Board Mountable
DC-DC Converters
IMX 7 Series
7 Watt DC-DC Converters
Wide input voltage ranges up to 150 V DC
1 or 2 outputs up to 48 V DC
1500...2500 V DC I/O electric strength test
• Extremely wide input voltage ranges
• Electrical isolation, also between outputs
• Emissions below EN 55 022 level B.
• Immunity to IEC/EN 61000-4-2, -3, -4, -5 and -6
• High efficiency (typ. 84%)
• Inhibit input, output voltage adjustable
• Flex power: flexible load distribution on outputs
• Outputs no-load, overload and short-circuit proof
• Operating ambient temperature up to –40...85°C
• High reliability and no derating
• 2"
×
1" case with 10.5 mm profile
• Supplementary insulation
Safety according to IEC/EN 60950, UL 1950
LGA
1
IMX 7 Series
25.4
1.0"
10.5
0.42"
50.8
2.0"
1
For 70/110 IMX types
Summary
The IMX 7 series of board mountable 7 Watt DC-DC con-
verters has been designed according to the latest industry
requirements and standards. The converters are particularly
suitable for use in mobile or stationary applications in trans-
port, railways, industry or telecommunications where vari-
able input voltages or high transient voltages are prevalent.
Covering a total input voltage range from 8.4 V DC up to
150 V DC with four different types the units are available
with single and electrically isolated double outputs allowing
the configuration of output voltages from 3.3 V DC up to
48 V DC externally adjustable, with flexible load distribution
on double output units. An inhibit input allows remote con-
verter on/off.
Features include efficient input and output filtering with un-
surpassed transient and surge protection, low output ripple
and noise, consistently high efficiency over the entire input
voltage range, high reliability as well as excellent dynamic
response to load and line changes.
The converters provide supplementary insulation with
SELV outputs as e.g. required in battery supported sys-
tems where the bus voltage may exceed the SELV limit of
60 V DC. They are designed and built according to the inter-
national safety standards IEC/EN 60950, UL 1950, CAN/
CSA C22.2 No.950-95 and are LGA and UL marked. The
70 IMX 7 and 110 IMX 7 types are CE marked.
The circuit comprises of integrated planar magnetics and
all components are automatically assembled and solidly
soldered onto a single PCB without any wire connections.
Magnetic feedback ensures maximum reliability and re-
peatability 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.
Various options as e.g. extended temperature range
–40...85°C, industrial C pinout or SMD pinout provide a
high level of application specific engineering and design-in
flexibility.
Table of Contents
Page
Page
Auxiliary Functions ......................................................... 10
Electromagnetic Compatibility (EMC) ............................ 12
Immunity to Environmental Conditions .......................... 13
Mechanical Data ............................................................ 14
Safety and Installation Instructions ................................ 15
Description of Options .................................................... 17
1/18
Summary .......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 3
Functional Description ..................................................... 4
Electrical Input Data ......................................................... 5
Electrical Output Data ...................................................... 7
Edition 6/5.2000
Board Mountable
Type Survey and Key Data
Table 1: Type survey
Output 1
U
o1 nom
I
o1 nom
[V DC]
[A]
1
3.3
3.3
3.3
3.3
5.1
5.1
5.1
5.1
12
12
12
12
15
15
15
15
24
24
24
24
5
5
5
5
12
12
12
12
15
15
15
15
24
24
24
24
1
2
3
DC-DC Converters
IMX 7 Series
Output 2
U
o2 nom
I
o2 nom
[V DC]
[A]
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5
5
5
5
12
12
12
12
15
15
15
15
24
24
24
24
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.6
0.7
0.7
0.7
0.25
0.3
0.3
0.3
0.2
0.24
0.24
0.24
0.13
0.15
0.15
0.15
Output Power
P
o nom
[W]
5
5
5
5
6.1
6.1
6.1
6.1
6
7.2
7.2
7.2
6
7.2
7.2
7.2
6.2
7.2
7.2
7.2
6
7
7
7
6
7.2
7.2
7.2
6
7.2
7.2
7.2
6.2
7.2
7.2
7.2
Input voltage
range
[V DC]
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
8.4...36
16.8...75
3
40...121
60...150
Efficiency
h
typ
[%]
79
81
79
79
80
81
80
80
84
84
83
84
84
84
83
84
84
84
83
84
82
83
82
82
84
84
83
84
84
84
83
84
84
84
83
84
Type
designation
20 IMX 7-03-9
40 IMX 7-03-9
70 IMX 7-03-9
110 IMX 7-03-9
20 IMX 7-05-9
40 IMX 7-05-9
70 IMX 7-05-9
110 IMX 7-05-9
20 IMX 7-12-9C2
40 IMX 7-12-9C2
70 IMX 7-12-9C2
110 IMX 7-12-9C2
20 IMX 7-15-9C2
40 IMX 7-15-9C2
70 IMX 7-15-9C2
110 IMX 7-15-9C2
20 IMX 7-24-9C2
40 IMX 7-24-9C2
70 IMX 7-24-9C2
110 IMX 7-24-9C2
20 IMX 7-05-05-9
40 IMX 7-05-05-9
70 IMX 7-05-05-9
110 IMX 7-05-05-9
20 IMX 7-12-12-9
40 IMX 7-12-12-9
70 IMX 7-12-12-9
110 IMX 7-12-12-9
20 IMX 7-15-15-9
40 IMX 7-15-15-9
70 IMX 7-15-15-9
110 IMX 7-15-15-9
20 IMX 7-24-24-9
40 IMX 7-24-24-9
70 IMX 7-24-24-9
110 IMX 7-24-24-9
Options
2
1.5
1.5
1.5
1.5
1.2
1.2
1.2
1.2
0.5
0.6
0.6
0.6
0.4
0.48
0.48
0.48
0.26
0.3
0.3
0.3
0.6
0.7
0.7
0.7
0.25
0.3
0.3
0.3
0.2
0.24
0.24
0.24
0.13
0.15
0.15
0.15
-8, D, M, C, L, Z
-8, D, M, C, L, Z
-8, D, M, L, Z
-8, D, M, L, Z
-8, D, M, C, L, Z
-8, D, M, C, L, Z
-8, D, M, L, Z
-8, D, M, L, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, Z
-8, M, C, L, Z
-8, M, C, L, Z
-8, M, L, Z
-8, M, L, Z
-8, M, C, L, Z
-8, M, C, L, Z
-8, M, L, Z
-8, M, L, Z
-8, M, C, L, Z
-8, M, C, L, Z
-8, M, L, Z
-8, M, L, Z
-8, M, C, L, Z
-8, M, C, L, Z
-8, M, L, Z
-8, M, L, Z
Flexible load distribution on double outputs possible.
See table:
Survey of options.
Operation at lower input voltage possible:
P
o
approx. 80% of
P
o nom
at
U
i min
= 14.4 V.
Edition 6/5.2000
2/18
Board Mountable
Type Key
DC-DC Converters
IMX 7 Series
20 IMX 7 - 05 - 05 -9 D M C L Z
Input voltage range
U
i
8.4...36 V DC ............................................ 20
16.8...75 V DC ............................................ 40
40...121 V DC ............................................ 70
60...150 V DC .......................................... 110
Series ........................................................................ IMX 7
Output voltage type output 1 .................. 03, 05, 12, 15, 24
Dash:
Designates double output unit with two
independent electrically isolated outputs ...... -
1
Output voltage type output 2 ........................ 05, 12, 15, 24
Operating ambient temperature range
T
A
–40...71°C .................................................. -9
–40...85°C (option) ..................................... -8
Options:
Signal Out OK ............................................. D
Surface mount version with pins ................. M
C-pinout ...................................................... C
Surface mount version with PCB lid ............ L
Open frame .................................................. Z
3
4
24
24
34
34
1
2
Not applicable for option C.
Option -8 excludes option D and vice versa.
Option M excludes option C and vice versa.
For delivery lead times contact factory. Some types require a minimum order quantity.
Examples:
40 IMX 7-05-05-9M: DC-DC converter, input voltage range 16.8...75 V, 2 electrically isolated outputs each
providing 5 V, 700 mA, surface mount version.
20 IMX 7-0505-9C: DC-DC converter, input voltage range 8.4...36 V, C pinout with outputs
±5
V, 600 mA.
20 IMX 7-12-9C2: DC-DC converter, input voltage range 8.4...36 V, C pinout with one output 12 V, 500 mA.
Edition 6/5.2000
3/18
Board Mountable
Functional Description
DC-DC Converters
IMX 7 Series
The IMX 7 DC-DC modules are feedback controlled flyback
converters using current mode PWM (Pulse Width Modula-
tion). See block diagram for single and double output types.
In the case of the single output units the output is directly
monitored 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 of the output voltages in the
range 75 to 105% of
U
o nom
using either an external resistor
or an external voltage source.
03041
In the case of the dual and double output units the output
voltage is monitored by a separate transformer winding
close to the secondary windings and fed back to the control
circuit. The R (Trim) input is referenced to the primary side
and allows programming of the output voltage in the range
100 to 105% of
U
o nom
by an external resistor or within 75 to
105% of
U
o nom
using an external voltage source.
Current limitation is provided by the primary circuit, thus
limiting the total output power.
The inhibit input allows remote converter on/off.
03042
Vi+
1
11
Vo+
Vi+
1
11
Vo1+
PWM
i
3
10
(Trim) R
4
Vo–
2
×
2200 pF
12
10
Vo1–
PWM
i
3
10 nF
13
Vo2+
V i–
2
n.c.
4
13
R
14
D
Vi –
2
2
×
2200 pF
12
Vo2–
14
n.c.
Fig. 1
Block diagram, single output types, standard pinout
Fig. 2
Block diagram, double output types, standard pinout
03063
03062
Vi+
1
3
Vo+
Vi+
1
3
Vo+
PWM
5
Vo–
10
Go
PWM
10 nF
2
×
2200 pF
Vi–
2
Vi–
2
2
×
2200 pF
5
Vo–
Fig. 3
Block diagram, single output types, C pinout
Fig. 4
Block diagram, dual output types, C pinout
Edition 6/5.2000
4/18
Board Mountable
Electrical Input Data
General conditions:
– T
A
= 25°C, unless
T
C
is specified.
– Connector pins i and Vi– interconnected.
– Trim or R input not connected.
DC-DC Converters
IMX 7 Series
Table 2: Input Data
Input
Characteristics
Conditions
20 IMX 7
40 IMX 7
70 IMX 7
110 IMX 7
Unit
V DC
min typ max min typ max min typ max min typ max
8.4
20
36 16.8
6
40
100
50
5
0.25 0.5
0.1
5
12
15
4.7
–10...0.8
open or
2.4...U
i max
–0.5
1
<3.0
3.8
3.7
approx. 400
30
B
B
30
5
12
8
0.5
–10 ...0.8
open or
2.4...U
i max
–0.5
1
<3.0
4.2
approx. 400
20
B
15
4
4
4
U
i
U
i nom
U
i sur
Input voltage range
1
Nominal input voltage
Repetitive surge
voltage
Converter
2
switch on
start-up time
inh. release
Rise time
2
T
C min
...T
C max
I
o
= 0...I
o nom
abs. max input (3 s)
150 V
Worst case condition at
U
i min
and full load
75
40
70
121
60
110
150
t
start up
t
rise
I
i o
C
i
U
inh
0.25 0.5
0.1
0.25 0.5
0.1
5
12
8
0.2
–10 ...0.8
open or
2.4...75
–0.5
1
<3.0
15
0.25 0.5
0.1
5
12
8
0.2
–10 ...0.8
open or
2.4...75
–0.5
1
<3.0
5.6
approx. 300
10
15
s
U
i nom
I
o nom
resistive load
capacitive load
ms
No load input current
Input capacitance
Inhibit voltage
I
o
= 0,
U
i min
...U
i max
for surge calculation
unit operating
unit inhibited
mA
µF
V DC
I
inh
I
i inh
I
inr p
f
s
I
i rr
u
i RFI
1
Inhibit current
unit operating
unit inhibited
mA
Input current
if unit shut down
Inrush peak current
Switching frequency
Reflected
ripple current
Input RFI level
conducted and radiated
U
i
min
...U
i max
U
i
=
U
i nom 7
I
o
= 0...I
o nom
EN 55022
3
A
kHz
mA
pp
U
i min
...U
i max
,
I
o
= 0...I
o nom
approx. 400
50
B
2
3
4
5
6
7
U
i min
will not be as stated if
U
o
is increased above
U
o nom
by use of the R input. If the output voltage is set to a higher value,
U
i min
will be proportionally increased.
Measured with a resistive and max. admissible capacitive load.
Measured with a lead lenght of 0.1 m, leads twisted. Double output units with both outputs in parallel. 70/110 IMX 7 types need an
external capacitor at the input. (e.g. 1µF film or ceramic)
See 19 Pfl 1:
Electromagnetic Immunity.
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
U
i min
= 14.4 V.
Source impedance according to prETS 300132-2, version 4.3, at
U
i nom
.
U
o
U
o nom
t
rise
04008
t
start up
t
Fig. 5
Converter start-up and rise time
Edition 6/5.2000
5/18
Power technology
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