www.murata-ps.com s NOT RECOMMENDED NMXU Series NSS 5W Single & Dual Output DC/DC Converters FOR NEW DESIGIsolated SELECTION GUIDE Order Code FEATURES RoHS compliant Single or dual output 1kVDC isolation Pin compatible with NMXSO series Power density 0.85W/cm3 UL 94V-0 package material Footprint 5.88cm2 V V A % Isolation Capacitance (Typ.) pF 5 5 5 12 12 12 5 5 5 12 12 12 ±5 ±12 ±15 ±5 ±12 ±15 5 12 15 5 12 15 ±0.5 ±0.208 ±0.167 ±0.5 ±0.208 ±0.167 1.0 0.417 0.333 1.0 0.417 0.333 75 75 75 75 75 75 75 75 75 75 75 75 31.5 33 34.2 34.7 52.9 59.9 30.6 31.2 32.6 32.5 51.9 54.1 Nominal Input Voltage NMXD0505UC NMXD0512UC NMXD0515UC NMXD1205UC NMXD1212UC NMXD1215UC NMXS0505UC NMXS0512UC NMXS0515UC NMXS1205UC NMXS1212UC NMXS1215UC INPUT CHARACTERISTICS 5V & 12V input Parameter 5V, 12V & 15V output Voltage range No heatsink required Reflected ripple voltage Fully encapsulated with toroidal magnetics No external components required PCB mounting Output Current Efficiency (Typ.) MTTF1 Recommended Alternative kHrs 779 158 86 233 107 68 792 158 86 233 107 68 NCS6D1205C NCS6D1212C NCS6D1215C NCS6S1205C NCS6S1212C NCS6S1215C 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. Industry standard pinout Internal SMD construction Output Voltage Conditions Min. Typ. Max. Continuous operation, 5V input types Continuous operation, 12V input types BW=DC to 20MHz, all output types 4.5 10.8 5.0 12.0 5.5 13.2 200 Units mV Max. Units 5.0 W V OUTPUT CHARACTERISTICS Parameter Conditions Rated Power Voltage Set Point Accuracy Line regulation TA= 0°C to 70°C See tolerance envelope High VIN to low VIN 10% load to rated load, 5V output types 10% load to rated load, 12V & 15V output types BW=DC to 20MHz, all output types DESCRIPTION Load Regulation The NMXU 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 devices are particularly suited for use in distributed power systems where there is low variation in the bus voltage levels. Ripple and Noise Min. Typ. 1.1 7 5 %/% 12 7.5 125 % mV p-p ABSOLUTE MAXIMUM RATINGS Short-circuit protection2 Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, NMXU05 types Input voltage VIN, NMXU12 types 1 second 300°C 7V 15V 1. Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2. Supply voltage must be disconnected at the end of the short circuit duration. 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_NMXU.D01 Page 1 of 3 NMXU Series Isolated 5W Single & Dual Output DC/DC Converters ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso= 1000VDC 1000 1 Parameter Conditions Min. Switching frequency All input types Typ. Max. Units VDC GΩ GENERAL CHARACTERISTICS Typ. Max. 70 Units kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage All output types 0 -55 Case temperature rise above ambient Cooling 5V output types All other output types Free air convection Typ. Max. Units 70 100 30 20 TOLERANCE ENVELOPE °C RoHS COMPLIANCE INFORMATION +10% Output Voltage +5% VNOM Typical L oad Line +2.5% 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 Matte Tin over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. -2.5% -7.5% 10 75 50 25 Output Load Current (%) 100 For further information, please visit www.murata-ps.com/rohs 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 NMXU 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 NMXU 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 NMXU 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_NMXU.D01 Page 2 of 3 NMXU Series Isolated 5W Single & Dual Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS 0.985 (25.03) Single Output Variants Pin Function 0.925 (23.50) 1 2 3 4 5 NMXD0515UC XYYWW 0.394 (10.00) -VIN +VIN +VOUT Not fitted -VOUT Dual Output Variants Pin Function 1 2 3 4 5 VIN +VIN +VOUT Common -VOUT RECOMMENDED FOOTPRINT DETAILS 0.035±0.00197 (0.90±0.05) 0.157 (4.0) )0-&4 0.2 (5.08) 1 2 0.80 (20.32) 5 4 3 * 0.063 (1.59) 0.093 (2.35) 0.0098±0 (0.25±0. 0.4 (10.16) 0.4 (10.16) Weight: 10g * Pin not fitted on single output variants. 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. * Hole not required for single output variants All dimensions in inches ±0.01 (mm ±0.25mm). TUBE OUTLINE DIMENSIONS Not to scale. All dimensions in inches ±0.01 (mm ±0.25mm). 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. © 2013 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_NMXU.D01 Page 3 of 3