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
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All enquiries: www.murata-ps.com/support
KDC_NCM6C.C01
Page 3 of 19
NCM6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
APPLICATION NOTES
Output Capacitance and start-up times
The NCM6 series does not require output capacitors to meet datasheet specification. To meet datasheet specification, output capacitance should not exceed:
Part No.
NCM6D0505C
NCM6D0512C
NCM6D0515C
NCM6S0503C
NCM6S0505C
NCM6S0512C
NCM6S0515C
NCM6D1205C
NCM6D1212C
NCM6D1215C
NCM6S1203C
NCM6S1205C
NCM6S1212C
NCM6S1215C
NCM6D4805C
NCM6D4812C
NCM6D4815C
NCM6S4803C
NCM6S4805C
NCM6S4812C
NCM6S4815C
Maximun Load Capacitance (per output)
μF
220
100
100
470
220
100
100
220
100
100
470
220
100
100
220
100
100
470
220
100
100
Start-up times
ms
6
12
18
4
7
12
17
5
12
17
2
6
14
17
10
40
60
2
5
15
20
Control Pin
This provides an OFF function which puts the converter into a low power mode when >3V is applied to the pin. When the control pin is left un-connected or less than 1V the
converter is ON
Minimum Load
The minimum load to meet full datasheet specification is 10% of the full rated load across the specified input voltage range.
Between 0% and 10% output loading, the output voltage will remain within data sheet specification however, output ripple and noise may increase but will still be below
150mV 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 NCM6 series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 5.2kVDC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NCM6 series has been recognized by Underwriters Laboratory to 250Vrms 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 20% from specified test voltage.
www.murata-ps.com
All enquiries: www.murata-ps.com/support
KDC_NCM6C.C01
Page 4 of 19
NCM6 Series
Isolated 6W Wide Input Single & Dual Output DC/DC Converters
SAFETY APPROVAL
ANSI/AAMI ES60601-1
The NCM6 series has been recognised by Underwriters Laboratory (UL) to ANSI/AAMI ES60601-1 and provides 1 MOPP (Means Of Patient Protection) and 2 MOOP (Means Of
Operator Protection) based upon a working voltage of 250 Vrms max., between Primary and Secondary. File number E202895 applies.
UL 60950
The NCM6 series has been recognised by Underwriters Laboratory (UL) to UL 60950 for reinforced insulation to a working voltage of 250Vrms. File number E151252 applies.
FUSING
The NCM6 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, 5V
3A
Input Voltage, 12V 2A
Input Voltage, 48V 1A
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.
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.
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