CRE1 Series www.murata-ps.com Isolated 1W Single Output Isolated DC-DC Converters SELECTION GUIDE % mV p-p % MIL. Tel. V V mA mA pF Typ. Max. Typ. Max. Min. Typ. kHrs CRE1S0505DC 5 5 200 12 14 16 40 286 65 70 30 CRE1S0505SC 5 5 200 12 14 16 40 286 65 70 30 CRE1S0515SC 5 15 67 6 7.5 10 25 250 77 80 40 FEATURES CRE1S1205SC 12 5 200 8 10 12 30 117 68 71 33 3 UL 60950 recognised n CRE1S1212SC 12 12 83 4 5 8 20 104 75 80 55 CRE1S2405SC 24 5 200 8.5 10 13 30 58 67 71 40 Single Isolated output n CRE1S2412SC 24 12 83 3 4 10 25 52 75 80 78 1kVDC or 3kVDC option Hi Pot Test n 3KVDC isolation options CRE1S0305S3C 3.3 5 200 10 12 15 25 400 72 75 35 Wide temperature performance at full n 4 CRE1S0505S3C 5 5 200 6 8 15 25 250 73 77 24 1W load -40C to 85C n Surface mount options Industry Standard Pinout n CRE1S0505MC 5 5 200 12.8 15 62 85 294 68 35 6857 CRE1S0505MEC 5 5 200 6.5 8 25 70 239 79 82 22 3041 3.3V, 5V, 12V & 24V Inputs n INPUT CHARACTERISTICS 5V, 12V & 15V outputs n Parameter Conditions Min. Typ. Max. Units Pin Compatible with CME, CRL2, LME, n Continuous operation, 3.3V input types 2.97 3.3 3.63 V MEE1, MEE3, MTE1, NKE, NME, NML & Continuous operation, 5V input types 4.5 5.0 5.5 Voltage range NTE series Continuous operation, 12V input types 10.8 12 13.2 Continuous operation, 24V input types 21.6 24 26.4 Through hole and surface mount options n 3.3V & 12V input types 1 15 available n 5V & 24V input types 2 15 Reflected ripple current mA p-p CRE1S0505MC 30 47 PRODUCT OVERVIEW CRE1S0505MEC 5 15 The CRE1 series are a cost effective 1W DC-DC converter series, in industry standard packages OUTPUT CHARACTERISTICS with industry standard pinout. Popular input Parameter Conditions Min. Typ. Max. Units and output voltages are available. The galvanic 3 Rated Power TA=-40C to 85C 1 W isolation allows the device to be configured to Voltage Set Point Accuracy See tolerance envelope provide an isolated negative rail in systems where Line regulation High VIN to low VIN 1.1 1.2 %/% only positive rails exist. The wide temperature range guarantees startup from 40C and full 1 ISOLATION CHARACTERISTICS 3 watt output at 85C . Parameter Conditions Min. Typ. Max. Units C Versions Flash tested for 1 second 1000 Isolation test voltage VDC 3C Versions Flash tested for 1 second 3000 Resistance Viso= 1000VDC 10 G GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units 3.3V input types 115 5V input types 110 kHz Switching frequency 12V input types 145 24V input types 100 CRE1S0505MEC 80 1. If components are required in tape and reel format suffix order code with -R, e.g. CRE1S0505MC-R. 2. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load. 3. UL 60950 recognition does not apply to CRE1S0505MC. 4. 24V input parts prior to date code D1635 have operating temperature range of 0 to 70C. For full details go to www.murata-ps.com/rohs All specifications typical at T A=25C, nominal input voltage and rated output current unless otherwise specified. www.murata-ps.com/support KDC CRE1.D02 Page 1 of 14 1 Order Code Nominal Input Voltage Output Voltage Output Current Load Regulation Ripple & Noise Input Current at Rated Load Efficiency Isolation Capacitance 2 MTTFCRE1 Series Isolated 1W Single Output Isolated DC-DC Converters ABSOLUTE MAXIMUM RATINGS Lead temperature 1.5mm from case for 10 seconds 260C Input voltage VIN, 3.3V input 5.5V Input voltage VIN, 5V input 7V Input voltage VIN, 12V input 15V Input voltage VIN, 24V input 28V TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units 1 -40 85 Specification All output types Storage -50 130 5V output types 41 C Case temperature rise above All other output types 32 ambient CRE1S0505MC 43 CRE1S0505MEC 12.5 Cooling Free air convection 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 series, through hole variants (excluding surface mount variants) have been recognised 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 enamelled 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 has been recognised by Underwriters Laboratory (UL) to UL60950 for functional insulation in a maximum still air ambient temperature of 100C for the C versions and 130C for the 3C versions as measured on the case of the unit (hotspot). The CRE1S0505MC is not currently UL recognised. The CRE1 series of converters are not internally fused so to meet the requirements of UL60950 an anti-surge input line fuse should always be used with ratings as defined belo w. CRE1S03xxS3C: 1A CRE1S05xxxxC: 0.7A CRE1S12xxSC: 0.2A CRE1S24xxSC: 0.16A All fuses should be UL recognised, 125V rated. File number E151252 applies. 1. 24V input parts prior to date code D1635 have operating temperature range of 0 to 70C. www.murata-ps.com/support KDC CRE1.D02 Page 2 of 14