Isolated 1W Regulated Single Output DC/DC Converters
SELECTION GUIDE
Order Code
NMF0505DC
NMF0509DC
NMF0512DC
NMF0515DC
NMF0505SC
NMF0509SC
NMF0512SC
NMF0515SC
NMF1205SC
NMF1209SC
NMF1212SC
NMF1215SC
NMF1205SC
NMF1209SC
NMF1212SC
NMF1215SC
NMF2405DC
NMF2409DC
NMF2412DC
NMF2415DC
NMF2405SC
NMF2409SC
NMF2412SC
NMF2415SC
NMF4805DC
NMF4809DC
NMF4812DC
NMF4815DC
NMF4805SC
NMF4809SC
NMF4812SC
NMF4815SC
Nominal
Input
Voltage
V
5
5
5
5
5
5
5
5
12
12
12
12
12
12
12
12
24
24
24
24
24
24
24
24
48
48
48
48
48
48
48
48
Output
Voltage
V
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
5
9
12
15
Output
Current
mA
100
100
83
67
100
100
83
67
100
100
83
67
100
100
83
67
100
100
83
67
100
100
83
67
100
100
83
67
100
100
83
67
Power Out
mW
500
900
1000
1000
500
900
1000
1000
500
900
1000
1000
500
900
1000
1000
500
900
1000
1000
500
900
1000
1000
500
900
1000
1000
500
900
1000
1000
Efficiency
%
50
62
62
62
50
62
62
62
50
62
62
62
50
62
62
62
50
62
62
62
50
62
62
62
50
62
62
62
50
62
62
62
Isolation
MTTF
1
Package
Capacitance
Style
pF
kHrs
37
42
46
52
37
42
46
52
62
82
98
108
62
82
98
108
69
106
129
151
69
106
129
151
51
86
108
127
51
86
108
127
1307
825
512
316
1307
825
512
316
456
379
290
218
456
379
290
218
843
613
422
279
843
613
422
279
200
283
162
135
200
283
162
135
DIP
FEATURES
n
compliant
RoHS
n
Output regulation <1.5%
n
Output programmable
n
Power density 0.85W/cm
3
n
Single isloated output
n
& DIP package styles
SIP
n
94V-0 package material
UL
n
heatsink required
No
n
Footprint from 1.17cm
2
n
1kVDC isolation
n
12V, 24V & 48V input
5V,
n
9V, 12V & 15V output
5V,
n
construction
SMD
n
encapsulated with toroidal magnetics
Fully
n
external components required
No
n
MTTF up to 2.4 million hours
n
mounting
PCB
SIP
DIP
SIP
DIP
SIP
DIP
SIP
DESCRIPTION
The NMF series of DC/DC converters is used
where a tightly regulated supply is required. They
are ideal for situations where the intput voltage is
not tightly controlled. The output trim pin makes
the device particularly suitable for applications
requiring a programmable output voltage. The 5V
output version can be used to give a regulated
output, adjustable between 1.2V and 5.0V with a
single resistor.
When operated
with
additional external load capacitance the rise time of the input voltage will determine the maximum external
capacitance value for guaranteed start up. The slower the rise time of the input voltage the greater the maximum value of the
additional external capacitance for reliable start up.
ABSOLUTE MAXIMUM RATINGS
Short-circuit protection
2
Lead temperature 1.5mm from case for 10 seconds
Internal power dissipation
Input voltage V
IN
, NMF05 types
Input voltage V
IN
, NMF12 types
Input voltage V
IN
, NMF24 types
Input voltage V
IN,
NMF48 types
1 second
300°C
450mW
7V
15V
28V
54V
1. Calculated using MIL-HDBK-217F with nominal input voltage at full load.
2. Supply voltage must be discontinued at the end of the short circuit duration.
All specifications typical at T
A
=25°C, nominal input voltage and rated output current unless otherwise specified.
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KDC_NMFC.4
Page 1 of 4
NMF SERIES
Isolated 1W Regulated Single Output DC/DC Converters
INPUT CHARACTERISTICS
Parameter
Voltage range
Conditions
Continuous operation, 5V input types
Continuous operation, 12V input types
Continuous operation, 24V input types
Continuous operation, 48V input types
MIN.
4.75
11.4
22.8
45.6
TYP.
5
12
24
48
MAX.
5.25
12.6
25.2
50.4
Units
V
OUTPUT CHARACTERISTICS
Parameter
Voltage set point accuracy
Rated power
1
Line regulation
Load regulation
Ripple & noise
Conditions
100% load
T
A
= 0
°C
to 70
°C
High V
IN
to low V
IN
10% load to rated load
BW=DC to 20MHz, all output types
MIN.
TYP.
MAX.
5
1
0.25
1.5
60
Units
%
W
%/%
%
mV p-p
0.9
ISOLATION CHARACTERISTICS
Parameter
Isolation test voltage
Resistance
Conditions
Flash tested for 1 second
Viso= 500VDC
MIN.
1000
0.1
TYP.
MAX.
Units
VDC
GΩ
GENERAL CHARACTERISTICS
Parameter
Switching frequency
Conditions
All input types
MIN.
TYP.
90
MAX.
Units
kHz
TEMPERATURE CHARACTERISTICS
Parameter
Specification
Case temperature above ambient
Storage
Cooling
Conditions
All output types
MIN.
0
TYP.
38
MAX.
70
Units
°C
-55
Free air convection
150
TEMPERATURE DERATING GRAPH
1.5
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 the SIP package type is Tin Plate, Hot Dipped
over Matte Tin over Nickel Preplate. The DIP
types are Matte Tin over Nickel Preplate. Both
types in this series are backward compatible
with Sn/Pb soldering systems.
For further information, please visit www.cd4power.com/rohs
Output Power (W)
1.0
70°C
0.5 Safe Operating Area
125ºC
0
0
50
100
Ambient Temperature (ºC)
150
OUTPUT VOLTAGE ADJUSTMENT (for 5V output variants)
The trimming (adjust) input on the device allows output voltage adjustment from 1.2V to 3.3VDC by using a resistor as shown here. The table below provides R
TRIM
values for the
most commonly required output voltages. For applications not requiring the TRIM function, this pin must be left unconnected for normal regulated output.
+V
IN
V
OUT
V
OUT SET
(V)
1.2
1.5
2.0
2.1
2.2
2.5
3.3
R
TRIM
(
Ω
)
0
64
224
263
304
448
1071
NMF
TRIM
R
TRIM
-V
OUT
1. See derating graph.
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KDC_NMFC.4
Page 2 of 4
NMF SERIES
Isolated 1W Regulated Single Output DC/DC Converters
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.
C&D Technologies NMF 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 NMF 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 NMF series has toroidal isolation transformers, 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.
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
PIN CONNECTIONS - 14 PIN DIP
DIP package
SIP package
Pin
1
9
10
11
14
Function
-V
IN
+V
OUT
TRIM
-V
OUT
+V
IN
PIN CONNECTIONS - 7 PIN SIP
Pin
1
2
4
5
6
Function
+V
IN
-V
IN
-V
OUT
TRIM
+V
OUT
* 0.303 (7.70) for 48V variants
** 0.295 (7.50) for 48V variants
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.
Weight: 2.4g (DIP) 2.1g (SIP) except
for NMF24XX and NMF48XX DIP &
SIP : 2.9g
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KDC_NMFC.4
Page 3 of 4
NMF SERIES
Isolated 1W Regulated Single Output DC/DC Converters
PACKAGE SPECIFICATIONS (continued)
RECOMMENDED FOOTPRINT DETAILS
14 Pin DIP Package
7 Pin SIP Package
All dimensions in inches ±0.01 (mm ±0.25mm).
TUBE OUTLINE DIMENSIONS
14 Pin DIP Tube
7 Pin SIP Tube
All dimensions in inches ±0.01 (mm ±0.25mm).
Tube length (14 Pin DIP) : 20.47 (520mm ±2mm).
Tube length (7 Pin SIP) : 20.47 (520mm ±2mm).
Tube Quantity : 25
C&D Technologies (NCL) Limited reserve the right to alter or improve the specification, internal design or manufacturing
process at any time, without notice. Please check with your supplier or visit our website to ensure that you have the current
and complete specification for your product before use.
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