NXE1 Series www.murata-ps.com Isolated 1W Single Output SM DC/DC Converters Efficiency (Min) % % pF kHrs 15 55 70 63 66 3 4074 NXE1S0305MC 3.3 5 415 200 9.5 13 40 55 67 70 3 3667 NXE1S0505MC 5 5 303 200 6 8 30 45 64 67.5 3 6384 mVp-p mVp-p MTTF2 % 11.5 Output Ripple & Noise (Max) % 303 Output Ripple & Noise (Typ) Isolation Capacitance Lower Profile Load Regulation (Max) Efficiency (Typ) Patents pending Load Regulation (Typ) mA 415 Output Current mA 3.3 Input Current V 3.3 Nominal Input Voltage V NXE1S0303MC Order Code1 FEATURES Output Voltage SELECTION GUIDE UL60950 Recognition pending ANSI/AAMI ES60601-1 Recognition pending INPUT CHARACTERISTICS Parameter 3kVDC Isolation “Hi Pot Test” Voltage range Substrate Embedded Transformer Input reflected ripple current Conditions Min. Typ. Max. Continuous operation, 3.3V input types 2.97 3.3 3.63 Continuous operation, 5V input types 4.5 5.0 5.5 7.5 15 mA p-p Typ. Max. Units All variants Units V Automated Manufacture Industry Standard Footprint Short Circuit Protection3 Halogen Free ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation voltage Resistance Flash tested for 1 second Viso= 1000VDC 3000 10 VDC GΩ GENERAL CHARACTERISTICS PRODUCT OVERVIEW The NXE1 series is a new range of low cost, lower profile, fully automated manufacture surface mount DC/DC converters. The NXE1 series automated manufacturing process with substrate Embedded Transformer, offers increased product reliability and repeatability of performance in a halogen free, iLGA inspectable package. The NXE1 series, industry standard footprint is compatible with existing designs. The NXE1 series has a MSL rating 2, and is compatible with a peak reflow solder temperature of 245ÚC as per J-STD-020 and J-STD-075. Parameter Conditions Switching frequency NXE1S0303MC NXE1S0305MC NXE1S0505MC Min. Typ. Max. 75 85 120 Units kHz OUTPUT CHARACTERISTICS Parameter Conditions Rated power Voltage set point accuracy Line regulation TA=-40°C to 85°C See tolerance envelopes High VIN to low VIN Min. Typ. Max. Units 1.0 W 1.1 1.2 %/% Typ. Max. Units 85 125 °C TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage Case temperature rise above ambient Cooling All output types -40 -50 All output types Free air convection 22 ABSOLUTE MAXIMUM RATINGS Input voltage VIN, NXE1S03 types Input voltage VIN, NXE1S05 types For full details go to www.murata-ps.com/rohs www.murata-ps.com 5.5V 7V 1. Components are supplied in tape and reel packaging, please refer to package specification 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. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 1 of 8 NXE1 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 specified 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 specific 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 specified 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 reflow sensitivity classification of MSL2 PSL R7F as defined in J-STD-020 and J-STD-075. This translates to: MSL2 = 1 year floor life, PSL R7F = Peak reflow temperature 245°C with a limitation on the time above liquidus (217°C) which for this series is 90sec max. The pin termination finish 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 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 All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 2 of 8 NXE1 Series Isolated 1W Single Output SM DC/DC Converters TOLERANCE ENVELOPES The voltage tolerance envelopes show typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to changes in output loading and set point accuracy. NXE1S0303MC NXE1S0305MC +9.2% -1.5% -5.4% 10 25 75 50 Output Load Current (%) -13.4% 100 Output Voltage Output Voltage +5.5% +3.9% +0.3% -5.8% 10 25 75 50 Output Load Current (%) 100 NXE1S0505MC Output Voltage +10% +5% +1.5% -3.5% 10 25 75 50 Output Load Current (%) www.murata-ps.com 100 All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 3 of 8 NXE1 Series Isolated 1W Single Output SM DC/DC Converters EFFICIENCY VS LOAD NXE1S0305MC 80 70 70 60 60 50 50 Efficiency (%) Efficiency (%) NXE1S0303MC 80 40 30 40 30 20 20 10 10 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Load (%) Load (%) NXE1S0505MC 80 70 Efficiency (%) 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 Load (%) TEMPERATURE DERATING GRAPH Output Power (W) 1.5 85°C 1.0 0.5 0 -40 Safe Operating Area 100 50 0 Ambient Temperature (°C) www.murata-ps.com 150 All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 4 of 8 NXE1 Series Isolated 1W Single Output SM DC/DC Converters APPLICATION NOTES Short Circuit Performance NXE1 series offers short circuit protection which is continious with nominal input voltage at low ambient temperatures. At higher ambient temperatures of 65 °C and above short circuit duration will be limited. Advisory Notes Minimum Load The NXE1 series is not hermetically sealed, customers should ensure that parts are fully dried before input power application. 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 & 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. Typical Start-Up Wave Form NXE1S0303MC NXE1S0305MC NXE1S0505MC Start-up time μS 150 400 250 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. NXE1S0303MC NXE1S0305MC NXE1S0505MC L, μH 15 22 22 www.murata-ps.com Inductor SMD 82153C 82223C 82223C Through Hole 11R153C 11R223C 11R223C Capacitor C, μF 10 4.7 4.7 L Power Source DC C Load DC All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 5 of 8 NXE1 Series Isolated 1W Single Output SM DC/DC Converters EMC FILTERING AND SPECTRA FILTERING The following table shows the additional input capacitor and input inductor typically required to meet EN 55022 Curve B Quasi-Peak EMC limit, as shown in the following plots. Part Number Capacitor Inductor NXE1S0303MC NXE1S0305MC NXE1S0505MC 4.7μF 4.7μF 3.3μF 15μH 15μH 15μH NXE1S0303MC 100 90 80 70 dBuV 60 50 40 30 20 10 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) NXE1S0305MC 100 90 80 70 dBuV 60 50 40 30 20 10 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) NXE1S0505MC 100 90 80 70 dBuV 60 50 40 30 20 10 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 6 of 8 NXE1 Series Isolated 1W Single Output SM DC/DC Converters PACKAGE SPECIFICATIONS Mechanical Dimensions Pin Connections 12.70 [0.500] (7.62 [0.300]) SMA PICKUP POINT Pin Function 1 3 7 8 14 -Vin +Vin -Vout +Vout NA NA - Not available for electrical connection. 4.36±0.35 [0 .172±0.014] S SEATING PLANE SMA PICKUP POINT (TOP OF PCB) 3.11±0.19 [0.122±0.007] x5 PLACES 1.52 [0.060] 0.1 (0.004) 2.54 [0.100] 1 3 S x5 PINS 7 10.41 [0.410] 14 8 x 5 PLACES 0.61 [0.024] 7.62 [0.300] 2.54 [0.100] All dimensions in mm(inches), Controlling dimension is mm. Tolerances (unless otherwise stated) ±0.10(0.004). Weight: 1g Recommended Footprint Details 7.62 [0.300] x5 PLACES 2.30 [0.091] 9.40 [0.370] RECOMMENDED ISOLATION BARRIER x5 PLACES 1.00 [0.039] www.murata-ps.com 2.54 [0.100] All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 7 of 8 NXE1 Series Isolated 1W Single Output SM DC/DC Converters TAPE & REEL SPECIFICATIONS REEL OUTLINE DIMENSIONS REEL PACKAGING DETAILS Ø332 [13.071] MAX OR Ø180 [7.087] MAX [ +0.020 Ø13.0+0.5 -0.2 Ø0.512 -0.008 ] GOODS ENCLOSURE SECTION LEADER SECTION 400 [15.748] MIN 30.40 [1.197] MAX # TRAILER SECTION 160 [6.299] MIN 100 [3.937] MIN 1.50 [0.059] MIN ## Ø20.20 [Ø0.795] MIN Carrier tape pockets shown are illustrative only - Refer to carrier tape diagram for actual pocket details. Tape & Reel specifications shall conform with current EIA-481 standard Unless otherwise stated all dimensions in mm(inches) Controlling dimension is mm # Measured at hub ## Six equi-spaced slots on 180mm/7” reel Reel Quantity: 7” - 180 or 13” - 800 TAPE OUTLINE DIMENSIONS 1.75 [0.069] 4.0 [0.157] 2.0 [0.079] Ø1.5 [Ø0.059] MIN [ +0.004 +0.1 Ø1.5 -0.0 Ø0.059 -0.000 ] 3° MAX 11.5 [0.453] 13.3 [0.524]# 24.3 [0.957] MAX COVER TAPE 22.25 [0.876] MIN 11.0 [0.433]# 0.6 0.024 ] MAX ] 3° MAX 5.0 [0.197] 16.0 [0.630] DIRECTION OF UNREELING Tape & Reel specifications shall conform with current EIA-481 standard Unless otherwise stated all dimensions in mm(inches) ±0.1mm (±0.004 Inches) Controlling dimension is mm Components shall be orientated within the carrier tape as indicated # Measured on a plane 0.3mm above the bottom pocket Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED www.murata-ps.com/support 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. © 2015 Murata Power Solutions, Inc. All enquiries: www.murata-ps.com/support KDC_NXE1.D01 Page 8 of 8