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cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 1 of 11 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 load regulation ripple & noise 3 input current at rated load ef?ciency isolation capacitance mttf 1 vvma % mv p-p ma % pf mil. tel. typ. max typ. max. min. typ. khrs cmr100c 5 5 150 9 11 6 10 218 65 69 30 1850 cmr118c 24 5 150 6.8 10 8 15 46 65 70 60 1250 3kvdc isolation options CMR0505SA3C 5 5 150 9 11 15 25 220 64 68 30 4240 cmr0512s3c 5 12 31 5 6 6.7 8 192 74 78 30 1560 cmr0515s3c 5 15 25 4 6 6.3 8.2 188 76 79 30 1060 cmr1215s3c 12 15 25 3 4.5 6.5 13 80 76 79 40 925 short circuit protection options cmr100pc 5 5 150 7.5 9 10 25 200 73 75.5 22 3095 61060 cmr0505sap3c 4 5 5 150 7.5 9 20 40 195 74 76 20 2680 56444 input characteristics parameter conditions min. typ. max. units voltage range continuous operation, 5v input types 4.5 5 5.5 v continuous operation, 12v input types 10.8 12 13.2 continuous operation, 24v input types 21.6 24 26.4 input short circuit current short circuit variants 95 ma input re?ected ripple current cmr100pc 2 15 ma p-p cmr0505sap3c 5 15 5v & 12v input types 2.6 4 24v input types 10 15 output characteristics parameter conditions min. typ. max. units rated power 2 t a =-40c to 85c 0.75 w voltage set point accuracy see tolerance envelope line regulation high v in to low v in ; short circuit types 1.15 1.2 %/% high v in to low v in ; all other output types 1.0 1.2 isolation characteristics parameter conditions min. typ. max. units isolation voltage c versions ?ash tested for 1 second 1000 vdc 3c versions ?ash tested for 1 minute 3000 resistance viso=1000vdc 10 g absolute maximum ratings lead temperature 1.5mm from case for 10 seconds 260c 5v input types 7v 12v input types 15v 24v input types 28v 1. calculated using mil-hdbk-217 fn2 and telcordia sr-332 calculation model with nominal input voltage at full load. 2. see derating graph. 3. see ripple & noise characterisation method. 4. 3kvdc isolation all speci?cations typical at t a =25c, nominal input voltage and rated output current unless otherwise speci?ed. features ? short circuit protection options ? ul 60950 recognised ? single or dual isolated outputs ? 1kvdc or 3kvdc options hi pot test ? wide temperature performance at full ? 0.75w load -40c to 85c ? industry standard pinouts ? 5v, 12v and 24v inputs ? 5v, 12v and 15v outputs ? pin compatible with nmr, mer1, mmv, mev1, nmk, mev3, nmv series. description the cmr series are a cost effective 0.75w dc/dc converter series, in an industry standard package with industry standard pinouts, popular input and output voltages are available as a lower power alternative to a 1w dc/dc converter. 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 0.75 watt output at 85c. for the short circuit protected parts (pc) protection is continuous and auto-resetting on removal of the short circuit.
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 2 of 11 www.murata-ps.com/support general characteristics parameter conditions min. typ. max. units switching frequency 5v input types 110 khz 12v input types 120 24v input types 80 cmr100pc 97 cmr0505sap3c 88 temperature characteristics parameter conditions min. typ. max. units speci?cation all output types -40 85 c storage -50 125 case temperature above ambient 5v output types 33 all other output types 28 1kvdc short circuit types 18 3kvdc short circuit types 19 cooling free air convection tolerance envelopes +10% output load current (%) output voltage -4% +4% v nom 100 75 50 25 10 +8% output load current (%) output voltage -3% +3% v nom 100 75 50 25 10 +2% all 5v output types: all other output types: 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. +2% +10% output load current (%) output voltage -3% +2% +5% 100 75 50 25 10 short circuit types: v nom
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 3 of 11 www.murata-ps.com/support 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 cmr series of dc/dc converters are all 100% production tested at their stated isolation voltage. this is 1kvdc for 1 second for c versions and 3kvdc for 1 minute for 3c versions. a question commonly asked is, what is the continuous voltage that can be applied across the part in normal operation? the cmr is recognised by underwriters laboratory for functional insulation, both input and output should normally be maintained within 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 cmr 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. rohs compliance information this series is compatible with rohs soldering systems with a peak wave solder temperature of 260oc for 10 seconds. the pin term ination ?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 safety approval ul60950 the cmr is recognised by underwriters laboratory (ul) to ul 60950 for functional insulation. the cmr100c and cmr118c in a maxim um still air ambient temperature of 100c as measured at any point on the case of the unit (hotspot). fusing the cmr series of converters are not internally fused so to meet the requirements of ul an anti-surge input line fuse should al ways be used with ratings as de?ned below. cmr100xc: 0.5a cmr118c: 0.12a cmr05xxxx3c: 0.315a cmr12xxxx3c: 1a all fuses should be ul recognized and rated to 125v. file number e151252 applies. temperature derating graphs 150 100 50 0 -40 0 0.75 safe operating area 85c ambient temperature (c) output power (w) 150 100 50 0 -40 0 0.75 safe operating area 85c ambient temperature (c) output power (w) 120c short circuit types only. all other types.
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 4 of 11 www.murata-ps.com/support efficiency vs load cmr100c cmr118c CMR0505SA3C cmr0512s3c cmr0515s3c cmr1215s3c
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 5 of 11 www.murata-ps.com/support efficiency vs load cmr100pc cmr0505sap3c 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100110 efficiency (%) load (%) 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100110 efficiency (%) load (%)
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 6 of 11 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 cmr100c 2300 cmr118c 670 CMR0505SA3C 1970 cmr0512s3c 11200 cmr0515s3c 16300 cmr1215s3c 11200 cmr100pc 360 cmr0505sap3c 370
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 7 of 11 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 cmr100c 10 82103c 11r103c 4.7 cmr118c 10 82103c 11r103c 4.7 CMR0505SA3C 22 82223c 11r223c 1 cmr0512s3c 150 82154c 11r154c 0.33 cmr0515s3c 220 82224c 11r224c 0.33 cmr1215s3c 220 82224c 11r224c 0.22 cmr100pc 22 82223c 11r223c 1 cmr0505sap3c 22 82223c 11r223c 1
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 8 of 11 www.murata-ps.com/support emc filtering and spectra filtering the following ?lter circuit and ?lter table shows the input ?lters typically required to meet en 55022 curve b, quasi-peak emc limit, as shown in the following plots. the following plots show positive and negative quasi peak and cispr22 average limit b (pink line) and quasi peak limit b (green lin e) adherence limits. inductor capacitor part number l, h smd through hole c, f cmr100c cmr118c CMR0505SA3C cmr0512s3c cmr0515s3c cmr1215s3c cmr100pc 22 82223c 11r223c 1 cmr0505sap3c cmr100c cmr118c CMR0505SA3C cmr0512s3c dc dc c l c ceramic capacitor
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 9 of 11 www.murata-ps.com/support emc filtering and spectra cmr0515s3c cmr1215s3c cmr100pc cmr0505sap3c 0 10 20 30 40 50 60 70 80 1.00e+05 1.00e+06 1.00e+07 1.00e+08 dbuv frequency (hz)
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 10 of 11 www.murata-ps.com/support package specifications mechanical dimensions tube outline dimensions 5.0 [0.197] 12.43 [0.489] 18.0 [0.709] 9.3 [0.366] tube length : 520mm [20.472] 2.0 [0.079]. unless otherwise speci?ed all dimensions in mm [inches] 0.55mm [0.022]. tube quantity: 25 c package 19.500.25 [0.7680.010] 10.000.25 [0.3940.010] 4.100.5 [0.1610.020] (1.13 [0.044]) (1.93 [0.076]) 6.000.25 [0.2360.010] 5.08 [0.200] 0.500.05 [0.0200.002] 0.250.05 [0.0100.002] 12.70 [0.500] 12 4 6 2.54 [0.100] s *pin 6 not ?tted on single output variants * 3c package all dimensions in mm (inches) controlling dimension is mm. all pins on a 2.54 (0.100) pitch and within 0.1 (0.004) of true position from pin 1 at seating plane s weight: 2.1g (c) 2.0g (3c) 1.9g (pc) pin connections pin c 3c single dual 1+v in +v in +v in 2-v in -v in -v in 4-v out 5-v out -v out 6+v out 0v 7+v out +v out
cmr series isolated 0.75w single and dual output isolated dc/dc converters kdc_cmr.b01 page 11 of 11 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. ? 2016 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 c package 3c package x4 holes ? 1.15 1.00 [ ? 0.045 0.039 ] 2.54 [0.100] 2.54 [0.100] all dimensions in millimetres 0.25 (inches 0.1) * hole not required for single output variants *

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