DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 4
Technical content
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 Ḥ INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units OUTPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Rated Power T A=0°C to 70°C, See derating graph 0.25 W Voltage Set Point Accuracy See tolerance envelope Line regulation High V IN to low VIN 1.0 1.2 %/% Load Regulation2 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 GΩ 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 260°C Input voltage VIN, LME05 types 7V Input voltage VIN, LME12 types 15V 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
FEATURES
Single output rail 1kVDC isolation ‘Hi Pot Test’ High efficiency 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 Efficiency Isolation Capacitance MTTF1 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
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 Specification All output types 0 70 °CStorage -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 VNOM 100755025 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 specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. 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 specific agency approvals, such as the LME series, 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 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 barrier; 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 circuits 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 insulation. 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 be reduced by 20% from specified 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. 150100500 0.125 0.250 0.375 Safe Operating Area Ambient Temperature (°C) Output Power (W) 70°C 125°C RoHS COMPLIANT INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260°C for 10 seconds. The pin termination finish 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 specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 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.
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) 5.08 [0.200] 7.62 [0.300] 7.62 [0.300] LME XXXXDC XYYWW 0.40 [0.016] MIN (1.13 [0.044]) (2.21 [0.087]) 6.10 +0.15 -0.008 ] 1234 S LME XXXXSC XYYWW
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 herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change 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 Ø ][ 0.045 0.039 Ø 2.54 (0.1) 2.54 (0.1) 1.15 (0.0453) 1.00 (0.0394)Ø 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] 14.5 [0.571] 5.05 [0.199] All dimensions in mm (inches) Controlling dimension is mm.