CRR1 Series www.murata-ps.com Isolated 1W Single Output DC/DC Converter SELECTION GUIDE Order Code MIL. Tel. V V mA % mVp-p % pF kHrs CRR1S0505SC 5 5 200 290 12 14 6 10 67 69 28 1847 FEATURES UL 60950 Recognised INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Wide temperature performance at full Voltage range Continuous operation 4.5 5 5.5 V 1 Watt load, 40C to 85C Reected ripple current 1.6 2 mA p-p UL 94V-0 package material OUTPUT CHARACTERISTICS Industry standard pinout Parameter Conditions Min. Typ. Max. Units 1kVDC isolation Hi Pot Test 3 Rated Power TA=-40C to 85C, See derating curve 1.0 W Voltage Set Point Accuracy See tolerance envelope 5V Input Line regulation High VIN to low VIN 1.1 1.2 %/% 5V Output ISOLATION CHARACTERISTICS Fully encapsulated with toroidal Parameter Conditions Min. Typ. Max. Units magnetics Isolation test voltage Flash tested for 1 second 1000 VDC No external components required Resistance Viso= 1000VDC 10 G No electrolytic or tantalum capacitors GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Switching frequency 110 kHz PRODUCT OVERVIEW The CRR1 series of industrial temperature range ABSOLUTE MAXIMUM RATINGS DC/DC converters is the standard building block Lead temperature 1.5mm from case for 10 seconds 260C for on-board distributed power systems. It is Input voltage VIN, 7V ideally suited for providing single rail supplies on primarily digital boards with the added benet TEMPERATURE CHARACTERISTICS of galvanic isolation to reduce switching noise. Parameter Conditions Min. Typ. Max. Units Surface mount technology and advanced packag- Specication -40 85 ing materials produce rugged reliable performance Storage -50 130 over an extended temperature range from -40C C Case Temperature above to 85C.jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj- 33 ambient jjjjjjjjjjjjjjjjj Cooling Free air convection 1. See Ripple & Noise characterisation method. 2. Calculated using MIL-HDBK-217 FN2 and Telcordia SR-332 calculation model with nominal input voltage at full load. 3. See derating graph. All specications typical at TA=25C, nominal input voltage and rated output current unless otherwise specied. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support KDC CRR1.B01 Page 1 of 6 Nominal Input Voltage Output Voltage Output Current Input Current at Rated Load Load Regulation (Typ) Load Regulation (Max) 1 Ripple & Noise (Typ) 1 Ripple & Noise (Max) Efciency (Min) Efciency (Typ) Isolation Capacitance 2 MTTFCRR1 Series Isolated 1W Single Output DC/DC Converter TEMPERATURE DERATING GRAPH TOLERANCE ENVELOPE +10% 1.5 +6% 85C 1.0 0% 0.5 Safe Operating Area 120C -6% 75 100 0 10 25 50 -40 0 50 100 150 Output Load Current (%) Ambient Temperature (C) 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. 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 CRR1 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 The CRR1 has 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 CRR1 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 specied 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 CRR1 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum still air ambient temperature of 100C as measured at any point on the case of the unit (hotspot). The CRR1 series of converter is not internally fused so to meet requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as dened below. Input Voltage, 5V: 0.5A All fuses shoud be UL regonised, 125V rated. File number E151252 applies. RoHS COMPLIANCE INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260C for 10 seconds. The pin termination nish on this product series is Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs www.murata-ps.com/support KDC CRR1.B01 Page 2 of 6 Output Power (W) Output Voltage