Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 1/14
15 Watt DC-DC Converters IMS 15 Series
Wide input voltage ranges up to 75 V DC
1 or 2 outputs up to 48 V DC
1500 V DC I/O electric strength test voltage
• Electrical isolation, also between outputs
• Emissions below EN 55022, level B
• Immunity to IEC/EN 61000-4-2,-3,-4,-5 and -6
• High efficiency (typ. 86%)
• Input undervoltage lock-out
• Shut down input, output voltages adjustable
• Flex power: Flexible load distribution on outputs
• Outputs no-load, overload and short-circuit proof
• Operating ambient temperature –25...71ºC
• Thermal protection
•2" × 1.6" case with 10.5 mm profile
• Supplementary insulation
Table of Contents Page
Summary .......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key and Product Marking ........................................ 2
Functional Description...................................................... 3
Electrical Input Data ......................................................... 4
Electrical Ouput Data ....................................................... 5
Page
Auxiliary Functions ........................................................... 8
Electromagnetic Compatibility (EMC) .............................. 9
Immunity to Environmental Conditions........................... 10
Mechanical Data ............................................................ 11
Safety and Installation Instructions ................................ 12
Description of Option ..................................................... 14
Summary
The IMS 15 series of board mountable 15 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-
cations where variable input voltages or high transient
voltages are prevalent.
Providing two wide input voltage ranges, 14...36 V DC and
36...75 V DC, the units are available with single, dual and
electrically isolated double outputs allowing the configura-
tion of output voltages from 3.3 up to 48 V DC externally ad-
justable, with flexible load distribution on dual and double
output units. A shut down input allows remote converter on/
off. Features include efficient input and output filtering with
unsurpassed transient and surge protection, low output rip-
ple and noise, consistently high efficiency over the entire
input voltage range, high reliability as well as excellent dy-
namic 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, built and approved according
to the international safety standards IEC/EN 60950, UL
1950, CAN/CSA C22.2 No.950-95.
The circuit comprises of integrated planar magnetics and
all components are automatically assembled and solidly
soldered onto a single PCB without any wire connections.
The proprietary magnetic feedback solution ensures maxi-
mum 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 71°C in free air without using
any potting material. An extended temperature range –
40...71°C is available as an option. For extremely high vi-
bration environments the case has holes for screw mount-
ing.
Safety according to IEC/EN 60950, UL 1950
51
2.0"
40.6
1.6"
10.5
0.42"
LGA
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 2/14
Type Key and Product Marking
Type Key
24 IMS 15 - 05 - 05 -9 R K i C L Z
Input voltage range
U
i
14...36 V DC .............................................. 24
36...75 V DC .............................................. 48
Series ...................................................................... IMS 15
Output voltage type output 1 ........................ 05, 12, 15, 24
Dash designates double output unit with two
independent electrically isolated outputs ...... - 1
Output voltage type output 2 .................. 03, 05, 12, 15, 24
Operating ambient temperature range
T
A
–40...71°C .................................................. -9
R input and magnetic feedback ...................................... R 2
Option: Alternative pinout ......................................... K 3
Inhibit ............................................................ i 1 3
Industrial C-pinout ...................................... C
Surface mount version with PCB lid ............ L
Open frame .................................................. Z
1Not applicable with option C or K and -0503 types
2Single output and -0503- types
3For minimum order quantity and lead time contact Power-One.
Examples: 48 IMS 15-05-05-9: DC-DC converter, input voltage range 36...75 V, 2 electrically isolated outputs each pro-
viding 5 V, 1.4 A.
24 IMS 15-0505-9K: DC-DC converter, input voltage range 14...36 V, alternative pinout with outputs ±5 V,
±1.4 A.
Product Marking
Basic type designation, output voltages and currents, applicable safety approval and recognition marks, Power-One patent
nos. and company logo. Side label: Date code and serial no.
Type Survey and Key Data
Table 1: Type survey
Output 1 Output 2 Output Input Voltage Range and Efficiency Option
U
o1 nom
I
o1 nom 1
U
o2 nom
I
o2 nom 1 power
U
i min...
U
i max htyp
U
i min...
U
i max htyp
[V DC] [A] [V DC] [A]
P
o nom [W] 14...36 V DC [%] 36...75 V DC [%]
5.1 2.7 - - 13.8 24 IMS 15-05-9R 84 48 IMS 15-05-9R 83 i, C, L, Z
12 1.4 - - 16.8 24 IMS 15-12-9C 88 48 IMS 15-12-9C 86
15 1.12 - - 16.8 24 IMS 15-15-9C 88 48 IMS 15-15-9C 86
5.1 1.6 3.3 1.6 13.5 24 IMS 15-0503-9R 82 48 IMS 15-0503-9R 82 i, L, Z
5 1.4 5 1.4 14 24 IMS 15-05-05-9 85 48 IMS 15-05-05-9 83 K 2, i, C, L, Z
12 0.7 12 0.7 16.8 24 IMS 15-12-12-9 88 48 IMS 15-12-12-9 86 K 2, i, C, L, Z
15 0.56 15 0.56 16.8 24 IMS 15-15-15-9 88 48 IMS 15-15-15-9 86 K 2, i, C, L, Z
24 0.35 24 0.35 16.8 24 IMS 15-24-24-9 87 48 IMS 15-24-24-9 86 i, C, L, Z
1Flexible load distribution on dual and double outputs possible up to 75% of
P
o nom on one of the 2 outputs, 24/48 IMS 15-0503-9 types
allow; 2 A max. on one of the 2 outputs. The other output should not exceed the difference to the total output power
P
o nom.
2Option K: Alternative pinout with common ground (Vo+, Go, Vo–), excludes option i, L, C, Z.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 3/14
Functional Description
The IMS 15 series of DC-DC converters are magnetic feed-
back controlled flyback converters using current mode
PWM (Pulse Width Modulation). The -05- and -0503- output
voltage versions feature an active magnetic feedback loop
via a pulse transformer which results in very tight regulation
of the output voltage (see fig.:
Block diagram, single and
-0503- output types
). The output voltages of these versions
can be adjusted via the R input. The R input is referenced to
the secondary side and allows for programming of the out-
put voltages in the range of approximately 80 to 105% of
U
o nom using either an external resistor or an external volt-
age source.
The voltage regulation on the dual and double output ver-
sions is achieved with a passive transformer feedback from
the main transformer (see fig.:
Block diagram, for double
output types
). The output voltages can be adjusted via the
Trim input. The Trim input is referenced to the primary side
of the converter and allows for programming of the output
voltages in the range 100 to 105% of
U
o nom by an external
resistor or within 75 to 105% using an external voltage
source.The load regulation output characteristic allows for
paralleling of one or several double output units of equal
output voltages.
Current limitation is provided by the primary circuit, thus
limiting the total output power of double output types 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 approxi-
mately every 50 to 60 ms.
PWM
2 × 2200 pF, 1500 V
1
2
3
4
11
12
15
13
Vi+
SD
Vi–
Vo1+
Vo1–
Trim Vo2+
Vo2–
03007
17 n.c.
Fig. 3
Block diagram, double output types, standard pinout.
Fig. 1
Block diagram, single output types.
PWM
2 × 2200 pF
1500 V
17
1
2
4
13
15
Vi+
SD
Vi–
Vo+
Vo–
R
03006
PWM
2 × 2200 pF, 1500 V
1
2
3
4
13
15
12
11
Vi+
SD
Vi–
Vo1+
Go
n.c. Vo2+
Go
03022
17
R
PWM
2 × 2200 pF, 1500 V
1
2
4
11
15
13
Vi+
SD
Vi–
Vo+
Go
Vo–
03023
17
n.c.
Fig. 4
Block diagram, dual output types, alternative K-pinout.
Fig. 2
Block diagram, -0503- types.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 4/14
Electrical Input Data
General conditions:
–T
A = 25°C, unless
T
C is specified.
–Shut down pin left open circuit (not connected).
–Trim or R input not connected.
Table 2: Input Data
Input 24 IMS 48 IMS
Characteristics Conditions min typ max min typ max Unit
U
iInput voltage range 1
T
C min...
T
C max 14 36 36 75 V DC
U
i nom Nominal input voltage
I
o = 0...
I
o nom 24 48
U
i sur Repetitive surge Abs. max input (3 s) 50 100
voltage
t
start up Converter Switch on Worst case condition at 0.25 0.5 0.25 0.5 s
start-up time SD high
U
i min and full load 2 0.1 0.1
t
rise Rise time
U
i nom,
I
o =
I
o nom 2 55ms
I
i o No load input current
I
o = 0,
U
i min...
U
i max 20 40 10 20 mA
C
iInput capacitance for surge calculation 4.0 2.0 µF
U
SD Shut down voltage Unit disabled –10...0.7 –10...0.7 V DC
Unit operating 2.0...20 2.0...20
R
SD Shut down input 10 10 kΩ
resistance
I
SD Input current
U
i min...
U
i max 1.2 3 1.2 3 mA
if unit shut down
I
inr p Inrush peak current 4
U
i =
U
i nom 54.5A
f
sSwitching frequency
U
i min...
U
i max,
I
o = 0...
I
o nom approx. 350 approx. 350 kHz
I
i rr Reflected
I
o = 0...
I
o nom 30 30 mApp
ripple current
u
i RFI Input RFI level conducted EN 55022 3 BB
1
U
i min will not be as stated if
U
o is increased above
U
o nom by use of the R or Trim input. If the output voltage is set to a higher value,
U
i min will be proportionally increased.
2Measured with a resistive and the max. admissable capacitive load.
3Measured with a lead lenght of 0.1 m, leads twisted. Double output units with both outputs in parallel.
4Source impedance according to ETS 300132-2.
U
o nom
U
o
t
start up
t
rise
t
04008
Fig. 6
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 installed in the input line to further
limit this current.
Fig. 5
Typical inrush current at U
i nom
, Po nom versus time
(48 IMS 15). Source impedance according to
prETS 300132-2, version 4.3 at U
i nom
.
I [A]
t [µs]
04022
010 20 30 40 50 60 70 80 90 100
4
3
2
1
Input Undervoltage Lock-out
The IMS 15 converters are fitted with a defined input under-
voltage lock-out (approx. values):
24 IMS 15 turn off 12.5 V
turn on 13 V
48 IMS 15 turn off 31.5 V
turn on 32 V
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 5/14
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 3: Built-in transient voltage suppressor
Type Breakdown Peak power Peak pulse
voltage at 1 ms current
V
BR nom [V]
P
P [W]
I
PP [A]
24 IMS 15 53 600 7.7
48 IMS 15 100 600 4.1
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.
Vi+
Vi–
C
L
V+
V–
Module
+
04009
1
2
Fig. 7
Example for external circuitry to comply with
IEC/EN 61000-4-5 or ETR 283 (19 Pfl1) (48 IMS15 types).
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. 24 IMS 15 48 IMS 15
L 150 µH, 0.294 Ω, 640 mA
TOKO: 494 LYF-0094K 1
C 150 µF, 63 V, 85°C 100 µF, 150 V, 85°C
1 Available from TOKO Components Division
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.
–For 24 IMS 15 types a fast 3.15 A (F3.15A) fuse is
recommended.
–For 48 IMS 15 types a fast 2 A (F2A) fuse is recom-
mended.
Electrical Output Data
General conditions:
T
A = 25°C, unless
T
C is specified. Shut down pin left open (not connected). Trim- or R-input not connected.
Table 5a: Output data for single output units and -0503- types.
Output 5.1 V 5.1/3.3 V
Characteristics Conditions min typ max min typ max Unit
U
o1 Output voltage
U
i nom 5.05 5.15 5.0 5.12 V
U
o2
I
o = 0.5
I
o nom 3.13 3.46
I
o nom Output current 1
U
i min...
U
i max 2.7 2 × 1.6 A
I
o1L Current limit 2, 4
U
i nom,
T
C = 25°C3.53.0
I
o2L
U
o = 90%
U
o nom 3.8
D
U
oLine/load regulation
U
i min...
U
i max,
I
o = (0.01...1)
I
o nom ±0.5 %
U
i min...
U
i max 5.1 V +3, –5
I
o = (0.1...1)
I
o nom 3.3 V ±4.5
u
o1/2 Output voltage noise
U
i min...
U
i max 570 80 mVpp
I
o =
I
o nom 640 40
U
o L Output overvoltage 115 130 115 130 %
limitation
C
o ext Admissible capacitive load 3 4000 total 4000 µF
u
o d Dynamic Voltage deviat.
U
i nom ±250 ±150 mV
t
dload Recovery time
I
o nom ↔ 0.5
I
o nom 11ms
regulation IEC/EN 61204
aUo Temperature coefficient
U
i min...
U
i max ±0.02 ±0.02 %/K
D
U
o/D
T
C
I
o = 0...
I
o max
1Flexible load distribution: 24/48 IMS 15-0503 types; 2 A max. on one of the 2 outputs, the other output should not be loaded such that
the total output power exceeds
P
o nom according to table:
Type survey
.
2The current limit is primary side controlled.
3Measured with both outputs connected in parallel. For -0503- types: total capacitance, both outputs.
4Conditions for specified output. Other output loaded with constant current
I
o = 0.5
I
o nom.
5BW = 20 MHz
6Measured with a probe according to EN 61204
7The overvoltage protection is not tracking with R/Trim control.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 6/14
Table 5b: Output data for dual and double output units.
Output 2 × 5 V 2 × 12 V 2 × 15 V 2 × 24 V
Characteristics Conditions min typ max min typ max min typ max min typ max Unit
U
o1 Output voltage
U
i nom 4.92 5.08 11.82 12.18 14.78 15.22 23.64 24.36 V
U
o2
I
o = 0.5
I
o nom 4.92 5.08 11.82 12.18 14.78 15.22 23.64 24.36
I
o nom Output current 1
U
i min...
U
i max 2 × 1.4 2 × 0.7 2 × 0.56 2 × 0.35 A
I
oL Current limit 2, 4
U
i nom,
T
C = 25°C 3.5 1.9 1.6 0.95
U
o = 90%
U
o nom
D
U
o U Line regulation
U
i min...
U
i max,
I
o nom ±1±1±1±1%
D
U
o l Load regulation
U
i nom ±3±3±3±3
I
o = (0.1...1)
I
o nom
u
o1/2 Output voltage noise
U
i min...
U
i max 580 120 150 240 mVpp
I
o =
I
o nom 640 60 75 80
U
o L Output overvoltage limit. 7 Min. load 1% 115 130 115 130 115 130 115 130 %
C
o ext Admissible capacitive load 3 4000 680 470 180 µF
u
o d Dynamic Voltage deviat.
U
i nom ±250 ±680 ±750 ±900 mV
t
dload Recovery time
I
o nom ↔ 1/2
I
o nom 1111ms
regulation
aUo Temperature coefficient
U
i min...
U
i max ±0.02 ±0.02 ±0.02 ±0.02 %/K
D
U
o/D
T
C
I
o = 0...
I
o max
1Flexible load distribution: Each output is capable of delivering 75% of
P
o nom according to table:
Type Survey
. The other output should
not exceed the difference to the total output power
P
o nom.
2The current limit is primary side controlled.
3Measured with both outputs connected in parallel.
4Conditions for specified output. Other output loaded with constant
current
I
o = 0.5
I
o nom.
5BW = 20 MHz
6Measured with a probe according to EN 61204
7The overvoltage protection is not tracking with R/Trim control.
Thermal Considerations
If a converter, mounted on a PCB, is located in free, quasi-
stationary air (convection cooling) at the indicated maxi-
mum ambient temperature
T
A max (see table:
Temperature
specifications
) and is operated at its nominal input voltage
and output power, the case temperature
T
C measured at the
Measuring point of case temperature
T
C (see:
Mechanical
Data
) will approach the indicated value
T
C max after the
warm-up phase. However, the relationship between
T
A and
T
C depends heavily on the conditions of operation and inte-
gration into a system. The thermal conditions are influenced
by input voltage, output current, airflow, temperature of sur-
rounding components and surfaces and the properties of
the printed circuit board.
T
A max is therefore only an indica-
tive value and under practical operating conditions, the am-
bient temperature
T
A may be higher or lower than this value.
Caution: The case temperature
T
C measured at the
Measuring point of case temperature
T
C (see:
Mechani-
cal Data
) may under no circumstances exceed the speci-
fied maximum value. The installer must ensure that un-
der all operating conditions
T
C remains within the limits
stated in the table:
Temperature specifications.
Overtemperature Protection
The converters are protected from possible overheating by
means of an internal temperature monitoring circuit. It shuts
down the unit above the internal temperature limit and at-
tempts to automatically restart every 50 to 60 ms. This fea-
ture prevents from excessive internal temperature building
up which could occur in heavy overload conditions.
Connection in Series
The outputs of one or several single or double output units
can be connected in series without any precautions, taking
into consideration that the highest output voltage should
remain below 42 V to ensure that the output remains SELV.
Connection in Parallel
Double outputs of the same converter with equal output
voltage (e.g. 5V / 5V) can be put in parallel and will share
their output currents almost equally. Parallel operation of
single or double outputs of two or more converters with the
same output voltage may cause start-up problems at initial
start-up. This is only advisable in applications where one
converter is able to deliver the full load current as e.g. re-
quired in true redundant systems.
Short Circuit Behaviour
The current limit characteristic shuts down the converter
whenever a short circuit is applied to its output. It acts self-
protecting and automatically recovers after removal of the
overload condition (hiccup mode).
Output Overvoltage Protection
The output of single output units as well as -0503- and
-05-05- types are protected against overvoltages by a sec-
ond control loop. In the event of an overvoltage on one of
the outputs the unit will shut down and attempt to restart
approximately every 50 to 60 ms. Double and dual output
units (with exception of the -0503- and -05-05- types) are
protected against overvoltages by a Zener diode across the
second output. Under worst case conditions the Zener di-
ode will short circuit. Since with double output units both
outputs track each other the protection diode is only pro-
vided in one of the outputs. The main purpose of this fea-
ture is to protect against possible overvoltages which could
occur due to a failure in the feedback control circuit. The
output overvoltage protection is not designed to withstand
externally applied overvoltages.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 7/14
Typical Performance Curves
General conditions :
T
A = 25ºC, unless
T
C is specified. Shut down pin left open circuit. Trim or R input not connected.
Fig. 8
U
o
versus I
o
(typ) of units with U
o
= 5.1 V.
Fig. 9
U
o
versus I
o
(typ) of double output units (2
×
12 V), with
both outputs in parallel.
7
8
9
10
11
12
13
U
o
[V]
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 I
o total
[A]
0
05020
5.5
5.0
4.5
4.0
3.5
3.0 012345
I
o
[A]
U
o
[V]
05019
Fig. 12
Efficiency versus input voltage and load. Typical values
(48 IMS 15-12-12).
40
50
60
70
80
90
h [%]
05040
25 50 75 100
P
o1
P
o nom
[%]
U
i nom
U
i max
U
i min
70
100
U
o
[%]
t
[ms]
05041
8
60
60
overload short circuit condition
switch-off
Fig. 13
Overload switch off (hiccup mode), typical values.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 8/14
a) Adjustment by means of an external resistor
R
ext:
Programming of the output voltage by means of an exter-
nal resistor
R
ext is possible within a limited range of
100...105% of
U
o nom.
R
ext should be connected between
the Trim pin and Vi–. Connection of
R
ext to Vi+ may dam-
age the converter. The following table indicates suitable
resistor values for typical output voltages under nominal
conditions (
U
i nom,
I
o = 0.5
I
o nom), with either paralleled
outputs or equal load conditions on each outputs.
b) Adjustment by means of an external voltage source
U
ext.
For external output voltage programming in the range
75...105% of
U
o nom a (0...20 V) source
U
ext is required,
connected to the Trim pin and Vi–. The table below indi-
cates typical
U
o versus
U
ext values under nominal condi-
tions (
U
i nom,
I
o = 0.5
I
o nom), with either paralleled outputs
or equal load conditions on each output. Applying a con-
trol voltage >20 V will set the converter into a hiccup
mode. Direct paralleling of the Trim pins of units con-
nected in parallel is feasible.
Table 7: U
o
versus U
ext
for U
o
= 75...105% U
o nom
;
typical values (U
i nom
, I
o1/2
= 0.5 I
o1/2 nom
)
U
o [%
U
o nom]
U
ext [V]
≥105 0
102 1.6
95 4.5
85 9
75 13
Auxiliary Functions
Shut Down Function
The outputs of the converters may be enabled or disabled
by means of a logic signal (TTL, CMOS, etc.) applied to the
shut down pin. If the shut down function is not required then
it should be left open-circuit.
Converter operating: 2.0...20 V
Converter shut down: –10...0.7 V
Adjustable Output Voltage
– R input for single output units and -0503- types
– Trim input for double output units
As a standard feature, the IMS 15 single and double output
units offer adjustable output voltage(s) by using the control
input R or Trim. If the control input is left open-circuit the out-
put voltage is set to
U
o nom. For output voltages
U
o >
U
o nom,
the minimum input voltage
U
i min (see:
Electrical Input Data
)
increases proportionally to
U
o/
U
o nom.
Single output units and -0503- types:
The R input is referenced to the secondary side of the con-
verter. Adjustment of the output voltage is possible by
means of either an external resistor or a voltage source.
a) Adjustment by means of an external resistor
R
ext:
Depending upon the value of the required output voltage,
the resistor shall be connected
either: Between the R pin and Vo– to achieve an output
voltage adjustment range of approximately
U
o = 80...100%
U
o nom.
U
o
R
ext1 ≈ 4 kΩ • –––––––––
U
o nom –
U
o
or: Between the R pin and Vo+ to achieve an output volt-
age range of approximately
U
o = 100...105%
U
o nom.
(
U
o – 2.5V)
R
ext2 ≈ 4 kΩ • ––––––––––––––––––
2.5 V • (
U
o/
U
o nom – 1)
b) Adjustment by means of an external voltage
U
ext be-
tween Vo– and R pins.
The control voltage range is 1.96...2.62 V and allows for
an adjustment in the range of approximately 80...105%
of
U
o nom.
U
o • 2.5 V
U
ext ≈–––––––––
U
o nom
Attempting to adjust the output below this range will
cause the converter to shut down (hiccup mode).
Note: Applying an external control voltage >2.75 V may
damage the converter.
Double output units (except -0503- types):
The Trim input is referenced to the primary side. The figure
below shows the circuit topology. Adjustment of the output
voltage is possible by means of either an external resistor
R
ext in the range of 100...105% of
U
o nom or an external volt-
age source in the range of 75...105% of
U
o nom.
Trim
Vo1+
Vo2–
+
Uext
–
Vi+
Vi–
Rext
Vo1–
Vo2+
06089
Control
circuit
U
ref
2.5 V
Fig. 15
Output voltage control for double output units by means of
the Trim input.
R
Vo+
Vo—
+
U
ext
—
4 kΩUref 2.5 V
control
circuit
L
N
R
ext1
R
ext2
06029
Fig. 14
Output voltage control for single output units and -05-03-
types by means of the R input.
Table 6: R
ext1
for U
o
> U
o nom
;
approximate values (U
i nom
, I
o1, 2
= 0.5 I
o1/2 nom
)
U
o [%
U
o nom]
R
ext [kΩ]
105...108 (107 typically) 0
105 1.5
104 5.6
103 12
102 27
101 68
100 ∞
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 9/14
Electromagnetic Immunity
Table 8: Immunity type tests
Phenomenon Standard 1 Class Coupling Value Waveform Source Test In Per- 3
Level mode 2 applied Imped. procedure oper. form.
Electrostatic IEC/EN 2 contact discharge 4000 Vp1/50 ns 330 Ω10 positive and yes B
discharge 61000-4-2 (R pin open) 10 negative
to case 3 air discharge 8000 Vpdischarges
(R pin open)
Electromagnetic IEC/EN 2 antenna 3 V/m AM 80% 26…1000 MHz yes A
field 61000-4-3 1 kHz
ENV 50204 PM, 50% duty 900 MHz
cycle, 200 Hz
resp. frequ.
Electrical fast IEC/EN 3 direct +i/–i 2000 Vpbursts of 5/50 ns 50 Ω1 min positive yes A
transient/burst 61000-4-4 5 kHz rep. rate 1 min negative
transients with transients per
15 ms burst coupling mode
duration and a
300 ms period
Surge IEC/EN 2 +i/–i 1000 Vp1.2/50 µs2 Ω5 pos. and 5 neg. yes B
61000-4-5 5 impulses per
coupling mode
Conducted IEC/EN 2 +i/–i3 V
rms AM modulated 50 Ω0.15...80 MHz yes A
disturbancies 61000-4-6 (130 dBµV) 80%, 1 kHz 150 Ω
Transient ETR 283 +i/–i 150 Vp0.1/0.3 ms limited to 3 positive yes B
(19 Pfl 1) 4 <100 A
1Related and previous standards are referenced in
Technical Information: Standards
.
2i = input, o = output.
3A = normal operation, no deviation from specification, B = temporary deviation from specs. possibe.
4For 48 IMS 15 types (additional external components required). Not applicable for 24 IMS 15 types.
5External components required.
which typically occur in many installations, but especially in
battery driven mobile applications.
Electromagnetic Compatibility (EMC)
A suppressor diode together with an input filter form an ef-
fective protection against high input transient voltages
Fig. 16
Typical disturbance voltage (quasi-peak) at the input ac-
cording to CISPR 11/EN 55011 and CISPR 22/EN 55022,
measured at U
i nom
and I
o nom
. Output leads 0.1 m, twisted.
(48 IMS 15-05)
Electromagnetic Emission
07020
EN 55022 A
EN 55022 B
90
80
70
60
50
40
30
20
10
0
0
.01
0
.05
0.1
0.5
1
2
5
10
20
30
[dBµV]
MHz
0
.02
50
40
30
20
10
0
30
50
100
200
500
1000
[dBµV/m]
[MHz]
A
B
07108
Fig. 17
Typical radio frequency-interference voltage at U
i nom
,
I
o nom
, measured with an antenna (distance 10 m).
Output leads 1 m, twisted.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 10/14
Immunity to Environmental Conditions
Table 10: Mechanical stress
Test method Standard Test conditions Status
Ca Damp heat IEC/DIN IEC 60068-2-3 Temperature: 40 ±2 °C Unit not
steady state MIL-STD-810D section 507.2 Relative humidity: 93 +2/-3 % operating
Duration: 56 days
Ea Shock IEC/EN/DIN EN 60068-2-27 Acceleration amplitude: 50 gn = 490 m/s2Unit
(half-sinusoidal) MIL-STD-810D section 516.3 Bump duration: 11 ms operating
Number of bumps: 18 (3 each direction)
Eb Bump IEC/EN/DIN EN 60068-2-29 Acceleration amplitude: 25 gn = 245 m/s2Unit
(half-sinusoidal) MIL-STD-810D section 516.3 Bump duration: 11 ms operating
Number of bumps: 6000 (1000 each direction)
Fc Vibration IEC/EN/DIN EN 60068-2-6 Acceleration amplitude: 0.35 mm (10...60 Hz) Unit
(sinusoidal) MIL-STD-810D section 514.3 5 gn = 49 m/s2 (60...2000 Hz) operating
Frequency (1 Oct/min): 10...2000 Hz
Test duration: 7.5 h (2.5 h each axis)
Kb Salt mist, cyclic IEC/EN/DIN IEC 60068-2-52 Concentration: 5% (30°C) Unit not
(sodium chloride Duration: 2 h per cycle operating
NaCl solution) Storage: 40°C, 93% rel. humidity
Storage duration: 22 h per cycle
Number of cycles: 3
Table 11: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar)
Temperature Standard -9
Characteristics Conditions min max Unit
T
AAmbient temperature 1 Operational –40 71 °C
T
CCase temperature –40 95
T
SStorage temperature 1 Non operational –55 100
1MIL-STD-810D section 501.2 and 502.2
CISPR 22/EN 55022, Level B Radiated
Electromagnetic emission requirements according to
EN 55022, class B (radiated emmission) can be achieved
by adding an external common mode choke. The filter com-
ponent should be placed as close as possible to the input of
the converter.
Fig. 19
Choke dimensions (Tokin SC-02-10 GS)
Vi+
Vi–
L
V+
V–
Module
07115
Fig. 18
Example for external circuitry to comply with CISPR22/EN
55022, level B, radiated
15 8.5
15
07110
Table 9: Input filter components for EN 55022, level B,
radiated.
Type Current compensated choke
24 IMS 15 1 mH, 2A
48 IMS 15 e.g. Tokin SC-02-10GS
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 11/14
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise indicated.
European
Projection
50.8 (2")
40.65 (1.6")
10.5 (0.41")
0.8 (0.03")
45.72 (1.8")
S09011
1
4
11
17
47 (1.85")
36.83 (1.45")
2.54 (0.1")
Fixing hole for
M2 or KA 22
self tapping screws
5.08 (0.2")
Measuring point of case temperature
T
C
2
3
12
13
15
bottom view
Fig. 20
Case IMS 15
Weight: <35 g
Fig. 21
C pinout (option C)
Weight: <24 g
50.8 (2")
40.65 (1.6")
11.2
(0.44") 45.72 (1.8")
S90010
1
5
5.08 (0.2")
20.3 (0.8")
Measuring point of case temperature
T
C
2
3
4
0.5 (0.02")
45.72 (1.8")
bottom view
ø 1.0 (0.04")
1.0 (0.04")
50.8 (2")
40.65 (1.6")
11.5 (0.45") 54.57 (2.15")
S90012
11
15
5 x 5.08 (0.2")
12
13
16
17
1
4
2
3
6
5
14
6 x 5.08 (0.2")
bottom view
Fig. 22
Surface mount version with PCB lid (option L)
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 12/14
Fig. 23
Open frame (option Z)
Weight: <20 g
12
48.26 (1.9")
10.5 (0.41") 45.72 (1.8")
S90011
1
4
11
17
38.8 (1.52")
3 x 5.08 (0.2")
6 x 5.08 (0.2")
2
3
12
13
15
0.8 (0.03")
bottom view
ø 2.54 (0.1")
Safety and Installation Instructions
Installation Instruction
Installation of the DC-DC converters must strictly follow the
national safety regulations in compliance with the enclo-
sure, mounting, creepage, clearance, casualty, markings
and segregation requirements of the end-use application.
Connection to the system shall be made via a printed circuit
board with hole diameters of 1.4 mm ±0.1 mm for the pins.
The units should be connected to a secondary circuit.
Check for hazardous voltages before altering any connec-
tions.
Do not open the module.
Ensure that a unit failure (e.g. by an internal short-circuit)
does not result in a hazardous conditions. See also:
Safety
of operator accessible output circuit.
Input Fuse
To prevent excessive current flowing through the input sup-
ply line in case of a short-circuit across the converter input
an external fuse should be installed in a non earthed input
supply line. We recommend a fast acting fuse F3.15A for
24 IMS 15 types and F2A for 48 IMS 15 types.
Standards and approvals
All DC-DC converters are pending to be UL recognized
according to UL 1950, UL recognized for Canada to CAN/
CSA C22.2 No. 950-95 and LGA approved to IEC/EN
60950 standards.
The units have been evaluated for:
•Building in
•Supplementary insulation input to output, based on their
maximum input voltage
•The use in a pollution degree 2 environment
•Connecting the input to a secondary circuit which is sub-
ject to a maximum transient rating of 1500 V
After approvals the DC-DC converters are subject to manu-
facturing surveillance in accordance with the above men-
tioned UL, CSA, EN and ISO 9001 standards.
Table 12: Pin allocation
Pin Standard Option K Option C Option L
single double -0503- dual single dual single double
1 Vi+ Vi+ Vi+ Vi+ Vi+ Vi+ Vi+ Vi+
2Vi–Vi–Vi–Vi–Vi–Vi–Vi–Vi–
3 - Trim n.c. - Vo+ Vo+ n.c. Trim
4 SD SD SD SD - Go SD SD
5- - - - Vo–Vo–n.c. n.c.
6 - - - - - - n.c. n.c.
11 - Vo1+ Vo2+ Vo+ - - - Vo1
12 - Vo1–Go - - - - Vo1–
13 Vo+ Vo2+ Vo1+ Go - - Vo+ Vo2+
15 Vo–Vo2–Go Vo–--Vo–Vo2–
17 R n.c. R n.c. - - R n.c.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 13/14
Protection Degree
The protection degree of the DC-DC converters is IP 40
(except option Z).
Cleaning Agents
In order to avoid possible damage, any penetration of
cleaning fluids should be prevented, since the power sup-
plies are not hermetically sealed.
10005
1
2
3
4
11
12
13
15
17
Bottom view
Fig. 24
Pin allocation
Table 14: Insulation concept leading to an SELV output circuit
Conditions Front end DC-DC converter Result
Supply Minimum required grade Maximum Minimum required safety Measures to achieve the Safety status of
voltage of isolation, to be provided DC output status of the front end specified safety status of the the DC-DC
by the AC-DC front end, voltage output circuit output circuit converter output
including mains supplied from the circuit
battery charger front end 1
Mains Basic ≤60 V Earthed SELV circuit 2 Operational insulation (pro- SELV circuit
≤250 V AC vided by the DC-DC converter)
ELV circuit Input fuse 3 output suppressor Earthed SELV
>60 V Hazardous voltage diode(s) 4, and earthed circuit
secondary circuit output circuit(s) 2
Double or reinforced ≤60 V SELV circuit Operational insulation (pro- SELV circuit
vided by the DC-DC converter)
>60 V TNV-2 circuit Supplementary insulation,
Double or reinforced insu- based on the maximum input
lated unearthed hazardous voltage (provided by the
voltage secondary circuit 5 DC-DC converter)
1The front end output voltage should match the specified input voltage range of the DC-DC converter.
2The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
3The installer shall provide an approved fuse (type with the lowest rating suitable for the application) in a non-earthed input line directly
at the input of the DC-DC converter (see fig.:
Schematic safety concept
). For UL’s purpose, the fuse needs to be UL-listed. See also:
Input Fuse
.
4Each suppressor diode should be dimensioned in such a way, that in the case of an insulation fault the diode is able to limit the output
voltage to SELV (<60 V) until the input fuse blows (see fig.:
Schematic safety concept
).
5Has to be insulated from earth by basic insulation according to the relevant safety standard, based on the maximum output voltage
from the front end.
Isolation
The electric strength test is performed as factory test in ac-
cordance with IEC/EN 60950 and UL 1950 and should not
be repeated in the field. Power-One will not honour any
guarantee claims resulting from electric strength field tests.
Table 13: Electric strength test voltages
Characteristic Input to Output to Unit
output output
Electric strength 1.1 0.1 kVrms
test voltage 1 s 1.5 0.15 kV DC
Coupling capacitance ≈2.2 - nF
Insulation resistance >100 - MΩ
at 500 V DC
Partial discharge Consult - kV
extinction voltage factory
Safety of Operator Accessible Output Circuit
If the output circuit of a DC-DC converter is operator acces-
sible, it shall be an SELV circuit according to IEC/EN 60950
related safety standards
The following table shows some possible installation con-
figurations, compliance with which causes the output circuit
of the DC-DC converter to be an SELV circuit according to
IEC/EN 60950 up to a configured output voltage of 42 V.
However, it is the sole responsibility of the installer to en-
sure the compliance with the relevant and applicable safety
regulations. More information is given in:
Technical Infor-
mation:
Safety
.
Board Mountable DC-DC Converters IMS 15 Series
Edition 1/04.2001 14/14
Option K
Option K configures the electrically isolated double outputs
to the alternative pinout with outputs connected in series
(Vo+/Go/Vo–) and common ground.
However instead of using units with option K, it is recom-
mended to use the standard double output units by provid-
ing the printed circuit board with an additional pin hole (for
pin 12 of double output units) connected to pin hole 13. This
will provide more design-in flexibility since by that both
pinouts may be used on the same PCB.
See also fig.
Block diagram, double output units, standard
pinout
.
Option i Inhibit
Excludes shut down and option K, or C.
The output(s) of the converter may be enabled or disabled
by means of a logic signal (TTL, CMOS, etc.) applied to the
inhibit pin. No output voltage overshoot will occur when the
unit is turned on. If the inhibit function is not required the
inhibit pin should be connected to Vi– to enable the output
(active low logic, fail safe).
Converter operating: –10 V...0.8 V
Converter inhibited
or inhibit pin left open: 2.4 V...
U
i max (max. 75 V)
Fig. 26
If the inhibit is not used the inhibit pin should be con-
nected to Vi–.
Vi+
Vi–
i
06070
Description of Options
Table 15: Survey of options
Option Function Characteristic
K Alternative pinout See mechanical Data
i Inhibit See mechanical Data
L SMD version with PCB lid See mechanical Data
Z Open frame version See mechanical Data
C C-pinout See mechanical Data
AC-DC
front
end
DC-DC
con-
verter
Mains
Fuse
Battery
Earth
connection
Suppressor
diode SELV
Earth
connection
+
–
~
~
10004
Fig. 25
Schematic safety concept. Use fuse, suppressor diode
and earth connection as per table:
Safety concept leading
to an SELV output circuit
.
