MURATA NDTD0512C

NDTD Series
Isolated 3W Wide Input Dual Output DC/DC Converters
SELECTION GUIDE
Order code
FEATURES
RoHS compliant
Industry standard footprint
Power density 0.90W/cm3
2:1 Input range, 3W output power, minimum
3:1 input range with power derating to 2W
Dual isolated output
Short circuit protection
Operating temperature range -40ºC to 85ºC
Load and line regulation <1% on both
outputs
NDTD0503C
NDTD0505C
NDTD0512C
NDTD0515C
NDTD1203C
NDTD1205C
NDTD1212C
NDTD1215C
NDTD2403C
NDTD2405C
NDTD2412C
NDTD2415C
NDTD4803C
NDTD4805C
NDTD4812C
NDTD4815C
Input
voltage
V (Nom.)
V
mA
mA
5
5
5
5
12
12
12
12
24
24
24
24
48
48
48
48
±3.3
±5
±12
±15
±3.3
±5
±12
±15
±3.3
±5
±12
±15
±3.3
±5
±12
±15
±113
±75
±31
±25
±113
±75
±31
±25
±113
±75
±31
±25
±113
±75
±31
±25
±454
±300
±125
±100
±454
±300
±125
±100
±454
±300
±125
±100
±454
±300
±125
±100
Parameter
Voltage range
5V, 12V, 24V & 48V Input
3.3V, 5V, 12V & 15V Output
Internal SMD construction
Fully encapsulated
DESCRIPTION
The NDTD series is a range of low profile DC/DC
converters offering dual outputs over a 2:1 input
voltage range. All parts deliver 3W output power
up to 85ºC 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 application notes for guidance).
The plastic case is rated to UL94V-0 and encapsulant to UL94V-1 and the connection pins are
formed from a tin plated alloy 42 leadframe.
Input
Efficiency 2 Isolation
current
MTTF 3
(Min.) capacitance
full load
mA
%
pF
kHrs
890
804
764
773
343
321
311
310
170
156
148
146
86
79
76
75
67
72
76
75
73
75
78
78
73
78
82
82
72
76
80
81
30
31
36
34
30
29
32
36
30
30
35
41
30
30
35
36
1644
1640
1625
1609
1668
1665
1650
1633
1671
1675
2075
2080
1667
1669
2090
2045
INPUT CHARACTERISTICS
No heatsink required
1kVDC isolation
Output current
Rated output
voltage
Min. Load 1 Full load
Reflected ripple current 4
Conditions
Min.
Typ.
Max.
5V input types
12V input types
24V input types
48V input types
5V input types
12V, 24V & 48V input types
4.5
9
18
36
5
12
24
48
40
30
9
18
36
75
90
40
Units
VDC
mA p-p
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
Lead temperature 1.5mm from case for 10 seconds
Minimum output load for specification1
Input voltage 5V types
Input voltage 12V types
Input voltage 24V types
Input voltage 48V types
Free air space
8 hours
300°C
25% of rated output
10V
20V
40V
80V
10mm Min. around component
1. Please refer to minimum load application note section on page 4.
2. Measured at full load with external input/output capacitors, refer to test circuit.
3. Calculated using MIL-HDBK-217F with nominal input voltage at full load (ground benign) at 25°C.
4. Please refer to reflected ripple current measurement circuit on page 3.
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
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Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTD_E03 Page 1 of 7
NDTD Series
Isolated 3W Wide Input Dual Output DC/DC Converters
OUTPUT CHARACTERISTICS
Parameter
Conditions
Min.
3.3V & 5V outputs
12V & 15V outputs
Typ.
Max.
Units
±2
±1
±5
±3
%
Voltage set point accuracy
With external input/output capacitors
Line regulation
Low line to high line with external input/output capacitors
0.15
0.5
%
25% load to 100% load with external input/output 3.3V & 5V outputs
capacitors with balanced load
12V & 15V outputs
BW = 20Hz to 300kHz with external input/output capacitors
BW = DC to 20MHz with external input/output capacitors
0.5
0.2
15
90
1.0
0.5
40
150
%
%
mV rms
mV p-p
Load regulation
Ripple
Ripple & noise
Cross regulation
% voltage change on negative output when
positive load varies from 12% to 50% of 3W rating,
with negative load fixed at 50%
NDTD05XXC, NDTD1203C,
NDTD1205C, NDTD2403C,
NDTD2405C, NDTD4803C,
NDTD4805C
5.0
%
NDTD1212C, NDTD1215C,
NDTD2412C, NDTD2415C,
NDTD4812C, NDTD4815C
2.1
Short circuit protection
Continuous
GENERAL CHARACTERISTICS
Parameter
Conditions
Switching frequency
Min.
100% to 25% load, VIN min to max
Typ.
60
TEMPERATURE CHARACTERISTICS
Parameter
Conditions
Min.
Operation
Storage
-40
-50
Case temperature rise above
ambient in still air
3.0
NDTD0503
NDTD1203C, NDTD2403C, NDTD4803C
NDTD0505C, NDTD0512C, NDTD1205C, NDTD2405C, NDTD4805C
NDTD0515C, NDTD1212C, NDTD1215C, NDTD2412C, NDTD4812C, NDTD2415C,
NDTD4815C
Typ.
Max.
Units
620
kHz
Max.
Units
85
130
54
40
35
ºC
28
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Isolation voltage
Resistance
Flash tested for 1 second
Viso=1KVDC
1000
1
Typ.
Max.
Units
VDC
GΩ
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 NDTD 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 NDTD 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 NDTD 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.
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KDC_NDTD_E03 Page 2 of 7
NDTD Series
Isolated 3W Wide Input Dual Output DC/DC Converters
TERMINOLOGY
LINE REGULATION
The percentage change in output voltage between low intput voltage and high intput voltage, measured with fixed output load i.e. a 5V part with an output voltage of 5.05V @ high
input voltage and 5.03V @ low input voltage would have a line regulation of 0.4%.
VOUT (Low Input V) - VOUT (High Input V)
Line regulation =
VOUT (Nominal Input V)
x100%
Where VOUT (Nominal Input V) is 5V.
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
100μF, 25V (0.25Ω at 100kHz)
47μF, 25V (0.4Ω at 100kHz)
Test circuit
+ VOUT
COUT
+ VIN
Supply + VIN
CIN
NDTD
Supply - VIN
OV
COUT
- VIN
- VOUT
Reflected Ripple Current Measurement
12μH
Current
Probe
Supply +VIN
+VIN
C1
Supply -VIN
+VOUT
NDTD
CIN
-VIN
COUT
Load
COUT
Load
OV
-VOUT
C1 = 220μF, ESR < 0.1Ω at 100kHz
Cross Regulation
Load regulation is at its best when the positive and negative loads are balanced. When the loads are asymmetric, the negative output is not as tightly regulated as the positive output. To meet ripple specification a total minimum load of 25% full load is required, however, the NDTD can be used with much lighter loading at the expense of increased ripple. A
small load is required on the negative output of 150mW to ensure the maximum negative output voltage is not exceeded.
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KDC_NDTD_E03 Page 3 of 7
NDTD Series
Isolated 3W Wide Input Dual 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: NDTD0512C, NDTD0515C, NDTD1212C, and NDTD1215C.
NDTD05XXC
45
40
35
0503
Minimum Load (mA)
30
25
20
0505
15
10
5
0
6
7
8
9
Input Voltage (V)
NDTD12XXC
50
45
40
Minimum Load (mA)
35
1203
30
25
1205
20
15
10
5
0
6
www.murata-ps.com
8
10
12
Input Voltage (V)
14
16
18
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KDC_NDTD_E03 Page 4 of 7
NDTD Series
Isolated 3W Wide Input Dual Output DC/DC Converters
APPLICATION NOTES (continued)
NDTD24XXC
70
60
Minimum Load (mA)
50
40
2403
30
2405
20
2415
10
2412
0
11
12
16
20
24
28
32
36
Input Voltage (V)
NDTD48XXC
45
40
35
4803
Minimum Load (mA)
30
25
4805
20
15
4812
10
4815
5
0
32
40
48
56
64
72
Input Voltage (V)
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KDC_NDTD_E03 Page 5 of 7
NDTD Series
Isolated 3W Wide Input Dual Output DC/DC Converters
APPLICATION NOTES (continued)
NDTD Power Derating
The NDTD series will operate from a wider input range than specified in the input characteristics datasheet table with output power derating.
NDTD12XXC
5
5
4
4
Output Power (W)
Output Power (W)
NDTD05XXC
3
2
1
0
3
Input voltage (V)
1
9
Input voltage (V)
18
NDTD48XXC
5
5
4
4
Output Power (W)
Output Power (W)
NDTD24XXC
2
0
5
9
4.5
3
3
2
1
0
11
18
Input voltage (V)
36
3
2
1
0
20
36
Input voltage (V)
75
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_NDTD_E03 Page 6 of 7
NDTD Series
Isolated 3W Wide Input Dual Output DC/DC Converters
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS
1.270
(32.26)
NDTD2412C
7*/
07 07
0.577
(14.66)
XYYWW
0.100
(2.54)
7*/
7*/ 7*/ 0.200
(5.08)
7065 7065
Pin
Function
2
3
9
11
14
16
22
23
-VIN
-VIN
OV
-VOUT
+VOUT
OV
+VIN
+VIN
0.27 (7.00)
0.185 (4.70)
0.145 (3.70)
RECOMMENDED FOOTPRINT DETAILS
0.029 (0.73)
0.025 (0.63)
0.185
(4.70)
)0-&4
0.900
(22.86)
 0.012 (0.30)
0.008 (0.20)
0.600
(15.25)
MAX
Weight: 6.0g
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
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
USA:
Mansfield (MA), Tel: (508) 339 3000, email: [email protected]
Canada:
Toronto, Tel: (866) 740 1232, email: [email protected]
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]
China:
Shanghai, Tel: +86 215 027 3678, email: [email protected]
Guangzhou, Tel: +86 208 221 8066, email: [email protected]
www.murata-ps.com email: [email protected] ISO 9001 & ISO 14001 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
Singapore: Parkway Centre, Tel: +65 6348 9096, email: [email protected]
Technical enquiries - email: [email protected], tel: +44 (0)1908 615232
KDC_NDTD_E03 Page 7 of 7