lme series isolated 250mw single output dc-dc converters kdc_lmec.g02 page 1 of 4 www.murata-ps.com www.murata-ps.com/support for full details go to www.murata-ps.com/rohs $ 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 13.2 output characteristics parameter conditions min. typ. max. units rated power t a =0c to 70c, see derating graph 0.25 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 15 % 10% load to rated load, all other types 10 ripple and noise bw=dc to 20mhz, all output types 100 mv p-p isolation characteristics parameter conditions min. typ. max. units isolation test voltage flash tested for 1 second 1000 vdc resistance viso= 500vdc 1 g general characteristics parameter conditions min. typ. max. units switching frequency all input types 100 khz absolute maximum ratings lead temperature 1.5mm from case for 10 seconds 260c input voltage v in , lme05 types 7v input voltage v in , lme12 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 ? single output rail ? 1kvdc isolation hi pot test ? high ef?ciency for low power applications ? sip & dip package styles ? 5v & 12v input ? 5v, 9v, 12v & 15v output ? internal smd construction ? no external components required ? mttf up to 2.7 million hours ? custom solutions available ? pin compatible with cme, cre1, nke, nme, nml, mee1 & mee3 series product overview the lme series of dc-dc converters are opti- mised for low-power operation. they are ideally suited to generating a negative supply where only a positive rail exists. selection guide order code nominal input voltage output voltage output current ef?ciency isolation capacitance mttf 1 package style v v ma % pf khrs lme0505dc 5 5 50 70 29 2279 dip lme0512dc 5 12 21 75 41 624 dip LME0505SC 5 5 50 70 29 2279 sip lme0509sc 5 9 28 75 37 1139 sip lme0512sc 5 12 21 75 41 624 sip lme0515sc 5 15 16 75 40 357 sip lme1209dc 12 9 28 75 40 434 dip lme1205sc 12 5 50 70 38 536 sip lme1212sc 12 12 21 75 43 330 sip lme1215sc 12 15 16 75 45 237 sip recommended alternative lme0509dc 5 9 28 75 37 1139 dip lme0509sc lme0515dc 5 15 16 75 40 357 dip lme0515sc lme1205dc 12 5 50 70 38 536 dip lme1205sc lme1209sc 12 9 28 75 37 1139 sip lme1209dc lme1212dc 12 12 21 75 43 330 dip lme1212sc lme1215dc 12 15 16 75 45 237 dip lme1215sc
lme series isolated 250mw single output dc-dc converters kdc_lmec.g02 page 2 of 4 www.murata-ps.com/support temperature characteristics parameter conditions min. typ. max. units speci?cation all output types 0 70 c storage -50 130 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 lme 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 lme 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 lme series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enamelled 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 recognised 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 0.125 0.250 0.375 safe operating area ambient temperature (c) output power (w) 70c 125c 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. the dip types are matte tin over nickel preplate. both types in this series are backward compatible with sn/pb soldering systems. for further information, please visit www.murata-ps.com/rohs 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 tha n 5%. the voltage tolerance envelope shows typical load regulation characteristics for this product series. the toler- ance envelope is the maximum output voltage variation due to changes in output loading.
lme series isolated 250mw single output dc-dc converters kdc_lmec.g02 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 all dimensions in mm (inches) controlling dimension is mm. sip: 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 dip: all pins on a 2.54 (0.100) pitch and within 0.25 (0.010) of true position weight: 1.30g (sip) 1.48g (dip) dip package sip package 1 11.60.15 [0.4570.006] 6.90.15 [0.2720.006] 4.100.5 [0.1610.020] 1.140.25 [0.0450.010] 1.990.25 [0.0780.010] 9.90.15 [0.3900.006] 5.08 [0.200] 0.50.05 [0.0200.002] 0.250.05 [0.0100.002] 7.62 [0.300] 7.62 [0.300] 7 4 5 lme xxxxdc xyyww 11.530.2 [0 .4540.008] 10.000.25 [0 .3940.010] 0.40 [0.016] min 4.100.5 [0 .1610.020] (1.13 [0.044]) (2.21 [0.087]) 6.10 +0.15 -0.20 [ 0.240 +0.006 -0.008 ] 2.54 [0.100] 0.500.05 [0 .0200.002] 0.250.05 [0 .0100.002] 1234 s lme xxxxsc xyyww
lme series isolated 250mw single output dc-dc converters kdc_lmec.g02 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. ? 2018 murata power solutions, inc. 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 8 pin dip tube 4 pin sip tube 8 pin dip package 4 pin sip package 2.54 (0.100) 2.54 (0.100) 1.15 1.00 x4 holes ? ] [ 0.045 0.039 ? 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). tube length (8 pin dip) : 520mm [20.472] 2.0 [0.079]. tube length (4 pin sip) : 520mm [20.472] 2.0 [0.079]. 5.0 [0.197] 12.43 [0.489] 18.0 [0.709] 9.3 [0.366] 12.0 [0.472] 14.5 [0.571] 5.070.80 [0.2000.03] 5.05 [0.199] all dimensions in mm (inches) controlling dimension is mm.
|
