NMG Series www.murata-ps.com Isolated 2W Single Output DC/DC Converters mVp-p % % pF kHrs 81 84 84 84 82 81 83 85 85 84 80 82 84 84 80 84 84 85 83 86.5 87.5 87.5 85 83.5 87 88 88 86.5 83 86.5 87.5 88 84 87.5 88 88.5 33 40 40 40 35 40 61 74 68 60 40 55 65 75 45 55 75 85 3956 3682 3299 2833 2189 2519 2405 2235 2011 2189 3963 3176 2875 2483 3659 2496 3824 3500 Internal SMD construction NMG0505SC NMG0509SC NMG0512SC NMG0515SC NMG0524SC NMG1205SC NMG1209SC NMG1212SC NMG1215SC NMG1224SC NMG1505SC NMG1509SC NMG1512SC NMG1515SC NMG2405SC NMG2409SC NMG2412SC NMG2415SC Fully encapsulated with toroidal magnetics When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the additional external capacitance for reliable start up. No external components required INPUT CHARACTERISTICS MTTF up to 3.9 million hours Parameter Conditions Min. Typ. Max. No electrolytic or tantalum capacitors Voltage range Continuous operation, 5V input types Continuous operation, 12V input types Continuous operation, 15V input types Continuous operation, 24V input types 4.5 10.8 13.5 21.6 PRODUCT OVERVIEW Reflected ripple current 5 12 15 24 7.5 5.5 13.2 16.5 26.4 15 mA p-p The NMG 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 2 watt output at 85°C. Pin compatibility with the NMR and MER1 series ensures ease of upgradeability. ABSOLUTE MAXIMUM RATINGS Max. Units 2 W 1.2 %/% FEATURES UL 60950 recognised Efficiency from 80% Wide temperature performance at full 2 Watt load, –40°C to 85°C UL 94V-0 package material Industry standard pinout 1kVDC isolation 5V, 12V, 15V & 24V input 5V, 9V, 12V, & 15V output Pin compatible with NMR series Lead temperature 1.5mm from case for 10 seconds Internal power dissipation Input voltage VIN, NMG05 types Input voltage VIN, NMG12 types Input voltage VIN, NMG15 types Input voltage VIN, NMG24 types 35 25 25 25 60 35 25 25 25 40 60 40 40 40 70 50 50 50 MTTF2 28 20 18 16 35 22 16 13 12 25 40 25 25 25 40 30 25 30 Isolation Capacitance 7.3 5.9 5.1 4.5 6 4.9 3.1 2.9 2.4 4 6 4.5 3.5 3.5 6 4 3.5 3.5 % 5.7 4.2 3.8 3.4 4.3 4.2 2.6 2.4 2.0 2.6 4.3 2.9 2.4 2.3 4.1 2.6 2.1 2 Efficiency (Typ.) 470 455 450 450 465 200 190 190 185 190 160 155 150 150 100 95 95 95 Efficiency (Min.) mA 400 222 167 133 83 400 222 167 133 83 400 222 167 133 400 222 167 133 Ripple & Noise (Max)1 mA 5 9 12 15 24 5 9 12 15 24 5 9 12 15 5 9 12 15 Ripple & Noise (Typ)1 V 5 5 5 5 5 12 12 12 12 12 15 15 15 15 24 24 24 24 Load Regulation (Max) V Load Regulation (Typ) Output Voltage Input Current at Rated Load Nominal Input Voltage Order Code Output Current SELECTION GUIDE Units V 260°C 550mW 7V 15V 18V 28V OUTPUT CHARACTERISTICS Parameter Rated Power Voltage Set Point Accuracy Line regulation Conditions TA=-40°C to 85°C See tolerance envelope High VIN to low VIN Min. Typ. 1.05 1. See Ripple & Noise characterisation method. 2. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support KDC_NMG.E02 Page 1 of 7 NMG Series www.murata-ps.com Isolated 2W Single Output DC/DC Converters ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso= 1000VDC 1000 10 Typ. Max. Units VDC GΩ GENERAL CHARACTERISTICS Parameter Conditions Switching frequency 24V output types All other types Min. Typ. Max. 70 60 Units kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage All output types -40 -50 Case Temperature above ambient 5V input types and 5V output types All other types Free air convection Cooling Typ. Max. Units 85 125 30 25 °C EFFICIENCY VS LOAD 5V Input 12V Input 90 90 80 80 70 70 NMG0512SC NMG0505SC NMG0509SC NMG0515SC NMG0524SC 50 NMG1205SC 60 NMG1209SC Efficiency (%) Efficiency (%) 60 40 NMG1215SC NMG1224SC 40 30 30 20 20 10 10 0 NMG1212SC 50 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 Load (%) 15V Input 60 70 80 90 100 24V Input 90 90 80 80 70 70 NMG1505SC 60 NMG1512SC NMG1515SC 40 NMG2409SC NMG2412SC NMG1509SC 50 NMG2405SC 60 Efficiency (%) Efficiency (%) 50 Load (%) 50 NMG2415SC 40 30 30 20 20 10 10 0 0 0 10 20 30 40 50 Load (%) 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Load (%) www.murata-ps.com/support KDC_NMG.E02 Page 2 of 7 NMG Series Isolated 2W Single Output DC/DC Converters TEMPERATURE DERATING GRAPH Output Power (W) 3 85°C 2 1 0 -40 Safe Operating Area 100 50 0 Ambient Temperature (°C) 150 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 NMG series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 minute. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” The NMG series has been recognized 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 NMG 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 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 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 NMG 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 130ºC. Case temperature measured on the face opposite the pins. File number E151252 applies. The NMG Series of converters are not internally fused so to meet the requirements of UL 60950 an input line fuse should always be used. An anti-surge 2A should be used for NMG05xxSC models, and an anti-surge 0.75A should be used for NMG12xxSC models. All fuses should be UL approved and rated to at least the maximum allowable DC input voltage. 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 is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. 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_NMG.E02 Page 3 of 7 NMG Series Isolated 2W 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. NMG0505SC NMG0509SC NMG0512SC NMG0515SC NMG1205SC NMG1209SC NMG1212SC NMG1215SC Start-up time μs 444 1120 1930 3470 409 1320 1320 2270 NMG0524SC 2200 NMG1224SC 1400 Start-up time μs 100 170 300 450 80 130 220 330 NMG1505SC NMG1509SC NMG1512SC NMG1515SC NMG2405SC NMG2409SC NMG2412SC NMG2415SC Typical Start-Up Wave Form Ripple & Noise Characterisation Method All measurement to be taken with the following components connected to the UUT as detailed below. 50 Ohm coax cable, solder connections one end, BNC plug at the other end. C1 C2 1μF X7R multilayer ceramic capacitor rated at minimum 3 x the output voltage of the UUT 10μF tantalum capacitor rated at minimum 1.5 x the output voltage of the UUT with ESR of less than 100 milliohms at 100 kHz e.g. AVX TPS series. 100nF multilayer ceramic capacitor, general purpose 450 Ohm resistor, carbon film, ±1% 50 Ohm BNC termination 3T of the coax cable through a ferrite toroid eg Ferroxcube TN32/19/13-3E25 Resistive load at the UUT maximum rating. Connections via twisted wires. C3 R1 R2 T1 RLOAD Measured values are multiplied by 10 to obtain the specified values. 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_NMG.E02 Page 4 of 7 NMG Series Isolated 2W 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 Power Source NMG0505SC NMG0509SC NMG0512SC NMG0515SC NMG0524SC NMG1205SC NMG1209SC NMG1212SC NMG1215SC NMG1224SC NMG1505SC NMG1509SC NMG1512SC NMG1515SC NMG2405SC NMG2409SC NMG2412SC L, μH 4.7 10 22 47 47 4.7 10 22 47 47 4.7 10 22 47 4.7 10 22 Inductor SMD 82472C 82103C 82223C 82473C 82473C 82472C 82103C 82223C 82473C 82473C 82472C 82103C 82223C 82473C 82472C 82103C 82223C DC C Load DC Through Hole 11R472C 11R103C 11R223C 11R473C 11R473C 11R472C 11R103C 11R223C 11R473C 11R473C 11R472C 11R103C 11R223C 11R473C 11R472C 11R103C 11R223C Capacitor C, μF 10 4.7 2.2 1 1 10 4.7 2.2 1 1 10 4.7 2.2 1 10 4.7 2.2 www.murata-ps.com/support KDC_NMG.E02 Page 5 of 7 NMG Series Isolated 2W Single Output DC/DC Converters TOLERANCE ENVELOPES The voltage tolerance envelopes show typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to changes in output loading and set point accuracy. 1224, 1515, 2412, 2415 2405 +6% +2% 0% Output Voltage Output Voltage +3% +2% 0% -3% 10 25 75 50 Output Load Current (%) -3% 10 100 25 75 50 Output Load Current (%) 100 05XX,, 1205, 1209, 1212, 1215, 1505, 1509, 1512, 2409 Output Voltage +5% +2% 0% -4% 10 25 50 75 100 Output Load Current (%) www.murata-ps.com/support KDC_NMG.E02 Page 6 of 7 NMG Series Isolated 2W Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS - 4 PIN SIP 0.774 (19.65) (Max.) 0.301 (7.65) (Max.) 0.4 (10.15) (Max.) Pin Function 1 2 4 6 +VIN -VIN -VOUT +VOUT NMG0505SC XYYWWi 0.0016 (0.40) Min. TUBE OUTLINE DIMENSIONS 0.366 (9.30) 6 0.50 (0.020) 0.099 (2.52) 0.061 (1.54) 0.057 (1.45) 0.039 (1.00) 0.0118 (0.30) 0.0079 (0.20) 0.5 (12.70) 0.020 (0.50) 0.1 (2.54) 0.709 (18.00) 0.181 (4.60) 0.142 (3.60) 4 0.489 (12.43) 1 2 0.2 (5.00) 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. Weight: 2.8g Unless otherwise stated all dimensions in inches (mm) ±0.5mm. Tube length : 20.47 (520mm ±2mm). Tube Quantity : 25 RECOMMENDED FOOTPRINT DETAILS 0.045 (1.15) Ø 0.039 (1.00) 4 HOLES 0.00394 (0.1) 0.1 (2.54) 0.1 (2.54) Unless otherwise stated all dimensions in inches (mm) ±0.5mm. Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, 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/ 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. © 2014 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_NMG.E02 Page 7 of 7