nml series isolated 2w single output dc/dc converters kdc_nml.e02 page 1 of 5 www.murata-ps.com www.murata-ps.com/support for full details go to www.murata-ps.com/rohs $ selection guide order code nominal input voltage output voltage output current input current at rated load ef?ciency isolation capacitance mttf 1 v v ma ma % pf khrs nml0505sc 5 5 400 513 78 19 2327 nml0509sc 5 9 222 492 81 27 1393 nml0512sc 5 12 167 479 84 32 832 NML0515SC 5 15 133 481 83 27 481 nml1205sc 12 5 400 207 81 28 716 nml1209sc 12 9 222 198 84 42 593 nml1212sc 12 12 167 197 85 46 461 nml1215sc 12 15 133 197 85 54 328 input characteristics parameter conditions min. typ. max. units voltage range continuous operation, 5v input types 4.5 5.0 5.5 v continuous operation, 12v input types 10.8 12.0 13.2 re?ected ripple current 5v input types 33 ma p-p 12v input types 38 output characteristics parameter conditions min. typ. max. units rated power t a =-40c to 85c 2.0 w voltage set point accuracy see tolerance envelope line regulation high v in to low v in 1.0 1.2 %/% load regulation 2 10% load to rated load, 5v output types 7.0 8.5 % 10% load to rated load, 9v output types 4.5 5.2 10% load to rated load, 12v output types 4.5 5.5 10% load to rated load, 15v output types 3.7 8.5 ripple and noise nml0505sc, bw=dc to 20mhz 96 200 mv p-p nml0509sc, bw=dc to 20mhz 67 nml0512sc, bw=dc to 20mhz 59 NML0515SC, bw=dc to 20mhz 53 nml1205sc, bw=dc to 20mhz 76 nml1209sc, bw=dc to 20mhz 63 nml1212sc, bw=dc to 20mhz 53 nml1215sc, bw=dc to 20mhz 45 isolation characteristics parameter conditions min. typ. max. units isolation test voltage flash tested for 1 second 1000 vdc resistance viso= 500vdc 10 g absolute maximum ratings lead temperature 1.5mm from case for 10 seconds 300c internal power dissipation 805mw input voltage v in , nml05 types 7v input voltage v in , nml12 types 15v 1. calculated using mil-hdbk-217f with nominal input voltage at full load. all speci?cations typical at t a =25c, nominal input voltage and rated output current unless otherwise speci?ed. features ? rohs compliant ? single isolated output ? 1kvdc isolation ? ef?ciency up to 85% ? wide temperature performance at full 2 watt load, C40c to 85c ? power density 2.01w/cm 3 ? ul 94v-0 package material ? footprint from 1.05cm 2 ? industry standard pinout ? 5v & 12v input ? 5v, 9v, 12v and 15v output ? no heatsink required ? internal smd construction ? fully encapsulated with toroidal magnetics ? no external components required ? mttf up to 2.3 million hours ? custom solutions available ? pin compatible with lme & nme series ? no electrolytic or tantalum capacitors description the nml series of dc/dc converters is particularly suited to isolating and/or converting dc power rails. the galvanic isolation allows the device to be con?gured to provide an isolated negative rail in systems where only positive rails exist. the wide temperature range guarantees startup from C40c and full 2 watt output at 85c. pin compatibility with the nme and lme ensures ease of upgradeability.
nml series isolated 2w single output dc/dc converters kdc_nml.e02 page 2 of 5 www.murata-ps.com/support general characteristics parameter conditions min. typ. max. units switching frequency 5v input types 90 khz 12v input types 90 temperature characteristics parameter conditions min. typ. max. units speci?cation all output types -40 85 c storage -50 130 case temperature above ambient 5v output types 45 all other output types 36 cooling free air convection temperature derating graph tolerance envelope +10% output load current (%) output voltage +5% -7.5% -2.5% +2.5% typical load line v nom 100 75 50 25 10 technical notes isolation voltage hi pot test, flash tested, withstand voltage, proof voltage, dielectric withstand voltage & isolation test voltage are all terms that relate to the same thing, a test voltage, applied for a speci?ed time, across a component designed to provide electrical isolation, to verify the integrity of that isola tion. murata power solutions nml series of dc/dc converters are all 100% production tested at their stated isolation voltage. this is 1kvdc for 1 second. a question commonly asked is, what is the continuous voltage that can be applied across the part in normal operation? for a part holding no speci?c agency approvals, such as the nml series, both input and output should normally be maintained wit hin selv limits i.e. less than 42.4v peak, or 60vdc. the isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as a n element of a safety isolation system. the part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; bu t then the circuitry on both sides of the barrier must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circui ts and any user-accessible circuitry according to safety standard requirements. repeated high-voltage isolation testing it is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials, construction and environment. the nml series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. while parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insu lation. any material, including this enamel (typically polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. we therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage b e reduced by 20% from speci?ed test voltage. this consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further insulation system of physical spacing or barriers. 150 100 50 0 -40 0 1 2 3 safe operating area 85c ambient temperature (c) output power (w) the voltage tolerance envelope shows typical load regulation characteristics for this product series. the tolerance envelope is the maximum output voltage variation due to changes in output loading.
nml series isolated 2w single output dc/dc converters kdc_nml.e02 page 3 of 5 www.murata-ps.com/support application notes minimum load the minimum load to meet datasheet speci?cation is 10% of the full rated load across the speci?ed input voltage range. lower th an 10% minimum loading will result in an increase in output voltage, which may rise to typically double the speci?ed output voltage if the output load falls to less than 5%. capacitive loading and start up typical start up times for this series, with a typical input voltage rise time of 2.2s and output capacitance of 10f, are sho wn in the table below. the product series will start into a capacitance of 47f with an increased start time, however, the maximum recommended output capacitance is 10f. ripple & noise characterisation method ripple and noise measurements are performed with the following test con?guration. c1 1f x7r m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the dc/dc converter c2 10f tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the dc/dc converter with an esr of l ess than 100m at 100 khz c3 100nf multilayer ceramic capacitor, general purpose r1 450 resistor, carbon ?lm, 1% tolerance r2 50 bnc termination t1 3t of the coax cable through a ferrite toroid rload resistive load to the maximum power rating of the dc/dc converter. connections should be made via twisted wires measured values are multiplied by 10 to obtain the speci?ed values. differential mode noise test schematic oscilloscope y input supply c1 c2 c3 r1 t1 r2 input output dc/dc converter r load + + - - typical start-up wave form start-up time s nml0505sc 790 nml0509sc 1154 nml0512sc 2265 NML0515SC 2998 nml1205sc 396 nml1209sc 880 nml1212sc 1156 nml1215sc 2394
nml series isolated 2w single output dc/dc converters kdc_nml.e02 page 4 of 5 www.murata-ps.com/support application notes (continued) output ripple reduction by using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mv p-p max. component selection capacitor: it is required that the esr (equivalent series resistance) should be as low as possible, ceramic types are recommend ed. the voltage rating should be at least twice (except for 15v output), the rated output voltage of the dc/dc converter. inductor: the rated current of the inductor should not be less than that of the output of the dc/dc converter. at the rated cur rent, the dc resistance of the inductor should be such that the voltage drop across the inductor is <2% of the rated voltage of the dc/dc converter. the srf (self reso nant frequency) should be >20mhz. dc dc l c load power source inductor capacitor l, h smd through hole c, f nml0505sc 22 82223 11r223c 2.2uf nml0509sc 47 82473 11r473c 1uf nml0512sc 47 82473 11r473c 2.2uf NML0515SC 68 82683 11r683c 3.3uf nml1205sc 22 82223 11r223c 2.2uf nml1209sc 47 82473 11r473c 1uf nml1212sc 47 82473 11r473c 2.2uf nml1215sc 68 82683 11r683c 3.3uf
nml series isolated 2w single output dc/dc converters kdc_nml.e02 page 5 of 5 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 chan ge 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/ package specifications mechanical dimensions pin connections - 4 pin sip pin function 1-v in 2+v in 3-v out 4+v out tube outline dimensions recommended footprint details 0.55 (14.00) 0.295 (7.50) 0.394 (10.00) 0.181 (4.60) 0.142 (3.60) 0.0118 (0.30) 0.0079 (0.20) 0.022 (0.50) 0.018 (0.45) 0.133 (3.38) 0.3 (7.62) 0.049 (1.25) 0.022 (0.50) 0.018 (0.45) xyywwi nml0505s all dimensions in inches 0.01 (mm 0.25mm). all pins on a 0.1 (2.54) pitch and within 0.01 (0.25) of true position. weight: 2.0g sip package 2.54 (0.1) 2.54 (0.1) 1.15 (0.0453) 1.00 (0.0394) ? 0.1 (0.00394) 4 holes tube quantity : 35 unless otherwise stated all dimensions in inches (mm) 0.5mm.
unless otherwise stated all dimensions in inches (mm) 0.5mm. tube length : 20.47 (520mm 2mm). rohs compliance information this series is compatible with rohs soldering systems with a peak wave solder temperature of 300oc for 10 seconds. the pin termination ?nish on this product series is tin plate, hot dipped over matte tin with nickel preplate. the series is backward compatible with sn/pb soldering systems. for further information, please visit www.murata-ps.com/rohs
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