technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 1 of 7 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 input current at rated load load regulation (typ) load regulation (max) ripple & noise (typ) 1 ripple & noise (max) 1 ef? ciency (min.) ef? ciency (typ.) isolation capacitance mttf 2 v v ma ma % mvp-p % % pf khrs mer1s0505sc 5 5 200 233 5.5 6.5 15 25 82 84 50 7684 mer1s0509sc 5 9 111 226 4.2 5 11 20 84 87 55 7698 mer1s0512sc 5 12 84 227 4.6 5.2 9 17 85 87 53 7175 mer1s0515sc 5 15 67 225 4.4 5 9 17 86 87.5 54 6496 mer1s1205sc 12 5 200 97 4.5 5 11 20 82 84 49 7569 mer1s1209sc 12 9 111 95 3 3.4 9 17 84 86.5 66 7317 MER1S1212SC 12 12 84 93 3 3.4 9 17 86 88.5 91 6647 mer1s1215sc 12 15 67 94 2.4 2.7 7 17 85 88 78 6279 mer1s1505sc 15 5 200 79 3.8 4.5 10 20 81 83.5 43 7167 mer1s1509sc 15 9 111 77 2.4 2.8 8 17 83 86.5 68 6906 mer1s1512sc 15 12 84 76 2.3 2.7 7 15 84 87.5 75 6523 mer1s1515sc 15 15 67 75 2.4 2.8 7 15 86 89 107 5916 mer1s2405sc 24 5 200 50 3.1 3.7 15 25 81 84 52 7391 mer1s2409sc 24 9 111 48 2.1 2.5 10 20 83 86.5 75 6490 mer1s2412sc 24 12 84 48 1.8 2.4 9 20 84 87.5 91 6772 mer1s2415sc 24 15 67 48 1.7 2.3 9 20 84 87.5 101 5957 mer1s4805sc 48 5 200 26 3.4 3.9 19 30 77 79.5 47 7354 mer1s4809sc 48 9 111 25 2.4 2.8 14 25 80 83 76 7120 mer1s4812sc 48 12 84 25 2.0 2.4 12 25 79 82.5 88 7088 mer1s4815sc 48 15 67 25 1.9 2.4 11 25 80 83 103 7238 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, 15v input types 13.5 15 16.5 continuous operation, 24v input types 21.6 24 26.4 continuous operation, 48v input types 43.2 48 52.8 re? ected ripple current 5v input types 7 15 ma p-p 12v input types 4 12 15v input types 4 12 24v input types 8 20 48v input types 25 40 absolute maximum ratings lead temperature 1mm from case for 10 seconds 260c input voltage v in , 5vin types 7v input voltage v in , 12vin types 15v input voltage v in , 15vin types 18v input voltage v in , 24vin types 28v input voltage v in , 48vin types 54v 1. see ripple & noise characterisation method. 2. calculated using mil-hdbk-217f fn2 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 ul 60950 recognized rohs compliant typical ef? ciency to 89% wide temperature performance at full load, C40c to 85c ul 94v-0 package material no heatsink required industry standard pinout 1kvdc isolation 5v, 12v, 15v, 24v, & 48v inputs 5v, 9v, 12v, & 15v output fully encapsulated with toroidal magnetics no external components required no electrolytic or tantalum capacitors product overview the mer1 series is the new high performance version of our 1w nmr series. the mer1 series is more ef? cient and offers improved regulation performance for applications where a wide output voltage variation can not be tolerated. they are ideally suited for providing local supplies on control system boards with the added bene? t of 1kvdc galvanic isolation to reduce switching noise.
technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 2 of 7 www.murata-ps.com output characteristics parameter conditions min. typ. max. units rated power t a =-40 c to 85 c 1w voltage set point accuracy see tolerance envelope line regulation high v in to low v in 1.05 1.1 %/% isolation characteristics parameter conditions min. typ. max. units isolation test voltage flash tested for 1 second 1000 vdc resistance viso= 1000vdc 10 g general characteristics parameter conditions min. typ. max. units switching frequency 5v & 48v input types 62 khz 12v & 15v input types 75 24v input types 82 temperature characteristics parameter conditions min. typ. max. units speci? cation all output types -40 85 c storage -50 125 case temperature rise above ambient 5v, 12v, & 15v input types 15 24v & 48v input types 20 cooling free air convection temperature derating graph output voltage tolerance envelope 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. output load current (%) e g a t l o v t u p t u o v nom 5% 0% -4% 2% 100 75 50 25 10 150 100 50 0 -40 0 0.5 1.0 1.5 85c ambient temperature (c) output power (w) rohs compliant information this series is compatible with rohs soldering systems with a peak wave solder temperature of 260c for 10 seconds. the pin termination ? nish on the sip package type is tin plate, hot dipped over matte tin with nickel preplate. they are backward compatible with sn/pb soldering systems. for further information, please visit www.murata-ps.com/rohs
technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 3 of 7 www.murata-ps.com 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 than 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 start-up time s s mer1s0505sc 600 mer1s1512sc 3375 mer1s0509sc 1730 mer1s1515sc 5090 mer1s0512sc 3780 mer1s2405sc 431 mer1s0515sc 6700 mer1s2409sc 245 mer1s1205sc 750 mer1s2412sc 1634 mer1s1209sc 2605 mer1s2415sc 2682 MER1S1212SC 3754 mer1s4805sc 512 mer1s1215sc 5280 mer1s4809sc 1432 mer1s1505sc 704 mer1s4812sc 2528 mer1s1509sc 1859 mer1s4815sc 3884
technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 4 of 7 www.murata-ps.com 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 mer1s0505sc 10 82103c 11r103c 4.7 mer1s0509sc 22 82223c 11r223c 2.2 mer1s0512sc 47 82473c 11r473c 1 mer1s0515sc 47 82473c 11r473c 1 mer1s1205sc 10 82103c 11r103c 4.7 mer1s1209sc 22 82223c 11r223c 2.2 MER1S1212SC 47 82473c 11r473c 1 mer1s1215sc 47 82473c 11r473c 1 mer1s1505sc 10 82103c 11r103c 4.7 mer1s1509sc 22 82223c 11r223c 2.2 mer1s1512sc 47 82473c 11r473c 1 mer1s1515sc 47 82473c 11r473c 1 mer1s2405sc 10 82103c 11r103c 4.7 mer1s2409sc 22 82223c 11r223c 2.2 mer1s2412sc 47 82473c 11r473c 1 mer1s2415sc 47 82473c 11r473c 1 mer1s4805sc 10 82103c 11r103c 4.7 mer1s4809sc 22 82223c 11r223c 2.2 mer1s4812sc 47 82473c 11r473c 1 mer1s4815sc 47 82473c 11r473c 1
technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 5 of 7 www.murata-ps.com 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 mer1 series of dc/dc converters are all 100% production tested at their stated isolation voltage. this i s 1kvdc for 1 second. a question commonly asked is, what is the continuous voltage that can be applied across the part in normal operation? the mer1 has been recognized by underwriters laboratory for functional insulation, both input and output should normally be mai ntained 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 an element of a safety isolation system. the part could be expected to function correctly with several hundred volts offset applied continuously across the isolation ba rrier; but 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 c ircuits 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 mer1 series has toroidal isolation transformers, with no additional insulation between primar y 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. safety approval the mer1 series has been recognized by underwriters laboratory (ul) to ul 60950 for functional insulation in a maximum ambient temperature of 85c and/or case temperature limit of 130c (case temperature measured on the face opposite the pins). file number e179522 applies. the mer1 series of converters are not internally fused so to meet the requirements of ul 60950 an anti-surge input line fuse sh ould always be used with ratings as de? ned below. mer1s05xxsc: 1a mer1s12xxsc: 0.375a mer1s15xxsc: 0.375a mer1s24xxsc: 0.2a mer1s48xxsc: 0.1a all fuses should be ul approved and rated to at least the maximum allowable dc input voltage.
technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 6 of 7 www.murata-ps.com efficiency vs load mer1s05xxsc mer1s12xxsc mer1s15xxsc mer1s24xxsc mer1s48xxsc 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100 load (%) ef?ciency (%) 15v 12v 9v 5v 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100 load (%) ef?ciency (%) 15v 9v 5v 12v 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100 load (%) ef?ciency (%) 5v 9v 12v 15v 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100 load (%) ef?ciency (%) 5v 9v 12v 15v 15v 0 10 20 30 40 50 60 70 80 90 0 102030405060708090100 load (%) ef?ciency (%) 5v 9v 12v
technical enquiries email: mk@murata-ps.com, tel: +44 (0)1908 615232 mer1 series 1kvdc isolated 1w single output dc/dc converters 2011/01/24 kdc_mer1.b03 page 7 of 7 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 mechanical dimensions recommended footprint details tube outline dimensions pin connections pin function 1+v in 2-v in 4-v out 6 +v out unless otherwise stated, 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. ? 48v input variants: 0.301 (7.65). weight: 48vin types: 2.75g (typ.), all other types: 2.25g (typ.)
unless otherwise stated all dimensions in inches (mm) 0.5mm. tube length : 20.47 (520mm 2mm). tube quantity : 25 unless otherwise stated all dimensions in inches (mm) 0.5mm. 0.774 (19.65) (max.) 0.242 (6.15) max. 0.4 (10.15) max. 0.181 (4.60) 0.141 (3.60) 0.0118 (0.30) 0.0079 (0.20) 0.5 (12.70) 0.05 (1.25) 0.0740.02 (1.880.50) 0.0016 (0.4) min. 0.1 (2.54) 1 2 4 6 ? mer1s0505sc xyyww
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