NXE2 Series www.murata-ps.com Isolated 2W Single Output SM DC/DC Converters SELECTION GUIDE 1 Order Code MIL. Tel. V V mA mA % % mVp-p mVp-p % % pF kHrs NXE2S0505MC 5 5 542 400 9 12 55 85 68.5 72 2.1 1853 18868 FEATURES NXE2S1205MC 12 5 220 400 11 12 50 85 74.5 77 2.1 1800 46838 Patents pending NXE2S1212MC 12 12 210 167 7 8.5 25 55 74.5 76.5 2.1 1848 22472 Lower Prole NXE2S1215MC 12 15 205 133 8.5 11 30 60 76 79 2.1 1631 58568 UL60950 Recognition pending INPUT CHARACTERISTICS ANSI/AAMI ES60601-1 Recognition Parameter Conditions Min. Typ. Max. Units pending Continuous operation, 5V input types 4.5 5 5.5 Voltage range V Continuous operation, 12V input types 10.8 12 13.2 3kVDC Isolation Hi Pot Test NXE2S0505MC 4 Substrate Embedded Transformer Input reected ripple NXE2S1205MC 2.5 mA p-p Automated Manufacture current NXE2S1212MC 3.3 NXE2S1215MC 2.8 Industry Standard Footprint ISOLATION CHARACTERISTICS 3 Short Circuit Protection Parameter Conditions Min. Typ. Max. Units Production tested for 1 second 3000 Halogen Free Isolation voltage VDC Qualication tested for 1 minute 3000 Resistance Viso= 1000VDC 10 G PRODUCT OVERVIEW GENERAL CHARACTERISTICS The NXE2 series is a new range of low cost, lower Parameter Conditions Min. Typ. Max. Units prole, fully automated manufacture surface NXE2S0505MC 130 mount DC/DC converters. The NXE2 series NXE2S1205MC 100 automated manufacturing process with substrate Switching frequency kHz NXE2S1212MC 115 embedded transformer, offers increased product NXE2S1215MC 100 reliability and repeatability of performance in a OUTPUT CHARACTERISTICS halogen free, iLGA inspectable package. The NXE2 Parameter Conditions Min. Typ. Max. Units series, industry standard footprint is compatible Rated power TA=-40C to 85C 2.0 W with existing designs. Voltage set point accuracy See tolerance envelopes High VIN to low VIN, All other variants 1.15 1.2 The NXE2 series has a MSL rating 2, and is com- 4 Line regulation %/% High VIN to low VIN ,1205 variant 1.15 1.26 patible with a peak reow solder temperature of 245 C as per J-STD-020 and J-STD-075. TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Specication See derating graphs -40 85 Storage -50 125 NXE2S0505MC 36 C NXE2S1205MC 32 Case temperature rise above ambient NXE2S1212MC 28 NXE2S1215MC 27 Cooling Free air convection ABSOLUTE MAXIMUM RATINGS Input voltage VIN, NXE2S05 types 7V Input voltage VIN, NXE2S12 types 15V 1. Components are supplied in tape and reel packaging, please refer to package specication section. Orderable part numbers are NXE2S0505MC-R7 (180 pieces per reel), or NXE2S0505MC-R13 (800 pieces per reel). 2. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load. 3. Please refer to short circuit application notes. For full details go to 4. NXE2S1205MC line regulation may increase to 2.15 %/% at the operating temperature limits. www.murata-ps.com/rohs All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied. www.murata-ps.com All enquiries: www.murata-ps.com/support KDC NXE2.A04 Page 1 of 9 Nominal Input Voltage Output Voltage Input Current Output Current Load Regulation (Typ) Load Regulation (Max) Output Ripple & Noise (Typ) Output Ripple & Noise (Max) Efciency (Min) Efciency (Typ) Isolation Capacitance 2 MTTFNXE2 Series Isolated 2W Single Output SM 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 specied time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. Murata Power Solutions NXE2 series of DC/DC converters are all 100% production tested at 3kVDC for 1 second and have been qualication tested at 3kVDC for 1 minute. A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation When the insulation in the NXE2 series is not used as a safety barrier , i.e. provides functional isolation only, continuous or switched voltages across the barrier up to 3kV are sustainable. Long term reliability testing at these voltages continues. Peak Inception voltages measured were in excess of 3.5kV when testing for partial discharge in accordance with IEC 60270. Please contact Murata for further information. The NXE2 series is pending recognition by Underwriters Laboratory. 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 NXE2 series has a PCB embedded isolated transformer, using FR4 as an insolation barrier between primary and secondary windings. While parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the FR4 insulation properties. Any material, including FR4 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 should be reduced by 20% from specied test voltage. This consideration equally applies to agency recognized parts rated for better than functional isolation where the insulation is always supplemented by a further insulation system of physical spacing or barriers. SAFETY APPROVAL ANSI/AAMI ES60601-1 The NXE2 series is pending recognition ANSI/AAMI ES60601-1. UL 60950 The NXE2 series is pending recognition by Underwriters Laboratory (UL) to UL 60950. FUSING The NXE2 Series of converters are not internally fused so to meet the requirements of UL an anti-surge input line fuse should always be used with ratings as dened below. Input Voltage, 5V 1A Input Voltage, 12V 400mA All fuses should be UL recognized, V rated. CHARACTERISATION TEST METHODS Ripple & Noise Characterisation Method Ripple and noise measurements are performed with the following test conguration. C1 1F X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter 10F 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 100m at 100 kHz C3 100nF multilayer ceramic capacitor, general purpose R1 450 resistor, carbon lm, 1% tolerance R2 50 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 specied values. Differential Mode Noise Test Schematic DC/DC Converter OSCILLOSCOPE R2 C1 C2 C3 R1 T1 Y INPUT + + SUPPLY Input Output - - R LOAD www.murata-ps.com All enquiries: www.murata-ps.com/support KDC NXE2.A04 Page 2 of 9