nme 24v & 48v series isolated 1w single output dc/dc converters kdc_nme2.e02 page 1 of 4 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 ef?ciency isolation capacitance mttf 1 package style v v ma % pf khrs nme2405dc 24 5 200 70 40 201 dip nme2409dc 24 9 111 75 59 185 nme2412dc 24 12 83 80 78 163 nme2415dc 24 15 66 80 79 136 NME2405SC 24 5 200 70 40 201 sip nme2409sc 24 9 111 75 59 185 nme2412sc 24 12 83 80 78 163 nme2415sc 24 15 66 80 79 136 obsolete recommended alternative nme4805dc 48 5 200 70 32 213 dip mer1s4805sc nme4809dc 48 9 111 75 50 194 dip mer1s4809sc nme4812dc 48 12 83 80 76 164 dip mer1s4812sc nme4815dc 48 15 66 80 75 140 dip mer1s4815sc nme4805sc 48 5 200 70 32 213 sip mer1s4805sc nme4809sc 48 9 111 75 50 194 sip mer1s4809sc nme4812sc 48 12 83 80 76 164 sip mer1s4812sc nme4815sc 48 15 66 80 75 140 sip mer1s4815sc when operated with additional external load capacitance the rise time of the input voltage will determine the maximum external capacitance value for guaranteed start up. the slower the rise time of the input voltage the greater the maximum value of the additional external capacitance for reliable start up. description the nme 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. features ? rohs compliant ? single isolated output ? 1kvdc isolation ? ef?ciency up to 80% ? power density 1.45w/cm 3 ? ul 94v-0 package material ? footprint from 0.69cm 2 ? industry standard pinout ? 24v & 48v input ? 5v, 9v, 12v and 15v output ? no heatsink required ? internal smd construction ? fully encapsulated with toroidal magnetics ? no external components required ? custom solutions available input characteristics parameter conditions min. typ. max. units voltage range continuous operation, 24v input types 21.6 24 26.4 v continuous operation, 48v input types 43.2 48 52.8 absolute maximum ratings short-circuit protection 3 1 second lead temperature 1.5mm from case for 10 seconds 300c input voltage v in , nme24 types 28v input voltage v in , nme48 types 54v 1. calculated using mil-hdbk-217f with nominal input voltage at full load. 2. see derating curve. 3. supply voltage must be disconnected at the end of the short circuit duration. all speci?cations typical at t a =25c, nominal input voltage and rated output current unless otherwise speci?ed. output characteristics parameter conditions min. typ. max. units rated power 2 t a =0c to 70c 1.0 w voltage set point accuracy see tolerance envelope line regulation high v in to low v in 1.2 %/% load regulation 2 10% load to rated load, 5v output types 15 % 10% load to rated load, all other output types 10 ripple and noise bw=dc to 20mhz, all output types 150 mv p-p
nme 24v & 48v series isolated 1w single output dc/dc converters kdc_nme2.e02 page 2 of 4 www.murata-ps.com/support general characteristics parameter conditions min. typ. max. units switching frequency all types 100 khz isolation characteristics parameter conditions min. typ. max. units isolation test voltage flash tested for 1 second 1000 vdc resistance viso= 500vdc 1 g temperature characteristics parameter conditions min. typ. max. units speci?cation all output types 0 70 c storage -55 150 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 nme 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 nme 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 nme 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 0 0.5 1.0 1.5 safe operating area ambient temperature (c) output power (w) 70c 125c
nme 24v & 48v series isolated 1w single output dc/dc converters kdc_nme2.e02 page 3 of 4 www.murata-ps.com/support package specifications mechanical dimensions pin connections - 8 pin dip pin function 1-v in 4+v in 5+v out 7-v out pin connections - 4 pin sip pin function 1-v in 2+v in 3-v out 4+v out 0.45 (11.48) 0.236 (6.00)** 0.0118 (0.30) 0.0078 (0.20) 0.074 (1.89) 0.109 (2.77) 0.3 (7.62) 0.049 (1.25) 0.393 (10.0) 0.022 (0.55) 0.018 (0.45) 0.181 (4.60) 0.142 (3.60) 0.022 (0.55) 0.018 (0.45) xyyww NME2405SC 0.267 (6.80)* 0.181 (4.60) 0.142 (3.60) 0.022 (0.55) 0.018 (0.45) 0.453 (11.50) 0.386 (9.80) xyyww nme2405dc 0.0118 (0.30) 0.0078 (0.20) 0.043 (1.09) 0.0763 (1.94) 0.3 (7.62) 0.3 (7.62) 0.2 (5.08) 14 5 7 1234 * 0.303 (7.70) for 48v variants ** 0.3 (7.50) for 48v variants 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: 1.48g (dip) 1.30g (sip) dip package sip package
nme 24v & 48v series isolated 1w single output dc/dc converters kdc_nme2.e02 page 4 of 4 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. ? 2013 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 (continued) recommended footprint details tube outline dimensions rohs compliance information this series is compatible with rohs soldering systems with a peak wave solder temperature of 300c for 10 seconds. the pin term ination ?nish on the sip package type is tin plate, hot dipped over matte tin with nickel preplate. the dip types are matte tin over nickel p replate. both types in this series are backward compatible with sn/pb soldering systems. for further information, please visit www.murata-ps.com/rohs 8 pin dip tube 4 pin sip tube 8 pin dip package 4 pin sip package
) 0 - & 4 ? tube quantity : 35 unless otherwise stated all dimensions in inches (mm) 0.5mm. tube length (8 pin dip) : 20.47 (520mm 2mm). tube length (4 pin sip) : 20.47 (520mm 2mm).
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) 0 - & 4
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