no connection 6 case case connection 7 sync synchronization signal 8 in com input common connection 9 28v in positive input voltage connection
dvsb2800d series ds1x046h 12 environmental screening (100% tested per mil-std-883 as referenced to mil-prf-38534) notes: 1. 100% r&r testing at ?55c, +25c, and +125 c with all test data included in product shipment. 2. pind test certificate of co mpliance included in product shipment. 3. radiographic test cert ificate of compliance and film(s) included in product shipment. screening mil-std-883 standard (no suffix) extended /es hb /hb class h /h class k /k non- destructive bond pull method 2023 ? ? ? ? ? internal visual method 2017, 2032 internal procedure ? ? ? ? ? temperature cycling method 1010, condition c method 1010, -55c to 125c ? ? ? ? constant acceleration method 2001, 3000g, y1 direction method 2001, 500g, y1 direction ? ? ? ? pind method 2020, condition a 2 ? pre burn-in electrical 100% at 25c ? burn-in method 1015, 320 hours at +125c method 1015, 160 hours at +125c 96 hours at +125c 24 hours at +125c ? ? ? ? ? final electrical mil-prf-38534, group a 1 100% at 25c ? ? ? ? ? hermeticity method 1014, fine leak, condition a method 1014, gross leak, condition c dip (1 x 10 -3 ) ? ? ? ? ? ? ? ? ? radiography method 2012 3 ? external visual method 2009 ? ? ? ? ?
dvsb2800d series ds1x046h 13 ordering information dvsb 28 5 3r3 d f /hb - xxx 1 2 3 4 5 6 7 8 (1) (2) (3) (4) product series nominal input voltage output 1 voltage output 2 voltage dvsb 28 28 volts 5 +5 volts 3r3 +3.3 volts (5) (6) (7) (8) number of outputs package option screening code 1,2 additional screening code d dual none f non-flanged flanged none /es /hb /h /k standard extended hb class h class k contact sales notes: 1. contact the vpt inc. sales department for availability of class h (/h) or class k (/k) qualified products. 2. vpt inc. reserves the right to ship higher screen ed or smd products to meet lower screened orders at our sole discretion unless specifically forbidden by customer contract. please contact your sales representative or the vpt inc. sales department for more information concerning additional environmental screening and testing, different input voltage, output voltage, power requirement, source inspection, and/or special element evaluation for space or other higher quality applications.
dvsb2800d series ds1x046h 14 smd (standard microci rcuit drawing) numbers standard microcircuit drawing (smd) dvsb2800d series similar part number 5962-0820701hxc 5962-0820701hyc DVSB2853R3D/h DVSB2853R3Df/h do not use the dvsb2800d series similar part number for smd product acquisition. it is listed for reference only. for exact specifications for the smd product, refer to the smd drawing. smd?s can be downloaded from the dscc website at http://www.dscc.dla.mil/programs/smcr/ . the smd number listed above is for mil-prf-38534 class h screening, standard gold plated lead finish, and no rha (radiation hardness assurance) level. please reference the smd for other screening levels, lead finishes, and radiation levels. contact information to request a quotation or place orders please contac t your sales representative or the vpt inc. sales department at: phone : (425) 353-3010 fax : (425) 353-4030 e-mail : vptsales@vpt-inc.com all information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible errors or omissions. the products or specifications contained herein are subject to change without notice.

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