www.murata-ps.com NDX Series OBSOLETE IIsolated l t d 77.5W 5W Wide Input Single gle & Dual Output DC/DC Converters 0.2% Typical load regulation 1kVDC Isolation Efficiency from 67% 5V, 12V, 24V & 48V Nominal input 5V, 12V & 15V outputs Power density 0.94W/cm 3 Optional remote On/Off UL 94V-0 Package materials No electrolytic capacitors Low noise Custom solutions available PRODUCT OVERVIEW The NDX series of DC/DC converters provide up to 7.5W of output power with single or dual outputs. Unbalanced loading capability with an optional input control pin. Input voltages of 5V (4.5V to 9V), 12V (9V to 18V), 24V (18V to 36V), and 48V (36V to 75V) with outputs of 5V, 12V or 15V provided. The device is housed in a 5 sided metal case potted with UL 94V-0 rated material. The pinout is an industry standard 5 pin arrangement with an additional optional control pin. For full details go to www.murata-ps.com/rohs www.murata-ps.com mA 0.48 0.46 0.51 0.51 0.53 0.53 0.47 0.48 0.075 0.075 0.075 0.176 0.159 0.175 0.15 0.4 0.4 0.08 0.5 0.5 mVp-p 79 110 79 110 55 80 55 80 31 50 31 50 23 40 23 40 24 50 24 50 24 45 24 45 20 40 20 40 20 40 20 40 20 40 20 40 21 45 21 45 15 35 15 35 20 45 20 45 25 55 25 55 30 60 30 60 35 60 35 60 25 55 25 55 30 60 30 60 20 40 20 40 25 45 25 45 22 55 22 55 % 68 68 67 67 77 77 77 77 80 80 80 80 81 81 82 82 67 67 69 69 71 71 73 73 78 78 79 79 75 75 81 81 82 82 77 77 82 82 82 82 pF 55 55 49 49 56 56 53 53 55 55 56 56 58 58 58 58 40 40 42 42 43 43 36 36 41 41 41 41 58 58 56 56 56 56 61 61 57 57 58 58 NCS6 Series Ripple &Noise3 (Typ.) Closest Alternative (click for data sheet) Operating temperature range –40°C to 85°C A 2.02 2.02 2.02 2.02 0.77 0.77 0.77 0.77 0.38 0.38 0.37 0.37 0.187 0.187 0.187 0.187 1.83 1.83 2.15 2.15 2.69 2.69 0.89 0.89 0.86 0.86 0.86 0.86 0.402 0.402 0.38 0.38 0.38 0.38 0.198 0.198 0.19 0.19 0.19 0.19 Isolation Capacitance Continuous short circuit protection with current foldback mA 42 42 46.2 46.2 19.4 19.4 27 27 13.8 13.8 20.6 20.6 8.8 8.8 10.2 10.2 19.4 19.4 33.4 33.4 41.8 41.8 13.2 13.2 15 15 17 17 4.2 4.2 6.3 6.3 7 7 3.6 3.6 5.9 5.9 5.9 5.9 Efficiency (Min.) 2:1 Wide range voltage input 625 625 500 500 625 625 500 500 625 625 500 500 625 625 500 500 ±600 ±600 ±312 ±312 ±250 ±250 ±750 ±750 ±312 ±312 ±250 ±250 ±750 ±750 ±312 ±312 ±250 ±250 ±750 ±750 ±312 ±312 ±250 ±250 Ripple &Noise3 (Max.) RoHS compliant mA Input Current at shutdown 156 156 125 125 156 156 125 125 156 156 125 125 156 156 125 125 ±150 ±150 ±78.1 ±78.1 ±62.5 ±62.5 ±187 ±187 ±78.1 ±78.1 ±62.5 ±62.5 ±187 ±187 ±78.1 ±78.1 ±62.5 ±62.5 ±187 ±187 ±78.1 ±78.1 ±62.5 ±62.5 Input Current at 100% Load FEATURES 5 5 5 5 12 12 12 12 24 24 24 24 48 48 48 48 5 5 5 5 5 5 12 12 12 12 12 12 24 24 24 24 24 24 48 48 48 48 48 48 Input Current at 0% Load Output Current at 25% Load2 12 12 15 15 12 12 15 15 12 12 15 15 12 12 15 15 ±5 ±5 ±12 ±12 ±15 ±15 ±5 ±5 ±12 ±12 ±15 ±15 ±5 ±5 ±12 ±12 ±15 ±15 ±5 ±5 ±12 ±12 ±15 ±15 V NDXS0512C NDXS0512EC NDXS0515C NDXS0515EC NDXS1212C NDXS1212EC NDXS1215C NDXS1215EC NDXS2412C NDXS2412EC NDXS2415C NDXS2415EC NDXS4812C NDXS4812EC NDXS4815C NDXS4815EC NDXD0505C NDXD0505EC NDXD0512C NDXD0512EC NDXD0515C NDXD0515EC NDXD1205C NDXD1205EC NDXD1212C NDXD1212EC NDXD1215C NDXD1215EC NDXD2405C NDXD2405EC NDXD2412C NDXD2412EC NDXD2415C NDXD2415EC NDXD4805C NDXD4805EC NDXD4812C NDXD4812EC NDXD4815C NDXD4815EC Output Current at 100% Load2 Output Voltage Order Code1 Nominal Input Voltage SELECTION GUIDE NCS6S1212C NCS6S1212C NCS6S1215C NCS6S1215C NCS6S1212C NCS6S1212C NCS6S1215C NCS6S1215C NCS6S4812C NCS6S4812C NCS6S4815C NCS6S4815C NCS6D1205C NCS6D1205C NCS6D1212C NCS6D1212C NCS6D1215C NCS6D1215C NCS6D1205C NCS6D1205C NCS6D1212C NCS6D1212C NCS6D1215C NCS6D1215C NCS6D4805C NCS6D4805C NCS6D4812C NCS6D4812C NCS6D4815C NCS6D4815C 1. Suffix ‘EC’ indicates optional CTRL pin is fitted, as indicated in the mechanical dimensions section. 2. Please refer to minimum load application notes section on page 4. 3. See ripple & noise characterisation method. All specifications typical at TA=25°C, with recommended input/output capacitors (refer to application note), nominal input voltage and rated output current unless otherwise specified. All enquiries: www.murata-ps.com/support KDC_NDXC.G01 Page 1 of 6 NDX Series Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units 5V input types 12V input types 24V input types 48V input types 5V input types with 100μF at input 12V input types with 100μF at input 24V input types with 10μF at input 48V input types with 10μF at input 5V input types with 100μF at input 12V input types with 100μF at input 24V input types with 10μF at input 48V input types with 10μF at input BW=20Hz to 300kHz, with external input/output capacitors 4.5 9 18 36 5 12 24 48 70 18 90 80 115 60 50 54 5 9 18 36 75 V 10 mVrms Parameter Conditions Min. Typ. Max. Units Rated power NDXx0505 types All other types Voltage set point accuracy With external input/output capacitors Line regulation Low line to high line, with external input/output capacitors 5V & 12V Input 24V & 48V Input 5V & 12V Input 24V & 48V Input All types 5V & 12V input 24V & 48V input All types ±3 ±2 0.1 0.04 0.04 0.2 0.2 0.07 6.0 7.5 ±5 ±5 0.9 0.4 0.4 0.9 0.75 0.20 5V output 3.8 6 12V, 15V output 1.5 5 5V output 2.5 7 12V, 15V output 2.5 5 Typ. Max. Single outputs Dual outputs Voltage range Reflected ripple current Ripple & noise1 mA p-p OUTPUT CHARACTERISTICS Dual output Single output 25% total load to 100% total load With external input/output capacitors Load regulation Dual output Single output % voltage change on negative output 5V & 12V input when positive load varies from 25% to 75% with negative load fixed at 100% 24V & 48V input Cross regulation (dual outputs) W % % % % ABSOLUTE MAXIMUM RATINGS Short-circuit protection (Max. case temperature rise 95°C above ambient) Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) 2 Minimum output load for specification Control pin input voltage Input voltage, NDXD05, Input voltage, NDXD12, NDXS12 types Input voltage, NDXD24, NDXS24 types Input voltage, NDXD48, NDXS48 types 12V, 15V outputs Continuous 5V output, VIN = nominal, 25ºC Continuous 260°C 25% of rated load on each output 7V 10V 20V 40V 80V ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Resistance Flash tested for 1 second Viso = 1kVDC 1000 1 Units VDC GΩ 1. See ripple & noise characterisation method 2. Please refer to minimum load application notes section on page 4. www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NDXC.G01 Page 2 of 6 NDX Series Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters GENERAL CHARACTERISTICS Parameter Switching frequency Conditions Min. 100% total load to 25% total load (Dual Output Types) 100% total load to 25% total load (Single Output Types) 5V & 12V input 24V & 48V input 5V, 12V & 24V input 48V input 5V, 12V & 15V outputs Typ. 100 5V outputs 12V & 15V outputs 12V & 15V output 12V & 15V output 680 620 850 600 0.8 0.1 0.8 0.2 7.0 3.0 7.0 3.0 90 90 -0.6 0 -0.6 -0.1 3.0 0.7 3.0 0.3 Module ON (or pin unconnected) Dual outputs Control pin input1 Single outputs Module OFF Dual outputs Units 900 100 Single outputs Max. kHz V mA V mA V mA V mA TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Operation Storage Case temperature rise above ambient Typ. -40 -50 100% Load, Nom VIN, Still Air 1212, 1215, 2412, 2415, 4812, 4815 0512, 2405, 4805 0505, 0515, 1205 Max. Units 85 130 35 43 48 °C MEAN TIME TO FAILURE (MTTF)2 Part Number 0°C 25°C Units NDXD2412C NDXD2415C NDXD4812C NDXD4815C 2590 2492 2587 2351 1528 1462 1558 1379 kHrs 1. See application notes on page 4. 2. Calculated using MIL-HDBK-217F with nominal input voltage at full load. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. 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 www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NDXC.G01 Page 3 of 6 NDX Series Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters APPLICATION NOTES External Capacitance Although these converters will work without external capacitors, they are necessary in order to guarantee the full parametric performance over the full line and load range. All parts have been tested and characterised using the following values and test circuit. Value Input Voltage 5V & 12V 24V & 48V CIN 100μF, 100V 10μF, 200V COUT1 COUT2 0.1μF, 25V multi-layer ceramic 100μF, 25V (low ESR) Recommended Input & Output Capacitors +VIN CIN +VOUT NDXSC -VIN +VIN COUT1 COUT2 CIN COUT1 COUT2 COUT1 COUT2 OV NDXDC -VIN OV +VOUT -VOUT Control Pin Cross Regulation Dual Output: This provides an OFF function, which puts the converter into a low power mode. When the pin is high the converter is OFF. Standard TTL levels can be used but the maximum high level must not exceed 7.0V. The pin can be left open for normal operation or at voltage below 0.8V with respect to the -VIN pin. Single Output: As per dual output, however a series diode must be fitted when the control pin is used on the single output variants. Recommended diode 1N4148 or similar (direction of fitting is cathode to control pin). 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 ripple specification a total minimum load of 25% full load is required, however, the NDX can be used with much lighter loading at the expense of increased ripple. A small load of 150mW is required on the negative output to ensure the maximum negative output voltage is not exceeded. NDX cross regulation is defined on page 2. Minimum load The minimum load for correct operation is 25% of the full rated load across the specified input voltage range. Lower loads may cause a significant increase in output ripple and may cause the output voltage to exceed its specification transiently during power-down when the input voltage also falls below its rated minimum. A minimum loading of 30% load is required on NDXD4805 to prevent output voltage rise above specification during power-down. 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 NDX 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?” For a part holding no specific agency approvals, such as the NDX series, 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 NDX series has an EI 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 All enquiries: www.murata-ps.com/support KDC_NDXC.G01 Page 4 of 6 NDX Series Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters CHARACTERISATION TEST METHODS Ripple & Noise Characterisation Method Ripple and noise measurements are performed with the following test configuration with the inclusion of recommended input and output capacitors. C1 C2 C3 R1 R2 T1 RLOAD 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 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 T1 + R2 Y INPUT Output - - R LOAD Input Reflected Ripple Current Test Method Input reflected ripple current measurements are performed with the following test configuration with the inclusion of recommended input and output capacitors. C1 L1 C2 220uF with ESR of <0.1Ω at 100kHz, rated at supply voltage 12uH rated at 150% minimum of the DC current taken by the converter. The recommended input capacitor for the DC/DC converter. Current Probe L Supply +v + Input C1 Supply www.murata-ps.com -v C2 DC/DC Converter Load - Input All enquiries: www.murata-ps.com/support KDC_NDXC.G01 Page 5 of 6 NDX Series Isolated 7.5W Wide Input Single & Dual Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS 1.26 (32.00) Pin 0.98 (25.00) 1 2 3* 4 5 6 NDXD2412C XYYWW 0.394 (10.00) Function Duals Singles -VIN +VIN CTRL +VOUT OV -VOUT -VIN +VIN CTRL +VOUT No pin OV * Optional pin 0.189 (4.8) 0.157 (4.0) RECOMMENDED FOOTPRINT DETAILS Ø 0.041 (1.04) 0.035 (0.90) 0.069 (1.75) Ø 0.063 (1.60) 0.1 (2.54) HOLES 4 0.00394 (0 *3 2 0.2 (5.08) 5 1 0.400 (10.16) 0.392 (9.96) 0.80 (20.32) † 6 0.092 (2.34) 0.8 (20.32) 0.23±0.04 (5.84±1.0) * Optional pin Weight: 20g All dimensions in inches ±0.010 (mm 0.25mm) except where stated otherwise. All pins on a 0.100 (2.54) pitch and within 0.010 (0.25) of true position. 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 finish. † Hole not required for single output variants. All dimensions in inches ±0.010 (mm 0.25mm). 1.362 (34.60) 0.236±0.020 (6.00±0.50) TUBE OUTLINE DIMENSIONS 0.1 (2.54) * 0.20 (5.08) 0.732 (18.60) 0.488 (12.40) 0.031±0.006 (0.80±0.15) All dimensions in inches ±0.010 (mm 0.25mm). Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED www.murata-ps.com/locations Quantity: 15 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. © 2011 Murata Power Solutions, Inc. All enquiries: www.murata-ps.com/support KDC_NDXC.G01 Page 6 of 6