NME Series www.murata-ps.com Isolated 1W Single Output DC-DC Converters FEATURES Short circuit protection options UL 60950 recognised Single isolated output 1kVDC isolation ‘Hi Pot Test’ Wide temperature performance at full 1 watt load, –40°C to 85°C2 Industry standard pinout 5V, 12V, 15V & 24V input 5V, 9V, 12V and 15V output Fully encapsulated with toroidal magnetics No external components required Pin compatible with CME, CRE1, CRL2, LME, MEE1, MEE3, NKE & NML DESCRIPTION The NME series of DC-DC Converters is particularly suited to isolating and/or converting DC power rails. The galvanic isolation allows the device to be configured to provide an isolated negative rail in systems where only positive rails exist. The wide temperature range guarantees startup from –40°C and full 1 watt output at 85°C2. For lower ripple, refer to output ripple reduction section. The NME series offers short circuit protection options (PC) across the operating temperature range. Short circuits of less than 1Ω cause the converter to enter a ‘foldback’ limiting mode such that the input current is approximately 95mA for 0505 variant. Protection is continuous and auto-resetting on removal of the short circuit. V mA mA NME0505DC NME0509DC NME0512DC NME0515DC NME0524DC NME0505SC NME0509SC NME0512SC NME0515SC NME0524SC NME1205DC NME1212DC NME1215DC NME1205SC NME1209SC NME1212SC NME1215SC NME1515SC NME2405DC NME2412DC NME2415DC NME2405SC NME2412SC NME2415SC 5 5 5 5 5 5 5 5 5 5 12 12 12 12 12 12 12 15 24 24 24 24 24 24 5 9 12 15 24 5 9 12 15 24 5 12 15 5 9 12 15 15 5 12 15 5 12 15 NME0505SPC NME0505DPC 5 5 5 5 200 286 12 14 16 40 111 260 8 9 60 75 83 256 6.5 7.5 50 65 67 250 6 7.5 10 25 42 248 5.5 7.5 140 180 200 286 12 14 16 40 111 260 8 9 60 75 83 256 6.5 7.5 50 65 67 250 6 7.5 10 25 42 248 5.5 7.5 140 180 200 117 8 10 12 30 83 104 4 5 8 20 67 110 3 4 40 55 200 117 8 10 12 30 111 115 5 5.5 60 75 83 104 4 5 50 65 67 111 3 4 40 55 67 81 2.5 3 150 200 58 8.5 10 150 83 52 3 4 150 67 51 2.5 3 150 200 58 8.5 10 150 83 52 3 4 150 67 51 2.5 3 150 Short Circuit Protection Options 200 255 9.5 12 11 25 75 200 255 9.5 12 11 25 75 NME1209DC NME2409DC NME2409SC 12 24 24 9 9 9 111 115 111 54 111 54 5 4 4 5.5 5 5 60 75 150 150 % pF Package Style MTTF1 Efficiency (Typ) Isolation Capacitance Efficiency (Min) % mV p-p Typ. Max. Typ. Max. V MIL. Tel. kHrs 69 77 78 80 80 69 77 78 80 80 69 76 75 69 74 76 75 82 70 80 80 70 80 80 30 37 33 40 48 30 37 33 40 48 33 55 52 33 48 55 52 2493 1780 1313 2493 2311 1780 1313 40 78 79 40 78 79 201 163 136 201 163 136 77 77 22 2887 47047 SIP 22 2887 47047 DIP 74 75 75 3415 3078 2205 1532 DIP 3415 3078 2205 1532 SIP DIP SIP DIP SIP Recommended Alternative MEE1S1209DC DIP MEE1S2409DC SIP MEE1S2409SC 48 2311 59 185 59 185 INPUT CHARACTERISTICS Parameter Voltage range Input short circuit current Input Reflected ripple current For full details go to www.murata-ps.com/rohs Ripple & Noise Nominal Input Voltage Output Voltage Output Current Input Current at Rated Load Order Code Load Regulation2 SELECTION GUIDE Conditions Min. Typ. Max. Units Continuous operation, 5V input types Continuous operation, 12V input types Continuous operation, 15V input types Continuous operation, 24V input types Short circuit variants 4.5 10.8 13.5 21.6 5.0 12.0 15 24 95 5.5 13.2 16.5 26.4 V 3 15 90 48 Short circuit variants 15V input type All other variants3 26 mA mA p-p 1. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load. 2. NME1515SC, NME24XXXC prior to date code X1635 have operating temperature range of 0 to 70°C . 3. Excludes 24V input types. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. www.murata-ps.com/support KDC_NME.I02 Page 1 of 11 NME Series Isolated 1W Single Output DC-DC Converters OUTPUT CHARACTERISTICS Parameter Conditions Rated Power Voltage Set Point Accuracy See derating curves See tolerance envelope High VIN to low VIN ; All short circuit types High VIN to low VIN ; All other output types Line regulation Min. Typ. Max. Units 1.0 W 1.15 1.0 1.2 1.2 %/% Typ. Max. Units ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso= 1000VDC 1000 Parameter Conditions Min. Switching frequency 5V input types 12V input types 15V input types 24V input types Short circuit types VDC GΩ 10 GENERAL CHARACTERISTICS Typ. Max. 110 145 100 100 91 Units kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage All output types1 -40 -50 Cooling Max. 85 130 41 32 5V output types All other output types2 Non-short circuit types Case Temperature above ambient Typ. Short circuit types (DIP) Short circuit types (SIP) Free air convection Units °C 23 24 ABSOLUTE MAXIMUM RATINGS Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, NME05 types Input voltage VIN, NME12 types Input voltage VIN, NME15 types Input voltage VIN, NME24 types 260°C 7V 15V 18V 28V TEMPERATURE DERATING GRAPH Non-short circuit types1: Short circuit types: 1.5 85°C 1.0 0.5 Safe Operating Area 120°C 0 -40 100 50 0 Ambient Temperature (°C) 150 Output Power (W) Output Power (W) 1.5 1.0 0.5 0 -40 85°C Safe Operating Area 100 50 0 Ambient Temperature (°C) 150 1. NME1515SC, NME24XXXC prior to date code X1635 have operating temperature range of 0 to 70°C . 2. Excludes 24V input types. www.murata-ps.com/support KDC_NME.I02 Page 2 of 11 NME Series Isolated 1W Single Output DC-DC Converters 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 NME 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?” The NME has been 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 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 NME 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. SAFETY APPROVAL The NME series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature limit of 100ºC. Case temperature measured on the face opposite the pins. The NME Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below. NME05xxxxC: 0.5A NME12xxxxC: 0.25A NME15xxxxC: 0.2A NME24xxxxC: 0.12A All fuses should be UL recognised and rated at 125V. File number E151252 applies. RoHS COMPLIANCE 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 www.murata-ps.com/support KDC_NME.I02 Page 3 of 11 NME Series Isolated 1W Single Output DC-DC Converters 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%. Capacitive loading and start up Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product series will start into a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF. Start-up time μs 991 3524 5630 7750 19850 682 2102 4030 6193 685 135 260 430 640 350 NME0505XC NME0509XC NME0512XC NME0515XC NME0524XC NME1205XC NME1209XC NME1212XC NME1215XC NME1515SC NME2405XC NME2409XC NME2412XC NME2415XC NME0505XPC Typical Start-Up Wave Form Ripple & Noise Characterisation Method Ripple and noise measurements are performed with the following test configuration. C1 1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC-DC converter 10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC-DC converter with an ESR of less than 100mΩ at 100 kHz C3 100nF multilayer ceramic capacitor, general purpose R1 450Ω resistor, carbon film, ±1% tolerance R2 50Ω 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 specified values. C2 Differential Mode Noise Test Schematic DC/DC Converter OSCILLOSCOPE C1 C2 C3 + SUPPLY Input - + R1 T1 R2 Y INPUT Output - R LOAD www.murata-ps.com/support KDC_NME.I02 Page 4 of 11 NME Series Isolated 1W Single Output DC-DC Converters 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 recommended. 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 current, 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 Resonant Frequency) should be >20MHz. L DC Power Source NME0505XC NME0509XC NME0512XC NME0515XC NME0524XC NME1205XC NME1209XC NME1212XC NME1215XC NME1515SC NME2405XC NME2409XC NME2412XC NME2415XC NME0505XPC C Load DC L, μH 47 47 68 100 100 100 47 68 100 Inductor SMD 82473C 82473C 82683C 82104C 82104C 82104C 82473C 82683C 82104C Through Hole 11R473C 11R473C 11R683C 11R104C 11R104C 11R104C 11R473C 11R683C 11R104C Capacitor C, μF 4.7uF 1uF 1uF 0.47uF 0.47 4.7uF 1uF 0.47uF 0.47uF 22 82223C 11R223C 1uF www.murata-ps.com/support KDC_NME.I02 Page 5 of 11 NME Series Isolated 1W Single Output DC-DC Converters TOLERANCE ENVELOPES 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. 5V, 12V, 15V & 24V Input types Short circuit +9% +10% Typical L +5% oad Line +2.5% +4% -2.5% Output Voltage Output Voltage VNOM -7.5% 100 75 50 25 Output Load Current (%) 10 0% -6% 100 75 50 25 10 Output Load Current (%) EFFICIENCY VS LOAD 5V & Short circuit input variants 12V Inputs 90 90 80 80 70 70 60 NME0505XC NME0509XC 50 NME0512XC NME0515XC 40 NME0524XC NME0505XPC 30 Efficiency (%) Efficiency (%) 60 NME1209XC 40 20 10 10 NME1215XC 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 Load (%) Load (%) 15V Inputs 24V Inputs 90 70 80 90 100 90 80 80 70 70 60 60 50 NME1515SC 40 Efficiency (%) Efficiency (%) NME1212XC 30 20 0 NME1205XC 50 NME2405XC 50 NME2409XC NME2412XC 40 30 30 20 20 10 10 NME2415XC 0 0 0 10 20 30 40 50 60 Load (%) 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Load (%) www.murata-ps.com/support KDC_NME.I02 Page 6 of 11 NME Series Isolated 1W Single Output DC-DC Converters EMC FILTERING AND SPECTRA FILTERING The following table shows the additional input capacitor and input inductor 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 line) adherence limits. L DC C DC C Ceramic capacitor Inductor Part Number L, μH NME0505XC NME0509XC NME0512XC NME0515XC NME0524XC NME1205XC NME1209XC NME1212XC SMD Capacitor Inductor Through Hole C, μF Part Number 4.7 13R472C 4.7 4.7 13R472C 4.7 10 13R103C 1 NME1215XC NME1515SC NME2405XC NME2409XC NME2412XC NME2415XC NME0505XPC 10 13R103C 1 L, μH Capacitor Through Hole C, μF 22 13R223C 10 22 13R223C 10 13R103C 1 10 SMD 82103C NME0505XC NME0509XC NME0512XC NME0515XC www.murata-ps.com/support KDC_NME.I02 Page 7 of 11 NME Series Isolated 1W Single Output DC-DC Converters EMC FILTERING AND SPECTRA NME0524XC NME0505XPC 80 70 60 dBuV 50 40 30 20 10 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) NME1205XC NME1209XC NME1212XC NME1215XC www.murata-ps.com/support KDC_NME.I02 Page 8 of 11 NME Series Isolated 1W Single Output DC-DC Converters EMC FILTERING AND SPECTRA NME1515SC NME2405XC NME2409XC NME2412XC NME2415XC www.murata-ps.com/support KDC_NME.I02 Page 9 of 11 NME Series Isolated 1W Single Output DC-DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS - 8 PIN DIP DIP Package SIP Package 11.6±0.15 [0.457±0.006] Pin Function 1 4 5 7 -VIN +VIN +VOUT -VOUT NME XXXXDC PIN CONNECTIONS - 4 PIN SIP 9.9±0.15 [0.390±0.006] 11.53±0.2 [0.454±0.008] 10.00±0.25 [0.394±0.010] 0.40 [0.016] MIN NME 6.9±0.15 [0.272±0.006] XXXXSC Pin Function 1 2 3 4 -VIN +VIN -VOUT +VOUT S 4.10±0.5 [0.161±0.020] 4.10±0.5 [0.161±0.020] 1 2 3 4 0.5±0.05 [0.020±0.002] 1.99±0.25 [0.078±0.010] 1 2.54 [0.100] 4 (2.21 [0.087]) 1.14±0.25 [0.045±0.010] 0.50±0.05 [0.020±0.002] 0.25±0.05 [0.010±0.002] 7.62 [0.300] 7 0.25±0.05 [0.010±0.002] (1.13 [0.044]) 5 6.10 +0.15 -0.20 -0.008 ] [0.240 +0.006 5.08 [0.200] 7.62 [0.300] 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: 1.30g (SIP) 1.48g (DIP) 1.5g (SP DIP) www.murata-ps.com/support KDC_NME.I02 Page 10 of 11 NME Series Isolated 1W Single Output DC-DC Converters PACKAGE SPECIFICATIONS (continued) RECOMMENDED FOOTPRINT DETAILS 4 Pin SIP Package 8 Pin DIP Package 2.54 [0.100] 2.54 [0.100] x4 HOLES 0.045 Ø 1.15 1.00 Ø 0.039 [ x4 HOLES Ø 0.045 0.039 Ø 1.15 1.00 ] [ ] 2.54 [0.100] 2.54 [0.100] TUBE OUTLINE DIMENSIONS 4 Pin SIP Tube 8 Pin DIP Tube 12.0 [0.472] 9.3 [0.366] 12.43 [0.489] 14.5 [0.571] 18.0 [0.709] 5.07±1.10[0.200±0.04] 5.05 [0.199] Unless otherwise specified all dimensions in mm [inches] ±0.55mm [0.022]. 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] Tube Quantity : 35 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/ 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. www.murata-ps.com/support KDC_NME.I02 Page 11 of 11