NCS1 Series www.murata-ps.com Isolated 1W 4:1 Input Single Output DC/DC Converters SELECTION GUIDE e Order Code VIonltpaugte VOoulttapguet COuurtrpeuntt 5V Eorffi 2c4ieVn Icnyput. 1E2ffiVc Iinepnucyt. Ripple and Noise olation acitanc MTTF1 sp Nom. Min. Typ. Min. Typ. Typ. Max. ICa V V mA % % % % mVp/p mVp/p pF kHrs NCS1S1203SC 12 3.3 303 73 77 71 75 24 70 24 1020 NCS1S1205SC 12 5 200 76 79 74 77 25 50 30 915 NCS1S1212SC 12 12 83 75 78 75 79 40 120 35 1130 NCS1S2403SC 24 3.3 303 76 78.5 73 76 35 70 28 1217 NCS1S2405SC 24 5 200 79 82 77 80 27 50 42 1022 FEATURES NCS1S2412SC 24 12 83 80 83 77 80 28 120 42 943 (cid:132)(cid:3)UL 60950 recognised INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units (cid:132)(cid:3)4:1 Wide range voltage input 12V input types 4.5 12 18 Voltage range V (cid:132)(cid:3)Operating temperature range -40°C to 24V input types 9 24 36 105°C with derating 5V input voltage 0.26 NCS1S12XX 12V input voltage 0.1 (cid:132)(cid:3)1kVDC Isolation “Hi Pot Test” Input current A 12V input voltage 0.1 (cid:132)(cid:3)3.3V, 5V & 12V outputs NCS1S24XX 24V input voltage 0.05 (cid:132)(cid:3)No electrolytic capacitors Input reflected ripple NCS1S12XX 5 30 mA p-p current NCS1S24XX 5 15 (cid:132)(cid:3)Continuous short circuit protection OUTPUT CHARACTERISTICS PRODUCT OVERVIEW Parameter Conditions Min. Typ. Max. Units The NCS1 series of DC/DC converters offers a Rated power All output types 1 W single output voltage from input voltage ranges Minimal load to meet datasheet specification 10 % of 4.5-18V and 9-36V. The NCS1 is housed in an Voltage set point accuracy All output types ±1 ±2 % industry standard package with a standard pinout. Line regulation Low line to high line ±0.5 % Load regulation All output types 0.5 % Applications include telecommunications, battery Peak deviation (12.5-37.5% & 37.5-12.5% swing) 5 %Vout powered systems, process control and distributed Transient response Settling time 2 ms power systems. (within 5% Vout Nom.) ISOLATION CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Isolation test voltage Flash tested for 1 second 1000 VDC Resistance Viso = 1kVDC 1 GΩ GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Switching frequency 100 400 kHz Module on, pin unconnected or open collector floating Control pin input Module off 0.8 V 1 Calculated using MIL-HDBK-217 FN2, parts stress method with nominal input voltage at full load. For full details go to All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. www.murata-ps.com/rohs www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 1 of 8

NCS1 Series Isolated 1W 4:1 Input Single Output DC/DC Converters TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Operation -40 105 Storage -50 125 °C Case temperature rise above ambient 100% Load, Nom VIN, Still Air 15 22 ABSOLUTE MAXIMUM RATINGS Short-circuit protection (for SELV input voltages) Continuous Control pin input voltage 18V Max Lead temperature 1.0mm from case for 10 seconds (to JEDEC JESD22-B106 ISS C) 260°C Input voltage, NCS1 12V input types 25V Input voltage, NCS1 24V input types 40V APPLICATION NOTES Maximum Output Capacitance Maximum output capacitance should not exceed: Output Voltage Maximum Load Capacitance V μF 3.3 470 5 470 12 220 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 Part No. ms NCS1S1203SC 6 NCS1S1205SC 9 NCS1S1212SC 20 NCS1S2403SC 12 NCS1S2405SC 7 NCS1S2412SC 12 Control Pin The NCS1 converters have a shutdown feature which enables the user to put the converter into a low power state. The control pin connects directly to the base of an internal transistor, and the switch off mechanism for the NCS1 works by forward biasing this NPN transistor. If the pin is left open (high impedance), the converter will be ON (there is no allowed low state for this pin), but once a control voltage is applied with sufficient drive current, the converter will be switched OFF. A suitable application circuit is shown below. D (e.g. 1N4003) is required to provide high impedence when the signal is NCS1 1 V low. From the NCS1 specification, the drive current to operate this function is IN recommended to be 3mA, and hence the value of R can be derived as follows: 1 R V - V - V 2 R = C D Q V R D 1 IC OVC 1 1 CTRL Q Assuming V=5V, V=0.7V and V=1V: 1 C D Q -V 5 - 0.7 - 1.0 IN R= = 1100Ω 1 3 x 10-3 www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 2 of 8

NCS1 Series Isolated 1W 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 specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. Murata Power Solutions NCS1 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 NCS1 has been recognized 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 NCS1 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 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 NCS1 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation to a maximum case temperature of 105°C. File number E151252 applies. The NCS1 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. NCS1S12xxSC: 1A NCS1S24xxSC: 0.5A All fuses should be UL approved and rated to at least the maximum allowable DC input voltage. 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. CHARACTERISATION TEST METHODS Ripple & Noise Characterisation Method Ripple and noise measurements are performed with the following test configuration. C1 1μF X7R m ultilayer 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 R1 T1 R2 + + Y INPUT SUPPLY Input Output - - R LOAD www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 3 of 8

NCS1 Series Isolated 1W 4:1 Input Single Output DC/DC Converters EFFICIENCY VS LOAD NCS1S1203SC NCS1S1205SC 80 90 70 80 70 60 60 50 %) %) 50 Efficiency ( 3400 4511.28 5V VViVniinnin Efficiency ( 3400 4511.28 5V VViVniinnin 20 20 10 10 0 0 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Load (%) Load (%) NCS1S1212SC NCS1S2403SC 90 90 80 80 70 70 60 60 Efficiency (%) 345000 4511. 285V VViVniinnin Efficiency (%) 345000 9123246 V VVViniiinnn 20 20 10 10 00 10 20 30 40 50 60 70 80 90 100 00 10 20 30 40 50 60 70 80 90 100 Load (%) Load (%) NCS1S2405SC NCS1S2412SC 90 90 80 80 70 70 60 60 Efficiency (%)4500 9123246 V VVViniiinnn Efficiency (%) 4500 91224 V VViniinn 30 30 36 Vin 20 20 10 10 00 10 20 30 40 50 60 70 80 90 100 00 10 20 30 40 50 60 70 80 90 100 Load (%) Load (%) www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 4 of 8

NCS1 Series Isolated 1W 4:1 Input Single Output DC/DC Converters TEMPERATURE DERATING NCS1S1203SC NCS1S1205SC 100% 100% 90% 90% 80% 80% %) 70% %)70% Load ( 5600%% s1t0il0l alfimr oad (5600%% s1t0il0l alfimr 40% 200 lfm L40% 200 lfm 30% 400 lfm 30% 400 lfm 20% 20% 10% 10% 0% 0% 70 80 90 100 110 80 90 100 110 Ambient Temperature OC Ambient Temperature OC NCS1S1212SC NCS1S2403SC 100% 100% 90% 90% 80% 80% Load (%)567000%%% s10ti0ll lafmir ad (%)567000%%% s1t0il0l aLiFrM o 40% 200 lfm L40% 200 LFM 30% 400 lfm 30% 400 LFM 20% 20% 10% 10% 0% 0% 80 90 100 110 70 75 80 85 90 95 100 105 Ambient Temperature OC Ambient Temperature OC NCS1S2405SC NCS1S2412SC 100% 100% 90% 90% 80% 80% %)70% %) 70% Load (456000%%% s12t00il00l aLLiFFrMM Load ( 456000%%% s12t00il00l allffimmr 30% 400 LFM 30% 400 lfm 20% 20% 10% 10% 0% 0% 70 80 90 100 110 80 90 100 110 Ambient Temperature OC Ambient Temperature OC www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 5 of 8

NCS1 Series Isolated 1W 4:1 Input Single Output DC/DC Converters EMC FILTERING AND SPECTRA FILTERING The module includes a basic level of filtering, the following table shows the additional input capacitor and input inductor typically required to meet EN 55022 Curve A Quasi-Peak EMC limit, as shown in the following plots. Part Number Capacitor Inductor Common Mode Choke NCS1S1203SC 330nF 500μH NCS1S1205SC 330nF 500μH NCS1S1212SC 2.2μF 2.2mH NCS1S2403SC 330nF 500μH 700μH NCS1S2405SC 330nF 500μH NCS1S2412SC 330nF 500μH www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 6 of 8

NCS1 Series Isolated 1W 4:1 Input Single Output DC/DC Converters EMC FILTERING AND SPECTRA NCS1S1203SC NCS1S1205SC 80 80 70 70 60 60 50 50 uV 40 uV 40 B 30 B 30 d d 20 20 10 10 0 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) Frequency (Hz) NCS1S1212SC NCS1S2403SC 80 80 70 70 60 60 50 50 V 40 V 40 u u B 30 B 30 d d 20 20 10 10 0 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) Frequency (Hz) NCS1S2405SC NCS1S2412SC 80 80 70 70 60 60 50 50 uV 40 uV 40 B 30 B 30 d d 20 20 10 10 0 0 1.00E+05 1.00E+06 1.00E+07 1.00E+08 1.00E+05 1.00E+06 1.00E+07 1.00E+08 Frequency (Hz) Frequency (Hz) www.murata-ps.com All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 7 of 8

NCS1 Series Isolated 1W 4:1 Input Single Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS PIN CONNECTIONS Function Pin 21.87 [0.861] MAX Single 1 -VIN 2 +VIN 3 Control 8.2 [0.323] MAX 6 +VOUT 7 -VOUT TUBE OUTLINE DIMENSIONS 0.50 (0.0197) NCS1S1205SC 11.30 [0.445] MAX XYYWW 12.30 (0.484) 0.40 [0.016] MIN 0.75 (0.0295) 4.10±0.50 1 2 3 6 7 ±0.20 (0.0079) 5.00 (0.1969) [0.161±0.020] 0.50±0.05 2.00 (0.0787) 2.00 (0.0787) 2.54 [0.100] [0.020±0.002] 8.20 15.24 [0.600] (0.3228) All dimensions in millimetres ±0.5 (inches ±0.01). Tube length: 520±2 (20.47 inches ±0.079). Quantity: 23 3.52 [0.139] RECOMMENDED FOOTPRINT DETAILS 2.87 0.113 0.25±0.05 [0 .010±0.002] 2.54 [0.100] 2.62 [0.103] 1.92 0.076 x6 HOLES Ø11..1050 [Ø00..004359] 2.54 [0.100] 0.1 All dimensions in millimetres (inches) ± 0.5 (0.020) except pin to pin tolerance ±0.25 (0.010). Weight: 3.3g All dimensions in mm (inches) ±0.25 (± 0.010). All pins on a 2.54 (0.100) pitch and within 0.25 (0.010) of true position. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED 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 All enquiries: www.murata-ps.com/support KDC_NCS1.D01 Page 8 of 8

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: NCS1S2412SC NCS1S2405SC NCS1S2403SC NCS1S1205SC NCS1S1212SC NCS1S1203SC