NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters FEATURES UL 95 recognition pending :1 Wide range voltage input Operating temperature range - C to 5 C Typical load regulation from.5% 1.5kVDC Isolation 3.3V, 5V, 1V & 15V outputs UL 9V- Package materials No electrolytic capacitors Thermal shutdown Under voltage lock out Current fold back PRODUCT OVERVIEW The NCS1 series of DC/DC converters offers single & dual output voltages from input voltage ranges of 9-3V and 1-75V. The NCS1 is housed in an industry standard package with a standard pinout. The NCS1 is packaged in a metal case for improved EMI shielding and is also encapsulated for superior thermal performance. Applications include telecommunications, battery powered systems, process control and distributed power systems. For full details go to /rohs SELECTION GUIDE Load Regulation Input Voltage Output Output Positive Negative Positive Negative Order Code Voltage Current Output Output Output Output Efficiency MTTF 1 Nom. Typical Max Min. Typ. V V A % % % % % Hrs NCS1S13C 1 3.3 3. 1 1.5 7 3.5 9,9 NCS1S15C 1 5..5 1 313,57 NCS1S11C 1 1 1..1.3 3.5 3,59 NCS1S115C 1 15..1.3 3 5.5 195,59 NCS1S3C 3.3 3. 1. 1 5.5 31,93 NCS1S5C 5..5 1 7.5 1,117 NCS1S1C 1 1..1.3.5 9,593 NCS1S15C 15..1.3 5 59,5 NCS1D15C 1 ±5 ±1..15.3.3 1.5 1,55 NCS1D11C 1 ±1 ±.5.5..3 1.5 3 5 15,75 NCS1D115C 1 ±15 ±..5.1.3 1.5 1,35 NCS1D5C ±5 ±1..15.5.3 7 15,931 NCS1D1C ±1 ±.5.5..3 1.5 3 5 15,533 NCS1D15C ±15 ±..5..3 1.5 3 5 1,57 SELECTION GUIDE (Continued) Input Current Ripple and Noise 1% Load 1% Load 1% Load Order Code Typ. 1/V Typ. V Typ. 1/V Typ. Max A A A mvp/p mvp/p NCS1S13C.15.1 1. 15 NCS1S15C.1.1 1.1 5 15 NCS1S11C.1. 1. 15 NCS1S115C..1 1. 1 15 NCS1S3C.5..3 1 15 NCS1S5C.5..3 9 15 NCS1S1C.3..3 75 15 NCS1S15C.3..3 9 15 NCS1D15C..7 1.5 35 1 NCS1D11C..7 1. 1 NCS1D115C.5.7 1.5 55 1 NCS1D5C.3.7.3 7 1 NCS1D1C.3.7.3 1 NCS1D15C.3.7. 55 1 INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units 1V input types 9 3 Voltage range V V input types 1 75 Turn on threshold 1V input types.5 Turn off threshold 1V input types 7.5 Under voltage lock out V Turn on threshold V input types 1.7 Turn off threshold V input types 15. Power consumption at NCS1X1 1 mw shutdown NCS1X 1 V dual output types 15 Reflected ripple current ma p-p All other types 1 1 Calculated using MIL-HDBK-17 FN, parts stress method with nominal input voltage at full load. All specifications typical at TA=5 C, nominal input voltage and rated output current unless otherwise specified. KDC_NCS1C.A3 Page 1 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters OUTPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Rated power All output types 1 W Minimal load to meet datasheet specification 1 % Voltage set point accuracy Positive outputs ± Negative outputs ±3 % Line regulation Low line to high line Positive outputs..1 Negative outputs.3 1 % Cross Regulation D15 & D5 ± ±.5 D11, D115,D1, D15 ± ±5 % Transient response Peak deviation (1.5-37.5% & 37.5-1.5% swing) 5 %V out Settling time Single output types 5 (within 1% V out Nom.) Dual output types 5 μs ISOLATION CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Isolation test voltage Flash tested for 1 seconds 15 VDC Resistance Viso = 1kVDC 1 GΩ Capacitance S13, S15, S3, S5 All other types 3 pf ABSOLUTE MAXIMUM RATINGS Short-circuit protection (for SELV input voltages) 3 minutes Control pin input voltage 1V Max Lead temperature 1.mm from case for 1 seconds (to JEDEC JESD-B1 ISS C) C Input voltage, NCS1 1V input types V Input voltage, NCS1 V input types V GENERAL CHARACTERISTICS 1 Parameter Conditions Min. Typ. Max. Units Switching frequency S13, S15, S3 & S5 3 All other types khz Control pin input Module on, pin unconnected or open collector floating Module off. V TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Operation With derating - see derating graph - 5 Storage -5 15 Case temperature above ambient Thermal shutdown 1% Load, Nom VIN, Still Air Case Temperature NCS1S13C 5 NCS1S115C, NCS1D15C, NCS1D5C All other types Single 3.3V & 5V outputs 135 All other types 1 C KDC_NCS1C.A3 Page of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters APPLICATION NOTES Output Capacitance and start-up times The NCS1 series does not require output capacitors to meet datasheet specification. To meet datasheet specification, total output capacitance should not exceed: Part No. Maximun Load Capacitance (per output) Start-up times μf ms NCS1S13C 7 1 NCS1S15C 7 NCS1S11C 7 NCS1S115C.5 NCS1S3C 7 1 NCS1S5C 7 NCS1S1C NCS1S15C.5 NCS1D15C 5 NCS1D11C 1 NCS1D115C 1 9 NCS1D5C 5 NCS1D1C 1 7.5 NCS1D15C 1 7 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 NCS1 series of DC/DC converters are all 1% 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? For a part holding no specifi c agency approvals, such as the NCS1 series, both input and output should normally be maintained within SELV limits i.e. less than.v peak, or VDC. 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 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 % from specifi ed 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. RoHS COMPLIANCE INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of ºC for 1 seconds. The pin termination finish on this product series is a Gold flash (.5-.1 micron) over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit /rohs KDC_NCS1C.A3 Page 3 of 1
NCS1 Series Isolated 1W :1 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. C1 1μF X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter 1μF 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 C than 1mΩ at 1 khz C3 1nF multilayer ceramic capacitor, general purpose R1 5Ω resistor, carbon film, ±1% tolerance R 5Ω 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 1 to obtain the specified values. Differential Mode Noise Test Schematic DC/DC Converter SUPPLY + + Input Output C1 C C3 R1 T1 R OSCILLOSCOPE Y INPUT - - R LOAD KDC_NCS1C.A3 Page of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters EFFICIENCY VS LOAD NCS1S13C NCS1S15C 9 9 5 5 75 75 7 5 V 1V 7 5 V 1V 55 55 5 5 1% % 3% % 5% % 7% % 9% 1% 5 1% % 3% % 5% % 7% % 9% 1% NCS1S11C NCS1S115C 7 V 1V 7 7 V 1V 7 7 7 7 7 7 7 1% % 3% % 5% % 7% % 9% 1% 1% % 3% % 5% % 7% % 9% 1% NCS1S3C 9 NCS1S5C 9 5 5 75 75 7 V V 7 5 V V 55 5 5 1% % 3% % 5% % 7% % 9% 1% 5 1% % 3% % 5% % 7% % 9% 1% NCS1S1C 9 NCS1S15C 9 5 5 75 V V 75 V V 7 7 5 5 1% % 3% % 5% % 7% % 9% 1% 1% % 3% % 5% % 7% % 9% 1% KDC_NCS1C.A3 Page 5 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters EFFICIENCY VS LOAD NCS1D15C 9% NCS1D11C 9% % % 7% 7% % 5% % V 1V % 5% V 1V % 3% % 3% 1% 1% % 3% % 5% % 7% % 9% 1% % 1% % 3% % 5% % 7% % 9% 1% NCS1D115C 9% NCS1D5C 95% % 5% 75% 7% 5% % 5% V 1V 55% 5% V V 35% % 5% 3% 15% % 1% % 3% % 5% % 7% % 9% 1% 5% 1% % 3% % 5% % 7% % 9% 1% NCS1D1C NCS1D15C 9% 1% % 9% 7% % 7% % 5% % V V % 5% % V V 3% 3% % % 1% 1% % 3% % 5% % 7% % 9% 1% 1% 1% % 3% % 5% % 7% % 9% 1% KDC_NCS1C.A3 Page of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters TEMPERATURE DERATING NCS1S13C Input Voltage Range = 9-3V Input Voltage = 1V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1S15C Input Voltage Range = 9-3V Input Voltage = 1V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1S11C Input Voltage Range = 9-3V Input Voltage = 1V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1S115C Input Voltage Range = 9-3V Input Voltage = 1V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - KDC_NCS1C.A3 Page 7 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters TEMPERATURE DERATING NCS1S3C Input Voltage Range = 1-75V Input Voltage = V 1 1 1 1 1 lfm 1 lfm lfm lfm lfm lfm - - - - NCS1S5C Input Voltage Range = 1-75V Input Voltage = V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1S1C 1 1 Input Voltage Range = 1-75V 1 1 Input Voltage = V 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1S15C Input Voltage Range = 1-75V Input Voltage = V 1 1 1 1 1 lfm 1 lfm lfm lfm lfm lfm - - - - KDC_NCS1C.A3 Page of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters TEMPERATURE DERATING NCS1D15C 1 Input Voltage Range = 9-3V 1 Input Voltage = 1V 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1D11C Input Voltage Range = 9-3V Input Voltage = 1V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1D115C Input Voltage Range = 9-3V Input Voltage = 1V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1D5C Input Voltage Range = 1-75V Input Voltage = V 1 1 1 1 1 lfm 1 lfm lfm lfm lfm lfm - - - - KDC_NCS1C.A3 Page 9 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters TEMPERATURE DERATING NCS1D1C 1 Input Voltage Range 1-75V 1 Input Voltage = V 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - NCS1D15C Input Voltage Range = 1-75V Input Voltage = V 1 1 1 1 1 lfm lfm lfm 1 lfm lfm lfm - - - - KDC_NCS1C.A3 Page 1 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual 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 principle 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 electrostatic forms. The latter is suppressed by the metal case, which is connected to the output return, typically a zero-volt point. 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 shows the input filter typically required to meet CISPR Quasi-PeakCurve B. C1 L1 C C3 DC DC C1, C 1μF Polyester or ceramic capacitor C3 7μF Electrolytic capacitor C & C5 1nF 5 VAC Y Rated (15nf SXX3 & SXX5) L1 1μH Common-mode choke (Murata part number 5115C) C5 C KDC_NCS1C.A3 Page 11 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters EMC FILTERING AND SPECTRA NCS1S13C NCS1S11C NCS1S3C NCS1S1C 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ NCS1S15C NCS1S115C NCS1S5C NCS1S15C 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ KDC_NCS1C.A3 Page 1 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters EMC FILTERING AND SPECTRA NCS1D15C NCS1D115C NCS1D1C 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ NCS1D11C NCS1D5C NCS1D15C 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ 7 5 3 1 1.E+5 1.E+ 1.E+7 1.E+ KDC_NCS1C.A3 Page 13 of 1
NCS1 Series Isolated 1W :1 Input Single & Dual Output DC/DC Converters PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS.77 (.) NCS1S15C XYYWW 1. (3.) PIN CONNECTIONS Pin Function Single Dual 1 Control Control -VIN -VIN 3 -VIN -VIN 9 No pin V 11 N/C -VOUT 1 +VOUT +VOUT 1 V V +VIN +VIN 3 +VIN +VIN.39 (1.) TUBE OUTLINE DIMENSIONS 1.±.15 (.±.).17-. (.-5.7). (.5). (.5).5 (.335) 3. (.9). (5.) 1 3 9 11.1 (.5) Tube length 5 (.7).5 (.7) All dimensions in mm (inches) ±.5 (.1). Quantity: 15. (15.) Bottom View RECOMMENDED FOOTPRINT DETAILS HOLES 3 1 1 1.mm Ø.5 (.1).1 (.5).1-.7 (.1-5.) Weight: 17g All dimensions in inches (mm) ±. (.5) except pin to pin tolerance ±.1 (.5). All pins on a.1 (.5) pitch and within.1 (.5) of true position. The copper case is connected to the V pin(s). 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..5 (.1) All dimensions in mm (inches) ±.5 (±.1). Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA -1151 U.S.A. ISO 91 and 11 REGISTERED /support This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http:///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. 13 Murata Power Solutions, Inc. KDC_NCS1C.A3 Page 1 of 1