NMV1205DC Murata Power Solutions Inc, NMV1205DC Datasheet - Page 3

• Manufacturer Part Number: NMV1205DC
• Description: DC/DC Converters & Regulators 1W +/-5Vout +/-100mA 12Vin 3kVDC Iso DIP
• Manufacturer: Murata Power Solutions Inc
• Series: NMVr

Specifications of NMV1205DC

• Output Power: 1 W
• Input Voltage Range: 10.8 V to 13.2 V
• Input Voltage (nominal): 12 V
• Number Of Outputs: 2
• Output Voltage (channel 1): 5 V
• Output Current (channel 1): 100 mA
• Output Voltage (channel 2): - 5 V
• Output Current (channel 2): - 100 mA
• Isolation Voltage: 3 KV
• Package / Case Size: DIP
• Output Voltage: 5 V
• Product: Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION NOTES
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 NMV series of DC/DC converters are all 100% production tested at their stated isolation voltage. This is 3kVDC for 1 minute.
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 NMV series, 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 NMV 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 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
www.murata-ps.com
Minimum load
The minimum load to meet datasheet specifi cation is 10% of the full rated load across the specifi ed input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specifi ed output voltage if the output load falls to less than 5%.
Capacitive loading and start up
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 a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF.
NMV0505xC
NMV0509xC
NMV0512xC
NMV0515xC
NMV1205xC
NMV1209xC
Start-up time
11180
16270
1966
5360
1290
4140
μs
NMV1212xC
NMV1215xC
NMV1505xC
NMV1512xC
NMV1515xC
This series is compatible with RoHS soldering systems with a peak wave solder temperature of
300°C for 10 seconds. The pin termination fi nish on the SIP package type is Tin Plate, Hot Dipped
over Matte Tin with Nickel Preplate. The DIP types are Matte Tin over Nickel Preplate. Both types in
this series are backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
Start-up time
11171
8650
3510
8361
803
μs
3kVDC Isolated 1W Single & Dual Output DC/DC Converters
Technical enquiries email: [e-mail], tel: [phone]
NMV 5V, 12V & 15V Series
Typical Start-Up Wave Form
2010-09-20 KDC_NMV.G01 Page 3 of 5