dma series ? open frame telecom dc-dc converter ? -48 vdc input ? etsi compliant ? nebs compliant ? 5 v standby & 12 v fan outputs ? remote on/off & power good signal ? ac input version available (ema212) the dma family complements the ema212 series, offering a feature-rich power converter for dc-input applications. the ema212 has been widely adopted in 1u networking systems, to include switching, routing, system monitoring, and video production racks. designers will now have the ability to integrate a power solution, adopted for normal mains operation or - 48v telecoms input requirements. the input to the dma212 meets the stringent input regulations for connecting to telecoms networks as seen in ets 300 132-2. features include abnormal voltage operation, reverse polarity, transient protection, surge limiting emc limits to etsi and nebs standards.
2 xppower.com characteristic minimum typical maximum units notes & conditions input voltage - operating 36 48 75 vdc can be configured as -48 vdc. see fig. 11 input current - full load 5 7 a input reverse voltage protection continuous protection with automatic recovery input transient etsi en300 132:2003 compliant undervoltage lockout protection 32 35 vdc inrush current 30 a 48 vdc input (1) . see fig. 1 input protection 15 a fast acting fuse (2) output characteristics characteristic minimum typical maximum units notes & conditions output voltage - v1 12 12 vdc see models and ratings table initial set accuracy v1:1, v2:5, v3:3 % 48 vdc input at 50% load output voltage adjustment % not fitted minimum load 10 % on v1 required to meet all specification parameters on v2 & v3. start up delay 2 3 s see fig. 2 hold-up time 4 ms drift 0.2 %/?c line regulation v1:0.5, v2:5, v3:3 % of nominal with input variation 36-75 vdc load regulation v1:1, v2:5, v3:3 % 10-100% load of nominal input transient response - v1 4 % recovery within 1% in less than 500 s for a 50-75-50% load step over/undershoot - v1 1 % ripple & noise 1 % pk-pk 20 mhz bandwidth see fig. 3 overvoltage protection 115 140 % vnom dc output 1 only, recycle input to reset overload protection 110 125 % i nom output 1 only auto restart. see fig. 4 short circuit protection continuous, trip & restart (hiccup) characteristic temperature coefficient 0.02 %/?c after 20 mins warm up models and ratings figure 1 typical inrush current characteristics (30 a) input voltage input current input characteristics note: 1. etsi en 300 132:2003 compliant 2. fuse fitted in -ve input line. see fig. 10 & 11. max output power (10 cfm air flow) output voltage v1 output current (10 cfm airflow) fan output v2 standby supply v3 model number 212 w 12.0 vdc 16.7 a 12.0 v/1.0 a 5.0 v/0.1 a DMA21248S12
xppower.com 3 start up delay from dc turn on ripple & noise figure 2: typical start up delay (1.65s) figure 3: typical ripple & noise (24 mv) input voltage input current overcurrent protection figure 4 typical over current profile 0 2 4 6 8 10 12 14 0 20 40 60 80 100 120 140 160 output load % output enters trip & restart (hiccup mode) output v
xppower.com xxxxxxxxxx 4 general specifications characteristic minimum typical maximum units notes & conditions efficiency 88 % see fig. 5 isolation: input to output input to ground output to ground 1500 vdc basic insulation 1000 vdc 500 vdc switching frequency 60 khz power density 11 w/in 3 mean time between failure: 550 khrs see note 1 weight 0.73 (330) lb (g) notes 1. compliant with mil-hdbk-217f, notice 2 +25 c gb efficiency vs load characteristics figure 5: typical efficiency 48 v input load % efficiency % 82% 83% 84% 85% 86% 87% 88% 89% 90% 0 20 40 60 80 100 signals characteristic notes & conditions signals combined input fail & dc ok open collector referenced to output 0v, transistor normally off when input & output good. power fail: provides 5 ms warning of loss of output from input failure (see fig. 6 ). dc ok: provides warning of dc output failure. remote on/off uncommited isolated opto-coupler diode - powered diode inhibits the supply (see fig. 6 ). current share for increased power, up to 3 supplies can be connected in parallel. output current is shared within 10% at full load. derate to 90%. the current share function is not designed to offer redundant operation. combined power fail & dc ok signal pin 6 cn3 power fail / dcok collector power fail / dcok emitter pin 2 cn2-ve power supply transistor on (<0.8 v): input & output not ok transistor off (>4.5 v): input & output ok 330r 5 v standby rtn pin 9 cn3 pin 8 cn3 5 v standby signal connector remote on/off pin 4 cn3 power supply 1k return pin 5 cn3 0 v or floating: psu on 4-6 v: psu off 5 ma 4-6 v 0 v 1k pin 2 cn2 (-ve) signal is an isolated control signal which can turn the psu off by supplying 5 ma into the pin. figure 6.
xppower.com 5 environmental characteristic minimum typical maximum units notes & conditions operating temperature 0 +70 ?c derate linearly at 2.5%/?c from +50 ?c to +70 ?c storage temperature -40 +80 ?c cooling - force-air cooled 10 cfm see thermal considerations operating humidity 0 95 %rh non-condensing. see page 5. note 1 & 3 storage humidity 0 95 %rh non-condensing. see page 5. note 2 & 3 operating altitude 3000 m see page 5. note 3 shock 3 x 30 g/11 ms shocks in both +ve & -ve directions along the 3 orthogonal axis, total 18 shocks. see page 5. note 1 & 4 vibration single axis 10-500 hz at 2 g x 10 sweeps. see page 5. note 1 & 5 safety agency approvals safety agency safety standard category cb report nemko #uk 38710, iec60950-1:2005 information technology csa csa certificate #1964073 csa22.2 no. 60950-1-03 / ul60950-1 information technology tuv tuv certificate # b 07 11 45240 008 en60950-1:2006 information technology ce lvd xxxxxxxxxx electromagnetic compatibility - emissions electromagnetic compatibility - immunity phenomenon standard test level criteria notes & conditions eft en61000-4-4 1 a surges en61000-4-5 1 a conducted en61000-4-6 2 a narrow & wide band noise etsi en 300 132-2:2003 phenomenon standard test level criteria notes & conditions conducted en55022 class a (6) see fig. 7 radiated en55022 class a (6) figure 7: dma212 at full load with 48 vdc input typical emc plot notes 1. compliant with ets 300 019-1-3 may 1992 + ammendment 1 june 1997 class 3.1. 2. compliant with ets 300 019-1-1 feb 1992 class 1.1, ets 300 019-1-2 feb 1992 class 2.2. 3. compliant with nebs gr-63-core issue 3. 4. compliant with en60068-2-27. 5. compliant with en60068-2-6. 6. compliant with en61204-3, etsi en 300 132-2 2003, etsi 300 386-1 1994, nebs gr-1089-core issue 4
xppower.com xxxxxxxxxx 6 mechanical details notes 1. all dimensions in inches (mm). tolerance .xx = 0.02 (0.50); .xxx = 0.01 (0.25) 2. units supplied with screw terminal (cn2) as standard. for faston type, add suffix -f to the part number. 3. all 4 mounting positions should be connected to safety earth. 4. the air flow needs to be directed through the power supply within the end application. air flow 12 cfm 4 x ? 0.14 (3.5) mounting holes cn3 (screw type) cn1 (screw type) safety earth - 4.8 mm faston fet2 t1 c35 c23 5.00 (127.0) 4.55 (115.6) 0.22 (5.7) 0.22 (5.7) 2.55 (64.8) 0.62 (15.8) 1.28 (32.6) 0.06 (1.6) 0.23 (5.7) 1.14 (28.9) 0.23 (5.7) cn2 0.08 (2.0) cn2 pin connections - cn2 1 +v2 2 v2 return 3 v2 return 4 rof 5 rof return 6 input fail/dc ok 7 current share 8 +v3 9 -v3 10 +v2 pin connections - cn3 1 +v1 2 v1 return pin connections - cn1 1 -vin 2 +vin 0.25 faston earth mating connectors: cn2: molex housing 51110-1050 and crimp 50394-8100.
xppower.com xxxxxxxxxx thermal considerations in order to ensure correct and reliable operation of the psu in the most adverse conditions permitted in the end-use equipment, the temperature of the components listed in the table below must not be exceeded. see drawing on page 6 for component locations. temperature should be monitored using k type thermocouples placed on the hottest part of the component (out of any direct air f low). temperature measurements (ambient 50 oc) component max temperature oc t1 130 ?c fet2 110 ?c c35 100 ?c c23 100 ?c service life the estimated service life of the dma is determined by the cooling arrangements and load conditions experienced in the end appl ication. due to the uncertain nature of the end application this estimated service life is based on the actual measured temperature of t wo key capacitors within the product when installed in the end application. the highest of the two component temperatures should be us ed. the graph below expresses the estimated lifetime for a given component temperature and assumes continuous operation at this temperature. input configuration the dma input is floating and can be configured for use with either +48 vdc or -48vdc for telecom applications estimated service life vs component temperature 5000 25000 45000 65000 85000 105000 125000 145000 165000 185000 105 95 85 75 65 c23 & c35 temperature (c) lifetime (hrs) 55 figure 8: +48 vdc configuration cn2 +48 v + - figure 9: -48 vdc configuration cn2 + - -48 v 01-aug-08
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