IMX15, IMY15, IMS15 Series Data Sheet
15 Watt DC-DC Converters
Features
• RoHS lead-free-solder and lead-solder-exempted
products are available.
• Wide input voltage ranges up to 150 VDC
• 1 or 2 isolated outputs up to 48 V
• 1500 to 3000 VAC I/O voltage withstand test
• Emissions EN 55022 level A
• Immunity to IEC/EN 61000-4-2,-3,-4,-5, and -6
40.6
1.6"
10.5
0.42"
51
2.0"
• High efficiency (typ. 86%)
• Input undervoltage lockout
• Shutdown input, adjustable output voltages
• Flex power: Flexible load distribution on outputs
• Outputs no-load, overload, and short-circuit proof
• Operating ambient temperature –40 to 85 °C
• Thermal protection
• 2" x 1.6" case with 10.5 mm profile
• Supplementary insulation: 20/40IMX15 models
• Double or reinforced insulation: 110IMY15 models
Safety-approved to IEC 60950-1 and UL/CSA 60950 -1
2
nd
Edition
1
Description
The IMX15, IMS15, and IMY15 Series of board mountable
15 Watt DC-DC converters have been designed according to
the latest industry requirements and standards. The
converters are particularly suitable for use in mobile or
stationary applications in transport, railways, industry, or
telecommunication, where variable input voltages or high
transient voltages are prevalent.
Covering a total input voltage range from 8.4 up to 150 V with
different models, the converters are available with single and
electrically-isolated double outputs from 3.3 up to 48 V,
externally adjustable, with flexible load distribution on double-
output models. A shutdown input allows for remote on/off.
Features include efficient input and output filtering and
consistently high efficiency over the entire input voltage range,
high reliability, and excellent dynamic response to load and
line changes.
The converters have been approved by CSA. 20IMS/20IMX15
and 40IMS/40IMX15 models provide supplementary in-
sulation. Connected to a secondary circuit, these models
1
110IMY15
models
provide SELV outputs, even if the bus voltage at the converter
input exceeds the SELV-limit of 60 VDC. The 110IMY15
models provide double insulation and are CE marked. They
may be connected to a rectified 110 VAC source without any
further isolation barrier.
The circuitry is comprised of integrated planar magnetics. All
components are automatically assembled and solidly soldered
onto a single PCB without any wire connection. Magnetic
feedback ensures maximum reliability and repeatability in the
control loop over all operating conditions. Careful con-
sideration of possible thermal stress ensures the absence of
hot spots providing long life in environments, where
temperature cycles are frequent. The thermal design allows
operation at full load up to an ambient temperature of 71 °C in
free air without using any potting material. For extremely high
vibration environments the case has holes for screw mounting.
Page
Description ............................................................................ 1
Model Selection ..................................................................... 2
Functional Description .......................................................... 4
Electrical Input Data .............................................................. 5
Electrical Output Data ............................................................ 8
Auxiliary Functions ............................................................... 13
Table of Contents
Page
Electromagnetic Compatibility (EMC) ................................. 14
Immunity to Environmental Conditions ............................... 16
Mechanical Data .................................................................. 17
Safety and Installation Instructions ..................................... 18
Description of Options ........................................................ 19
Accessories ......................................................................... 19
Copyright © 2015, Bel Power Solutions Inc. All rights reserved.
MELCHER
BCD20008-G Rev AD, 10-Aug-2015
The Power Partners.
Page 1 of 19
IMX15, IMY15, IMS15 Series Data Sheet
15 Watt DC-DC Converters
Model Selection
Table 1: Model Selection
Output 1
V
o nom
I
o nom 1
[VDC]
[A]
3.3
3.3
3.3
3.3
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5
5
5
5
5
12
12
12
12
12
15
15
15
15
15
24
24
24
24
24
1
Output 2
V
o nom
I
o nom 1
[VDC]
[A]
-
-
-
-
-
-
-
-
-
-
-
-
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
12
12
12
12
12
15
15
15
15
15
24
24
24
24
24
-
-
-
-
-
-
-
-
-
-
-
-
1.35
1.6
1.5
1.6
1.5
1.3
1.4
1.4
1.4
1.4
0.65
0.7
0.7
0.7
0.7
0.5
0.56
0.56
0.56
0.56
0.32
0.35
0.35
0.35
0.35
Output
power
P
o nom
[W]
14.9
13.2
14.9
14.9
17.5
17.5
17.5
11.7
13.8
12.8
13.8
12.8
11.3
13.5
12.6
13.5
12.6
13.0
14.0
14.0
14.0
14.0
15.6
16.8
16.8
16.8
16.8
15.0
16.8
16.8
16.8
16.8
15.4
16.8
16.8
16.8
16.8
Input voltage
V
i min
to
V
i max
[VDC]
8.4 to 36
5
16.8 to 75
3
16.8 to 75
3
50 to 150
4
8.4 to 36
5
16.8 to 75
3
50 to 150
4
8.4 to 36
5
14 to 36
16.8 to 75
3
36 to 75
50 to 150
4
8.4 to 36
5
14 to 36
16.8 to 75
3
36 to 75
50 to 150
4
8.4 to 36
5
14 to 36
16.8 to 75
3
36 to 75
50 to 150
4
8.4 to 36
5
14 to 36
16.8 to 75
3
36 to 75
50 to 150
4
8.4 to 36
5
14 to 36
16.8 to 75
3
36 to 75
50 to 150
4
8.4 to 36
5
14 to 36
16.8 to 75
3
36 to 75
50 to 150
4
Efficiency
η
min 6
η
typ 6
[%]
[%]
80
78
81
78
83
85
79.5
82
81.5
81.5
82
78
82
81
82
79
79
82
81
81
81
80
83
83
84
82
82
85
83
83
84
82
83
84
84
83
82
82
80
83
79
86
87
82
84
84
83
83
81
84
83
84
82
82
85
84
84
83
82
86
86
87
86
85
88
86
86
86
85
86
87
86
86
85
Model
Options
2
4.5
4.0
4.5
4.5
3.5
3.5
3.5
2.3
2.7
2.5
2.7
2.5
1.35
1.6
1.5
1.6
1.5
1.3
1.4
1.4
1.4
1.4
0.65
0.7
0.7
0.7
0.7
0.5
0.56
0.56
0.56
0.56
0.32
0.35
0.35
0.35
0.35
20IMX15-03-8RG
SR
40IMX15-03-8R
40IMX15-03-8RG
SR
110IMY15-03-8RG
SR
20IMX15-05-8RG
SR
40IMX15-05-8RG
SR
110IMY15-05-8RG
SR
20IMX15-05-8R
24IMS15-05-9R
40IMX15-05-8R
48IMS15-05-9R
110IMY15-05-8R
20IMX15-0503-8R
24IMS15-0503-9R
40IMX15-0503-8R
48IMS15-0503-9R
110IMY15-0503-8R
20IMX15-05-05-8
24IMS15-05-05-9
40IMX15-05-05-8
48IMS15-05-05-9
110IMY15-05-05-8
20IMX15-12-12-8
24IMS15-12-12-9
40IMX15-12-12-8
48IMS15-12-12-9
110IMY15-12-12-8
20IMX15-15-15-8
24IMS15-15-15-9
40IMX15-15-15-8
48IMS15-15-15-9
110IMY15-15-15-8
20IMX15-24-24-8
24IMS15-24-24-9
40IMX15-24-24-8
48IMS15-24-24-9
110IMY15-24-24-8
-9,
i, Z, -G
i, Z
-9,
i, Z, -G
i, Z, -G
i, Z, -G
i, Z, -G
i, Z, -G
-9, i, Z
i, Z
-9, i, Z
i, Z
i, Z
-9,
i, Z, G
i, Z
-9,
i, Z, G
i, Z
i, Z, G
-9,
i,
R,
Z, G
i, Z
-9,
i,
R,
Z, G
i, Z
i, Z, G
-9,
i, Z, G
i, Z
-9,
i,
R,
Z, G
i, Z
i, Z, G
-9,
i,
R,
Z, G
i, Z
-9,
i,
R,
Z, G
i, Z
i, Z, G
-9,
i,
R,
Z, G
i, Z
-9,
i,
R,
Z, G
i, Z
i, Z, G
2
3
4
5
6
SR
Flexible load distribution on dual and double outputs possible; up to 75% of the total output power
P
o nom
on one of the 2 outputs.
IMX/IMY15-0503 models have reduced load distribution flexibility; 1.8 A max. on one of the 2 outputs. The other output should not
exceed the difference to the total output power
P
o nom
.
See
Description of Options.
Short-time operation down to
V
i
= 14.4 V possible (P
o
reduced to approx. 85% of
P
o nom
)
Short-time operation down to
V
i
= 43.2 V possible (P
o
reduced to approx. 85% of
P
o nom
) and up to 154 V
Initial start-up at 9 V, main output voltage regulation down to 8.4 V
Efficiency at
T
A
= 25 °C,
V
i nom,
I
o nom
.
Models with synchronos rectifier. For the RoHS version of such models, add -G !
Preferred for new designs
NFND Not for new designs.
Replace 24IMS15 models by 20IMX15 and 48IMS15 by 40IMX15;
Replace 20IMX15-05, 40IMX15-05, and 110IMY15-05 by models with synchronos rectifier
SR
;
For new designs, chose always the RoHS version !
MELCHER
BCD20008-G Rev AD, 10-Aug-2015
The Power Partners.
Page 2 of 19
IMX15, IMY15, IMS15 Series Data Sheet
15 Watt DC-DC Converters
RoHS- Compliant Models
The type designation of RoHS-compliant models (compliant for the restriction of all six substances) for the IMX/IMY15 Series
ends with "G".
However, in
single-output models
with 3.3 V or 5.1 V output an extra hyphen (-) is added after the existing "G", which already
signifies a synchronos rectifier
SR
. This is an exception to our normal nomenclature to identify this type of product, since G is
already used to designate products for higher output current fitted with a synchronous rectifier. Some examples
– 20IMX15-05-8R-G means a standard version with RoHS compliance for all six substances.
– 20IMX15-05-8RG means a synchronos rectifier
SR
version which is not RoHS-compliant.
– 20IMX15-05-8RG-G means a synchronos rectifier
SR
version and with RoHS compliance for all six substances.
– 20IMX15-05-05-8RG means a double-output model with RoHS compliance for all six substances
– 110IMY15-24-24-8RG means a double-output model with RoHS compliance for all six substances.
Part Number Description
40 IMX15 - 05 - 05 - 8 R G i Z -G
xxix
Input voltage range
V
i
8.4 to 36 V ...................................................... 20
14 to 36 V ....................................................... 24
16.8 to 75 V .................................................... 40
36 to 75 V ....................................................... 48
50 to 150 V ................................................... 110
Series
IMX15, IMS15, IMY15
Output voltage of output 1 ............................ 03, 05, 12, 15, 24
Hyphen designating double-output models with two
electrically isolated outputs .............................. -
Output voltage of output 2 ............................ 03, 05, 12, 15, 24
Operating ambient temperature range
T
A
– 40
6
to 85 °C ................................................. -8
– 40 to 71 °C ................................................... -9
Options and features:
R input and magnetic feedback ...................... R
Synchronous rectification ............................... G
Inhibit ................................................................. i
Open frame ...................................................... Z
RoHS-compliant for all 6 substances ..... G or -G
1
2
3
4
5
6
1
6
2
3
4
5
Not applicable to -0503 models. They have a common ground.
IMS15 models are not recommended for new designs.
Standard for single-output and -0503- models, options for other models (but not for new designs)
Option i replaces the standard shutdown function; see
Description of Options.
RoHS models with synchronos rectifier end as an exception with -G.
Only –25 °C for older -8RG
SR
models (Rev. < BA); see table 7a.
Note:
The sequence of options must follow the order above !
Examples: 20 IM X15-05-05-8: DC-DC converter, input voltage 9 to 36 V, 2 galvanically isolated outputs each providing
5 V, 1.3 A.
110 IMY15-0503-8R: DC-DC converter, input voltage 50 to 150 V, 2 outputs with common return providing +5.1 V,
1.5 A and +3.3 V, 1.5 A. Converter fitted with magnetic feedback for tight output voltage regulation.
Product Marking
The converters without option Z are marked with basic type designation, input and output voltages and currents, applicable
safety approval and recognition marks, patent nos., company logo, date code, and serial number.
MELCHER
BCD20008-G Rev AD, 10-Aug-2015
The Power Partners.
Page 3 of 19
IMX15, IMY15, IMS15 Series Data Sheet
15 Watt DC-DC Converters
Functional Description
The IMX15/IMS15/IMY15 Series of DC-DC converters are
magnetic feedback-controlled flyback converters using
current mode PWM (Pulse Width Modulation). The -05- and
-0503-output voltage models, as well as all double-output
models fitted with option R, exhibit an active magnetic
feedback loop via a pulse transformer, resulting in very tight
regulation of the output voltage (see the block diagrams). The
output voltages of these models can be adjusted via the
R-input. The R-input is referenced to the secondary side and
allows for programming the output voltages in the range of
approximately 80 to 105% of
V
o nom
, using either an external
resistor or an external voltage source.
Several single-output models with 3.3 or 5.1 V output exhibit a
synchronos rectifier to improve the efficiency.
The voltage regulation on the double-output models without
option R is achieved with a passive transformer feedback
from the main transformer (see fig. 3). The output voltages can
be adjusted via the Trim input. The Trim input is referenced to
the primary side and allows for programming the output
voltage in the range 100 to 105% of
V
o nom
via an external
resistor or within 75 to 105% using an external voltage source.
The load regulation output characteristic allows for paralleling
of one or more double-output models with equal output
voltage.
Current limitation is provided by the primary circuit, thus
limiting the total output power of double-output models. The
shutdown input allows remote converter on/off.
Overtemperature protection will disable the converter under
excessive overload conditions with automatic restart.
Vi+
1
03089a
13
Vo1+
SD
4
PWM
n.c.
3
15
Go
11
Vo2+
Vi –
2
2 x 2200 pF
12
Go
17
R
Fig. 2
Block diagram of -0503-models
03090a
Vi+
1
11
Vo1+
SD
4
PWM
Trim
3
12
Vo1–
13
Vo2+
Vi –
2
03039
15
Vo2–
Vi+
1
13
Vo+
2 x 2200 pF
17
n.c.
PWM
SD
4
15
Vo–
Fig. 3
Block diagram of double-output models
2 x 2200 pF
1500 V
Vi–
2
17
R
Fig. 1
Block diagram of single-output models
MELCHER
BCD20008-G Rev AD, 10-Aug-2015
The Power Partners.
Page 4 of 19
IMX15, IMY15, IMS15 Series Data Sheet
15 Watt DC-DC Converters
Electrical Input Data
General conditions:
– T
A
= 25 °C, unless
T
C
is specified.
– Shut-down pin left open-circuit.
– Trim or R input left open-circuit.
Table 2a: Input data of IMX15 and IMY15 models
Input
Characteristics
V
i
V
i nom
V
i sur
t
startup
Input voltage range
1
Nominal input voltage
Repetitive surge voltage
Converter
Switch on
2
start-up time
SD high
Rise time
2
Conditions
T
A min
–
T
A max
I
o
= 0 –
I
o nom
Abs. max input (3 s)
Worst case condition at
V
i min
,
I
o
=
I
o nom
V
i nom
, resistive load
I
o nom
, capac. load
I
i o
I
irr
I
inr p
C
i
––
V
S D
20IMX
min
9
5, 7
20
40
0.25
0.5
0.1
5
10
20
65
30
8
1.5
–10 to 0.7
open or 2 – 20
approx. 10
V
i min
–
V
i max
SD connected to Vi–
V
i min
–
V
i max
,
I
o
= 0 –
I
o nom
EN 55022
4
10
approx. 300
A
typ
max min
40IMX
typ
max min
75
40
100
0.25
0.5
0.1
5
10
20
45
30
9
0.75
–10 to 0.7
open or 2 – 20
approx. 10
3
approx. 300
A
50
5
110IMY
typ
max
150
8
110
168
0.5
0.8
0.1
5
10
20
15
20
10
0.35
–10 to 0.7
open or 2 – 20
approx. 10
1
approx. 300
A
Unit
36 16.8
5, 6
V
s
t
rise
ms
No-load input current
Reflected ripple current
Inrush peak current
3
Input capacitance
Shut-down voltage
I
o
= 0,
V
i min
–
V
i max
I
o
= 0 –
I
o nom
V
i
=
V
i nom
for surge calculation
Converter disabled
Converter operating
mA
mA
pp
A
µF
V
––
R
SD
––
I
SD
Shut-down input resistance
Input current, when
disabled
Switching frequency
Input RFI level conducted
kΩ
mA
kHz
f
s
V
i RFI
1
2
3
4
5
6
7
8
If
V
o
is set above
V
o nom
by use of the R or Trim input,
V
i min
will be proportionately increased.
Measured with resistive and max. admissible capacitive load. Valid for models with rev. AI or greater.
Source impedance according to ETS 300132-2, version 4.3.
Measured with a ceramic capacitor
C
i
directly across input; output lead length 0.1 m, leads twisted. Double-output models with both
outputs in parallel.
C
i
is specified in table 11.
Input undervoltage lockout at typ. 80% of
V
i min
.
Short time operation down to
V
i min
>14.4 V possible.
P
o
reduced to approx. 85% of
P
o nom
.
Initial start-up at
V
i
= 9 V, main output voltage regulation down to 8.4 V
Short time operation up to 154 V possible for 2 s.
MELCHER
BCD20008-G Rev AD, 10-Aug-2015
The Power Partners.
Page 5 of 19
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