NKE0303SC Ver la hoja de datos (PDF) - Unspecified
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NKE0303SC Datasheet PDF : 7 Pages
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NKE Series
Isolated Sub-Miniature 1W Single Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Rated Power
Voltage Set Point Accuracy
Line regulation
Load Regulation1
Ripple and Noise
Conditions
TA=-40°C to 120°C, see derating graphs
See tolerance envelope
High VIN to low VIN
10% load to rated load, 3.3V output types & 0309
10% load to rated load, 5V output types
10% load to rated load, 9V output types
10% load to rated load, 12V output types
10% load to rated load, 15V output types
BW=DC to 20MHz, 3.3V output types & 0305, 0505SEC, 0505DEC
BW=DC to 20MHz, other 5V output types
BW=DC to 20MHz, 9V output types
BW=DC to 20MHz, 12V output types
BW=DC to 20MHz, 15V output types
Min.
Typ.
Max.
Units
1.0
W
1.0
1.2
%/%
10
15
12
15
7.5
10
%
6.5
9.5
6.0
8.5
40
80
77
100
43
90
mV p-p
35
65
32
55
ISOLATION CHARACTERISTICS
Parameter
Conditions
Isolation test voltage
Flash tested for 1 second
Resistance
Viso= 1000VDC
Min.
Typ.
Max.
Units
3000
VDC
10
GΩ
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching frequency
All output types
Min.
Typ.
Max.
Units
115
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Specification
All output types
Storage
Case temperature rise above
0505D/S, 1205D/S
ambient
All other output types
Cooling
Free air convection
Min.
Typ.
Max.
Units
-40
85
-50
130
°C
41
32
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 NKE series of dc/dc converters are all 100% production tested at their stated isolation voltage. This is 1000V DC for 1 second.
A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?”
The NKE series has been recognized by Underwriters Laboratory for functional insulation. 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 sys-
tem. 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 materi-
als, construction and environment. While manufactured parts can 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.
SAFETY APPROVAL
The NKE series has been recognised by Underwriters Laboratory (UL) to UL 60950 for functional insulation in a maximum ambient temperature of 85ºC and/or case temperature
limit of 130ºC. Case temperature measured on the face opposite the pins. File number E151252 applies.
1. 12V input types have typically 3% less load regulation.
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KDC_NKE.K04 Page 2 of 7
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