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Murata Manufacturing Electronic Components Datasheet

NDTS4803C Datasheet

Isolated 3W Single Output DC/DC Converters

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NDTS4803C pdf
www.murata-ps.com
NDTS Series
Isolated 3W Single Output DC/DC Converters
FEATURES
„RoHS compliant
„ Industry standard footprint
„ Single isolated output
„ Short circuit protection
„ Operating temperature range –40°C to
+85°C
„ Low profile 24 pin case
„ 2:1 Wide input range
„ 5V, 12V, 24V & 48V Input
„ 3.3V, 5V, 12V & 15V Output
„ Footprint 4.73cm2
„ UL94V-0 Package materials
„ No heatsink required
„ Internal SMD construction
„ Fully encapsulated
DESCRIPTION
The NDTS series is a range of low profile DC/DC
converters offering a single regulated output over
a 2:1 input voltage range. All parts deliver 3W
output power up to 85°C without heatsinking. A
flyback oscillator design with isolated feedback
is used to give regulation over the full operating
range of 25% to 100% of full load. It is strongly
recommended that external capacitors be used
on input and output to guarantee performance
over full load and input voltage range (see
recommended filter circuit for values).
SELECTION GUIDE
Input
Voltage
Order Code V (Nom.)
NDTS0503C
5
NDTS0505C
5
NDTS0512C
5
NDTS0515C
5
NDTS1203C
12
NDTS1205C
12
NDTS1212C
12
NDTS1215C
12
NDTS2403C
24
NDTS2405C
24
NDTS2412C
24
NDTS2415C
24
NDTS4803C
48
NDTS4805C
48
NDTS4812C
48
NDTS4815C
48
Rated Output
Voltage
V
3.3
5
12
15
3.3
5
12
15
3.3
5
12
15
3.3
5
12
15
Output Current
Min. Load Full Load
mA mA
227 909
150 600
63 250
50 200
227 909
150 600
63 250
50 200
227 909
150 600
63 250
50 200
227 909
150 600
63 250
50 200
Input
Current
mA
898
806
769
757
350
320
310
310
172
156
149
147
87
83
76
75
Efficiency
(Min.)
%
63
71
76
77
71
73
75
76
71
78
80
84
71
75
80
80
Isolation
Capacitance
pF
28
30
32
33
29
32
35
32
32
32
35
35
32
32
40
40
MTTF2
kHrs
1658
1665
1650
1633
1668
1665
1650
1633
1671
1673
1650
1617
1676
1668
1631
1600
INPUT CHARACTERISTICS
Parameter
Conditions
All NDTS05 types
Voltage range
All NDTS12 types
All NDTS24 types
All NDTS48 types
All NDTS05 types
All NDTS12 types
Reflected ripple current1
All NDTS24 types
All NDTS48 types
Min. Typ. Max. Units
4.5 5
9
9 12 18
18 24 36
V
36 48 72
50 150
30 100
mA p-p
40 50
30 40
OUTPUT CHARACTERISTICS
Parameter
Conditions
Voltage set point accuracy With external input/output capacitors
Line regulation
Low line to high line with external input/
output capacitors
Load regulation
Minimum load to rated
load with external input/
output capacitors
0503, 0505,
1203, 1205
2403, 2405,
4803, 4805
12V & 15V
outputs
Ripple
BW = 20Hz to 300kHz with external input/
output capacitors
Ripple & noise
BW = DC to 20MHz with external input/output
capacitors
Min.
Typ.
±1
0.15
0.8
0.8
0.1
15
90
1. Please refer to relected ripple current measurement circuit on page 2.
2. Calculated using MIL-HDBK-217F with nominal input voltage at full load (ground benign) at 25°C.
3. Please refer to minimum load application note on page 4.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
Max.
±3
0.5
1.0
1.2
0.5
40
150
Units
%
%
%
mV rms
mV p-p
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KDC_NDTS.D06 Page 1 of 6


Murata Manufacturing Electronic Components Datasheet

NDTS4803C Datasheet

Isolated 3W Single Output DC/DC Converters

No Preview Available !

NDTS4803C pdf
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Lead temperature 1.5mm from case for 10 seconds
Minimum output load for specification3
Input voltage 05 types
Input voltage 12 types
Input voltage 24 types
Input voltage 48 types
Free air space
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
100% to 25% load, VIN Min. to Max.
NDTS Series
Isolated 3W Single Output DC/DC Converters
8 Hours
300°C
25% of rated output
10V
20V
40V
80V
10mm Min. around component
Min. Typ. Max. Units
70 650 kHz
ISOLATION CHARACTERISTICS
Parameter
Isolation voltage
Resistance
Conditions
Flash tested for 1 second
Resistance
Min. Typ. Max. Units
1000 VDC
1 GΩ
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min. Typ. Max. Units
Operation
-40 85
Storage
-50 125
Case temperature rise above ambient
in still air
NDTS0515C, NDTS1205C, NDTS1212C, NDTS1215C, NDTS2405C,
NDTS2412C, NDTS2415C, NDTS4812C & NDTS4815C
NDTS0505C, NDTS0512C, NDTS1203C, NDTS2403C, NDTS4803C &
NDTS4805C
30
40
ºC
NDTS0503C
50
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 NDTS 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 NDTS 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 NDTS 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.
RoHS COMPLIANCE INFORMATION
This series is compatible with RoHS soldering systems with a peak wave solder
temperature of 300ºC for 10 seconds. The pin termination finish on this product series
is Tin. The series is backward compatible with Sn/Pb soldering systems.
For further information, please visit www.murata-ps.com/rohs
www.murata-ps.com/support
KDC_NDTS.D06 Page 2 of 6


Part Number NDTS4803C
Description Isolated 3W Single Output DC/DC Converters
Maker Murata
Total Page 6 Pages
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