NXE1 Series www.murata-ps.com Isolated 1W Single Output SM DC/DC Converters SELECTION GUIDE 1 Order Code V V mA mA % % mVp-p mVp-p % % pF kHrs FEATURES NXE1S0303MC 3.3 3.3 415 303 11.5 15 55 70 63 66 3 4074 Patents pending NXE1S0305MC 3.3 5 415 200 9.5 13 40 55 67 70 3 3667 Lower Prole NXE1S0505MC 5 5 303 200 6 8 30 45 64 67.5 3 6384 UL60950 Recognition pending INPUT CHARACTERISTICS ANSI/AAMI ES60601-1 Recognition Parameter Conditions Min. Typ. Max. Units pending Continuous operation, 3.3V input types 2.97 3.3 3.63 Voltage range V 3kVDC Isolation Hi Pot Test Continuous operation, 5V input types 4.5 5.0 5.5 Input reected ripple Substrate Embedded Transformer All variants 7.5 15 mA p-p current Automated Manufacture ISOLATION CHARACTERISTICS Industry Standard Footprint Parameter Conditions Min. Typ. Max. Units 3 Isolation voltage Flash tested for 1 second 3000 VDC Short Circuit Protection Resistance Viso= 1000VDC 10 G Halogen Free GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units PRODUCT OVERVIEW NXE1S0303MC 75 The NXE1 series is a new range of low cost, lower Switching frequency NXE1S0305MC 85 kHz prole, fully automated manufacture surface NXE1S0505MC 120 mount DC/DC converters. The NXE1 series automated manufacturing process with substrate OUTPUT CHARACTERISTICS Embedded Transformer, offers increased product Parameter Conditions Min. Typ. Max. Units reliability and repeatability of performance in a Rated power TA=-40C to 85C 1.0 W halogen free, iLGA inspectable package. The NXE1 Voltage set point accuracy See tolerance envelopes series, industry standard footprint is compatible Line regulation High VIN to low VIN 1.1 1.2 %/% with existing designs. TEMPERATURE CHARACTERISTICS The NXE1 series has a MSL rating 2, and is com- Parameter Conditions Min. Typ. Max. Units patible with a peak reow solder temperature of Specication All output types -40 85 245 C as per J-STD-020 and J-STD-075. Storage -50 125 C Case temperature rise above ambient All output types 22 Cooling Free air convection ABSOLUTE MAXIMUM RATINGS Input voltage VIN, NXE1S03 types 5.5V Input voltage VIN, NXE1S05 types 7V 1. Components are supplied in tape and reel packaging, please refer to package specication section. Orderable part numbers are NXE1S0505MC-R7 (180 pieces per reel), or NXE1S0505MC-R13 (800 pieces per reel). 2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load. 3. Please refer to short circuit application notes. For full details go to All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied. www.murata-ps.com/rohs www.murata-ps.com All enquiries: www.murata-ps.com/support KDC NXE1.D01 Page 1 of 8 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 MTTFNXE1 Series Isolated 1W 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 NXE1 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 3kVDC 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 NXE1 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 NXE1 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. RoHS COMPLIANCE, MSL AND PSL INFORMATION This series is compatible with Pb-Free soldering systems and is also backward compatible with Sn/Pb soldering systems. The NXE1 series has a process, moisture, and reow sensitivity classication of MSL2 PSL R7F as dened in J-STD-020 and J-STD-075. This translates to: MSL2 = 1 year oor life, PSL R7F = Peak reow temperature 245C with a limitation on the time above liquidus (217C) which for this series is 90sec max. The pin termination nish on this product series is Gold with a plating thickness of 0.12 microns. 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 + + Input Output SUPPLY - - R LOAD www.murata-ps.com All enquiries: www.murata-ps.com/support KDC NXE1.D01 Page 2 of 8