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uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 1 of 16 www.murata-ps.com www.murata-ps.com/support for full details go to www.murata-ps.com/rohs $ features ? the most i out /p out in this format ? lower priced than bricks ? small 1.6" x 2" x 0.4" plastic package with standard 2" x 2" pinout ? output con? gurations: 1.2/1.5/1.8/2.5v out @ 10 amps 3.3/5v out @ 25 watts 5/12/15v out @ 30 watts ? five input ranges from 9-75 volts ? ef? ciencies as high as 91.5% ? stable no-load operation ? optional sense pins for low v out ? thermal shutdown, i/o protected ? 1500 vdc i/o basic insulation ? ul/en60950-1 certi? ed (2nd edition); ce marked for q48 models ? rohs compliant the uhe 12-30w series of high-ef? ciency, isolated dc/dcs provide output power ranging from 10 amps @ 1.2v to 2 amps @ 15v. offering both 2:1 and 4:1 input voltage ranges, uhes meet v in requirements from 9 to 75 volts. taking full advantage of the synchronous- recti? er, forward topology, uhes boast outstanding ef? ciency (some models exceed 91%) enabling full-power operation to ambient temperatures as high as +60c, without air ? ow. assembled using fully automated, smt-on-pcb techniques, uhes provide stable no-load operation, excellent line (0.1%) and load (0.15%) regulation, quick step response (200sec), and low output ripple/noise (50-100mvp-p). additionally, the uhes unique output design eliminates one of the topologys few shortcomingsCoutput reverse conduction. all devices feature full i/o fault protection including: input overvoltage and undervoltage shutdown, precise output overvoltage protection (a rarity on low-voltage outputs), output current limiting, short-circuit protection, and thermal shutdown. all uhe models incorporate a v out trim function and an on/off control pin (positive or negative logic). low-voltage models (1.2v to 5v) offer optional sense pins facilitating either remote load regulation or current sharing for true n+1 redun- dancy. all models are certi? ed to the basic insula- tion requirements of ul/en60950-1 (2nd edition), and 48v in (75v max.) models carry the ce mark. selected models are rohs compliant (reduction of hazardous substances). product overview Coutput (7) Csense (8) +input (1) Cinput (2) pwm controller reference & error amp thermal shutdown opto isolation opto isolation uvlo & ovlo comparators overvoltage comparator on/off control (4) v out trim (9) +output (6) +sense (5) switch control * one phase of two is shown. c optional comparator feedback. contact mps. d sense pins are optional on 1.2-5v out models ("r" suf? x). typical topology is shown. typical units figure 1. simpli? ed block diagram housed in smaller, 1.6" x 2" x 0.40" (41 x 51 x 10.2mm) packages carrying the standard 2" x 2" pinout, mpss new uhe series dc/dc converters deliver more current/power (up to 10a/30w) than currently available from either package size.
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 2 of 16 www.murata-ps.com/support performance specifications summary and ordering guide ? model family (see model numbering on page 3) output input ef? ciency package (case/ pinout) v out (volts) i out (amps) r/n (mvp-p) ? regulation (max.) v in nom. (volts) range (volts) i in ? (ma/a) typ. max. line load ? min. typ. uhe-1.2/10000-d12-c 1.2 10 80 120 0.1% 0.36/0.9% 12 9-18 75/1.2 81% 83.5% c32, p51/52 uhe-1.2/10000-d24-c 1.2 10 80 120 0.1% 0.25/0.9% 24 18-36 35/0.6 82.2% 83% c32, p51/52 uhe-1.2/10000-d48-c 1.2 10 80 120 0.1% 0.3/0.625% 48 36-75 35/0.31 81% 83% c32, p51/52 uhe-1.5/10000-d24-c 1.5 10 55 80 0.1% 0.15/0.625% 24 18-36 35/0.73 84% 85.5% c32, p51/52 uhe-1.5/10000-d48-c 1.5 10 55 80 0.1% 0.15/0.625% 48 36-75 35/0.38 82.5% 84% c32, p51/52 uhe-1.8/10000-d24-c 1.8 10 70 90 0.1% 0.15/0.625% 24 18-36 35/0.86 85.5% 87% c32, p51/52 uhe-1.8/10000-d48-c 1.8 10 50 75 0.1% 0.15/0.625% 48 36-75 35/0.44 83.5% 85% c32, p51/52 uhe-2.5/10000-d24-c 2.5 10 50 100 0.075% 0.15/0.5% 24 18-36 35/1.23 87.7% 88.7% c32, p51/52 uhe-2.5/10000-d48-c 2.5 10 65 120 0.1% 0.15/0.5% 48 36-75 35/0.59 87% 88.5% c32, p51/52 uhe-3.3/7500-q12-c 3.3 7.5 70 90 0.25% 0.2/0.5% 24 9-36 50/1.17 85% 88% c32, p51/52 uhe-3.3/7500-q48-c 3.3 7.5 90 125 0.35% 0.5% 48 18-75 38/0.57 88% 90% c32, p51/52 uhe-3.3/7500-d48-c 3.3 7.5 80 100 0.2% 0.5% 48 36-75 35/0.6 86.7% 88.7% c32, p51/52 uhe-3.3/7500-d48t-c 3.3 7.5 80 100 0.2% 0.5% 48 36-75 35/0.58 85.5% 88.2% c32, p51 uhe-5/5000-q12-c 5 5 50 70 0.1% 0.15/0.3% 24 9-36 50/1.2 86% 87.5% c32, p51/52 uhe-5/5000-q48-c 5 5 60 90 0.05% 0.15/0.3% 48 18-75 38/0.58 87.5% 90% c32, p51/52 uhe-5/6000-q12-c 5 6 50 70 0.1% 0.3% 24 9-36 50/1.44 86.5% 87% c32, p51/52 uhe-5/6000-d48-c 5 6 80 100 0.2% 0.25/0.5% 48 36-75 45/0.7 87.5% 89% c32, p51/52 uhe-5/6000-d48t-c 5 6 65 100 0.2% 0.5% 48 36-75 45/0.7 87.5% 91% c32, p51 uhe-5/6000-q48t-c 5 6 55 80 0.08% 0.15% 48 18-75 38/0.69 88.5% 90% c32, p51 uhe-12/2500-q12-c 12 2.5 125 165 0.1% 0.5% 24 9-36 55/1.43 85.5% 87.5% c32, p51 uhe-12/2500-d12-c 12 2.5 65 100 0.2% 0.3% 12 9-18 90/2.81 87% 89% c32, p51 uhe-12/2500-d24-c 12 2.5 65 100 0.2% 0.3% 24 18-36 55/1.39 88% 90% c32, p51 uhe-12/2500-q48-c 12 2.5 100 120 0.1% 0.5% 48 18-75 30/0.6 88% 90% c32, p51 uhe-12/2500-d48-c 12 2.5 60 100 0.2% 0.3% 48 36-75 30/0.7 90% 92% c32, p51 uhe-15/2000-d12-c 15 2 70 100 0.2% 0.3% 12 9-18 110/2.81 87% 89% c32, p51 uhe-15/2000-q12-c 15 2 70 100 0.05% 0.15% 24 9-36 50/1.4 88% 89.5% c32, p51 uhe-15/2000-d24-c 15 2 70 100 0.2% 0.3% 24 18-36 70/1.39 88% 90% c32, p51 uhe-15/2000-q48-c 15 2 100 150 0.1% 0.5% 48 18-75 45/0.69 88% 90% c32, p51 uhe-15/2000-d48-c 15 2 70 100 0.2% 0.3% 48 36-75 35/0.7 90% 92% c32, p51 c typical at t a = +25c under nominal line voltage and full-load conditions, unless noted. d ripple/noise (r/n) is tested/speci? ed over a 20mhz bandwidth. all models are speci? ed with an external 0.47f multi-layer ceramic capacitor installed across their output pins. e nominal line voltage, no-load/full-load conditions. f devices have no minimum-load requirements and will regulate under no-load conditions. regulation speci? cations describe the output voltage deviation as the line voltage or load (with/without sense option) is varied from its nominal/midpoint value to either extreme. obsolete obsolete obsolete obsolete obsolete obsolete obsolete obsolete
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 3 of 16 www.murata-ps.com/support part number structure options and adaptations optional functions and part number suf? xes the versatile uhe, 12-30w dc/dc converters offer numerous electrical and mechanical options. per the ordering guide on page 2, the trailing dxx or qxx (where xx stands for 12, 24 or 48v in ) in each part number pertains to the base part number. part-number suf? xes are added after this input identi? cation, indicating the selection of standard options. the resulting part number is a "standard product" and is available to any customer desiring that particular combination of options. the on/off control function on pin 4 employs a positive logic (on = open or "high," no suf? x). to request a negative logic on this pin/function, add an "n" suf? x to the part number. standard models have no pins in the pins 5 and 8 positions. for 5-10a models (1.2-5v out ), sense pin/functions can be added to these positions (see pinout p52) by adding an "r" suf? x. an "nr" suf? x can be added for both negative-logic and sense-pin options. see below. suf? x description blank positive logic on/off control function (pin 4), v out trim (pin 9), no sense pins, pin length 0.2 inches (5.08 mm). n add negative logic on the on/off control function, vout trim (pin 9), no sense pins. r positive logic on the on/off control function, v out trim (pin 9), sense pins in the pin 5 and pin 8 positions (available for low v out models only). available under special order. nr negative logic on the on/off control function, v out trim (pin 9), +/C sense pins in the pin 5 and pin 8 positions (available for low v out models only). available under special order. alternate pin lengths are available under special order t alternate trim con? guration. special order only. -c full rohs-6 compliance. -y rohs-5 hazardous substance compliance with lead exception. rohs-5 compliance requires a scheduled quantity order. not all rohs-5 -y models are available. please contact product marketing for further information. adaptations there are various additional con? gurations available on uhe, 12-30w dc/dcs. because designating each of them with a standard part-number suf? x is not always feasible, such are designated by mps in assigning a 5-digit adaptation code after the part-number suf? xes. contact mps directly if you are interested in your own set of options/adaptations. our policy for minimum order quantities may apply. consequently, the following products are offered for sale: uhe-5/6000-d48n-30749 uhe-5/6000-d48n-30749-y (rohs-5) standard product, 48v in , 5v/6a output with negative logic on the on/off control function, modi? ed trim function (5% trim up = 9.09k, 5% trim down = 3.83k, compatible with uep-30750), integrated soft start and with input ovp and thermal shutdown removed. rohs-5 compliance refers to the exclusion of the six hazardous substances in the rohs speci? cation with the excepion of lead. mpss rohs-5 products use all the conforming rohs materials, however our solders contain lead. uhe-3.3/7500-d48thl2-y and uhe-5/6000-d48thl2-y (rohs-5) special trim, conformal coating, 3.68mm pin length, positive on/off logic, rohs-5 hazardous substance compliance (with lead). maximum rated output current in ma high ef? ciency output con? guration: u = unipolar nominal output voltage: 1.2, 1.5, 1.8, 2.5, 3.3, 5, 12 or 15 u he - / d48 - 3.3 7500 n note: some model number combinations may not be available. contact murata power solutions. input voltage range: d12 = 9-18 volts d24 = 18-36 volts d48 = 36-75 volts q12 = 9-36 volts q48 = 18-75 volts on/off logic blank = positive logic, standard n = negative logic r = see below nr = see below c rohs-6 hazardous substance compliant (does not claim eu exemption 7b, lead in solder) - optional, special order }
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 4 of 16 www.murata-ps.com/support mechanical specifications * pins 5 and 8 are installed for optional r-suf? x versions of 1.2-5v out models. if installed, always connect the sense pins either to a remote load or to their respective v out pin. see page 3 for complete part number structure & ordering details. 6 plastic case 0.040 0.001 dia. (1.016 0.025) 0.20 min (5.08) 2.00 (50.8) 0.40 (10.2) standoff 0.020 (0.5) 1.800 (45.72) 0.10 (2.54) 0.200 (5.1) 0.200 (5.1) 0.20 (5.1) 0.400 (10.16) 0.100 (2.5) 1.60 (40.6) bottom view 9 5 8 7 1 2 4 3 0.400 (10.16) 2 eq. sp. @ 0.200 (5.08) 0.400 (10.2) input/output connections pin function p51 function p52 1 +input +input 2 Cinput Cinput 3 no pin no pin 4 on/off control on/off control 5 no pin sense* 6 +output +output 7 Coutput Coutput 8 no pin Csense* 9 tr im tr im third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 2?
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 5 of 16 www.murata-ps.com/support output overvoltage protection: magnetic feedback 1.2v outputs 1.5-2.1 volts 1.5v outputs 1.8-2.4 volts 1.8v outputs 2.2-2.8 volts 2.5v outputs 2.8 to 3.2 volts 3.3v outputs 4 to 4.8 volts 5v outputs 6.1-7.5 volts 12v outputs 12.7-13.5 volts 15v outputs 15.8-16.2 volts maximum capacitive loading: 10,000f (1.2-5v out ) (low esr capacitor) 2,000f (12-15v out ) dynamic characteristics dynamic load response: (50-100% load step to 3% v out ) 200sec maximum ? start-up time: ? 8msec typical v in to v out and on/off to v out 15msec maximum uhe-15/2000-q12 30ms typ., 50ms max. switching frequency 150-350khz (model dependent) environmental mtbf ? uhe-12/2500-q12 5,885,546 hours operating temperature (ambient): ? C40 to +85c with derating (see derating curves) thermal shutdown +115c to +130c storage temperature C55 to +125c flammability ul 94 v-0 physical dimensions 1.6" x 2" x 0.40" (40.64 x 50.8 x 10.16mm) case material diallyl phthalate pin material gold-plated copper alloy weight 1.51 ounces (46.9 grams) primary to secondary insulation level basic performance/functional speci? cations typical @ t a = +25c under nominal line voltage and full-load conditions, unless noted. ? ? input input voltage range: d12 models (start up at 10v max.) 9-18 volts (12v nominal) q12 models (start up at 10v max.) 9-36 volts (24v nominal) d24 models 18-36 volts (24v nominal) q48 models 18-75 volts (48v nominal) d48 models 36-75 volts (48v nominal) overvoltage shutdown: d12 models 18.5-23 volts q12/d24 models 37-42 volts d48/q48 models not applicable start-up threshold: ? d12/q12 models 9.4-10 volts d24/q48 models 15.5-18 volts d48 models 33.5-36 volts undervoltage shutdown: ? d12/q12 models 7.0-8.8 volts d24/q48 models 15-17 volts d48 models 32-35.5 volts input current: normal operating conditions see ordering guide standby mode (off, ov, uv) 5ma input re? ected ripple current ? 2.5-10map-p input filter type lc or pi type reverse-polarity protection brief duration, 5a maximum remote on/off control (pin 4): ? positive logic (standard) on = open, open collector, or to +15v applied. i in = 2.6ma max. off = pulled low to 0-0.8v. i in = 2ma max. negative logic ("n" suf? x models) on = pulled low to 0-0.8v. i in = 6ma max. off = open, open collector or to +15v applied. i in = 1ma max. output v out accuracy (50% load): initial 1.5% temperatue coef? cient 0.02% per c extreme (5) 3% minimum loading for speci? cation: ? no load ripple/noise (20mhz bw) ? see ordering guide line/load regulation see ordering guide ef? ciency see ordering guide v out trim range (6) 5% minimum (10% for t models) remote sense compensation ? 5% isolation voltage: input-to-output 1500vdc minimum (basic) isolation capacitance 650pf isolation resistance 100m : current limit inception (@98%v out ): ? 10 amp models 12-15 amps 7.5 amp models 8.2-11.5 amps 5/6 amp models 6.5-8.5 amps 2.5 amp models 2.6-4 amps 2.0 amp models 2.1-3 amps short circuit current (hiccup) 1.5-2.3 amps ? all models are tested and speci? ed with a single, external, 0.47f, multi-layer ceramic output capacitor and no external input capacitors, unless otherwise noted. all models will effectively regulate under no-load conditions (with perhaps a slight increase in output ripple/noise). ? see technical notes/performance curves for additional explanations and details. ? input ripple current is tested/speci? ed over a 5-20mhz bandwidth with an external 33f input capacitor and a simulated source impedance of 220f and 12h. see i/o filtering, input ripple current and output noise for details. ? the on/off control is designed to be driven with open-collector (or equivalent) logic or the applica- tion of appropriate voltages (referenced to Cinput (pin 2)). applying a voltage to the on/off control pin when no input voltage is applied to the converter can cause permanent damage. see remote on/off control for more details. ? extreme accuracy refers to the accuracy of either trimmed or untrimmed output voltages over all normal operating ranges and combinations of input voltage, output load and temperature. ? tie the output trim pin (pin 9) to +output (pin 6) for maximum trim down or to Coutput (output return/common, pin 7) for maximum trim up. see output trimming for detailed trim equations. ? the current-limit-inception point is the output current level at which the converter's power-limiting circuitry drops the output voltage 2% from its initial value. see output current limiting and short-circuit protection for more details. ? for start-up-time speci? cations, output settling time is de? ned as the output voltage having reached 1% of its ? nal value at maximum load current. ? mtbfs are calculated using telcordia sr-332 method 1 case, ground ? xed, +25c ambient air and full-load conditions. contact mps for demonstrated life-test data. ? all models are fully operational and meet all published speci? cations, including "cold start," at C40c. use only as much output ? ltering as needed and no more . larger caps (especially low-esr ceramic types) may slow transient response or degrade dynamic performance. thoroughly test your system with all components installed.
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 6 of 16 www.murata-ps.com/support 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient typical performance curves 5(% 1%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 7 of 16 www.murata-ps.com/support 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% 1%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% 1%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 6 ). 6 0.49 0.99 1.49 1.99 2.49 3.00 3.50 4.00 4.50 5.00 5.50 6.00 65 69 73 77 81 85 89 93 uhe-5/6000-q12 efficiency vs. load @ +25 c ambient output current (amps) efficiency ( % ) v in = 9v v in = 36v v in = 12v v in = 24v 5(% 1%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 typical performance curves
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 8 of 16 www.murata-ps.com/support 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% $%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 typical performance curves
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 9 of 16 www.murata-ps.com/support /utput#iurrent!mps !mbient4emperature o # n 6 ). ,&- 6 ). ,&- 6 ). 34),,!)2 5(% $4emperature$erating /utput#iurrent!mps !mbient4emperature o # n 6 ). 34),,!)2 6 ). ,&- 6 ). 34),,!)2 6 ). ,&- 5(% $4emperature$erating 6 ). ,&- /utput#iurrent!mps !mbient4emperature o # n 6 ). ,&- 6 ). ,&- 6 ). 34),,!)2 5(% $and5(% $4emperature$erating /utput#iurrent!mps !mbient4emperature o # n 6 ). ,&- 6 ). ,&- 6 ). 34),,!)2 5(% $and5(% $4emperature$erating 5(% 1%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 5(% 1%fficiencyvs,oad ? #!mbient /utput#urrent!mps %fficiency 6 ). 6 6 ). 6 6 ). 6 typical performance curves
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 10 of 16 www.murata-ps.com/support /utput0ower7atts !mbient4emperature o # n 5(% $4emperature$erating 6 ). 34),,!)2 6 ). 34),,!)2 6 ). 34),,!)2 6 ). ,&- 6 ). ,&- /utput0ower7atts !mbient4emperature o # n 5(% 14emperature$erating 6 ). 34),,!)2 6 ). ,&- 6 ). 34),,!)2 6 ). ,&- 6 ). ,&- 6 ). ,&- output power (watts) ambient temperature ( o c) uhe-3.3/7500-q48 maximum current temperature derating (v in = 48v, airflow = 300 lfm) 300 lfm 40 50 60 70 80 90 100 0 1 2 3 4 5 6 7 8 output power (watts) ambient temperature ( o c) uhe-5/5000-q48 maximum current temperature derating (v in = 48v, airflow = 300 lfm) 300 lfm 0 1 2 3 4 5 6 40 50 60 70 80 90 100 /utput0ower7atts !mbient4emperature o # n 5(% 14emperature$erating 6 ). 34),,!)2 6 ). ,&- 6 ). 34),,!)2 6 ). ,&- 6 ). ,&- 6 ). ,&- /utput0ower7atts !mbient4emperature o # n 5(% $4emperature$erating .!452!,#/.6%#4)/. typical performance curves
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 11 of 16 www.murata-ps.com/support /utput0ower7atts !mbient4emperature o # n 5(% $4emperature$erating 6 ). 34),,!)2 6 ). 34),,!)2 6 ). 34),,!)2 6 ). ,&- 6 ). ,&- /utput0ower7atts !mbient4emperature o # n 5(% and5(% !ll-odels 4emperature$erating 6 ). 34),,!)2 $-odels/nly 6 ). 34),,!)2 6 ). 34),,!)2 6 ). 3till!irfor1-odels/nly typical performance curves
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 12 of 16 www.murata-ps.com/support technical notes input voltage: continuous: d12 models 23 volts d24/q12 models 42 volts d48/q48 models 81 volts transient (100msec): d12 models 25 volts d24/q12 models 50 volts d48/q48 models 100 volts on/off control (pin 4) max. voltages referenced to Cinput (pin 2) no suf? x +15 volts "n" suf? x +7 volts input reverse-polarity protection current must be <5 amps. brief duration only. fusing recommended. output current current limited. devices can withstand sustained output short circuits without damage. case temperature +100c storage temperature C55 to +125c lead temperature (soldering, 10 sec.) see soldering speci? cations these are stress ratings. exposure of devices to any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied. absolute maximum ratings input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. fuses should also be used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exists. for mpss uhe 12-30 watt dc/dc converters, you should use slow-blow type fuses, installed in the ungrounded input supply line, with values no greater than the following. model fuse values in amps output/input d12 q12 d24 q48 d48 1.2 v out 3 -- 2 -- 1 1.5 v out 4 -- 2 -- 1 1.8 v out 5 -- 2.5 -- 1 2.5 v out 5 -- 2.5 -- 1 3.3 v out -- 7.5 - 3 1.5 5 v out --5-32 12 v out 63352 15 v out 63352 all relevant national and international safety standards and regulations must be observed by the installer. for system safety agency approvals, the converters must be installed in compliance with the requirements of the end-use safety standard, e.g. iec/en/ul60950-1. input undervoltage shutdown and start-up threshold under normal start-up conditions, devices will not begin to regulate until the ramping-up input voltage exceeds the start-up threshold voltage. once operating, devices will not turn off until the input voltage drops below the undervoltage shutdown limit. subsequent re-start will not occur until the input is brought back up to the start-up threshold. this built in hysteresis prevents any unstable on/off situations from occurring at a single input voltage. start-up time the v in to v out start-up time is the interval of time between the point at which the ramping input voltage crosses the start-up threshold and the fully loaded output voltage enters and remains within its speci? ed accuracy band. actual measured times will vary with input source impedance, external input/output capacitance, and load. the uhe series implements a soft start circuit that limits the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. the on/off control to v out start-up time assumes the converter has its nominal input voltage applied but is turned off via the on/off control pin. the speci? cation de? nes the interval between the point at which the converter is turned on and the fully loaded output voltage enters and remains within its speci? ed accuracy band. similar to the v in to v out start-up, the on/off control to v out start-up time is also governed by the internal soft start circuitry and external load capacitance. the difference in start up time from v in to v out and from on/off control to v out is therefore insigni? cant. input overvoltage shutdown all d12/q12 and d24 models of the uhe dc/dc converters are equipped with input overvoltage protection. input voltages exceeding the input overvoltage shutdown speci? cation listed in the performance/functional speci? cations will cause the device to shutdown. a built-in hysteresis for all models will not allow the converter to restart until the input voltage is suf? ciently reduced. all 48v in models have this overvoltage shutdown function disabled because of requirements for withstanding brief input surges to 100v for up to 100sec without output voltage interruption. please contact mps to have input overvoltage shutdown for d48/q48 models enabled. input source impedance uhe converters must be driven from a low ac-impedance input source. the dc/dc's performance and stability can be compromised by the use of highly inductive source impedances. the input circuit shown in figure 2 is a practical solution that can be used to minimize the effects of inductance in the input traces. for optimum performance, components should be mounted close to the dc/dc converter. if the application has a high source impedance, low v in models can bene? t of increased external input capacitance. i/o filtering, input ripple current, and output noise all models in the uhe 12-30 watt dc/dc converters are tested/speci? ed for in- put re? ected ripple current and output noise using the speci? ed external input/ output components/circuits and layout as shown in the following two ? gures. external input capacitors (c in in figure 2) serve primarily as energy-storage elements, minimizing line voltage variations caused by transient ir drops
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 13 of 16 www.murata-ps.com/support c in v in c bus l bus c in = 33f, esr < 700m 7 @ 100khz c bus = 220f, esr < 100m 7 @ 100khz l bus = 12h +input Cinput current probe to oscilloscope + C c1 c1 = 0.47f c2 = na load 2-3 inches (51-76mm) from module c2 r load scope +output Coutput +sense Csense in critical applications, output ripple/noise (also referred to as periodic and random deviations or pard) may be reduced below speci? ed limits using ? lter- ing techniques, the simplest of which is the installation of additional external output capacitors. these output caps function as true ? lter elements and should be selected for bulk capacitance, low esr and appropriate frequency response. all external capacitors should have appropriate voltage ratings and be located as close to the converter as possible. temperature variations for all relevant parameters should also be taken carefully into consideration. the most effective combination of external i/o capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. our applications engineers can recommend potential solutions and discuss the possibility of our modifying a given device's internal ? ltering to meet your speci? c requirements. contact our applications engineering group for additional details. minimum output loading requirements uhe converters employ a synchronous-recti? er design topology and all models regulate within spec and are stable under no-load to full load conditions. operation under no-load conditions however might slightly increase the output ripple and noise. thermal shutdown these uhe converters are equipped with thermal-shutdown circuitry. if envi- ronmental conditions cause the internal temperature of the dc/dc converter to rise above the designed operating temperature, a precision temperature sensor will power down the unit. when the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. see performance/ functional speci? cations. output overvoltage protection uhe output voltages are monitored for an overvoltage condition via magnetic feedback. the signal is coupled to the primary side and if the output voltage rises to a level which could be damaging to the load, the sensing circuitry will power down the pwm controller causing the output voltages to decrease. fol- lowing a time-out period the pwm will restart, causing the output voltages to ramp to their appropriate values. if the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. this on/off cycling is referred to as "hiccup" mode. contact mps for an optional output overvoltage monitor circuit using a comparator which is optically coupled to the primary side thus allowing tighter and more precise control. current limiting (power limit with current mode control) as power demand increases on the output and enters the speci? ed limit inception range (current in voltage mode and power in current mode) limiting circuitry activates in the dc-dc converter to limit/restrict the maximum current or total power available. in voltage mode, current limit can have a constant or foldback characteristic. in current mode, once the current reaches a certain range the output voltage will start to decrease while the output current con- tinues to increase, thereby maintaining constant power, until a maximum peak current is reached and the converter enters a hiccup (on off cycling) mode of operation until the load is reduced below the threshold level, whereupon it will return to a normal mode of operation. current limit inception is de? ned as the point where the output voltage has decreased by a pre-speci? ed percentage (usually a 2% decrease from nominal). short circuit condition (current mode control) the short circuit condition is an extension of the current limiting condition. when the monitored peak current signal reaches a certain range, the pwm controllers outputs are shut off thereby turning the converter off. this is followed by an extended time out period. this period can vary depending on other conditions such as the input voltage level. following this time out period, the pwm controller will attempt to re-start the converter by initiating a normal start cycle which includes softstart. if the fault condition persists, another hiccup cycle is initiated. this cycle can and will continue inde? nitely until such time as the fault condition is removed, at which time the converter will resume normal operation. operating in the hiccup mode during a fault condition is advantageous in that average input and output power levels are held low preventing excessive internal increases in temperature. in conductors from backplane to the dc/dc. input caps should be selected for bulk capacitance (at appropriate frequencies), low esr, and high rms- ripple- current ratings. the switching nature of dc/dc converters requires that dc voltage sources have low ac impedance as highly inductive source imped- ance can affect system stability. in figure 2, c bus and l bus simulate a typical dc voltage bus. your speci? c system con? guration may necessitate additional considerations. floating outputs since these are isolated dc/dc converters, their outputs are "? oating" with respect to their input. designers will normally use the Coutput (pin 7) as the ground/return of the load circuit. you can, however, use the +output (pin 6) as ground/return to effectively reverse the output polarity. figure 2. measuring input ripple current figure 3. measuring output ripple/noise (pard)
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 14 of 16 www.murata-ps.com/support features and options on/off control the input-side, remote on/off control function (pin 4) can be ordered to operate with either logic type: standard models are equipped with positive-logic (no part-number suf? x) and these devices are enabled when pin 4 is left open (or is pulled high, applying to +15v with respect to Cinput, pin 2) as per figure 4. positive-logic devices are disabled when pin 4 is pulled low (0 to 0.8v with respect to Cinput). optional negative-logic devices ("n" suf? x) are off when pin 4 is left open (or pulled high, applying +3.5v to +15v), and on when pin 4 is pulled low (0 to 0.8v) with respect to Cv in as shown in figure 5. dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically iso- lated if appropriate). the drive circuit should be able to sink appropriate current (see performance specs) when activated and withstand appropriate voltage when deactivated. applying an external voltage to pin 4 when no input power is applied to the converter can cause permanent damage to the converter. trimming output voltage uhe converters have a trim capability (pin 9) that allows users to adjust the output voltages 5% of v out (10% for t models). adjustments to the output voltages can be accomplished via a trim pot (figure 6) or a single ? xed resistor as shown in figures 7 and 8. a single ? xed resistor can increase or decrease the output voltage depending on its connection. the resistor should be located close to the converter and have a tcr less than 100ppm/c to minimize sensitivity to changes in temperature. if the trim function is not used, leave the trim pin ? oating. a single resistor connected from the trim (pin 9) to the +output (pin 6), or +sense where applicable, will decrease the output voltage for all models with the exception of the 1.2v models, which will increase the output voltage in this con? guration. a resistor connected from the trim (pin 9) to the Coutput (pin 7), or Csense where applicable, will increase the output voltage for all models with the exception of the 1.2v models, which will decrease the output voltage in this con? guration. soldering guidelines murata power solutions recommends the speci? cations below when installing these converters. these speci? cations vary depending on the solder type. exceeding these speci? cations may cause damage to the product. be cautious when there is high atmo- spheric humidity. your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. wave solder operations for through-hole mounted products (thmt) for sn/ag/cu based solders: maximum preheat temperature 115 c. maximum pot temperature 270 c. maximum solder dwell time 7 seconds for sn/pb based solders: maximum preheat temperature 105 c. maximum pot temperature 250 c. maximum solder dwell time 6 seconds 4 2 1 +input 13v circuit 5v circuit Cinput on/off control figure 4. driving the positive logic on/off control pin 4 2 1 +input +v cc Cinput on/off control figure 5. driving the negative logic on/off control pin load +output Cinput +input on/off control trim +sense Coutput Csense 7 8 2 1 9 6 5 4 20k 7 5-22 turns figure 6. trim connections using a trimpot load r1 +output Cinput +input on/off control trim +sense Coutput Csense 7 8 2 1 9 6 5 4 figure 7. trim connections to decrease output voltages using a fixed resistor (for all models except 1.2v models which will increase v out ) load r2 +output Cinput +input on/off control trim +sense Coutput Csense 7 8 2 1 9 6 5 4 figure 8. trim connections to increase output voltages (for all models except 1.2v models which will decrease v out )
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 15 of 16 www.murata-ps.com/support C 3.169 0.3232 uhe-1.5/10000-d12, -d24, -d48 uhe-1.8/10000-d12, -d24, -d48 uhe-2.5/10000-d12, -d24, -d48 uhe-3.3/7500-q12, -q24, -d48 v o C 1.5 r2 (k 7 ) = r1 (k 7 ) = C 3.169 0.459(v o C 0.7096) 1.5 C v o 1.2 C v o C 7.596 0.9647 v o C 1.8 r2 (k 7 ) = r1 (k 7 ) = C 7.596 1.027(v o C 0.9352) 1.8 C v o C 7.503 2.142 v o C 2.5 r2 (k 7 ) = r1 (k 7 ) = C 7.503 2.226(v o C 0.9625) 2.5 C v o uhe-12/2500-d12, -d24, -d48, -q12, -q48 C 34.8 29.5 v o C 12 r2 (k 7 ) = r1 (k 7 ) = C 34.8 10(v o C 2.5) 12 C v o uhe-15/2000-d12, -d24, -d48 C 38.3 37.875 v o C 15 r2 (k 7 ) = r1 (k 7 ) = C 38.3 13.3(v o C 2.5) 15 C v o C 34.8 37.875 v o C 15 r2 (k 7 ) = r1 (k 7 ) = C 34.8 13.3(v o C 2.5) 15 C v o C 22.42 5.65 v o C 3.3 r2 (k 7 ) = r1 (k 7 ) = C 22.42 3.21(v o C 1.759) 3.3 C v o uhe-5/5000-q12, -q48, uhe-5/6000-d48, -q48 C 15.52 5.58 v o C 5 r2 (k 7 ) = r1 (k 7 ) = C 15.52 2.15(v o C 2.592) 5 C v o v o C 1.2 r1 (k 7 ) = r2 (k 7 ) = C 1.413 0.4432(v o C 0.397) C 1.413 0.397 uhe-1.2/10000-d12, -d24, -d48 trim up trim up trim down trim down uhe-3.3/7500-d48t (quantity order only) uhe-5/6000-q48t, -d48t (quantity order only) uhe-15/2000-q12, -q48 r2 (k ) = 1.55/2y where y = (v o C 3.3)/3.3 r1 (k ) = (2.54/y C 4.08)/2 where y = (3.3 C v o )/3.3 r1 (k ) = 1.25/y C 2.69 where y = (5 C v o )/5 r2 (k ) = 1.25/y where y = (v o C 5)/5 load +output Cinput sense current contact and pcb resistance losses due to ir drops contact and pcb resistance losses due to ir drops sense return +input on/off control trim +sense Coutput Csense 7 8 2 1 9 5 i out return i out 6 4 figure 9. remote sense circuit con? guration trim adjustments greater than the speci? ed 5% can have an adverse affect on the converter's performance and are not recommended. excessive voltage differences between v out and sense, in conjunction with trim adjustment of the output voltage, can cause the overvoltage protection circuitry to activate (see performance speci? cations for overvoltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the converter's speci? ed rating or cause output voltages to climb into the output overvoltage region. therefore: (v out at pins) x (i out ) < = rated output power note: resistor values are in k. adjustment accuracy is subject to resistor tolerances and factory-adjusted output accuracy. v o = desired output voltage. remote sense (optional on 1.2-5v out models) note: the sense and v out lines are internally connected through 10 : resis- tors. nevertheless, if the sense function is not used for remote regulation the user should connect the +sense to +v out and Csense to Cv out at the dc/dc converter pins. uhe series converters have a sense feature to provide point of use regulation, thereby overcoming moderate ir drops in pcb conductors or cabling. the remote sense lines carry very little current and therefore require minimal cross-sectional- area conductors. the sense lines are used by the feedback control-loop to regu- late the output. as such, they are not low impedance points and must be treated with care in layouts and cabling. sense lines on a pcb should be run adjacent to dc signals, preferably ground. in cables and discrete wiring applications, twisted pair or other techniques should be implemented. uhe series converters will compensate for drops between the output voltage at the dc/dc and the sense voltage at the dc/dc provided that: [v out (+) Cv out (C)] C[sense(+) Csense (C)] d 5% v out output overvoltage protection is monitored at the output voltage pin, not the sense pin. therefore, excessive voltage differences between v out and sense in conjunction with trim adjustment of the output voltage can cause the overvoltage protection circuitry to activate (see performance speci? cations for overvoltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense functions can cause output voltages to increase thereby increasing output power beyond the uhes speci? ed rating or cause output voltages to climb into the output overvoltage region. therefore, the designer must ensure: (v out at pins) (i out ) d rated output power trim equations
uhe series isolated, high ef? ciency, 1.6" 2" 2-10 amp, 12-30 watt dc/dc converters mdc_uhe_12-30w series.c01 page 16 of 16 www.murata-ps.com/support murata power solutions, inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. the descriptions contained her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are subject to cha nge without notice. ? 2012 murata power solutions, inc. murata power solutions, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered this product is subject to the following operating requirements and the life and safety critical application sales policy : refer to: http://www.murata-ps.com/requirements/ figure 10. vertical wind tunnel ir video camera ir transparent optical window variable speed fan heating element ambient temperature sensor air?ow collimator precision low-rate anemometer 3 below uut unit under test (uut) vertical wind tunnel murata power solutions employs a computer controlled custom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate air? ow and heat dissipation analysis of power products. the system includes a precision low ? ow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges, and adjustable heating element. the ir camera monitors the thermal performance of the unit under test (uut) under static steady-state conditions. a special optical port is used which is transparent to infrared wavelengths. both through-hole and surface mount converters are soldered down to a host carrier board for realistic heat absorption and spreading. both longitudinal and transverse air? ow studies are possible by rotation of this carrier board since there are often signi? cant differences in the heat dissipation in the two air? ow directions. the combination of adjustable air? ow, adjustable ambient heat, and adjustable input/output currents and voltages mean that a very wide range of measurement conditions can be studied. the collimator reduces the amount of turbulence adjacent to the uut by minimizing air? ow turbulence. such turbu- lence in? uences the effective heat transfer characteristics and gives false readings. excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. both sides of the uut are studied since there are different thermal gradients on each side. the adjustable heating element and fan, built-in temperature gauges, and no-contact ir camera mean that power supplies are tested in real-world conditions.

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