NDS6 Series www.murata-ps.com Isolated 6W Wide Input Single & Dual Output DC/DC Converters SELECTION GUIDE Input Output Current Input Current Efciency Voltage Output Ripple 1 MTTF 2 Voltage & Noise Order Code Min. 100% 0% 100% Shut Nom. Min. Typ. Load Load Load Load Down V V A A mA mA mA mV p-p % % kHrs NDS6D2405C 24 5 0.06 0.6 7 300 1.1 40 80 82 NDS6D2412C 24 12 0.025 0.250 7 290 1.1 40 85 87 NDS6D2415C 24 15 0.020 0.200 7 290 1.1 45 85 87 FEATURES NDS6S2405C 24 5 0.12 1.2 4 305 1.1 40 80 82 NDS6S2412C 24 12 0.05 0.5 5.5 290 1.1 40 84 86 UL 60950 recognized NDS6S2415C 24 15 0.04 0.4 6 290 1.1 40 85 87 RoHS compliant 2:1 Wide range voltage input INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Operating temperature range Voltage range All NDS6D24 & NDS6S24 types 18 24 36 V 40C to 85C Reected ripple current All NDS6D24 & NDS6S24 types 7 mA p-p Short circuit protection OUTPUT CHARACTERISTICS 0.2% Typical load regulation Parameter Conditions Min. Typ. Max. Units 1.5kVDC Isolation Hi-Pot Test Rated power 6W Positive & negative except NDS6D2405 negative 2 24V Nominal input output Voltage set point accuracy % NDS6D2405 negative output 4 Single & dual outputs 3 Positive outputs 0.01 0.1 Power density 0.94W/cm Line regulation Low line to high line % Optional remote On/Off Negative outputs 0.02 0.2 UL 94V-0 Package materials 5V outputs 0.2 1.7 10% total load to Load regulation % No electrolytic capacitors 100% total load 12V & 15V outputs 0.2 1 Low noise 5V % voltage change on negative output 5 when positive load varies from 12.5% Cross regulation % PRODUCT OVERVIEW (0.75W) to 37.5% (2.25W) with 12V & 15V 2 negative load xed at 50% (3W) The NDS6 series of DC/DC converters offer single and dual output voltages from an input voltage range of 18-36V. The NDS6 is housed in an indus- ISOLATION CHARACTERISTICS try standard package with a standard pinout. The Parameter Conditions Min. Typ. Max. Units NDS6 is packaged in a metal case for improved Isolation test voltage Flash tested for 1 second 1500 VDC EMI shielding and is also encapsulated for supe- Resistance Viso = 1kVDC 1 G rior thermal performance. Versions with optional Capacitance 225 pF remote on/off control pin are also available. Applications include telecommunications, battery ABSOLUTE MAXIMUM RATINGS powered systems, process control and distributed Short-circuit protection Continuous power systems. Internal power dissipation 2.7W Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) 260C 3 Minimum output load for specication 10% of rated load on each output Control pin input voltage 18V Input voltage, NDS6 24V input types 40V 1 Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2 To order with optional control pin, prex C with E. For example NDS6D0505EC. 3 Operation below 10% minimum load may cause increased output ripple. 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 NDS6.E01 Page 1 of 6NDS6 Series Isolated 6W Wide Input Single & Dual Output DC/DC Converters 1 GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Switching frequency 130 kHz 3.0 V Module ON (or pin unconnected) 0mA Control pin input 0.8 V Module OFF 1.5 mA TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Operation -40 85 Storage -50 130 5V 29 C Case temperature rise above ambient 100% Load, Nom VIN, Still Air, 12V & 15V 22 Thermal shutdown Case Temperature 110 APPLICATION NOTES Control Pin NDS6D Cross Regulation This provides an OFF function, which puts the converter into a low Load regulation is at its best when the positive and negative loads are balanced. When the loads power mode, when the voltage applied to the pin is less than 0.8V. are asymmetric, the negative output is not as tightly regulated as the positive output. To meet When the pin is high or un-connected, the converter is on. datasheet specication, a minimum load of 10% of output load current is required on each output. The NDS6D can be used with much lighter loading but the negative output voltage may rise above maximum datasheet specication. Output Capacitors The NDS6 series does not require output capacitors to meet datasheet specication. To meet datasheet specication, output capacitance should not exceed: Output Voltage (V) Output Capacitance (F) 5 470 12 470 15 220 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 NDS6 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1.5kVDC for 1 second. A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation The NDS6 has been recognized by Underwriters Laboratory for functional isolation. 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 NDS6 series has an ER ferrite core, 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. www.murata-ps.com/support KDC NDS6.E01 Page 2 of 6