®
IMX7, IMS7 Series Data Sheet
7-Watt DC-DC Converters
Features
•
RoHS lead-free-solder and lead-solder-exempted
products are available.
•
Input voltage ranges up to 150 VDC
•
1 or 2 isolated outputs up to 48 V
•
1200 to 2000 VAC I/O electric strength test
•
Extremely wide input voltage ranges
•
Immunity according to IEC/EN 61000-4-2, -3, -4, -5, -6
25.4
1.0"
10.5
0.42"
50.8
2.0"
•
High efficiency (typ. 84%)
• Input undervoltage lockout
• Inhibit input, adjustable output voltages
• Flex power: flexible load distribution on outputs
•
Outputs no-load, overload, and short-circuit proof
•
High reliability and no derating
•
Operating ambient temperature – 40 to +85 °C
•
Thermal protection
• Supplementary insulation
•
Planar technology for best mechanical stability
•
2” × 1” case with 10.5 mm profile
Safety-approved to IEC 60950-1 and UL/CSA 60950-1
2
nd
Edition.
1
Description
The IMX7/IMS7 Series of board-mountable 7 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 telecom, where
variable input voltages or high transient voltages are
prevailent.
Covering a total input voltage range from 8.4 V to 150 V with six
different models, the converters are available with single and
electrically-isolated double outputs from 3.3 up to 48 V with
flexible load distribution on double outputs. A shutdown input
allows remote on/off.
Features include efficient input and output filtering with good
transient and surge protection, low output ripple and noise,
consistently high efficiency over the entire input voltage range,
and high reliability as well as excellent dynamic response to
load and line changes.
The converters provide supplementary insulation with SELV
outputs as for instances required in battery-supported
1
70/110IMX7 models
systems, where the bus voltage may exceed the SELV limit of
60 V. The models 70IMX7 and 110IMX7 are CE-marked.
The circuitry is comprised of integral planar magnetics. All
components are automatically assembled and securely
soldered onto a single PCB without any wire connections.
Magnetic feedback ensures maximum reliability and
repeatability in the control loop over all operating conditions.
Careful considerations of possible thermal stresses ensure
the absence of hot spots, providing long life in environments,
where temperature cycles are a reality. The thermal design
allows operation at full load up to an ambient temperature of
85 °C in free air without using any potting material. For
extremely high vibration environments the case has holes for
screw mounting.
Several options, such as open-frame, provide a high level of
application-specific engineering and design-in flexibility.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ................................. 11
Immunity to Environmental Conditions ............................... 12
Mechanical Data .................................................................. 13
Safety and Installation Instructions ..................................... 13
Description of Options ........................................................ 14
Description ............................................................................ 1
Model Selection ..................................................................... 2
Functional Description .......................................................... 3
Electrical Input Data .............................................................. 4
Electrical Output Data ............................................................ 7
Auxiliary Functions ................................................................. 9
BCD20007-G Rev AE, 14-May-2012
Page 1 of 14
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®
IMX7, IMS7 Series Data Sheet
7-Watt DC-DC Converters
Model Selection
Table 1: Model Selection
Output 1
V
o1 nom
I
o1 nom
[ V]
[A]
3.3
3.3
3.3
3.3
3.3
3.3
5.1
5.1
5.1
5.1
5.1
5.1
5
5
5
5
5
5
12
12
12
12
12
12
15
15
15
15
15
15
24
24
24
24
24
24
1
2
3
Output 2
1
V
o2 nom
I
o2 nom
[ V]
[A]
1
-
-
-
-
-
-
-
-
-
-
-
-
5
5
5
5
5
5
12
12
12
12
12
12
15
15
15
15
15
15
24
24
24
24
24
24
-
-
-
-
-
-
-
-
-
-
-
-
0.6
0.7
0.7
0.7
0.7
0.7
0.25
0.3
0.3
0.3
0.3
0.3
0.2
0.24
0.24
0.24
0.24
0.24
0.13
0.15
0.15
0.15
0.15
0.15
Output power
P
o nom
[W]
5
5
5
5
5
5
6.1
6.1
6.1
6.1
6.1
6.1
6
7
7
7
7
7
6
7.2
7.2
7.2
7.2
7.2
6
7.2
7.2
7.2
7.2
7.2
6.2
7.2
7.2
7.2
7.2
7.2
Input voltage
range
[ V]
8.4 – 36
14 – 36
16.8
2
– 75
36 – 75
40 – 121
60 – 150
2
8.4 – 36
14 – 36
16.8
2
– 75
36 – 75
40 – 121
60 – 150
3
8.4 – 36
14 – 36
16.8
2
– 75
36 – 75
40 – 121
60 – 150
3
8.4 – 36
14 – 36
16.8
2
– 75
36 – 75
40 – 121
60 – 150
3
8.4 – 36
14 – 36
16.8
2
– 75
36 – 75
40 – 121
60 – 150
3
8.4 – 36
14 – 36
16.8
2
– 75
36 – 75
40 – 121
60 – 150
3
Efficiency
η
min
η
typ
[%]
[%]
74
75.5
74.7
77
76
74.5
75.5
77
79
78
75.5
76
77
79
79.5
81.5
81
78
80.5
81.5
82.5
82
83
80
81
81.5
81
82
81.5
79
79
82
82
82
80
81
78
79
79
79
78
78
78
80
81
81
78
79
81
82
82
83
82
80
83
85
84
84
85
83
83
84
84
84
83
82
83
84
84
84
83
84
Model
Options
1.5
1.5
1.5
1.5
1.5
1.5
1.2
1.2
1.2
1.2
1.2
1.2
0.6
0.7
0.7
0.7
0.7
0.7
0.25
0.3
0.3
0.3
0.3
0.3
0.2
0.24
0.24
0.24
0.24
0.24
0.13
0.15
0.15
0.15
0.15
0.15
20IMX7-03-8
24IMS7-03-9
40IMX7-03-8
48IMS7-03-9
70IMX7-03-8
110IMX7-03-8
20IMX7-05-8
24IMS7-05-9
40IMX7-05-8
48IMS7-05-9
70IMX7-05-8
110IMX7-05-8
20IMX7-05-05-8
24IMS7-05-05-9
40IMX7-05-05-8
48IMS7-05-05-9
70IMX7-05-05-8
110IMX7-05-05-8
20IMX7-12-12-8
24IMS7-12-12-9
40IMX7-12-12-8
48IMS7-12-12-9
70IMX7-12-12-8
110IMX7-12-12-8
20IMX7-15-15-8
24IMS7-15-15-9
40IMX7-15-15-8
48IMS7-15-15-9
70IMX7-15-15-8
110IMX7-15-15-8
20IMX7-24-24-8
24IMS7-24-24-9
40IMX7-24-24-8
48IMS7-24-24-9
70IMX7-24-24-8
110IMX7-24-24-8
Z, G
Z, G
Z, G
Z, G
Z, G
Z, G
M,
Z, G
Z, G
M,
Z, G
Z, G
M,
Z, G
M,
Z, G
M,
Z, G
Z, G
M,
Z, G
Z, G
M, Z, G
M,
Z, G
M,
Z, G
Z, G
M,
Z, G
Z, G
M,
Z, G
M,
Z, G
M,
Z, G
Z, G
M,
Z, G
Z, G
M,
Z, G
M,
Z, G
M,
Z, G
Z, G
M,
Z, G
Z, G
M,
Z, G
M,
Z, G
Flexible load distribution on double-outputs possible. If only one output is used, connect both outputs of double-output models in parallel.
Operation at low input voltage possible, if
P
o
is reduced to approx. 80% of
P
o
nom at
V
i min
= 14.1 V.
Up to 154 V for 2 s
NFND: Not for new designs.
Preferred for new designs
Note:
Use 20IMX7 to replace 24IMS7 and 40IMX7 to replace 48IMS7.
BCD20007-G Rev AE, 14-May-2012
Page 2 of 14
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®
IMX7, IMS7 Series Data Sheet
7-Watt DC-DC Converters
Part Number Description
Input voltage range
V
i
8.4 – 36 V .............................................. 20
14 – 36 V ............................................... 24
16.8 – 75 V ............................................ 40
36 – 75 V ............................................... 48
40 – 121 V ............................................. 70
60 – 150 V ........................................... 110
Series .............................................................. IMX7, IMS7
Output voltage of output 1 ...................... 03, 05, 12, 15, 24
Output voltage of output 2 ............................ 05, 12, 15, 24
Operating ambient temperature
T
A
–40 to 85 °C ............................................... -8
–40 to 71 °C ............................................... -9
Options:
Surface mount version
1 ...........................................
M
Open frame
1 .....................................................................
Z
RoHS-compliant for all six substances ...... G
40 IMX7 - 05 - 05 -8 Z G
Obsolete option: C-pinout .............................................. C
1
Option M and Z exclude each other.
Note:
The sequence of options must follow the order above.
Example:
40IMX7-05-05-8ZG: DC-DC converter, input voltage range 16.8 – 75 V, 2 outputs providing each 5 V, 700 mA,
temperature range – 40 to 85 °C, open frame, RoHS compliant for all six substances.
03042b
Functional Description
The IMX7/IMS7 Series DC-DC converters are feedback-
controlled flyback converters using current mode PWM (Pulse
Width Modulation).
In the case of single-output models, the output is directly
sensed and fed back to the primary control circuit via a pulse
transformer, resulting in tight regulation of the output voltage.
The R input is referenced to the secondary side and allows for
programming the output voltages in the range 75 to 105% of
V
o nom
, using either an external resistor or an external voltage
source.
For double-output models, the output voltage is sensed by a
separate transformer winding close to the secondary and fed
03025a
Vi+
1
11
Vo1+
Trim
4
PWM
i
3
10
Vo1–
13
Vo2+
Vi –
2
2
×
2200 pF
12
Vo2–
14
n.c.
Fig. 2
Block diagram of dual-output models
11
Vo+
Vi+
1
PWM
i
3
10
Vo–
2
×
2200 pF
1500
V
12
Vi–
2
13
R
back to the primary control circuit. Close magnetic coupling is
provided by the planar construction, ensuring very good
regulation, and allowing for flexible load distribution. The Trim
input of double-output models is referenced to the primary
side, and allows for programming the output voltages in the
range of 100 to 105%
of V
o nom
by means of an external
resistor, or within 75 to 100% of
V
o nom
, using an external
voltage source.
Current limitation is provided by the primary circuit, thus
limiting the total output current (I
o nom
for the single- and the
sum
I
o1 nom
+
I
o2 nom
for double-output models).
The inhibit input i allows remote control of the outputs; pin i
must be connected to Vi– to activate the converter.
n.c.
4
14
n.c.
Fig. 1
Block diagram of single-output models
BCD20007-G Rev AE, 14-May-2012
Page 3 of 14
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®
IMX7, IMS7 Series Data Sheet
7-Watt DC-DC Converters
Electrical Input Data
General conditions:
– T
A
= 25 °C, unless
T
C
is specified.
– Connector pin i connected with Vi–.
– Trim or R input not connected.
Table 2a: Input data of IMX7
Input
Characteristics
V
i
V
i nom
V
i sur
t
start up
Input voltage range
1
Nominal input voltage
Repetitive surge voltage
Converter
2
start-up time
Rise time
2
No load input current
Input capacitance
Inhibit voltage
switch on
inh. release
Conditions
T
C min
–
T
C max
I
o
= 0 –
I
o nom
abs. max input (3 s)
Worst case condition at
V
i min
and full load
V
i nom
I
o nom
resistive load
capacitive load
0.25
5
12
15
4.7
–10
2.4
+0.8
V
i max
or open
–0.5
1
3
3.8
approx. 400
50
A
A
3.7
approx. 400
30
A
–10
2.4
30
8.4
20
50
5
0.5
0.1
5
12
8
0.5
+0.8
V
i max
or open
–0.5
1
3
4.2
approx. 400
20
A
–10
2.4
15
20IMX7
min typ max min
36
16.8
6
40
100
0.25 0.5
0.1
5
12
8
0.2
+0.8 –10
15
40IMX7
typ max min
75
40
70
150
0.25 0.5
0.1
5
12
8
0.2
+0.8
15
mA
µF
V
0.25 0.5
0.1
ms
s
70IMX7
121 60
110
110IMX7
150
V
typ max min typ max Unit
t
rise
I
i o
C
i
V
inh
I
o
= 0,
V
i min
–
V
i max
(for surge calculation)
converter operating
converter inhibited
V
i max
2.4
V
i max
or open
or open
– 0.5
1
3
5.6
approx. 300
10
– 0.5
1
3
A
kHz
mA
pp
mA
I
inh
I
i inh
I
inr p
f
s
I
i rr
V
i RFI
1
2
3
4
5
6
Inhibit current
Input current when the
converter is inhibited
Inrush peak current
Switching frequency
Reflected ripple current
Input RFI level conducted
converter operating
converter inhibited
V
i min
–
V
i max
V
i
=
V
i nom 4
V
i min
–
V
i max
,
I
o
= 0 –
I
o nom
I
o
= 0 –
I
o nom
EN 55022
3
V
i min
will not be as stated, if
V
o
is increased above
V
o nom
by use of the R or Trim input. If the output voltage is set to a higher value,
V
i min
will be proportionally increased.
Measured with a resistive and the max. admissible capacitive load.
Measured with a lead length of 0.1 m, leads twisted. Double-output models with both outputs in parallel. 70/110 IMX7 models need an
external capacitor at the input, e.g., 1
µF
film or ceramic.
Source impedance according to ETS 300132-2, version 4.3, at
V
i nom
.
The DC-DC converter shuts down automatically at approx. 38 V.
Operation at lower input voltage possible:
P
o
approx. 80% of
P
o nom
at
V
i min
= 14.4 V.
V
o
V
o nom
t
rise
04008a
t
start up
t
Fig. 3
Converter start-up and rise time
BCD20007-G Rev AE, 14-May-2012
Page 4 of 14
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®
IMX7, IMS7 Series Data Sheet
7-Watt DC-DC Converters
Table 2b: Input data of IMS7; general conditions as in table 2a
Input
Characteristics
V
i
V
i nom
V
i sur
t
start up
Input voltage range
1
Nominal input voltage
Repetitive surge voltage
Converter
2
start-up time
Rise time
2
No load input current
Input capacitance
Inhibit voltage
switch on
inh. release
Conditions
T
C min
–
T
C max
I
o
= 0 –
I
o nom
abs. max input (3 s)
Worst case condition at
V
i min
and full load
V
i nom
I
o nom
resistive load
capacitive load
0.25
5
12
12
0.8
–10
2.4
or open
I
inh
I
i inh
I
inr p
f
s
I
i rr
V
i RFI
1
2
3
4
24IMS7
min
14
24
50
0.5
0.1
typ
max
36
min
36
48IMS7
typ
48
100
0.25
5
12
24
6
0.5
+0.8
V
i max
–10
2.4
or open
–0.5
1
3
3
3.9
approx. 330
40
30
A
A
kHz
mA
pp
+0.8
V
i max
mA
12
mA
µF
V
0.5
0.1
ms
s
max
75
Unit
V
t
rise
I
i o
C
i
V
inh
I
o
= 0,
V
i min
–
V
i max
(for surge calculation)
converter operating
converter inhibited
Inhibit current
Input current when the
converter is inhibited
Inrush peak current
Switching frequency
Reflected ripple current
Input RFI level conducted
converter operating
converter inhibited
V
i min
–
V
i max
V
i
=
V
i nom 4
V
i min
–
V
i max
,
I
o
= 0 –
I
o nom
I
o
= 0 –
I
o nom
EN 55022
3
–0.5
1
4.0
approx. 330
A
V
i min
will not be as stated, if
V
o
is increased above
V
o nom
by use of the R or Trim input. If the output voltage is set to a higher value,
V
i min
will be proportionally increased.
Measured with a resistive and the max. admissible capacitive load.
Measured with a lead length of 0.1 m, leads twisted. Double-output models with both outputs in parallel. 70 /110 IMX7 models need an
external capacitor at the input, e.g. 1
µF
film or ceramic.
Source impedance according to ETS 300132-2, version 4.3, at
V
i nom
BCD20007-G Rev AE, 14-May-2012
Page 5 of 14
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