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NDL2405SC डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Isolated 2W Wide Input Single Output DC/DC Converters - Murata

भाग संख्या NDL2405SC
समारोह Isolated 2W Wide Input Single Output DC/DC Converters
मैन्युफैक्चरर्स Murata 
लोगो Murata लोगो 
पूर्व दर्शन
1 Page
		
<?=NDL2405SC?> डेटा पत्रक पीडीएफ

NDL2405SC pdf
NDL Series
Isolated 2W Wide Input Single Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Voltage set point accuracy
Line regulation
Load regulation
Ripple
Noise
Shutdown power
Conditions 1
All NDL05/12 input types with external input/output capacitors
All NDL24/48 input types with external input/output capacitors
All NDL05/12 input types, low line to high line with external input/output capacitors
All NDL24/48 input types, low line to high line with external input/output capacitors
All NDL05/12 input types, minimum load to rated load with external input/output capacitors
All NDL24/48 input types, minimum load to rated load with external input/output capacitors
B/W = 20MHz to 300kHz with external input/output capacitors
All NDL05 input types, B/W =DC to 20MHz with external input/output capacitors
All NDL12 input types, B/W =DC to 20MHz with external input/output capacitors
All NDL24/48 input types, B/W =DC to 20MHz with external input/output capacitors
+VIN nominal
Typ.
±1
±2
0.05
0.04
0.2
0.2
5
50
110
50
2.8
Max. Units
±3
%
±5
0.5
%
0.4
0.75
%
0.75
10 mV rms
100
170 mV p-p
100
mW
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
VISO = 1000VDC
Min. Typ. Max. Units
1000
VDC
1 GΩ
GENERAL CHARACTERISTICS
Parameter
Control pin (CTRL) input current
Switching frequency
Conditions
Please refer to control pin application note
Max. rated load to Min. rated load, VIN Min. to VIN. Max.
Min. Typ. Max. Units
6 10 15 mA
100 600 kHz
TEMPERATURE CHARACTERISTICS
Parameter
Operation
Storage
Cooling
Conditions
Free air convection
Min. Typ. Max. Units
-40 85
ºC
-50 130
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 NDL 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?”
For a part holding no specific agency approvals, such as the NDL 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 NDL series has an EI 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 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.
1. Refer to recommended test circuit for external input/output capacitors.
www.murata-ps.com/support
KDC_NDL.F05 Page 2 of 4

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