IMS30 SERIES
Powering Communciations and Technology
Input to output electric strength test 1500 V DC
Input voltage ranges 32...75VDC for -0302
Dual output
JAN, 2001
48V
input
Dual outputs 5V & 3.3V ; 3.3V & 1.8V
IMS30 Series
• Industry standard pin-out
• Fixed frequency operation
• High efficiency up to 89 %
• 2" x 2" platform with 9.4 mm profile
• Low output noise
• Soft start
• Shut down input, output voltages adjustable
• Programmable input undervoltage lockout
• Synchronisation
• Outputs no-load, overload and short-circuit proof
• Operating ambient temperature –40...71
o
C
• Thermal protection with auto-reset (non latching)
• Emissions below EN 55022, level B
• Immunity to IEC/EN 61000-4-2,-3,-4,-5 and -6
Safety according to IEC/EN 60950, UL 1950
LGA
C
Approvals pending
Summary
The IMS 30 series of board mountable 30 Watt DC-DC con-
verters has been designed according to the latest industry
requirements and standards. The converters are particu-
larly suitable for applications in industry and telecommuni-
cation where variable input voltages or high transient volt-
ages are prevalent.
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 systems
where the bus voltage may exceed the SELV limit of
60 V DC. They are designed and built according to the in-
ternational safety standards IEC/EN 60950, UL 1950, CAN/
CSA C22.2 No.950-95. Approvals pending.
The circuit comprises integrated planar magnetics and all
components are automatically assembled and soldered
onto a single PCB without any wire connections. The pro-
prietary magnetic feedback solution ensures maximum reli-
abilityand 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 ambi-
ent temperature of 71°C in free air without using any potting
material.
Page
Auxiliary Functions .......................................................... 6
Electromagnetic Compatibility (EMC) ............................. 7
Immunity to Environmental Conditions ............................ 8
Mechanical Data ............................................................. 9
Safety and Installation Instructions ............................... 10
Description of Option ..................................................... 11
Table of Contents
Page
Summary ......................................................................... 1
Type Survey and Key Data ............................................. 2
Type Key ......................................................................... 2
Functional Description ..................................................... 2
Electrical Input Data ........................................................ 3
Electrical Ouput Data ...................................................... 4
1/11 10130 DC
Type Survey and Key Data
Table 1: Type survey
Output 1
U
o1 nom
I
o1 nom
[V DC]
[A]
5.1
3.3
4.5
4.0
Output 2
I
o1 nom
U
o2 nom
[V DC]
[A]
3.3
1.8
6.0
5.0
Output power
P
o nom
[W]
30
22
Input Voltage Range and Efficiency
U
i min
...U
i max
typ
32...75 V DC
[%]
48 IMS 30-0503-9G
48 IMS 30-0302-9G
87
83
Option
i
i
Type Key
48 IMS 30 - 0503 -9 G i
Input voltage range
U
i
32...75 V DC
....................................
48
Series ...................................................................... IMS 30
Output voltage type output .................... ( 5.1 and 3.3Vout)
Operating ambient temperature range
T
A
–40...71°C .................................................. -9
Synchronous rectifier ...................................................... G
Option:
Inhibit ............................................................ i
Functional Description
The IMS 30 series of DC-DC converters are magnetic feed-
back controlled forward converters using current mode
PWM (Pulse Width Modulation).
This product range features synchronous rectifiers deliver-
ing in very high efficiency. The output voltage of these ver-
sions can be adjusted via the Trim input. The Trim input is
referenced to the secondary side and allows for program-
ming of the output voltage in the range of approximately 90
to 110% of
U
o nom
using an external resistor.
The voltage regulation is achieved with a magnetic feed-
back circuit providing excellent line and load regulation.
Current limitation is provided by the primary circuit, thus
limiting the total output power to approx. 130% of
P
o nom
(see:
Type Survey).
The shut down input allows remote
converter on/off.
Overtemperature protection will shut down the unit in ex-
cessive overload conditions with automatic restart.
Vi –
2
W
3
17
Trim
13
Uo1+
Vi+
1
11
Uo2+
SD
PUL
4
i
PWM
15
Com
4n7F
1500 V
Fig. 1
Block diagram (-0503, -0302 Outputs )
2/11
Electrical Input Data
General conditions:
– T
A
= 25 C, unless
T
C
is specified.
– Shut down pin left open circuit (not connected).
– Trim input not connected.
Table 2: Input Data
Input
Characteristics
Conditions
min
32
48
100
0.25
0.5
0.1
5
ms
40
mA
uF
0.7
5
1
2
mA
A
kHz
60
B
mA
pp
V DC
s
48 IMS
typ
max
75
Unit
V DC
U
i
U
i nom
U
i sur
t
start up
t
rise
I
i NL
C
i
U
SD
Input voltage range
1
Nominal input voltage
Repetitive input surge
voltage
Converter
Switch on
start-up time
SD high
Rise time
No load input current
Input capacitance
Shut down voltage
T
C min
...T
C max
I
o
= 0...I
o nom
max 3 s
U
i min
,
I
o
=
I
o nom 2
I
o
= 0,
U
i min
...U
i max
SD high
for surge calculation
Unit disabled
Unit operating
–10
1.5
30
1.5
I
SD
I
inr p
f
s
I
i rr
u
i RFI
1
Input current of SD input
Inrush peak current
4
Switching frequency
Reflected
ripple current
Input RFI level conducted
U
i
=
U
i nom
U
i min
,
I
o nom
I
o
= 0...I
o nom
EN 55022
3
1.5
approx. 250
2
3
4
U
i min
will not be as stated if
U
o
is increased above
U
o nom
by use of the Trim input. If the output voltage is set to a higher value,
U
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.
Source impedance according to prETS 300132-2, version 4.3.
Inrush Current
The inrush current has been kept as low as possible by
choosing a very small input capacitance.
A series resistor may be installed in the input line to further
limit this current.
I
[A]
1.4
1.2
1
0.8
0.6
0.4
0.2
0
–2
–1
0
1
2
3
4
5
6
7
04058
Input Undervoltage Lock-out
The IMS30 converters are fitted with a defined input under-
voltage lock-out:
turn off
turn on
(approx. values)
U
o
U
o nom
48 IMS 30
31.5 V
32 V
04008
t
rise
t
t
start up
t
[ms]
8
Fig. 3
Converter start-up and rise time (applying U
i nom
).
Fig. 2
Typical inrush current at U
i nom
, P
o nom
versus time
(48 IMS30-0503-9G). Source impedance according to
prETS 300132-2, version 4.3 at U
i nom
.
3/11
Input Transient Voltage Protection
A built-in suppressor diode provides effective protection
against input transients which may be caused for example
by short-circuits accross the input lines where the network
inductance may cause high energy pulses.
Table 4: Components for external circuitry to comply with
IEC/EN 61000-4-5, level 2 or ETR 283 (19Pfl1)
(48 IMS types).
Circuit Ref.
L
48 IMS 30
150 uH
100 uF, 100 V, 85 C
Table 3: Built-in transient voltage suppressor
Type
Breakdown
voltage
V
BR nom
[V]
100
Peak power
at 1 ms
P
P
[W]
600
Peak pulse
current
I
PP
[A]
4.1
C
Reverse Polarity Protection at the Input
The built-in suppressor diode also provides for reverse po-
larity protection at the input by conducting current in the re-
verse direction. An external fuse is required to limit this cur-
rent:
48 IMS 30: 3.15 A (F3.15A)
48 IMS 30
For very high energy transients as for example to achieve
IEC/EN 61000-4-5 or ETR 283 (19 Pfl1) compliance (as per
table:
Electromagnetic Immunity)
an external inductor and
capacitor are required.
04009
L
V+
C
V–
+
1
Vi+
Module
2
Vi–
Fig. 4
Example for external circuitry to comply with
IEC/EN 61000-4-5 or ETR 283 (19 Pfl1) (48 IMS 30 types).
Electrical Ouput Data
Table 5a: Output data.
Model
48IMS30-0503-9G
Conditions
min
5.00
0
5.1 V
typ max
5.20
3.5
6
+/-0.5
See Fig. 6
75
2000
3.3 V
min typ max
3.25
0
3.35
6
9
+/-0.5
+/-1
50
2000
250
1
0.02
mV
pp
uF
mV
ms
%/K
%
Unit
V
A
Characteristics
U
o1
I
o nom
I
oL
U
o
u
o1
C
o ext
u
o d
t
d
Uo
Output voltage
Output current
Current limit
1
U
i nom
,
I
o
= 0.5
I
o nom
U
i min
...U
i max
U
i nom
U
i min
...U
i max
I
o
= (0...1)
I
o nom
Line regulation
Load regulation
Output voltage noise
2
Admissible capacitive load
Dynamic
load
regulation
Voltage deviation
Recovery time
U
i nom
I
o nom
250
1
/
2
I
o nom
1
0.02
Temperature coefficient
U
o
/
T
C
48IMS30-0302-9G
U
i nom
,
I
o nom
T
C min
...T
C max
Table 5b: Output data.
Model
3.3 V
Conditions
min
3.25
0
typ max
3.35
4
6
+/-0.5
See Fig. 6
50
2000
min
1.77
0
1.8 V
typ max
1.83
5
7
+/-0.5
+/-3
50
2000
150
1
0.02
mV
pp
uF
mV
ms
%/K
%
Unit
V
A
Characteristics
U
o1
I
o nom
I
oL
U
o
u
o1
C
o ext
u
o d
t
d
Uo
Output voltage
Output current
Current limit
1
U
i nom
,
I
o
= 0.5
I
o nom
U
i min
...U
i max
U
i nom
U
i min
...U
i max
I
o
= (0...1)
I
o nom
Line regulation
Load regulation
Output voltage noise
2
Admissible capacitive load
Dynamic
load
regulation
Voltage deviation
Recovery time
U
i nom
I
o nom
250
1
/
2
I
o nom
1
0.02
1
2
U
i nom
,
I
o nom
T
C min
...T
C max
The current limit is primary side controlled.
BW = 20 MHz
Temperature coefficient
U
o
/
T
C
4/11
Fig 6: Cross regulation and load regulation for double output units.
Unspecified Output Current (A)
Regulation window for unspecified output (Tab 5a,5b)
+/-4%
+/-3%
+/-1%
100 %
30W Output power limit line
Specified Output Current (A)
50 %
1.0
2.0
3.0
4.0
5.0
6.0
Specified Output Current (A)
5/11
Talking
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