NMXU Series www.murata-ps.com Isolated 5W Single & Dual Output DC/DC Converters SELECTION GUIDE Isolation Nominal Input Output Output Efciency 1 Capacitance MTTF Recommended Order Code Voltage Voltage Current (Typ.) (Typ.) Alternative V V A % pF kHrs NMXD0505UC 5 5 0.5 75 31.5 779 Contact Murata NMXD0512UC 5 12 0.208 75 33 158 Contact Murata NMXD0515UC 5 15 0.167 75 34.2 86 Contact Murata FEATURES NMXD1205UC 12 5 0.5 75 34.7 233 NCS6D1205C RoHS compliant NMXD1212UC 12 12 0.208 75 52.9 107 NCS6D1212C Single or dual output NMXD1215UC 12 15 0.167 75 59.9 68 NCS6D1215C NMXS0505UC 5 5 1.0 75 30.6 792 Contact Murata 1kVDC isolation NMXS0512UC 5 12 0.417 75 31.2 158 Contact Murata Pin compatible with NMXSO series NMXS0515UC 5 15 0.333 75 32.6 86 Contact Murata 3 NMXS1205UC 12 5 1.0 75 32.5 233 NCS6S1205C Power density 0.85W/cm NMXS1212UC 12 12 0.417 75 51.9 107 NCS6S1212C UL 94V-0 package material NMXS1215UC 12 15 0.333 75 54.1 68 NCS6S1215C 2 When operated with additional external load capacitance the rise time of the input voltage will determine the maximum external Footprint 5.88cm 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 5V & 12V input INPUT CHARACTERISTICS 5V, 12V & 15V output Parameter Conditions Min. Typ. Max. Units Continuous operation, 5V input types 4.5 5.0 5.5 No heatsink required Voltage range V Continuous operation, 12V input types 10.8 12.0 13.2 Internal SMD construction Reected ripple voltage BW=DC to 20MHz, all output types 200 mV Fully encapsulated with toroidal magnetics OUTPUT CHARACTERISTICS No external components required Parameter Conditions Min. Typ. Max. Units PCB mounting Rated Power TA= 0C to 70C 5.0 W Voltage Set Point Accuracy See tolerance envelope Line regulation High VIN to low VIN 1.1 %/% DESCRIPTION 10% load to rated load, 5V output types 7 12 The NMXU series of DC/DC converters is par- Load Regulation % 10% load to rated load, 12V & 15V output types 5 7.5 ticularly suited to isolating and/or converting DC Ripple and Noise BW=DC to 20MHz, all output types 125 mV p-p power rails. The galvanic isolation allows the device to be congured to provide an isolated ABSOLUTE MAXIMUM RATINGS negative rail in systems where only positive rails 2 Short-circuit protection 1 second exist. The devices are particularly suited for use in distributed power systems where there is low Lead temperature 1.5mm from case for 10 seconds 300C variation in the bus voltage levels. Input voltage VIN, NMXU05 types 7V Input voltage VIN, NMXU12 types 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 specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support KDC NMXU.F01 Page 1 of 3Typical Load Line NMXU Series Isolated 5W Single & Dual Output DC/DC Converters ISOLATION CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Isolation test voltage Flash tested for 1 second 1000 VDC Resistance Viso= 1000VDC 1 G GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Switching frequency All input types 70 kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Specication All output types 0 70 Storage -55 100 C 5V output types 30 Case temperature rise above ambient All other output types 20 Cooling Free air convection TOLERANCE ENVELOPE RoHS COMPLIANCE INFORMATION +10% +5% +2.5% This series is compatible with RoHS soldering V systems with a peak wave solder temperature of NOM -2.5% 300C for 10 seconds. The pin termination nish on this product series is Matte Tin over Nickel -7.5% Preplate. The series is backward compatible with Sn/Pb soldering systems. 75 100 10 25 50 Output Load Current (%) 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 specied 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 specic 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 materi- als, 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 specied 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.F01 Page 2 of 3 Output Voltage