NCM Series FEATURES UL9 Reinforced Insulation ANSI/AAMI ES-, MOPP/ MOOP s recognised : Wide range voltage input Operating temperature range C to 8 C.kVDC isolation Hi Pot Test Typical efficiency to 88% V, V & 8V Nominal input Power density.9w/cm mm creepage guaranteed Under voltage lock out Control pin option PRODUCT OVERVIEW The NCM series of DC/DC converters offers single & dual output voltages from wide input voltage ranges ranges of.-9, 9-V & 8-7V.. The NCM is housed in an industry standard package with a standard pinout. The NCM is encapsulated for superior thermal performance. Applications include medical, telecommunication battery powered systems, process control and distributed power systems. SELECTION GUIDE Input Voltage Output Output Efficiency Efficiency Isolation Voltage Current Capacitance Order Code Nom. V/V/8V Input Input MTTF V V A Min. Typ. Min. Typ. % % % % pf Hrs NCMDC ± ±. 78 8 9, NCMDC ± ±. 8 8 7,7 NCMDC ± ±. 8 8, NCMSC.. 7 7 8,8 NCMSC. 77 8 7, NCMSC. 8 8 8,8 NCMSC. 8 8,7 NCMDC ± ±. 8 8 79 8 8, NCMDC ± ±. 8 88 8 8,88 NCMDC ± ±. 8 87 8 8, NCMSC.. 7 79 7 77 8, NCMSC. 8 8 79 8 7, NCMSC. 8 8 8 8 9,87 NCMSC. 8 87 8 8 7, NCMD8C 8 ± ±. 77 8 79 8 9,9 NCMD8C 8 ± ±. 78 8 8 8,9 NCMD8C 8 ± ±. 8 8 8 8 9,8 NCMS8C 8.. 7 7 7 7,88 NCMS8C 8. 7 78 7 8 7,79 NCMS8C 8. 79 8 8 8, NCMS8C 8. 8 8 8 8 99,88 SELECTION GUIDE (Continued) Input Current Ripple & Noise % Load % Load % Load % Load Order Code Typ. V, V or 8V Input Typ. Input Typ. ma ma ma ma mvp/p NCMDC NCMDC NCMDC NCMSC 8 NCMSC NCMSC 9 NCMSC 9 NCMDC 9 NCMDC NCMDC 7 NCMSC 9 7 NCMSC 9 NCMSC 7 7 NCMSC 7 NCMD8C 7 NCMD8C 8 9 NCMD8C 8 NCMS8C 7 7 NCMS8C 7 NCMS8C 9 7 NCMS8C 9 For full details go to /rohs To order with optional control pin insert an E prior to the suffix C, i.e. NCMSEC. Calculated using MIL-HDBK-7F FN, parts stress method with nominal input voltage at full load.. V inputs have a : input range. All specifications typical at TA= C, nominal input voltage and rated output current unless otherwise specified. KDC_NCMC.C Page of 9
INPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units NCMX. 9 Voltage range NCMX 9 V NCMX8 8 8 7 Turn on threshold NCMX. Turn off threshold NCMX. Under voltage lock out Turn on threshold NCMX 8. Turn off threshold NCMX. V Turn on threshold NCMX8 Turn off threshold NCMX8.7 Reflected ripple current All variants ma p-p ISOLATION CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Isolation test voltage Flash tested VDC Resistance Viso = kvdc GΩ OUTPUT CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Rated power V, V & V output types.v output types W Voltage set point accuracy Line regulation Load Regulation Cross Regulation Minimum output load for specification (see application notes) D8C & D8C, SXXC, SXXC & SXXC ± SXXC ±. DC & DC ± DC, DC, DC, Positive ± DC & D8C Negative ± Low line to high line % total load to % total load % voltage change on negative output when positive load varies from.% to 7.% with negative load fixed at % % of rated load Peak deviation - Single Output (- & 7-% swing) Peak deviation - Dual Output (.-7.% & 7.-.% swing) Single.. Dual..7 NCMxxxC, DC & DC. NCMxxxC. NCMSxxC, NCMSxxC, DC, DC, D8C & D8C.. V V & V SXXC SXXC 8 S8 % % % % Transient Response D, S & S D & D %Vout D D, D & S8 D8 & D8 9 D8 S & S Settling time (within % Vout Nom.) μs KDC_NCMC.C Page of 9
ABSOLUTE MAXIMUM RATINGS Short-circuit protection (for SELV input voltages) Continuous Lead temperature.mm from case for seconds (to JEDEC JESD-B ISS C) C Input voltage, NCMX V Input voltage, NCMX V Input voltage, NCMX8 8V Control pin input voltage ±V GENERAL CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Switching frequency khz Control pin input Module on (or pin unconnected). Module off. V TEMPERATURE CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Operation - 8 Storage - D, D, D, D8, S, S, S8, S8 Case temperature rise above ambient D, D8, S, S C D, D, D8, S, S,, 8, 8 SC 7 Thermal shutdown Case Temperature + RoHS COMPLIANCE INFORMATION This series is compatible with RoHS soldering systems with a peak wave solder temperature of ºC for seconds. The pin termination finish on this product series is a Gold flash (.-. micron) over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems. For further information, please visit /rohs KDC_NCMC.C Page of 9
APPLICATION NOTES Output Capacitance and start-up times The NCM series does not require output capacitors to meet datasheet specification. To meet datasheet specification, output capacitance should not exceed: Part No. Maximun Load Capacitance (per output) Start-up times μf ms NCMDC NCMDC NCMDC 8 NCMSC 7 NCMSC 7 NCMSC NCMSC 7 NCMDC NCMDC NCMDC 7 NCMSC 7 NCMSC NCMSC NCMSC 7 NCMD8C NCMD8C NCMD8C NCMS8C 7 NCMS8C NCMS8C NCMS8C Control Pin This provides an OFF function which puts the converter into a low power mode when >V is applied to the pin. When the control pin is left un-connected or less than V the converter is ON Minimum Load The minimum load to meet full datasheet specification is % of the full rated load across the specified input voltage range. Between % and % output loading, the output voltage will remain within data sheet specification however, output ripple and noise may increase but will still be below mv p-p. 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 NCM series of DC/DC converters are all % production tested at their stated isolation voltage. This is.kvdc for second. A question commonly asked is, What is the continuous voltage that can be applied across the part in normal operation? The NCM series has been recognized by Underwriters Laboratory to Vrms for Reinforced Insulation. 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. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by % from specified test voltage. KDC_NCMC.C Page of 9
SAFETY APPROVAL ANSI/AAMI ES- The NCM series has been recognised by Underwriters Laboratory (UL) to ANSI/AAMI ES- and provides MOPP (Means Of Patient Protection) and MOOP (Means Of Operator Protection) based upon a working voltage of Vrms max., between Primary and Secondary. File number E89 applies. UL 9 The NCM series has been recognised by Underwriters Laboratory (UL) to UL 9 for reinforced insulation to a working voltage of Vrms. File number E applies. FUSING The NCM Series of converters are not internally fused so to meet the requirements of UL an anti-surge input line fuse should always be used with ratings as defined below. Input Voltage, V A Input Voltage, V A Input Voltage, 8V A All fuses should be UL recognized 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. C μf X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of times the output voltage of the DC/DC converter μf tantalum capacitor, voltage rating to be a minimum of. times the output voltage of the DC/DC converter with an ESR of less C than mω at khz C nf multilayer ceramic capacitor, general purpose R Ω resistor, carbon film, ±% tolerance R Ω BNC termination T T 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 to obtain the specified values. Differential Mode Noise Test Schematic DC/DC Converter SUPPLY + + Input Output C C C R T R OSCILLOSCOPE Y INPUT - - R LOAD KDC_NCMC.C Page of 9
EFFIECIENCY VS LOAD NCMDC NCMDC 9% 8% 8%.V V 7%.V V 7% % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMDC NCMSC 8% 8% 7% 7%.V V % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMSC NCMSC 8% 8% 7%.V V 7%.V V % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMSC NCMDC 9% 8% 8% 7%.V V 7% % % V V % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % KDC_NCMC.C Page of 9
EFFIECIENCY VS LOAD NCMDC NCMDC 9% 9% 8% % V V 7% % % V V % % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMSC NCMSC 9% 8% 8% 7% % 7% % % % V V % % V V % % % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMSC NCMSC 9% 9% 8% 8% 7% % % V V 7% % % V V % % % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMD8C NCMD8C 9% 8% 7% % % % 8V 8V 7V % 8V 8V 7V % % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % KDC_NCMC.C Page 7 of 9
EFFIECIENCY VS LOAD NCMD8C NCMS8C 9% 8% 7% % 8V 8V 7V % % % % 8V 8V 7V % % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMS8C NCMS8C 9% 9% 8% 8% 7% 7% % % 8V 8V 7V % % 8V 8V 7V % % % % % % % % % 7% 8% 9% % % % % % % % % 7% 8% 9% % NCMS8C 9% 8% 7% % % 8V 8V 7V % % % % % % % % 7% 8% 9% % KDC_NCMC.C Page 8 of 9
TEMPERATURE DERATING NCMSC NCMSC lfm lfm lfm lfm lfm lfm ---- 78 - - 8 NCMS8C NCMXC lfm lfm lfm lfm lfm lfm - - 8 - - 8 Ambient Temperature ( O C NCMXC NCMXC lfm lfm lfm lfm lfm lfm - - 8 - - 8 NCMXC NCMXC lfm lfm lfm lfm lfm lfm - - 8 - - 8 KDC_NCMC.C Page 9 of 9
TEMPERATURE DERATING NCMXC NCMX8C lfm lfm lfm lfm lfm lfm - - 8 - - 8 NCMX8C NCMX8C lfm lfm lfm lfm lfm lfm - - 8 - - 8 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. 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. KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA EMC FILTER AND VALUES TO OBTAIN SPECTRA AS SHOWN The following filter circuit and filter table shows the input filters typically required to meet EN Quasi-PeakCurve A or B. L L C L C C C DC DC C, C Polyester or ceramic capacitor C Electrolytic capacitor C & C VAC Y Rated C TO MEET CURVE B Part Number C C C C C L L L NCMSC μf μf μf nf nf C μh Not required NCMSC μf μf μf nf nf C μh Not required NCMSC μf μf μf nf nf C μh μh NCMSC μf μf μf nf nf C μh μh NCMDC μf μf μf nf nf C μh Not required NCMDC μf μf μf nf nf C μh Not required NCMDC μf μf μf nf nf C μh Not required NCMSC μf μf 7μF nf nf C Not required Not required NCMSC μf μf 7μF nf nf C μh Not required NCMSC μf μf 7μF nf nf C μh Not required NCMSC μf μf 7μF nf nf C μh Not required NCMDC μf μf 7μF nf nf C Not required Not required NCMDC μf μf 7μF nf nf C Not required Not required NCMDC μf μf 7μF nf nf C μh Not required NCMS8C μf μf 7μF nf nf C Not required Not required NCMS8C μf μf 7μF nf nf C Not required Not required NCMS8C μf μf 7μF nf nf C Not required Not required NCMS8C μf μf 7μF nf nf C Not required Not required NCMD8C μf μf 7μF nf nf C Not required Not required NCMD8C μf μf 7μF nf nf C μh Not required NCMD8C μf μf 7μF nf nf C Not required Not required KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA TO MEET CURVE A Part Number C C C C C L L L NCMSC μf μf μf Not required Not required C μh μh NCMSC μf μf μf Not required Not required C μh μh NCMSC μf μf μf Not required Not required C μh μh NCMSC μf μf μf Not required Not required C μh μh NCMDC μf μf μf Not required Not required C μh μh NCMDC μf μf μf Not required Not required C μh μh NCMDC μf μf μf Not required Not required C μh μh NCMSC μf μf 7μF Not required Not required C μh μh NCMSC μf μf 7μF Not required Not required C μh μh NCMSC μf μf 7μF Not required Not required C μh μh NCMSC μf μf 7μF Not required Not required C μh μh NCMDC μf μf 7μF Not required Not required C μh μh NCMDC μf μf 7μF Not required Not required C μh μh NCMDC μf μf 7μF Not required Not required C μh μh NCMS8C μf μf 7μF Not required Not required C μh μh NCMS8C μf μf 7μF Not required Not required C μh μh NCMS8C μf μf 7μF Not required Not required C μh μh NCMS8C μf μf 7μF Not required Not required C μh μh NCMD8C μf μf 7μF Not required Not required C μh μh NCMD8C μf μf 7μF Not required Not required C μh μh NCMD8C μf μf 7μF Not required Not required C μh μh KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA NCMDC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMDC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMDC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMSC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMDC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA NCMDC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMDC 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMS8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMS8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 KDC_NCMC.C Page of 9
EMC FILTERING AND SPECTRA NCMS8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMS8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMD8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 NCMD8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 KDC_NCMC.C Page 7 of 9
EMC FILTERING AND SPECTRA NCMD8C 8 7.E+.E+.E+7.E+8 8 7.E+.E+.E+7.E+8 KDC_NCMC.C Page 8 of 9
PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS. (.787) NCMSC XYYWW. (.) PIN CONNECTIONS Pin Function Single Dual * ON/OFF ON/OFF -VIN -VIN N/C -VOUT +VOUT +VOUT -VOUT OV +VIN +VIN +VIN +VIN.7 [.] MAX. [.] MAX TUBE OUTLINE DIMENSIONS.±. (.±.).7. [..7 ] 8. (.). (.9)..9[.8.7 ]. [.]. (.87) Tube length.7 ()) All dimensions in inches ±. (mm.mm). Quantity:.. [..9 ] *. [.] RECOMMENDED FOOTPRINT DETAILS 7 HOLES.mm. (.) Ø. [.].8 [.].8 [.9] * Optional control pin. All dimensions in millimetres (inches) ±. (.) except pin to pin tolerance ±. (.). All pins on a. (.) pitch and within. (.) of true position. Case material: plastic. Weight:.g *. (.) All dimensions in millimetres ±. (±. inches). Murata Power Solutions, Inc. Cabot Boulevard, Mansfield, MA 8- U.S.A. ISO 9 and 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. Murata Power Solutions, Inc. KDC_NCMC.C Page 9 of 9