NDS6 Series www.murata-ps.com Isolated 6W Wide Input Single & Dual Output DC/DC Converters SELECTION GUIDE 2 Order Code FEATURES UL 60950 recognized RoHS compliant Input Voltage Output Voltage Nom. NDS6D2405C NDS6D2412C NDS6D2415C NDS6S2405C NDS6S2412C NDS6S2415C Output Current V V Min. Load A 24 24 24 24 24 24 ±5 ±12 ±15 5 12 15 ±0.06 ±0.025 ±0.020 0.12 0.05 0.04 Input Current Efficiency Ripple 100% Shut & Noise Min. Typ. Load Down mA mA mV p-p % % ±100% 0% Load Load A mA ±0.6 ±0.250 ±0.200 1.2 0.5 0.4 2:1 Wide range voltage input INPUT CHARACTERISTICS Operating temperature range –40°C to 85°C Parameter Conditions Voltage range Reflected ripple current All NDS6D24 & NDS6S24 types All NDS6D24 & NDS6S24 types 7 7 7 4 5.5 6 300 290 290 305 290 290 1.1 1.1 1.1 1.1 1.1 1.1 40 40 45 40 40 40 80 85 85 80 84 85 MTTF1 kHrs 82 87 87 82 86 87 Min. Typ. Max. Units 18 24 7 36 V mA p-p Min. Typ. Max. Units 6 W Short circuit protection 0.2% Typical load regulation OUTPUT CHARACTERISTICS 1.5kVDC Isolation ‘Hi-Pot Test’ Rated power 24V Nominal input Parameter Voltage set point accuracy Single & dual outputs Power density 0.94W/cm3 Optional remote On/Off Line regulation Conditions Positive & negative except NDS6D2405 negative output ±2 NDS6D2405 negative output ±4 Load regulation 0.01 0.1 Negative outputs 0.02 0.2 5V outputs 0.2 1.7 12V & 15V outputs 0.2 1 % Low line to high line UL 94V-0 Package materials No electrolytic capacitors Positive outputs 10% total load to 100% total load % Low noise PRODUCT OVERVIEW 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 industry standard package with a standard pinout. The NDS6 is packaged in a metal case for improved EMI shielding and is also encapsulated for superior thermal performance. Versions with optional remote on/off control pin are also available. Applications include telecommunications, battery powered systems, process control and distributed power systems. Cross regulation % % voltage change on negative output when positive load varies from 12.5% (0.75W) to 37.5% (2.25W) with negative load fixed at 50% (3W) 5V 5 12V & 15V 2 % ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Capacitance Flash tested for 1 second Viso = 1kVDC 1500 1 Typ. 225 Max. Units VDC GΩ pF ABSOLUTE MAXIMUM RATINGS Short-circuit protection Internal power dissipation Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) Minimum output load for specification3 Control pin input voltage Input voltage, NDS6 24V input types Continuous 2.7W 260°C 10% of rated load on each output ±18V 40V 1 Calculated using MIL-HDBK-217F with nominal input voltage at full load. 2 To order with optional control pin, prefix C with “E”. For example NDS6D0505EC. 3 Operation below 10% minimum load may cause increased output ripple. 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/support KDC_NDS6.E01 Page 1 of 6 NDS6 Series Isolated 6W Wide Input Single & Dual Output DC/DC Converters GENERAL CHARACTERISTICS1 Parameter Conditions Min. Switching frequency Typ. Max. Units 0 0.8 1.5 kHz V mA V mA Max. Units 130 3.0 Module ON (or pin unconnected) Control pin input Module OFF TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Operation Storage Typ. -40 -50 Case temperature rise above ambient 100% Load, Nom VIN, Still Air, Thermal shutdown Case Temperature 5V 12V & 15V 85 130 29 22 110 °C APPLICATION NOTES Control Pin NDS6D Cross Regulation This provides an OFF function, which puts the converter into a low power mode, when the voltage applied to the pin is less than 0.8V. When the pin is high or un-connected, the converter is on. Load regulation is at its best when the positive and negative loads are balanced. When the loads are asymmetric, the negative output is not as tightly regulated as the positive output. To meet datasheet specification, 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 specification. Output Capacitors The NDS6 series does not require output capacitors to meet datasheet specification. To meet datasheet specification, output capacitance should not exceed: Output Voltage (V) 5 12 15 Output Capacitance (μF) 470 470 220 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 specified 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 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/support KDC_NDS6.E01 Page 2 of 6 NDS6 Series Isolated 6W Wide Input Single & Dual Output DC/DC Converters SAFETY APPROVAL The NDS6 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature limit of 120ºC (case temperature measured on the face opposite the pins). File number E151252 applies. Note: This series gained UL 60950 recognition for products manufactured on or after datecode G1148, any NDS6 parts manufactured before this date code should not be considered UL 60950 recognized. Any NDS6 that is UL recognized will be printed with the UL logo. RoHS COMPLIANCE INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of 260ºC for 10 seconds. The pin termination finish on this product series is a Gold flash (0.05-0.10 micron) over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit www.murata-ps.com/rohs CHARACTERISATION TEST METHODS 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 than 100mΩ at 100 kHz 100nF multilayer ceramic capacitor, general purpose 450Ω resistor, carbon film, +/-1% tolerance 50Ω BNC termination 3T of the coax cable through a ferrite toroid Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires C2 C3 R1 R2 T1 RLOAD Measured values are multiplied by 10 to obtain the specified values. Differential Mode Noise Test Schematic DC/DC Converter OSCILLOSCOPE C1 C2 C3 + Input SUPPLY - R1 R2 T1 + Y INPUT Output - R LOAD EFFICIENCY VS LOAD NDS 24V Input, Dual Output 90 80 80 15V 60 Efficiency (%) 90 70 Efficiency (%) NDS 24V Input, Single Output 12V 5V 50 40 15V 70 12V 60 5V 50 40 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_NDS6.E01 Page 3 of 6 NDS6 Series Isolated 6W Wide Input Single & Dual Output DC/DC Converters TEMPERATURE DERATING NDS6D2405C 7 7 6 6 600 lfm 500 lfm 300 lfm 400 lfm 4 200 lfm 3 100 lfm 2 still air 5 Output Power (W) 5 Output Power (W) NDS6D2412C 600 lfm 500 lfm 400 lfm 4 2 1 0 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Ambient Temperature (ºC) Ambient Temperature (ºC) NDS6D2415C NDS6S2405C 7 7 6 6 600 lfm 500 lfm 200 lfm 300 lfm 400 lfm 100 lfm 4 still air 3 2 Output Power (W) Output Power (W) 100 lfm still air 3 1 5 300 lfm 200 lfm 600 lfm 500 lfm 5 200 lfm 400 lfm 300 lfm 4 100 lfm 3 2 still air 1 1 0 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 -40 -30 -20 -10 80 NDS6S2412C 30 40 50 60 70 80 6 600 lfm 500 lfm 300 lfm 400 lfm 200 lfm 100 lfm 4 3 still air Output Power (W) Output Power (W) 20 7 6 5 600 lfm 500 lfm 400 lfm 300 lfm 200 lfm 100 lfm 4 still air 3 2 2 1 1 0 10 NDS6S2415C 7 5 0 Ambient Temperature (ºC) Ambient Temperature (ºC) -40 -30 -20 -10 0 10 20 30 40 Ambient Temperature (ºC) 50 60 70 80 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Ambient Temperature (ºC) www.murata-ps.com/support KDC_NDS6.E01 Page 4 of 6 NDS6 Series Isolated 6W Wide Input Single & Dual Output DC/DC Converters EMC FILTERING AND SPECTRA FILTERING The module includes a basic level of filtering, typically sufficient to meet EN 55022 Curve A Quasi-Peak EMC limit, as shown in the following plots. NDS6S2405C NDS6S2412C 90 C onducted E mis s ions (dB uV ) C onducted E mis s ions (dB uV ) 90 80 70 60 50 40 30 60 50 40 30 20 10 10 1000000 10000000 0 100000 100000000 F requency (Hz) NDS6S2415C C onducted E mis s ions (dB uV ) 70 60 50 40 30 10000000 100000000 10000000 100000000 10000000 100000000 80 70 60 50 40 30 20 20 10 10 1000000 F requency (Hz) 10000000 0 100000 100000000 NDS6D2412C 1000000 F requency (Hz) NDS6D2415C 90 C onducted E mis s ions (dB uV ) 90 80 70 60 50 40 30 80 70 60 50 40 30 20 20 10 10 0 100000 F requency (Hz) 90 80 0 100000 1000000 NDS6D2405C 90 C onducted E mis s ions (dB uV ) 70 20 0 100000 C onducted E mis s ions (dB uV ) 80 1000000 F requency (Hz) 10000000 100000000 0 100000 1000000 F requency (Hz) www.murata-ps.com/support KDC_NDS6.E01 Page 5 of 6 NDS6 Series Isolated 6W Wide Input Single & Dual Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS NDS6xxxxxC 2 3 5* 9 11 14 16 22 23 XYYWW 0.787 (20.0) Function Pin 1.26 (32.0) Single Dual -VIN -VIN On/Off No pin N/C +VOUT -VOUT +VIN +VIN -VIN -VIN On/Off OV -VOUT +VOUT OV +VIN +VIN * Optional pin TUBE OUTLINE DIMENSIONS 0.394 (10.0) 0.256 (6.50) 1.00±0.15 (0.04±0.006) 23.0 (0.906) 0.02 (0.5) 8.5 (0.335) 0.0177-0.0217 (0.45-0.55) 20.5 (0.807) 0.600 (15.24) Tube length 520 (20.47) All dimensions in mm ±0.25mm (inches ±0.010). 0.200 (5.08) 0.200 (5.08) 2 3 0.093 (2.36) * 5 9 Quantity: 15 RECOMMENDED FOOTPRINT DETAILS 11 8 HOLES 0.600 (15.24) 0.039 (1.0) Ø 23 0.1 (2.54) 22 0.100 (2.54) 16 14 0.180 (4.57) * Weight: 16.4g Typ. All dimensions in mm (inches) ± 0.5 (0.020) except pin to pin tolerance ± 0.25 (0.010). All pins on a 2.54 (0.100) pitch and within 0.25 (0.010) of true position. 0.1 (2.54) The copper case is connected to the output (-VOUT) pin. Care is needed in the design of this circuit board on which the converter is mounted. Top side tracks must not contact the edge of the case on the underside of the unit. Please note that from 2010 onwards, you may receive either a blue or a black case. Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED * Optional pin All dimensions in mm ±0.25mm (inches ±0.010). 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. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support KDC_NDS6.E01 Page 6 of 6