NCS3 Series www.murata-ps.com Isolated 3W 4:1 Input Single Output DC/DC Converters Efficiency 12V or 48V Input. Nom. V V % mA mA mA Min. Typ. Min. Typ. Typ. Max. % % % % mVp/p mVp/p kHrs 12 12 12 12 48 48 48 48 3.3 5 12 15 3.3 5 12 15 10 5 0 0 10 5 0 0 250 305 300 300 124 153 150 149 125 150 150 150 65 80 80 80 700 600 250 200 700 600 250 200 74 79 81 82 70 77.5 77 78 Input Voltage Output Voltage Minimum Load Order Code Output Current SELECTION GUIDE UL 60950 recognised NCS3S1203SC NCS3S1205SC NCS3S1212SC NCS3S1215SC NCS3S4803SC NCS3S4805SC NCS3S4812SC NCS3S4815SC 4:1 Wide range voltage input INPUT CHARACTERISTICS Operating temperature range -40°C to 85°C with derating Parameter FEATURES Voltage range No electrolytic capacitors Continuous short circuit protection 73 79 80 81 74 79 80 81 Typ. Max. 12 36 48V input types 18 48 75 NCS3S48XX 12V input types PRODUCT OVERVIEW The NCS3 series of DC/DC converters offers a single output voltage from input voltage ranges of 9-36V and 18-75V. The NCS3 is housed in an industry standard package with a standard pinout. OUTPUT CHARACTERISTICS Transient response 1335 1081 1272 1617 1327 1117 1211 1574 Units V 5.5 24V input types 2 24V input types 3.5 48V input types 2 Power consumption at shutdown Voltage set point accuracy Line regulation Load regulation 55 60 55 50 55 75 65 55 9 NCS3S12XX Rated power 32 34 28 20 22 36 31 22 Min. Input reflected ripple current Parameter 76 81 83 85 77 81 83 83 Ripple and MTTF1 Noise 12V input types Input current in shutdown Applications include telecommunications, battery powered systems, process control and distributed power systems. Efficiency 24V Input. 77 82 84 86 74 80 81 81 Conditions 1.5 kVDC Isolation ‘Hi Pot Test’ 3.3V, 5V, 12V & 15V outputs Rated Input Rated Current Input 12V or 48V Current Input. 24V Input. mA p-p 2 mW 2.5 Conditions Min. 3.3V output types All other output types All output types Low line to high line All output types Peak deviation (12.5-37.5% & 37.5-12.5% swing) Settling time (within 5% Vout Nom.) Typ. ±1 Max. 2.31 3 ±2 ±0.5 ±1 5 1.5 mA Units W % % % %Vout ms GENERAL CHARACTERISTICS Parameter Conditions CTRL input current Please refer to control pin application note Min. Typ. 2 Max. Units 8 mA Max. Units ISOLATION CHARACTERISTICS Parameter Conditions Min. Isolation test voltage Flash tested for 1 minute NCS3S12XXSC NCS3S48XXSC Viso = 1kVDC 1500 Isolation Capacitance Resistance Typ. VDC 180 185 pF 1 GΩ TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Operation See derating graphs -40 85 -50 115 Storage Case temperature rise above ambient 100% Load, Nom VIN, Still Air Typ. 30 Max. Units °C 40 1 Calculated using MIL-HDBK-217 FN2, parts stress method with nominal input voltage at full load. For full details go to www.murata-ps.com/rohs www.murata-ps.com All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 1 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters ABSOLUTE MAXIMUM RATINGS Short-circuit protection (for SELV input voltages) Control pin input current Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) Input voltage, NCS3 12V input types Input voltage, NCS3 24V input types Continuous 8mA 260°C 40V 80V SWITCHING FREQUENCY Parameter Conditions 12V input types NCS3S1203SC 24V input types 12V input types NCS3S1205SC 24V input types 12V input types NCS3S1212SC 24V input types 12V input types NCS3S1215SC 24V input types 24V input types NCS3S4803SC 48V input types 24V input types NCS3S4805SC 48V input types 24V input types NCS3S4812SC 48V input types 24V input types NCS3S4815SC 48V input types Min. 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load 10% Load 100% Load Typ. 1200 280 1620 460 1200 270 1690 490 1220 310 1680 570 1130 310 1580 570 1020 270 1440 450 1190 260 1590 470 1180 1570 310 560 1180 330 1590 610 Max. Units kHz kHz kHz kHz kHz kHz kHz kHz APPLICATION NOTES Recommended Input Capacitor and Maximum Output Capacitance A 10 μF output capacitor is recommended for stability under all operating conditions. Maximum output capacitance should not exceed: Output Voltage MaximumLoad Capacitance V μF 3.3 470 5 470 12 220 15 110 www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 2 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters APPLICATION NOTES CONTINUED Start-up times Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product series will start into the maximum output capacitance with increased start times. Start-up times ms 0.7 1 2.2 2.3 1.2 1.1 1.9 2.8 Part No. NCS3S1203SC NCS3S1205SC NCS3S1212SC NCS3S1215SC NCS3S4803SC NCS3S4805SC NCS3S4812SC NCS3S4815SC Typical Start-Up Wave Form Control Pin The NCS3S converters have a shutdown feature which enables the user to disable the converter into a low power state. The control pin connects to the base of an internal NPN transistor through a 1K resistor with the converter shut down when the transistor is turned on by an external applied voltage. The converter can also be shut down using a 5V TTL signal (the unit is OFF for logic High and ON for logic LOW). If the control pin is left open (high impedance), the converter will run normally. A suitable application circuit is shown below. NCS3 D1 (e.g. 1N4001) is necessary for correct operation of the NCS3 when the control signal is LOW. The recommended drive current IB to shut down the NCS3 is 2 mA to 8 mA. The value of RC can be derived as follows: +VIN RC = VC or TTL Rc D1 CONTROL Rin 1K -VIN VC - VD1 - 0.6 - (1B x RIN ) IB Note: RIN is a 125mW resistor For a switch input: Calculate the value of Rc from the above equation given switch voltage Vc and chosen current between 2 and 8 mA. For 5V TTL Signal: Set Rc to be 680Ω or less. 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 Tin Plate, Hot Dipped over Matte Tin with Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 3 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters 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 specifi ed time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. Murata Power Solutions NCS3 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 1.5kVDC for 60 seconds. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” The NCS3 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 NCS3 series has a toroid 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. SAFETY APPROVAL The NCS3 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation, file number E151252 applies. The NCS3 Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below. NCS3S12XXSC: 0.75A NCS3S48XXSC: 0.50A All fuses should be UL approved and rated to at least the maximum allowable DC input voltage. 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 C2 than 100mΩ at 100 kHz C3 100nF multilayer ceramic capacitor, general purpose R1 450Ω resistor, carbon film, ±1% tolerance R2 50Ω BNC termination T1 3T of the coax cable through a ferrite toroid RLOAD 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 + SUPPLY Input - + R1 T1 R2 Y INPUT Output - R LOAD www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 4 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters EFFICIENCY VS LOAD NCS3S1205SC 90 90 80 80 70 70 60 60 Efficiency (%) Efficiency (%) NCS3S1203SC 50 9V 40 12V 24V 30 50 9V 40 12V 24V 30 36V 20 20 10 10 36V 0 0 0 10 20 30 40 50 60 70 80 90 0 100 10 20 30 40 NCS3S1212SC 60 90 90 80 80 70 70 60 60 50 9V 40 12V 24V 30 90 100 9V 40 12V 24V 30 36V 20 20 10 10 0 0 0 10 20 30 40 50 60 70 80 90 0 100 10 20 30 40 50 60 70 80 90 100 Load (%) Load (%) NCS3S4803SC NCS3S4805SC 90 90 80 80 70 70 60 60 Efficiency (%) Efficiency (%) 80 50 36V 50 18V 40 24V Jock 48V 30 50 18V 40 24 V 48 V 30 75 V 75V 20 20 10 10 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 Load (%) 50 60 70 80 90 100 80 90 100 Load (%) NCS3S4812SC NCS3S4815SC 90 90 80 80 70 70 60 60 Efficiency (%) Efficiency (%) 70 NCS3S1215SC Efficiency (%) Efficiency (%) 50 Load (%) Load (%) 50 18Vin 40 24 Vin 48 Vin 30 50 18V 40 24 V 48 V 30 75 V 75 Vin 20 20 10 10 0 0 0 10 20 30 40 50 Load (%) www.murata-ps.com 60 70 80 90 100 0 10 20 30 40 50 60 70 Load (%) All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 5 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters TEMPERATURE DERATING NCS3S1203SC NCS3S1205SC 3.00 3.00 9V 2.50 2.50 12V 9V 36V 2.00 24V Power ( W) Power ( W) 24V 12V 2.00 36V 1.50 1.50 1.00 1.00 0.50 0.50 0.00 0.00 60 65 70 75 80 85 90 95 60 100 65 70 75 80 85 90 95 100 Temperature (oC) Temperature (oC) NCS3S1212SC NCS3S1215SC 3.00 3.00 2.50 2.50 9V 12V 2.00 24V Power ( W) Power ( W) 2.00 36V 1.50 1.50 9V 12V 1.00 1.00 24V 36V 0.50 0.50 0.00 60 65 70 75 80 85 90 95 0.00 100 60 65 70 75 80 Temperature (oC) 85 90 95 NCS3S4803SC NCS3S4805SC 3.00 2.50 2.50 18V 2.00 24V 18V 48V 24V 2.00 Power ( W) 75V Power ( W) 100 Temperature (oC) 1.50 48V 75V 1.50 1.00 1.00 Jock 0.50 0.50 0.00 0.00 50 55 60 65 70 75 80 85 90 95 50 100 55 60 65 70 75 80 85 90 95 100 Temperature (oC) Temperature (oC) NCS3S4812SC NCS3S4815SC 3.00 3.00 18V 2.50 2.50 24V 48V 75V 2.00 Power ( W) Power ( W) 2.00 1.50 18V 24V 1.50 48V 75V 1.00 1.00 0.50 0.50 0.00 0.00 50 55 60 65 70 75 80 Temperature (oC) www.murata-ps.com 85 90 95 100 50 55 60 65 70 75 80 85 90 95 100 Temperature (oC) All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 6 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters EMC FILTERING AND SPECTRA FILTERING The module includes a basic level of filtering, sufficient for many applications. Where lower noise levels are desired, filters can easily be added to achieve any required noise performance. A DC/DC converter generates noise in two principal forms: that which is radiated from its body and that conducted on its external connections. There are three separate modes of conducted noise: input differential, output differential and input-output. This last appears as common mode at the input and the output, and cannot therefore be removed by filtering at the input or output alone. The first level of filtering is to connect capacitors between input and output returns, to reduce this form of noise. It typically contains high harmonics of the switching frequency, which tend to appear as spikes on surrounding circuits. The voltage rating of this capacitor must match the required isolation voltage. (Due to the great variety in isolation voltage and required noise performance, this capacitor has not been included within the converter.) Input ripple is a voltage developed across the internal Input decoupling capacitor. It is therefore measured with a defined supply source impedance. Although simple series inductance will provide filtering, on its own it can degrade the stability. A shunt capacitor is therefore recommended across the converter input terminals, so that it is fed from a low impedance. If no filtering is required, the inductance of long supply wiring could also cause a problem, requiring an input decoupling capacitor for stability. An electrolytic will perform well in these situations. The input-output filtering is performed by the common-mode choke on the primary. This could be placed on the output, but would then degrade the regulation and produce less benefit for a given size, cost, and power loss. Radiated noise is present in magnetic and electric forms. Thanks to the small size of these units, neither form of noise will be radiated “efficiently”, so will not normally cause a problem. Any question of this kind usually better repays attention to conducted signals. EMC FILTER AND VALUES TO OBTAIN SPECTRA AS SHOWN The following filter circuit and filter table shows the input filters typically required to meet EN55022 Quasi-Peak Curve A or B. L1 DC C1 Polyester or Ceramic capacitor TO MEET CURVE A Part Number NCS3S1203SC NCS3S1205SC NCS3S1212SC NCS3S1215SC NCS3S4803SC NCS3S4805SC NCS3S4812SC NCS3S4815SC C1 DC TO MEET CURVE B C1 2.2μF 2.2μF 1.5μF 1.5μF 4.7μF 4.7μF 4.7μF 4.7μF L1 3.3μH 3.3μH 3.3μH 3.3μH 3.3μH 3.3μH 3.3μH 3.3μH Part Number NCS3S1203SC NCS3S1205SC NCS3S1212SC NCS3S1215SC NCS3S4803SC NCS3S4805SC NCS3S4812SC NCS3S4815SC C1 4.7μF 4.7μF 4.7μF 4.7μF 9.4μF 9.4μF 9.4μF 9.4μF L1 15μH 10μH 10μH 10μH 50μH 50μH 50μH 50μH The following typcial spectra are shown for class A and class B respectively with quasi peak and mean value limits. www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 7 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters EMC FILTERING AND SPECTRA CONTINUED NCS3S1203SC 80 80 70 60 60 50 50 dBuV dBuV 70 40 40 30 30 20 20 10 10 0 1.00E+05 0 1.00E+05 1.00E+06 1.00E+07 1.00E+06 1.00E+07 1.00E+08 1.00E+08 Frequency (Hz) Frequency (Hz) 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S1205SC 40 40 30 30 20 20 10 10 0 1.00E+05 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 Frequency (Hz) 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S1212SC 40 40 30 30 20 20 10 10 0 1.00E+05 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 Frequency (Hz) 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S1215SC 40 40 30 30 20 20 10 10 0 1.00E+05 1.00E+06 1.00E+07 Frequency (Hz) www.murata-ps.com 1.00E+08 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 8 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters EMC FILTERING AND SPECTRA CONTINUED 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S4803SC 40 30 30 20 20 10 0 1.00E+05 40 10 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 Frequency (Hz) 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S4805SC 40 30 30 20 20 10 0 1.00E+05 40 10 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 Frequency (Hz) 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S4812SC 40 40 30 30 20 20 10 10 0 1.00E+05 1.00E+06 1.00E+07 0 1.00E+05 1.00E+08 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) Frequency (Hz) 80 80 70 70 60 60 50 50 dBuV dBuV NCS3S4815SC 40 30 30 20 20 10 0 1.00E+05 40 10 1.00E+06 1.00E+07 Frequency (Hz) www.murata-ps.com 1.00E+08 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 9 of 10 NCS3 Series Isolated 3W 4:1 Input Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS 21.95 [0.864] MAX Pin Function Single 1 2 3 6 7 8 -VIN +VIN Control +VOUT 0V N/C 9.45 [0.372] MAX TUBE OUTLINE DIMENSIONS 11.25 [0.443] MAX 1 2 3 6 7 8 0.40 [0.016] MIN 4.10±0.50 [0.161±0.020] 0.50±0.05 [0.020±0.002] 2.54 [0.100] 17.78 [0.700] 2.87 2.13 0.084 ] [0.113 Tube Quantity : 23 RECOMMENDED FOOTPRINT DETAILS 0.25±0.05 [0 .010±0.002] 2.60 1.67 All dimensions in inches ±0.01 (mm ±0.5mm). Tube length : 20.47±0.079 (520mm ±2mm). 0.066 ] [0.102 2.54 [0.100] x6 HOLES [ 0.045 Ø 1.15 1.00 Ø 0.039 ] 0.1 2.54 [0.100] All dimensions in millimetres (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. Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED www.murata-ps.com/support Weight: 4.4g All dimensions in mm (inches) ±0.25 (± 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. All enquiries: www.murata-ps.com/support KDC_NCS3_B01 Page 10 of 10