IMS6 Series Data Sheet, 6-Watt DC-DC Converters
Input to output electric strength test up to 2 kVDC
Input voltage ranges:
18 to 36 and 36 to 75 VDC
Single and dual outputs of 5, 12, & 15 VDC
Features
•
RoHS lead-solder-exempt compliant
•
Wide input voltage ranges
•
Rated to Basic Isolation
•
Electrical isolation, single and dual outputs
•
Immunity to IEC/EN 61000-4-2, -3, -4, and -6
•
High efficiency (typ. 84%)
•
Flex power: flexible load distribution
•
No load and short-circuit proof
•
High reliability and no derating
•
Operating ambient temperature –40 to +71 °C
20
0.8"
8.5
0.34"
32
1.25"
•
Industrial and alternative pinouts
•
DIL 24 case with 8.5 mm profile
Safety according to IEC/EN 60950, UL 1950
LGA
Description
The IMS6 Series of board-mountable 6 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 telecommunications
where variable input voltages or high transient voltages are
prevalent.
Covering a total input voltage range from 18 VDC up to
75 VDC, with single and dual outputs from 5 VDC up to
±15 VDC with flexible load distribution on dual outputs.
The converters 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.
A special feature is their small case size, DIL 24 with only
an 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 converters 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 71 °C in free air without using
any potting material.
Option:- K-pinout, an alternative to the standard industrial
pinout, provides a high level of application specific
engineering and design-in flexibility.
Table of Contents
Page
Page
Thermal considerations .................................................... 6
Mechanical Data .............................................................. 7
Electromagnetic Compatibility (EMC) .............................. 7
Immunity to Environmental Conditions ............................. 8
Safety and Installation Instructions .................................. 9
Description of Options .................................................... 10
Description ....................................................................... 1
Model Selection ............................................................... 2
Part Number Description .................................................. 2
Functional Description ..................................................... 3
Electrical Input Data ......................................................... 4
Electrical Output Data ...................................................... 5
JUN 14, 2004 revised to JUL 27, 2006
Page 1 of 10
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IMS6 Series Data Sheet, 6-Watt DC-DC Converters
Model Selection
Table 1: Model Selection
Output 1
U
o1 nom
I
o1 nom
[VDC]
[A]
1
Output 2
U
o2 nom
I
o2 nom
[VDC]
[A]
1
Output Power
P
o nom
[W]
Input voltage
range
[VDC]
Efficiency
η
typ
[%]
Type
designation
Options
2
5
5
12
12
15
15
+5
+5
+12
+12
+15
+15
1
2
1000
1000
500
500
400
400
500
500
250
250
200
200
-
-
-
-
-
-
–5
–5
–12
–12
–15
–15
-
-
-
-
-
-
500
500
250
250
200
200
5.0
5.0
6.0
6.0
6.0
6.0
5.0
5.0
6.0
6.0
6.0
6.0
18...36
36...75
18...36
36...75
18...36
36...75
18...36
36...75
18...36
36...75
18...36
36...75
82
82
83
83
84
84
82
82
83
83
84
84
24IMS6-05-9
48IMS6-05-9
24IMS6-12-9
48IMS6-12-9
24IMS6-15-9
48IMS6-15-9
24IMS6-0505-9
48IMS6-0505-9
24IMS6-1212-9
48IMS6-1212-9
24IMS6-1515-9
48IMS6-1515-9
Z
Z
Flexible load distribution on double outputs possible.
Not all -K/-Z options exist, to check if option exists and/orfor minimum quantity and lead time contact Power-One.
Part Number Description
24 IMS 6 - 12 12 -9 K Z
Input voltage range
V
i
18 to 36 VDC ............................................. 24
36 to 75 VDC ............................................. 48
Series ......................................................................... IMS6
Output voltage type for output 1 ......................... 05, 12, 15
Output voltage type for output 2 ......................... 05, 12, 15
Operating ambient temperature range
T
A
–40 to 71 °C ................................................ -9
Options:
Alternative pinout (check availability) .......... K
Open frame .................................................. Z
Examples: 48IMS6-1212-9Z: DC-DC converter, input voltage range 36 to 75V, 2 outputs providing ±12 V, 250 mA,
temperature range –40 to 71 °C, no case.
JUN 14, 2004 revised to JUL 27, 2006
Page 2 of 10
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IMS6 Series Data Sheet, 6-Watt DC-DC Converters
Functional Description
The IMS6 DC-DC converters 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.
03044
Current limitation is provided by the primary circuit, thus
limiting the total output current (I
o nom
for the single and
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
PWM
16
Vo–
2
2
16
Go
Vi–
3
10
Vi–
3
11
Vo–
Fig. 1
Block diagram for single output types.
Standard industrial pinout.
03046
Fig. 2
Block diagram for dual output types.
Standard industrial pinout.
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).
JUN 14, 2004 revised to JUL 27, 2006
Page 3 of 10
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IMS6 Series Data Sheet, 6-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
min
18
24
40
0.25
0.5
5
12
15
20
0.54
3.7
approx. 400
30
B
B
approx. 400
30
5
0.25
24IMS6
typ
max
36
min
36
48
100
0.5
5
12
10
0.3
4.2
mA
μF
A
kHz
mA
pp
s
ms
48IMS6
typ
max
75
Unit
V DC
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
V
i RFI
1
2
3
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
resistive load
capacitive load
No load input current
Input capacitance
Inrush peak current
Switching frequency
Reflected ripple current
Input RFI level
conducted and radiated
I
o
= 0,
V
i min
to
V
i max
for surge calculation
V
i
=
V
i nom 3
V
i min
...V
i max
,
I
o
= 0...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 standards)
Source impedance according to prETS 300132-2, version 4.3.
V
o
V
o nom
t
rise
Reverse Polarity Protection at Input
04008
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:
t
t
start up
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
2
1
0
– For 24IMS6 a fast 1 A (F1A) fuse is recommended
– For 48IMS6 a fast 0.63 A (F0.63A) fuse is recommended
Filter recommendations for compliance with EN 55022
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+
04034
C
i
Vi–
Fig. 7
Input filter arrangement
Table 3: Input filter components (EN 55022)
Ref.
24IMS6
4.7
μF
,
63 V,
85°C
48IMS6
2.2
μF
,
100 V,
85°C
C
1
Type
5
μs/Div.
Fig. 6
Typical inrush current at U
i nom
, P
o nom
versus time meas-
ured according to prETS 300132-2, version 4.3.
ceramic or film
JUN 14, 2004 revised to JUL 27, 2006
Page 4 of 10
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IMS6 Series Data Sheet, 6-Watt DC-DC Converters
Electrical Output Data
General conditions:
T
A
= 25°C, unless
T
C
is specified.
Table 4a: Output data for single output units
Output
Characteristics
Conditions
V
o nom
min
5V
typ
max
min
12 V
typ
max
12.10
500
1400
±1
±3
80
700
±1
±3
120
40
60
130
150
±250
1
±0.02
min
14.88
15 V
typ
max
15.12
400
600
±1
±3
150
50
75
130
100
±250
1
±0.02
%
μF
mV
ms
%/K
mV
pp
%
Unit
VDC
mA
V
o
I
o L
Δ
V
Output voltage
V
i nom,
I
o
= 0.5
I
o nom
4.96
V
i min
to
V
i max
V
i nom
,
T
C
= 25°C
V
i min...
V
i max
,
I
o nom
V
i nom
I
o
= (0.1...1)
I
o nom
V
i min
to
V
i max
I
o
=
I
o nom
Min. load 1%
1000
5.04 11.90
I
o nom
Output current
Current limit
2
Δ
V
o U
Line regulation
Load regulation
V
o1, 2
Output voltage noise
V
o clp
Output overvoltage
limitation
C
o ext
Admissible
capacitive load
3
V
o d
t
d
α
Vo
20
40
130
680
Dynamic Voltage deviat.
V
i nom
load
Recovery time
I
o nom
×
1/2
Io
nom
regulat.
Temperature coefficient
Δ
V
o
/ΔT
C
±250
1
±0.02
V
i min
to
V
i max
I
o
= 0 to
I
o nom
Table 4b: Output data for dual output units
Output
Characteristics
Conditions
V
o nom
min
±5 V
typ
max
±12 V
min
typ
max
±15 V
min
typ
max
15.12
15.15
2 x 200
2 x 4.2
±1
±3.5
140
45
70
130
150
±600
1
±0.02
±750
1
±0.02
50
±1
±3
150
75
130
100
%
μF
mV
ms
%/K
mV
pp
Unit
VDC
mA
W
%
V
o1
V
o2
P
o L
Δ
V
Output voltage
V
i nom
4.96
I
o1
=
I
o2
= 0.5
I
o nom
4.95
V
i min
...V
i max
V
i nom
,
T
C
= 25°C
V
i min
...V
i max
,
I
o nom
V
i nom
I
o
= (0.1...1)
I
o nom
V
i min
...V
i max 5
I
o
=
I
o nom 6
Min. load 1%
2 x 500
2 x 3.5
5.04 11.90
5.05 11.88
2 x 250
2 x 4.0
±1
±3
100
40
60
130
680
12.10 14.88
12.12 14.85
I
o nom
Output current
1
Power limit
2 3
Δ
V
o U
Line regulation
Load regulation
4
V
o1, 2
Output voltage noise
V
o clp
Output overvoltage
limitation
C
o ext
Admissible
capacitive load
3
V
o d
t
d
α
Vo
1
2
3
4
5
6
Dynamic Voltage deviat.
load
Recovery time
regulat.
Temperature coefficient
Δ
U
o
/Δ
T
C
V
i nom
I
o nom
×
1
/
2
I
o nom
V
i min
to
V
i max
I
o
= 0 to
I
o nom
±250
1
±0.02
Each output capable of delivering full output power.
The current limit is primary side controlled.
Sum of both outputs.
Conditions for specified output. Other output loaded with constant current
I
o
= 0.5
I
o nom
.
BW = 20 MHz.
Measured with a probe according to EN 61204.
JUN 14, 2004 revised to JUL 27, 2006
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