MER1 Series www.murata-ps.com 1kVDC Isolated 1W Single Output DC/DC Converters Industry standard pinout 1kVDC isolation 5V, 12V, 15V, 24V, & 48V inputs 5V, 9V, 12V, & 15V output Fully encapsulated with toroidal magnetics No external components required 15 11 9 9 11 9 9 7 10 8 7 7 15 10 9 9 19 14 12 11 mVp-p 25 20 17 17 20 17 17 17 20 17 15 15 25 20 20 20 30 25 25 25 % % pF kHrs 82 84 85 86 82 84 86 85 81 83 84 86 81 83 84 84 77 80 79 80 84 87 87 87.5 84 86.5 88.5 88 83.5 86.5 87.5 89 84 86.5 87.5 87.5 79.5 83 82.5 83 50 55 53 54 49 66 91 78 43 68 75 107 52 75 91 101 47 76 88 103 Efficiency (Min.) 6.5 5 5.2 5 5 3.4 3.4 2.7 4.5 2.8 2.7 2.8 3.7 2.5 2.4 2.3 3.9 2.8 2.4 2.4 % 5.5 4.2 4.6 4.4 4.5 3 3 2.4 3.8 2.4 2.3 2.4 3.1 2.1 1.8 1.7 3.4 2.4 2.0 1.9 Ripple & Noise (Max)1 Load Regulation (Typ) Output Current 233 226 227 225 97 95 93 94 79 77 76 75 50 48 48 48 26 25 25 25 MTTF2 No heatsink required mA 200 111 84 67 200 111 84 67 200 111 84 67 200 111 84 67 200 111 84 67 Isolation Capacitance UL 94V-0 package material mA 5 9 12 15 5 9 12 15 5 9 12 15 5 9 12 15 5 9 12 15 Efficiency (Typ.) Wide temperature performance at full load, –40°C to 85°C V 5 5 5 5 12 12 12 12 15 15 15 15 24 24 24 24 48 48 48 48 Ripple & Noise (Typ)1 Typical efficiency to 89% V Load Regulation (Max) RoHS compliant Output Voltage FEATURES MER1S0505SC MER1S0509SC MER1S0512SC MER1S0515SC MER1S1205SC MER1S1209SC MER1S1212SC MER1S1215SC MER1S1505SC MER1S1509SC MER1S1512SC MER1S1515SC MER1S2405SC MER1S2409SC MER1S2412SC MER1S2415SC MER1S4805SC MER1S4809SC MER1S4812SC MER1S4815SC Nominal Input Voltage Order Code Input Current at Rated Load SELECTION GUIDE No electrolytic or tantalum capacitors UL 60950 recognition pending INPUT CHARACTERISTICS Parameter PRODUCT OVERVIEW The MER1 series is the new high performance version of our 1W NMR series. The MER1 series is more efficient and offers improved regulation performance for applications where a wide output voltage variation can not be tolerated. They are ideally suited for providing local supplies on control system boards with the added benefit of 1kVDC galvanic isolation to reduce switching noise. Voltage Range Reflected Ripple Current Conditions Min. Typ. Max. Continuous operation, 5V input types Continuous operation, 12V input types Continuous operation, 15V input types Continuous operation, 24V input types Continuous operation, 48V input types 5V input types 12V input types 15V input types 24V input types 48V input types 4.5 10.8 13.5 22.6 43.2 5 12 15 24 48 7 4 4 8 25 5.5 13.2 16.5 26.4 52.8 15 12 12 20 40 Units V mA p-p ABSOLUTE MAXIMUM RATINGS Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, 5Vin types Input voltage VIN, 12Vin types Input voltage VIN, 15Vin types Input voltage VIN, 24Vin types Input voltage VIN, 48Vin types 260°C 7V 15V 18V 28V 54V 1. See Ripple & Noise characterisation method. 2. Calculated using MIL-HDBK-217F FN2 with nominal input voltage at full load. 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 Technical enquiries email: [email protected], tel: +44 (0)1908 615232 2009/09/15 KDC_MER1.A01 Page 1 of 6 MER1 Series 1kVDC Isolated 1W Single Output DC/DC Converters OUTPUT CHARACTERISTICS Parameter Conditions Rated Power Voltage Set Point Accuracy Line regulation TA=-40°C to 85°C See tolerance envelope High VIN to low VIN Min. Typ. Max. Units 1 W 1.05 1.1 %/% Typ. Max. Units ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso= 1000VDC 1000 10 Parameter Conditions Min. Switching frequency 5V & 48V input types 12V & 15V input types 24V input types VDC GΩ GENERAL CHARACTERISTICS Typ. Max. 62 75 82 Units kHz TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification Storage All output types -40 -50 Case Temperature rise above ambient Cooling Typ. 5V, 12V, & 15V input types 24V & 48V input types Free air convection TEMPERATURE DERATING GRAPH Max. Units 85 125 15 20 °C OUTPUT VOLTAGE TOLERANCE ENVELOPE 5% Output Voltage Output Power (W) 1.5 85°C 1.0 0.5 2% VNOM 10 0 -40 100 50 0 Ambient Temperature (°C) 150 0% 25 50 75 -4% 100 Output Load Current (%) The voltage tolerance envelope shows typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to changes in output loading. RoHS COMPLIANT INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260°C for 10 seconds. The pin termination finish on the SIP package type is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. They are backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: [email protected], tel: +44 (0)1908 615232 2009/09/15 KDC_MER1.A01 Page 2 of 6 MER1 Series 1kVDC Isolated 1W Single Output DC/DC Converters APPLICATION NOTES Minimum load 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 and 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. MER1S0505SC MER1S0509SC MER1S0512SC MER1S0515SC MER1S1205SC MER1S1209SC MER1S1212SC MER1S1215SC MER1S1505SC MER1S1509SC Start-up time μs 600 1730 3780 6700 750 2605 3754 5280 704 1859 MER1S1512SC MER1S1515SC MER1S2405SC MER1S2409SC MER1S2412SC MER1S2415SC MER1S4805SC MER1S4809SC MER1S4812SC MER1S4815SC Start-up time μs 3375 5090 431 245 1634 2682 512 1432 2528 3884 Typical Start-Up Wave Form 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 Technical enquiries email: [email protected], tel: +44 (0)1908 615232 2009/09/15 KDC_MER1.A01 Page 3 of 6 MER1 Series 1kVDC Isolated 1W Single Output DC/DC Converters APPLICATION NOTES (continued) 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. L Power Source MER1S0505SC MER1S0509SC MER1S0512SC MER1S0515SC MER1S1205SC MER1S1209SC MER1S1212SC MER1S1215SC MER1S1505SC MER1S1509SC MER1S1512SC MER1S1515SC MER1S2405SC MER1S2409SC MER1S2412SC MER1S2415SC MER1S4805SC MER1S4809SC MER1S4812SC MER1S4815SC L, μH 10 22 47 47 10 22 47 47 10 22 47 47 10 22 47 47 10 22 47 47 Inductor SMD 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C 82103C 82223C 82473C 82473C DC C Load DC Through Hole 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C 11R103C 11R223C 11R473C 11R473C Capacitor C, μF 4.7 2.2 1 1 4.7 2.2 1 1 4.7 2.2 1 1 4.7 2.2 1 1 4.7 2.2 1 1 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 MER1 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 MER1 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 MER1 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 Technical enquiries email: [email protected], tel: +44 (0)1908 615232 2009/09/15 KDC_MER1.A01 Page 4 of 6 MER1 Series 1kVDC Isolated 1W Single Output DC/DC Converters EFFICIENCY VS LOAD MER1S05XXSC MER1S12XXSC 90 90 80 70 5V 60 9V 12V 15V 50 70 Efficiency (%) Efficiency (%) 80 40 15V 40 30 20 20 10 10 0 0 0 10 20 30 40 50 60 Load (%) 70 80 90 0 100 10 20 30 40 50 60 70 80 90 100 70 80 90 100 Load (%) MER1S15XXSC MER1S24XXSC 90 90 80 80 5V 60 9V 12V 50 15V 40 60 30 20 10 10 0 20 30 40 50 60 70 80 90 100 12V 40 20 10 9V 50 30 0 5V 70 Efficiency (%) 70 Efficiency (%) 12V 50 30 0 5V 9V 60 15V 0 10 20 30 40 50 60 Load (%) Load (%) MER1S48XXSC 90 80 Efficiency (%) 70 5V 60 9V 50 40 12V 30 15V 20 10 0 0 10 20 30 40 50 60 70 80 90 100 Load (%) www.murata-ps.com Technical enquiries email: [email protected], tel: +44 (0)1908 615232 2009/09/15 KDC_MER1.A01 Page 5 of 6 MER1 Series 1kVDC Isolated 1W Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS 0.774 (19.65) (Max.) )0-&4 0.242 (6.15) Max. † 0.4 (10.15) Max. MER1S0505SC XYYWWi 1 0.181 (4.60) 0.141 (3.60) 2 4 0.0016 (0.4) Min. 6 0.1 (2.54) Unless otherwise stated all dimensions in inches (mm) ±0.5mm. 0.074±0.02 (1.88±0.50) TUBE OUTLINE DIMENSIONS 0.0118 (0.30) 0.0079 (0.20) 0.05 (1.25) 0.5 (12.70) 1 2 4 6 Function +VIN -VIN -VOUT +VOUT Pin PIN CONNECTIONS Unless otherwise stated, 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. † 48V input variants: 0.301 (7.65). Weight: 48Vin types: 2.75g (Typ.), all other types: 2.25g (Typ.) Unless otherwise stated all dimensions in inches (mm) ±0.5mm. Tube length : 20.47 (520mm ±2mm). Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED www.murata-ps.com/locations Tube Quantity : 25 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. © 2009 Murata Power Solutions, Inc. Technical enquiries email: [email protected], tel: +44 (0)1908 615232 2009/09/15 KDC_MER1.A01 Page 6 of 6