NML Series www.murata-ps.com Isolated 2W Single Output DC/DC Converters SELECTION GUIDE Order Code Nominal Input Voltage V NML0505SC NML0509SC NML0512SC NML0515SC NML1205SC NML1209SC NML1212SC NML1215SC FEATURES RoHS compliant V mA Input Current at Rated Load mA 5 9 12 15 5 9 12 15 400 222 167 133 400 222 167 133 513 492 479 481 207 198 197 197 Output Voltage 5 5 5 5 12 12 12 12 Output Current Efficiency Isolation MTTF1 Capacitance % pF kHrs 78 81 84 83 81 84 85 85 19 27 32 27 28 42 46 54 2327 1393 832 481 716 593 461 328 Single isolated output INPUT CHARACTERISTICS 1kVDC isolation Parameter Efficiency up to 85% Voltage range Wide temperature performance at full 2 watt load, –40°C to 85°C Reflected ripple current Conditions Min. Typ. Max. Units Continuous operation, 5V input types Continuous operation, 12V input types 5V input types 12V input types 4.5 10.8 5.0 12.0 33 38 5.5 13.2 V Typ. Max. Units 2.0 W 1.2 8.5 5.2 5.5 8.5 %/% 200 mV p-p Max. Units mA p-p Power density 2.01W/cm3 UL 94V-0 package material Footprint from 1.05cm2 Industry standard pinout 5V & 12V input 5V, 9V, 12V and 15V output OUTPUT CHARACTERISTICS Parameter Conditions Rated Power Voltage Set Point Accuracy Line regulation TA=-40°C to 85°C See tolerance envelope High VIN to low VIN 10% load to rated load, 5V output types 10% load to rated load, 9V output types 10% load to rated load, 12V output types 10% load to rated load, 15V output types NML0505SC, BW=DC to 20MHz NML0509SC, BW=DC to 20MHz NML0512SC, BW=DC to 20MHz NML0515SC, BW=DC to 20MHz NML1205SC, BW=DC to 20MHz NML1209SC, BW=DC to 20MHz NML1212SC, BW=DC to 20MHz NML1215SC, BW=DC to 20MHz Load Regulation2 No heatsink required Internal SMD construction Fully encapsulated with toroidal magnetics No external components required Ripple and Noise MTTF up to 2.3 million hours Custom solutions available Pin compatible with LME & NME series No electrolytic or tantalum capacitors DESCRIPTION The NML 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 NME and LME ensures ease of upgradeability. Min. 1.0 7.0 4.5 4.5 3.7 96 67 59 53 76 63 53 45 % ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso= 500VDC 1000 10 Typ. VDC GΩ ABSOLUTE MAXIMUM RATINGS Lead temperature 1.5mm from case for 10 seconds Internal power dissipation Input voltage VIN, NML05 types Input voltage VIN, NML12 types 300°C 805mW 7V 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. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support KDC_NML.E02 Page 1 of 5 NML Series Isolated 2W Single Output DC/DC Converters GENERAL CHARACTERISTICS Parameter Conditions Switching frequency 5V input types 12V input types Min. Typ. Max. 90 90 Units kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage All output types -40 -50 Case Temperature above ambient Cooling Typ. 5V output types All other output types Free air convection TEMPERATURE DERATING GRAPH Max. Units 85 130 45 36 °C TOLERANCE ENVELOPE +10% 2 1 0 -40 85°C Safe Operating Area 100 50 0 Ambient Temperature (°C) Typical L +5% VNOM Output Voltage Output Power (W) 3 150 oad Line +2.5% -2.5% -7.5% 10 75 50 25 Output Load Current (%) 100 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. 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 NML 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 NML 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 NML 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. www.murata-ps.com/support KDC_NML.E02 Page 2 of 5 NML 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. NML0505SC NML0509SC NML0512SC NML0515SC NML1205SC NML1209SC NML1212SC NML1215SC Typical Start-Up Wave Form Start-up time μs 790 1154 2265 2998 396 880 1156 2394 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 C2 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. 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_NML.E02 Page 3 of 5 NML 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 DC Power Source NML0505SC NML0509SC NML0512SC NML0515SC NML1205SC NML1209SC NML1212SC NML1215SC L, μH 22 47 47 68 22 47 47 68 Inductor SMD 82223 82473 82473 82683 82223 82473 82473 82683 C Load DC Through Hole 11R223C 11R473C 11R473C 11R683C 11R223C 11R473C 11R473C 11R683C Capacitor C, μF 2.2uF 1uF 2.2uF 3.3uF 2.2uF 1uF 2.2uF 3.3uF www.murata-ps.com/support KDC_NML.E02 Page 4 of 5 NML Series Isolated 2W Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS - 4 PIN SIP SIP Package 0.55 (14.00) 0.295 (7.50) Pin Function 1 2 3 4 -VIN +VIN -VOUT +VOUT TUBE OUTLINE DIMENSIONS NML0505S XYYWWi 0.133 (3.38) 0.022 (0.50) 0.018 (0.45) 0.0118 (0.30) 0.0079 (0.20) 0.181 (4.60) 0.142 (3.60) 0.022 (0.50) 0.018 (0.45) 0.394 (10.00) 0.049 (1.25) 0.3 (7.62) 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: 2.0g Unless otherwise stated all dimensions in inches (mm) ±0.5mm. Tube length : 20.47 (520mm ±2mm). Tube Quantity : 35 RECOMMENDED FOOTPRINT DETAILS 4 HOLES 0.1 (0.00394) 1.15 (0.0453) Ø 1.00 (0.0394) 2.54 (0.1) RoHS COMPLIANCE INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 300oC for 10 seconds. The pin termination finish on this product series is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs 2.54 (0.1) 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. © 2012 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_NML.E02 Page 5 of 5