IMX4 DC-DC Series Data Sheet
4-Watt DC-DC Converters
Features
•
Extremely wide input voltage ranges
•
Rated to Basic isolation
•
Electrical isolation, single and dual outputs
•
Immunity to IEC/EN 61000-4-2, -3, -4, -5 and -6
•
High efficiency (typ. 82%)
• Flex power: flexible load distribution
•
No load and short-circuit proof
•
High reliability and no derating
Input voltage ranges up to 121 V DC
1 or 2 outputs up to 48 V DC
Up to 2000 VDC I/O electric strength test
•
Operating ambient temperature –40 to +85 °C
•
Industrial and alternative pinout
•
DIL 24 case with 8.5 mm profile
Safety according to IEC/EN 60950, UL 1950
LGA
1
20
0.8"
1
8.5
0.34"
32
1.25"
For 70IMX4 types
Description
The IMX4 Series of board-mountable, 4 watt dc-dc converters has
been designed according to the latest industry requirements and
standards. The converters are particularly suitable for use in mobile
or stationary applications in transport, industry or telecom where
variable input voltages or high transient voltages are prevalent.
Covering a total input voltage range from 8.4 V DC up to 121 V DC
with three different types the units are available with single and dual
outputs from 3.3 up to ±24 V DC with flexible load distribution on
dual outputs. Features include efficient input and output filtering
with unsurpassed 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 exhibit basic insulation and are designed and built
according to the international safety standards IEC/EN 60950, UL
1950, CAN/CSA C22.2 No.950-95 and are LGA and UL marked.
70IMX4 types have are also CE marked.
A special feature is their small case size, DIL 24 with only 8.5 mm
profile. The circuit comprises integrated planar magnetics and all
components are automatically assembled and solidly soldered
onto a single PCB without any wire connections. Thanks to the rigid
mechanical design the units withstand an extremely high level
of shock and vibrations. 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.
Various options as e.g., extended temperature range
–40 to 85°C, or K-pinout, an alternative to the standard
industrial pinout, provide a high level of application specific
engineering and design-in flexibility.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ................................. 8
Mechanical Data .................................................................. 9
Immunity to Environmental Conditions ............................. 10
Safety and Installation Instructions .................................... 11
Description of Options ....................................................... 12
Description ...................................................................................... 1
Model Selection .............................................................................. 2
Part Number Description ................................................................ 2
Functional Description .................................................................... 3
Electrical Input Data ....................................................................... 4
Electrical Output Data .................................................................... 6
REV. AUG 05, 2004
Page 1 of 12
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IMX4 DC-DC Series Data Sheet
4-Watt DC-DC Converters
Model Selection
Table 1: Model Selection
Output 1
V
o1 nom
I
o1 nom
[V DC]
[A]
1
3.3
3.3
5
5
5
12
12
12
15
15
15
+5
+5
+5
+12
+12
+15
+15
+24
+24
1
2
Output 2
V
o2 nom
I
o2 nom
[V DC]
[A]
1
-
-
-
-
-
-
-
-
-
-
-
–5
–5
–5
–12
–12
–15
–15
–24
–24
-
-
-
-
-
-
-
-
-
-
-
350
350
350
170
170
140
140
80
80
Output Power
P
o nom
[W]
3.0
3.0
3.5
3.5
3.5
4.1
4.1
4.1
4.2
4.2
4.2
3.5
3.5
3.5
4.1
4.1
4.2
4.2
3.8
3.8
Input voltage
range
[V DC]
8.4 to 36
16.8 to 75
8.4 to 36
16.8 to 75
40 to 121
8.4 to 36
16.8 to 75
40 to 121
8.4 to 36
16.8 to 75
40 to 121
8.4 to 36
16.8 to 75
40 to 121
8.4 to 36
16.8 to 75
8.4 to 36
16.8 to 75
8.4 to 36
16.8 to 75
Efficiency
h
typ
[%]
79
80
81
81
81
82
82
82
82
82
82
81
81
81
82
82
82
82
83
83
Model
Options
2
900
900
700
700
700
340
340
340
280
280
280
350
350
350
170
170
140
140
80
80
20IMX4-03-9
40IMX4-03-9
20IMX4-05-9
40IMX4-05-9
70IMX4-05-9
20IMX4-12-9
40IMX4-12-9
70IMX4-12-9
20IMX4-15-9
40IMX4-15-9
70IMX4-15-8
20IMX4-0505-9
40IMX4-0505-9
70IMX4-0505-8
20IMX4-1212-9
40IMX4-1212-9
20IMX4-1515-9
40IMX4-1515-9
20IMX4-2424-9
40IMX4-2424-9
-8, Z
-8, Z
-8, K, Z
-8, K, Z
-8
-8, K
-8, K
-8
-8, K
-8, K
-8, K, Z
-8, K, Z
-8, K, Z
-8, Z
-8, K, Z
-8, K, Z
-8, Z
-8, Z
Flexible load distribution on double outputs possible.
Not all options/combinations exist; to check if option exists and/or for minimum order quantity and lead time contact Power-One.
Part Number Description
20 IMX4 - 05 05 -9 K Z
Input voltage range
V
i
8.4 to 36 V DC ........................................... 20
16.8 to 75 V DC ......................................... 40
40 to 121 V DC .......................................... 70
Series ......................................................................... IMX4
Output voltage type for output 1 ........... 03, 05, 12, 15, 24
Output voltage type for output 2 .................. 05, 12, 15, 24
Operating ambient temperature range
T
A
–40 to 71°C ................................................ -9
–40 to 85°C ................................................ -8
Options:
Alternative pinout ......................................... K
Open frame ................................................. Z
40IMX4-0505-8K: dc-dc converter, input voltage range 16.8 to 75 V, 2 outputs providing ±5 V, 350 mA,
temperature range –40 to 85°C, alternative pinout.
Example:
REV. AUG 05, 2004
Page 2 of 12
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IMX4 DC-DC Series Data Sheet
4-Watt DC-DC Converters
Functional Description
The IMX4 dc-dc modules are feedback controlled flyback
converters using current mode PWM (Pulse Width Modulation).
The converter input is protected against transients by means of a
suppressor diode.
The output voltage is monitored by a separate transformer winding
close to the secondary windings and fed back to the control circuit.
Current limitation is provided by the primary circuit, thus limiting
the total output current (I
o nom
for the single and
03044
I
o1 nom
+
I
o2 nom
for the dual output types).
The close magnetic coupling provided by the planar
construction ensures very good regulation and allows for
flexible load distribution on dual output types.
03045
Vi+
22
23
14
Vo+
Vi+
22
23
14
Vo+
PWM
16
Vo–
2
PWM
16
Go
2
10
Vi–
3
Vi–
3
11
Vo–
Fig. 1
Block diagram for single output types.
Standard industrial pinout.
Fig. 2
Block diagram for dual output types.
Standard industrial pinout.
03046
03047
Vi+
1
n.c.
2
PWM
13
Vo+
Vi+
1
PWM
15
Vo+
10
12
Vo–
11
Go
Vi–
24
Vi–
24
13
Vo–
Fig. 3
Block diagram for single output types.
Special pinout (option K).
Fig. 4
Block diagram for dual output types.
Special pinout (option K).
REV. AUG 05, 2004
Page 3 of 12
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IMX4 DC-DC Series Data Sheet
4-Watt DC-DC Converters
Electrical Input Data
General conditions:
T
A
= 25°C, unless
T
C
is specified.
Table 2: Input Data
Input
Characteristics
Conditions
20IMX4
40IMX4
70IMX4
Unit
V DC
min typ max min typ max min typ max
8.4
20
40
0.25 0.5
resistive load
capacitive load
5
12
15
0.54
3.7
approx. 400
100
B
1
B
1
20
36 16.8
4
40
100
0.25 0.5
5
12
5
0.3
4.2
approx. 400
60
A
10
75
40
70
150
0.25 0.5
5
12
5
0.15
5.6
approx. 400
30
10
mA
µF
A
kHz
mA
pp
s
ms
121
V
i
V
i nom
V
i sur
t
start up
t
rise
I
i o
C
i
I
inr p
f
s
I
i rr
u
i RFI
1
2
3
4
Input voltage range
Nominal input voltage
Repetitive surge voltage
Converter start-up time
1
Rise time
1
T
C min
to
T
C max
I
o
= 0 to
I
o nom
abs. max input (3 s)
Worst case condition at
V
i min
and full load
V
i nom
I
o nom
I
o
= 0,
V
i min
to
V
i max
for surge calculation
No load input current
Input capacitance
Inrush peak current
Switching frequency
Reflected ripple current
Input RFI level
conducted and radiated
V
i
=
V
i nom 3
V
i min
to
V
i max
,
I
o
= 0 to
I
o nom
I
o
= 0 to
I
o nom
EN 55022
2
Measured with a resistive or max. admissible capacitive load. (See fig.:
Converter start-up and rise time)
External filter required. (See:
Filter recommendations for compliance with EN 55022)
Source impedance according to prETS 300132-2, version 4.3.
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
Reverse Polarity Protection at Input
04008
t
start up
t
Fig. 5
Converter start-up and rise time
Inrush Current
The inrush current has been kept as low as possible by
choosing a very small input capacitance. A series resistor
may be inserted in the input line to limit this current further.
1 A/Div.
4
3
04034
The suppressor diode on the input also provides for
reverse polarity protection by conducting current in the
reverse direction, thus protecting the unit. An external fuse
is required to limit this current:
– For 20IMX4 a fast 1 A (F1A) fuse is recommended
– For 40IMX4 a fast 0.63 A (F0.63A) fuse is recommended
– For 70IMX4 a fast 0.35 A (F035A) fuse is recommended
Filter recommendations for compliance with EN55022
Electromagnetic emission requirements according to table
Input data
can be achieved by adding an external capacitor
as close as possible to the input terminals.
04035
Vi+
C
i
2
Vi–
1
0
Fig. 7
Input filter arrangement
Table 3: Input filter components (EN 55022)
Fig. 6
Typical inrush current at V
i nom
, P
o nom
versus time
(40IMX4) measured according to prETS 300132-2,
version 4.3.
REV. AUG 05, 2004
5
µs/Div.
Ref.
C
1
Type
20IMX4
4.7
µF
,
63 V,
85°C
40IMX4
2.2
µF
,
100 V,
85°C
ceramic or film
70IMX4
2.2
µF
,
150 V,
85°C
Page 4 of 12
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IMX4 DC-DC Series Data Sheet
4-Watt DC-DC Converters
Input Transient Voltage Protection
In many applications transient voltages on the input of the
converter are always a possibility. These may be caused
for example by short circuits between Vi+ and Vi– where
the network inductance may cause high energy pulses.
In order to protect the converter a large transient voltage
suppressor has been fitted to the input of the IMX4 types.
Specifications as on table below.
To withstand the 150 V transient according to 19 Pfl 1,
applicable for 40IMX4 types, the same external circuitry
with similar components as for IEC/EN 61000-4-5, level 2
compliance can be used.
L
Vi+
C
Peak Pulse
Current
I
PP
04036
+
Table 4: Built-in transient voltage suppressor
Type
Breakdown
Voltage
V
BR nom
600 W
600 W
600 W
Peak Power
at 1 ms
P
P
10.3 A
4.1 A
2.9 A
D
Vi–
20IMX440 V
40IMX4100 V
70IMX4150 V
Fig. 8
Example for external circuitry to comply with
IEC/EN 61000-4-5, level 2.
5
10.5
04029
If transients generating currents above the peak pulse
current
I
PP
are possible then an external limiting network
such as the circuit recommended for IEC/EN 61000-4-5
Level 2 compliance is necessary.
To achieve IEC/EN 61000-4-5, level 2 compliance an
additional transzorb, inductor and capacitor should be
provided externally as shown in the figure below. The
components should have similar characteristics as listed
in the table below.
∅
0.7
Fig. 9
Dimensions for inductor L
Table 5: Components for external circuitry (IEC/EN 61000-4-5)
Circuit Ref.
L
C
D
20IMX4
330
µH,
0.42
Ω,
0.6 A
TDK TSL1110-331KR55
68
µF,
63 V, 85°C
Motorola 1.5KE 39 A
40IMX4
330
µH,
0.42
Ω,
0.6 A
TDK TSL1110-331KR55
68
µF,
100 V, 85°C
Motorola 1.5KE 82 A
70IMX4
330
µH,
0.65
Ω,
0.62 A
Toko, 494LXF-0098K
100
µF,
150 V, 85°C
–
REV. AUG 05, 2004
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11.5
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