CRE1 Series www.murata-ps.com Isolated 1W Single Output Isolated DC/DC Converters 200 200 67 200 83 200 83 Industry Standard Pinout CRE1S0305S3C CRE1S0505S3C 3.3 5 5 5 200 200 3.3V, 5V, 12V & 24V Inputs INPUT CHARACTERISTICS 5V, 12V & 15V outputs Parameter UL 60950 recognition pending Single Isolated output 1kVDC or 3kVDC option ‘Hi Pot Test’ Wide temperature performance at full 1W load -40°C to 85°C2 Pin Compatible with CME, CRL2, LME, MEE1, MEE3, NKE, NME, & NML series Voltage range PRODUCT OVERVIEW Reflected ripple current The CRE1 series are a cost effective 1W DC/DC converter series, in industry standard packages with industry standard pinout. Popular input and output voltages are available. The galvanic isolation allows the device to be configured to provide an isolated negative rail in systems where only positive rails exist. The wide temperature range guarantees startup from –40°C and full 1 watt output at 85°C2. 12 14 16 40 12 14 16 40 6 7.5 10 25 8 10 12 30 4 5 8 20 8.5 10 13 30 3 4 10 25 3KVDC isolation options 10 12 15 25 6 8 15 25 MTTF1 5 5 15 5 12 5 12 Isolation Capacitance 5 5 5 12 12 24 24 Efficiency CRE1S0505DC CRE1S0505SC CRE1S0515SC CRE1S1205SC CRE1S1212SC CRE1S2405SC CRE1S2412SC FEATURES % mV p-p Typ. Max. Typ. Max. Input Current at Rated Load mA Ripple & Noise Output Current V Load Regulation Output Voltage V Order Code2 Nominal Input Voltage SELECTION GUIDE mA % Min. Typ. pF MIL. Tel. kHrs 286 286 250 117 104 58 52 67 67 77 68 75 67 75 70 70 80 71 80 71 80 30 30 40 33 55 40 78 400 250 72 73 75 77 35 24 Conditions Min. Typ. Max. Continuous operation, 3.3V input types Continuous operation, 5V input types Continuous operation, 12V input types Continuous operation, 24V input types 3.3V & 12V input types 5V & 24V input types 2.97 4.5 10.8 21.6 3.3 5.0 12 24 1 2 3.63 5.5 13.2 26.4 15 15 Units Typ. Max. Units 1 W 1.2 %/% Max. Units V mA p-p OUTPUT CHARACTERISTICS Parameter Conditions Min. Rated Power TA=-40°C to 85°C2 Voltage Set Point Accuracy See tolerance envelope Line regulation High VIN to low VIN 1.1 ISOLATION CHARACTERISTICS Parameter Isolation test voltage Resistance Conditions Min. C Versions Flash tested for 1 second 3C Versions Flash tested for 1 second Viso= 1000VDC 1000 3000 Typ. VDC 10 GΩ GENERAL CHARACTERISTICS Parameter Conditions Switching frequency 3.3V input types 5V input types 12V input types 24V input types Min. Typ. Max. 115 110 145 100 Units kHz ABSOLUTE MAXIMUM RATINGS Lead temperature 1.5mm from case for 10 seconds Input voltage VIN, 3.3V input Input voltage VIN, 5V input Input voltage VIN, 12V input Input voltage VIN, 24V input For full details go to www.murata-ps.com/rohs 260°C 5.5V 7V 15V 28V 1. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load. 2. 24V input parts operating temperature range is currently 0°C to 70°C, parts are being upgraded to -40°C to 85°C operating temperature range. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. www.murata-ps.com/support KDC_CRE1.A01 Page 1 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Specification 24V Input types2 All other inputs types 0 -40 -50 Storage Case temperature rise above ambient Cooling 5V output types All other output types Free air convection Typ. Max. Units 70 85 130 41 32 °C 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 CRE1 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1kVDC for 1 second for C versions and 3kVDC for 1 second for 3C versions. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” The CRE1 is pending recognition by Underwriters Laboratory for functional insulation, 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 CRE1 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. SAFETY APPROVAL The CRE1 series is pending recognition by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum still air ambient temperature of 85°C and/or case temperature limit (case temperature measured on the face opposite the pins). RoHS COMPLIANCE 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. The DIP types are Matte Tin over Nickel Preplate. Both types in this series are backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs TEMPERATURE DERATING GRAPH 70°C 1.0 Output Power (W) Output Power (W) TEMPERATURE DERATING GRAPH2 Safe Operating Area 0 -40 100 50 0 Ambient Temperature (°C) 150 1.0 85°C Safe Operating Area 0 -40 100 50 0 Ambient Temperature (°C) 150 www.murata-ps.com/support KDC_CRE1.A01 Page 2 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters EFFICIENCY VS LOAD 3.3V Inputs 5V Inputs 90 90 80 70 70 60 60 Efficiency (%) Efficiency (%) 80 50 CRE1S0305S3C 40 CRE1S0505S3C 50 CRE1S0505SXC 40 CRE1S0515SC 30 30 20 20 10 10 0 0 0 10 20 30 40 50 60 70 80 90 0 100 10 20 30 40 50 60 70 80 90 100 Load (%) Load (%) 12V Inputs 24V Inputs 90 90 80 80 70 70 60 50 CRE1S1205SC 40 CRE1S1212SC Efficiency (%) Efficiency (%) 60 50 CRE1S2405SC 40 CRE1S2412SC 30 30 20 20 10 10 0 0 0 10 20 30 40 50 60 Load (%) 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Load (%) www.murata-ps.com/support KDC_CRE1.A01 Page 3 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters TOLERANCE ENVELOPES 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. CRE1S0505XC CRE1S0515SC 10% 7% 0% Output Voltage Output Voltage 6% 3% 0% -3% -6% 10 25 50 75 100 10 25 CRE1S1205SC 75 100 CRE1S1212SC 5% Output Voltage 5% Output Voltage 50 Output Load Current (%) Output Load Current (%) 2% 3% 2% -1% -2% 10 25 75 50 Output Load Current (%) -6% 100 CRE1S2405SC 10 25 75 50 Output Load Current (%) 100 CRE1S2412SC Output Voltage 5% 1% Output Voltage 8% 2% 0% -1% -3% 10 25 50 Output Load Current (%) 75 100 -4% 10 25 75 50 Output Load Current (%) 100 www.murata-ps.com/support KDC_CRE1.A01 Page 4 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters TOLERANCE ENVELOPES (continued) CRE1S0305S3C CRE1S0505S3C 9% 7% 0% Output Voltage Output Voltage 6% 3% 1% -3% -5% 10 25 50 Output Load Current (%) 75 100 10 25 50 Output Load Current (%) 100 75 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. CRE1S0505DC CRE1S0505SC CRE1S0515SC CRE1S1205SC CRE1S1212SC CRE1S2405SC CRE1S2412SC CRE1S0305S3C CRE1S0505S3C Start-up time μs 190 190 1790 125 500 135 430 295 165 Typical Start-Up Wave Form www.murata-ps.com/support KDC_CRE1.A01 Page 5 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters APPLICATION NOTES (continued) 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 R2 T1 + Y INPUT Output - R LOAD 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 DC Power Source L, μH Inductor SMD C Load DC Through Hole Capacitor C, μF CRE1S0505DC CRE1S0505SC CRE1S0515SC CRE1S1205SC CRE1S1212SC CRE1S2405SC CRE1S2412SC CRE1S0305S3C CRE1S0505S3C www.murata-ps.com/support KDC_CRE1.A01 Page 6 of 10 CRE1 Series Isolated 1W Single Output Isolated 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. The following plots show positive and negative quasi peak and CISPR22 Average Limit B (pink line) and Quasi Peak Limit B (green line) adherence limits. The recommended input capacitor to use for this circuit is 50V 16V X7R ceramic capacitor L DC C DC Inductor Part Number L, μH CRE1S0505DC CRE1S0505SC CRE1S0515SC CRE1S1205SC CRE1S1212SC CRE1S2405SC CRE1S2412SC CRE1S0305S3C CRE1S0505S3C 4.7 4.7 4.7 10 10 22 22 10 10 SMD Capacitor Through Hole C, μF 13R472C 13R472C 13R472C 13R103C 13R103C 13R223C 13R223C 13R103C 13R103C 4.7 4.7 4.7 1 1 10 10 1 1 80 70 70 60 60 50 50 dBuV 80 40 40 30 30 20 20 10 10 0 1.00E+05 dBuV CRE1S0515SC 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 1.00E+07 Frequency (Hz) CRE1S1205SC CRE1S1212SC 80 80 70 70 60 60 50 50 40 30 20 20 10 10 1.00E+06 1.00E+07 Frequency (Hz) 1.00E+08 1.00E+08 40 30 0 1.00E+05 1.00E+06 Frequency (Hz) dBuV dBuV CRE1S0505XC 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) www.murata-ps.com/support KDC_CRE1.A01 Page 7 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters EMC FILTERING AND SPECTRA CRE1S2412SC 80 80 70 70 60 60 50 50 dBuV dBuV CRE1S2405SC 40 40 30 30 20 20 10 10 0 1.00E+05 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 80 80 70 70 60 60 50 50 40 40 30 30 20 20 10 10 1.00E+07 Frequency (Hz) 1.00E+08 CRE1S0505S3C dBuV dBuV CRE1S0305S3C 1.00E+06 1.00E+07 Frequency (Hz) Frequency (Hz) 0 1.00E+05 1.00E+06 1.00E+08 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) www.murata-ps.com/support KDC_CRE1.A01 Page 8 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters PACKAGE SPECIFICATIONS SC Package DC Package 3C Package 11.53±0.2 [0.454±0.008] 10.00±0.25 [0.394±0.010] 7.46±0.25 [0.294±0.010] 1 2 3 S S 4.10±0.5 [0.161±0.020] 4.10±0.5 [0.161±0.020] 0.40 [0.016] MIN 0.40 [0.016] MIN 11.53±0.2 [0.454±0.008] 1 2 3 4 4 2.54 [0.100] 2.54 [0.100] 0.50±0.05 [0.020±0.002] 0.50±0.05 [0.020±0.002] 2.13±0.8 [0.084±0.031] 0.25±0.05 [0.010±0.002] 2.38±1 [0.094±0.039] 6.10 +0.15 -0.20 1.32±0.45 [0.052±0.018] S 1.34±0.3 [0.053±0.012] -0.008 ] [0.240 +0.006 S 0.25±0.05 [0.010±0.002] 6.10 +0.15 -0.25 -0.010 ] [0.240 +0.006 All dimensions in mm (inches) Controlling dimension is mm. All pins on a 2.54 (0.100) pitch and within ±0.1 (0.004) of true position from pin 1 at seating plane ‘S’ (SC&3C) All pins on a 2.54 (0.100) pitch and within ±0.25 (0.010) of true position (DC) PIN CONNECTIONS - 4 PIN SIP Weight: 1.09g (3C) 1.30g (SC) 1.38g (DC) PIN CONNECTIONS - 8 PIN DIP PIN CONNECTIONS - 4 PIN 3C Function Pin Function Pin 1 -VIN 1 -VIN 1 -VIN 2 +VIN 4 +VIN 2 +VIN 3 -VOUT 5 +VOUT 3 -VOUT +VOUT 7 -VOUT 4 +VOUT Pin 4 Function www.murata-ps.com/support KDC_CRE1.A01 Page 9 of 10 CRE1 Series Isolated 1W Single Output Isolated DC/DC Converters PACKAGE SPECIFICATIONS (continued) RECOMMENDED FOOTPRINT DETAILS DC SC/3C 2.54 [0.100] x4 HOLES Ø 0.045 0.039 Ø 1.15 1.00 [ ] 2.54 [0.100] TUBE OUTLINE DIMENSIONS DC Tube 3C Tube SC Tube 12.0 [0.472] 9.3 [0.366] 7.7 [0.303] 9.3 [0.366] 12.43 [0.489] 14.5 [0.571] 14.8 [0.583] 18.0 [0.709] 5.07±0.80 [0.200±0.03] 5.05 [0.199] Unless otherwise specified all dimensions in mm [inches] ±0.55mm [0.022]. Tube Length (DC&SC) : 520mm [20.472] ±2.0 [0.079] Tube Length (3C) : 525mm [20.669] ±2.0 [0.079]. Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 5.0 [0.197] 4.45 [0.175] Tube Quantity (DC & SC): 35 (3C):40 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. © 2016 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_CRE1.A01 Page 10 of 10