MURATA KDC_NDTS

NDTS Series
Isolated 3W Single Output DC/DC Converters
SELECTION GUIDE
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
Order Code
Input
Voltage
V (Nom.)
NDTS0503C
NDTS0505C
NDTS0512C
NDTS0515C
NDTS1203C
NDTS1205C
NDTS1212C
NDTS1215C
NDTS2403C
NDTS2405C
NDTS2412C
NDTS2415C
NDTS4803C
NDTS4805C
NDTS4812C
NDTS4815C
5
5
5
5
12
12
12
12
24
24
24
24
48
48
48
48
Parameter
Voltage range
Reflected ripple current1
UL94V-0 Package materials
No heatsink required
Internal SMD construction
Fully encapsulated
227
150
63
50
227
150
63
50
227
150
63
50
227
150
63
50
909
600
250
200
909
600
250
200
909
600
250
200
909
600
250
200
898
806
769
757
350
320
310
310
172
156
149
147
87
83
76
75
63
71
76
77
71
73
75
76
71
78
80
84
71
75
80
80
28
30
32
33
29
32
35
32
32
32
35
35
32
32
40
40
1658
1665
1650
1633
1668
1665
1650
1633
1671
1673
1650
1617
1676
1668
1631
1600
Conditions
Min.
Typ.
Max.
All NDTS05 types
All NDTS12 types
All NDTS24 types
All NDTS48 types
All NDTS05 types
All NDTS12 types
All NDTS24 types
All NDTS48 types
4.5
9
18
36
5
12
24
48
50
30
40
30
9
18
36
72
150
100
50
40
Units
Typ.
Max.
Units
±1
±3
%
0.15
0.5
%
0503, 0505,
1203, 1205
0.8
1.0
2403, 2405,
4803, 4805
0.8
1.2
12V & 15V
outputs
0.1
0.5
BW = 20Hz to 300kHz with external input/
output capacitors
15
40
mV rms
BW = DC to 20MHz with external input/output
capacitors
90
150
mV p-p
V
mA p-p
OUTPUT CHARACTERISTICS
Parameter
Conditions
Voltage set point accuracy
With external input/output capacitors
Low line to high line with external input/
output capacitors
Line regulation
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).
3.3
5
12
15
3.3
5
12
15
3.3
5
12
15
3.3
5
12
15
Input Efficiency Isolation
MTTF2
Current
(Min.) Capacitance
mA
%
pF
kHrs
INPUT CHARACTERISTICS
3.3V, 5V, 12V & 15V Output
Footprint 4.73cm2
Output Current
Rated Output
Voltage
Min. Load Full Load
V
mA
mA
Load regulation
Ripple
Ripple & noise
Min.
Minimum load to rated
load with external input/
output capacitors
%
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.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTS_D02 Page 1 of 6
NDTS Series
Isolated 3W Single Output DC/DC Converters
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
Conditions
Switching frequency
100% to 25% load, VIN Min. to Max.
8 Hours
300°C
25% of rated output
10V
20V
40V
80V
10mm Min. around component
Min.
Typ.
70
Max.
Units
650
kHz
Max.
Units
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation voltage
Resistance
Flash tested for 1 second
Resistance
1000
1
Conditions
Min.
Typ.
VDC
GΩ
TEMPERATURE CHARACTERISTICS
Parameter
Operation
Storage
Case temperature rise above ambient
in still air
Typ.
-40
-50
NDTS0515C, NDTS1205C, NDTS1212C, NDTS1215C, NDTS2405C,
NDTS2412C, NDTS2415C, NDTS4812C & NDTS4815C
Max.
30
NDTS0505C, NDTS0512C, NDTS1203C, NDTS2403C, NDTS4803C &
NDTS4805C
NDTS0503C
Units
85
130
ºC
40
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
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTS_D02 Page 2 of 6
NDTS Series
Isolated 3W Single Output DC/DC Converters
APPLICATION NOTES
Recommended Input & Output Capacitors
Although these converters will work without external capacitors, they are necessary in order to guarantee the full parametric performance over the full line and load range. All
parts have been tested and characterized using the following values and test circuit.
Input Voltage
5V, 12V
24V, 48V
CIN
100μF, 25V (0.25Ω at 100kHz)
10μF, 100V (1.5Ω at 100kHz)
Output Voltage
3.3V, 5V
12V, 15V
COUT
220μF, 16V (0.12Ω at 100kHz)
100μF, 25V (0.25Ω at 100kHz)
Test circuit
+ VOUT
+ VIN
Supply + VIN
CIN
NDTS
Supply - VIN
COUT
- VIN
- VOUT
Reflected Ripple Current Measurement
12μH
Current
Probe
+ VIN
Supply + VIN
C1
Supply - VIN
+ VOUT
NDTS
CIN
- VIN
COUT
Load
- VOUT
C1 = 220μF, ESR < 0.1Ω at 100kHz
www.murata-ps.com
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTS_D02 Page 3 of 6
NDTS Series
Isolated 3W Single Output DC/DC Converters
APPLICATION NOTES (continued)
Minimum Load
The minimum load for correct operation is 25% of the full rated load across the specified input voltage range. Lower loads may cause a significant increase in output ripple and
may cause the output voltage to exceed its specification transiently during power-down when the input voltage also falls below its rated minimum.
The following graphs show the typical required minimum load required for stable operation in mA verses input voltage. Some variants are not included as they do not typically
require a minimum load for stable operation: NDTD1212C, and NDTD1215C.
The NDTS series will operate from a wider input range than specified in the input characteristics datasheet table with output power derating. Please contact Murata Power
Solutions for further information.
NDTD05XXC
200
180
Minimum Load (mA)
160
0503
140
120
0505
100
80
60
0512
40
20
0
4.5
0515
5.5
6.5
7.5
8.5
9.5
10.5
11.5
Input Voltage (V)
NDTD12XXC
Minimum Load (mA)
1203
1205
9
11
13
15
17
19
21
Input Voltage (V)
www.murata-ps.com
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTS_D02 Page 4 of 6
NDTS Series
Isolated 3W Single Output DC/DC Converters
APPLICATION NOTES (continued)
NDTD24XXC
200
180
160
Minimum Load (mA)
140
120
2403
100
80
2405
60
40
2415
24 12
20
0
10
15
20
25
30
35
40
45
Input Voltage (V)
NDTD48XXC
120
100
Minimum Load (mA)
0503
80
60
0505
40
0512
0515
20
0
30
35
40
45
50
55
60
65
70
75
80
Input Voltage (V)
www.murata-ps.com
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTS_D02 Page 5 of 6
NDTS Series
Isolated 3W Single Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
1.270 (32.26)
0.200 (5.08)
NDTS2412C
XYYWW
7*/
7*/ 7*/ 7*/
/" 7065
/$ 7065
0.577 (14.66)
0.100 (2.54)
0.275 (7.00)
0.185 (4.70)
0.145 (3.70)
Pin
Function
2
3
9
11
14
16
22
23
-VIN
-VIN
NA
NC
+VOUT
-VOUT
+VIN
+VIN
NA - Not available for
electrical connection.
NC - No internal connection.
RECOMMENDED FOOTPRINT DETAILS
0.029 (0.73)
0.025 (0.63)
)0-&4
0.900 (22.86)
0.185 (4.70)
 0.012 (0.30)
0.008 (0.20)
0.600 (15.25)
Weight: 6.2g
All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch and within ±0.01 (0.25) of true position.
All dimensions in inches ±0.01 (mm ±0.25mm). All pins on a 0.1 (2.54) pitch and within ±0.01
(0.25) of true position.
TUBE OUTLINE DIMENSIONS
œœ
œœ
œœ
œœ
œœ
œœ
œœ
All dimensions in inches ±0.01 (mm) ±0.5mm.
Tube length : 20.47±0.079 (520mm ±2mm).
Tube Quantity : 15
USA:
Tucson (Az), Tel: (800) 547 2537, email: [email protected]
Canada: Toronto, Tel: (866) 740 1232, email: [email protected]
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: [email protected] ISO 9001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2008 Murata Power Solutions, Inc.
www.murata-ps.com
UK:
Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected]
France:
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected]
Germany: München, Tel: +49 (0)89-544334-0, email: [email protected]
Japan:
Tokyo, Tel: 3-3779-1031, email: [email protected]
Osaka, Tel: 6-6354-2025, email: [email protected]
Website: www.murata-ps.jp
China:
Shanghai, Tel: +86 215 027 3678, email: [email protected]
Guangzhou, Tel: +86 208 221 8066, email: [email protected]
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTS_D02 Page 6 of 6