nma 24v & 48v series isolated 1w dual output dc/dc converters kdc_nmac2.g01 page 1 of 4 all enquiries: www.murata-ps.com/support www.murata-ps.com for full details go to www.murata-ps.com/rohs $ www.murata-ps.com selection guide order code nominal input voltage output voltage output current ef? ciency isolation capacitance mttf 1 package style recommended alternatives (click for data sheet) v v ma % pf khrs not recommended for new designs: nma2405sc 24 5 100 70 39 194 sip mea1d2405sc nma2409sc 24 9 55 77 85 129 mea1d2409sc NMA2412SC 24 12 42 80 65 134 mea1d2412sc nma2415sc 24 15 33 80 95 101 mea1d2415sc obsolete: nma2405dc 24 5 100 70 39 194 dip mea1d2405dc nma2409dc 24 9 55 77 85 129 mea1d2409dc nma2412dc 24 12 42 80 65 134 mea1d2412dc nma2415dc 24 15 33 80 95 101 mea1d2415dc nma4805dc 48 5 100 70 26 206 mea1d4805dc nma4809dc 48 9 55 80 38 174 mea1d4809dc nma4812dc 48 12 42 80 52 139 mea1d4812dc nma4815dc 48 15 33 80 56 104 mea1d4815dc nma4805sc 48 5 100 70 26 206 sip mea1d4805sc nma4809sc 48 9 55 80 38 174 mea1d4809sc nma4812sc 48 12 42 80 52 139 mea1d4812sc nma4815sc 48 15 33 80 56 104 mea1d4815sc 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. 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 output characteristics parameter conditions min. typ. max. units rated power 2 t a =0 c to 70 c 1w voltage set point accuracy see tolerance envelope line regulation high v in to low v in 1.2 %/% load regulation 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 input types 150 mv p-p absolute maximum ratings short-circuit protection 3 1 second lead temperature 1.5mm from case for 10 seconds 300c internal power dissipation 450mw input voltage v in , nma24 types 28v input voltage v in, nma48 types 54v 1. calculated using mil-hdbk-217f with nominal input voltage at full load. 2. see derating graph. 3. supply voltage must be discontinued 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. features rohs compliant ef? ciency up to 80% power density up to 0.85w/cm 3 dual output from a single input rail ul 94v-0 package material no heatsink required footprint from 1.17cm 2 industry standard pinout power sharing on output 1kvdc isolation 24v & 48v input 5v, 9v, 12v and 15v output internal smd construction fully encapsulated with toroidal magnetics no external components required description the nma series of dc/dc converters are the standard buliding blocks for on-board distrib- uted power systems. they are ideally suited for providing dual rail supplies on primarily digital boards with the added bene? t of galvanic isolation to reduce switching noise. all of the rated power may be drawn from a single pin provided the total load does not exceed 1 watt. a w s not recommended for new designs s
nma 24v & 48v series isolated 1w dual output dc/dc converters kdc_nmac2.g01 page 2 of 4 all enquiries: www.murata-ps.com/support www.murata-ps.com general characteristics parameter conditions min. typ. max. units switching frequency all input types 100 khz isolation characteristics parameter conditions min. typ. max. units isolation test voltage flash tested for 1 second 1000 vdc resistance viso= 500vdc 10 g temperature characteristics parameter conditions min. typ. max. units speci? cation all output types 0 70 c storage -55 150 cooling free air convection 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 isol ation. murata power solutions nma 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 nma series, both input and output should normally be maintained wi thin 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 nma 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. temperature derating graph 150 100 50 0 0 0.5 1.0 1.5 safe operating area ambient temperature (oc) output power (w) 70c 125oc
nma 24v & 48v series isolated 1w dual output dc/dc converters kdc_nmac2.g01 page 3 of 4 all enquiries: www.murata-ps.com/support www.murata-ps.com package specifications mechanical dimensions pin connections - 14 pin dip pin function 1-v in 7nc 8ov 9+v out 11 -v out 14 +v in pin connections - 7 pin sip pin function 1+v in 2-v in 4-v out 5ov 6+v out 0.77 (19.50) 0.385 (9.80) 0.268 (6.80)* 0.181 (4.60) 0.142 (3.60) 0.022 (0.55) 0.0178 (0.45) 0.6 (15.24) 0.084 (2.13) 0.3 (7.62) 0.0118 (0.30) 0.0079 (0.20) 0.043 (1.09) 0.1 (2.54) 1 7 14 11 9 8 xyywwi nma2405dc weight: 2.4g (24v dip) 2.9g (48v dip) 2.2g (24v sip) 2.9g (48v sip) dip package sip package 0.77 (19.50) 0.236 (6.00)** 0.394 (10.00) 0.181 (4.60) 0.141 (3.60) 0.0118 (0.30) 0.0079 (0.20) 0.5 (12.70) 0.05 (1.25) 0.079 (2.00) 0.022 (0.55) 0.0178 (0.45) 0.1 (2.54) 0.22 (0.55) 0.0178 (0.45) nma2405sc xyywwi 1 2 4 5 6 * 0.303 (7.70) for 48v variants ** 0.295 (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. 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 n ickel preplate. both types in this series are backward compatible with sn/pb soldering systems. for further information, please visit www.murata-ps.com/rohs
nma 24v & 48v series isolated 1w dual output dc/dc converters kdc_nmac2.g01 page 4 of 4 all enquiries: 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. ? 2011 murata power solutions, inc. murata power solutions, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered www.murata-ps.com/locations package specifications (continued) recommended footprint details tube outline dimensions
unless otherwise stated all dimensions in inches (mm) 0.5mm. tube length (14 pin dip) : 20.47 (520mm 2mm). tube length (7 pin sip) : 20.47 (520mm 2mm). 14 pin dip tube 7 pin sip tube 14 pin dip package 7 pin sip package tube quantity : 25
0.1 (2.54) 0.045 (1.15) 0.039 (1.00) ? 0.1 (2.54) 0.045 (1.15) 0.039 (1.00) ? 0.1 (2.54) 0.1 (2.54) 5 holes 0.00394 (0.1) 5 holes 0.00394 (0.1
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