48IMS7-15-15-7M [BEL]
DC-DC Regulated Power Supply Module, 2 Output, 7W, Hybrid;
| 型号： | 48IMS7-15-15-7M |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 2 Output, 7W, Hybrid |
| 文件： | 总15页 (文件大小：320K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
7 Watt DC-DC Converters
IMS 7 Series
Input to output electric strength test 1500 V DC
Input voltage ranges: 14...36 V DC and 36...75 V DC
Single and double outputs of 3.3, 5, 12, 15, 24 V DC
• Wide input voltage ranges
• Electrical isolation, single and double output units
• High efficiency (typ. 84%)
• Emissions below EN 55 022 level B
• Immunity to IEC/EN 61000-4-2, -3, -4, -5 and -6
• Inhibit input, output voltage adjustable
• Flex power: Flexible load distribution
• No load and short-circuit proof
10.5
0.42"
25.4
1.0"
50.8
2.0"
• Operating ambient temperature range –25...71°C
• High reliability and no derating
• 2" × 1" case with 10.5 mm profile
• Supplementary insulation
Safety according to IECEN 60950, UL 1950
LGA
C
Summary
The IMS 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 particu-
larly suitable for use in industry or telecommunications
where variable input voltages or high transient voltages are
prevalent.
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 and are LGA and UL marked.
A special feature is their small case size, 2" × 1" with
10.5 mm profile.
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
repeatability in the control loop over all operating condi-
tions. Careful considerations of possible thermal stresses
ensure the absence of hot spots providing long life in envi-
ronments where temperature cycles are a reality. The ther-
mal design allows operation at full load up to an ambient
temperature of 71°C in free air without using any potting
material. For extremely high vibration environments the
case has holes for screw mounting.
Providing two wide input voltage ranges, 14...36 V DC and
36...75 V DC, the units are available with single and electri-
cally isolated double outputs allowing the configuration of
output voltages from 3.3 up to 48 V DC externally adjust-
able, with flexible load distribution on double output units.
An inhibit input allows remote converter 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 systems
where the bus voltage may exceed the SELV limit of
Optionally the IMS 7 series is available with the industrial
C pinout or with an SMD pinout.
Table of Contents
Page
Page
Summary.......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 2
Functional Description...................................................... 3
Electrical Input Data ......................................................... 4
Electrical Output Data ...................................................... 6
Auxiliary Functions ........................................................... 8
Electromagnetic Compatibility (EMC) ............................ 10
Immunity to Environmental Conditions........................... 11
Mechanical Data ............................................................ 12
Safety and Installation Instructions ................................ 13
Description of Options.................................................... 15
Accessories .................................................................... 15
Edition 5/9.99
1/15
MELCHER
The Power Partners.
IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
Type Survey and Key Data
Table 1: Type survey
Output 1
Output 2
Output
power
Po nom [W]
Input Voltage Range and Efficiency
Options
1
1
2
Uo nom
Io nom
[A]
Uo nom
Io nom
[A]
Ui min...Ui max
htyp
Ui min...Ui max
htyp
[%]
[V DC]
[V DC]
14...36 V DC
[%]
36...75 V DC
3.3
5.1
1.5
1.2
-
-
-
-
5
6.1
24 IMS 7-03-7
24 IMS 7-05-7
79
81
48 IMS 7-03-7
48 IMS 7-05-7
79
82
-9, M, C
-9, M, C
5
0.7
0.3
0.24
0.15
5
0.7
0.3
0.24
0.15
7
24 IMS 7-05-05-7
24 IMS 7-12-12-7
24 IMS 7-15-15-7
24 IMS 7-24-24-7
83
84
84
84
48 IMS 7-05-05-7
48 IMS 7-12-12-7
48 IMS 7-15-15-7
48 IMS 7-24-24-7
83
84
84
84
-9, M, C
-9, M, C
-9, M, C
-9, M
12
15
24
12
15
24
7.2
7.2
7.2
1 Flexible load distribution on double outputs possible.
2 See: Description of Options
Type Key
24 IMS 7 - 05 - 05 -7 M C
Input voltage range Ui
14...36 V DC .............................................. 24
36...75 V DC .............................................. 48
Series ........................................................................IMS 7
Output voltage type for output 1 ............. 03, 05, 12, 15, 24
Dash: Designates double output unit with two indepen-
dent galvanically isolated outputs ................. -
1
Output voltage type for output 2 ................... 05, 12, 15, 24
Operating ambient temperature range TA
–25...71°C .................................................. -7
–40...71°C (standard) ................................. -9
2
Options:
SMD version ............................................... M
C-pinout ................................................ C, C2
2 3
1 Not applicable for option C.
2 C-pinout excludes option M and vice versa.
3 Configures the 2 outputs either to ± connection or to one strong single output.
For delivery lead times contact factory. Some types require a minimum order quantity.
Examples: 48 IMS 7-05-05-7M: DC-DC converter, input voltage range 36...75 V, 2 galvanically isolated outputs each pro-
viding 5 V, 700 mA, surface mount version.
24 IMS 7-0505-7C: DC-DC converter, input voltage range 14...36 V, C-pinout with outputs ±5 V, 700 mA.
24 IMS 7-15-7C2: DC-DC converter, input voltage range 14...36 V, C-pinout with one output 15 V, 480 mA.
Edition 5/9.99
MELCHER
2/15
The Power Partners.
Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
Functional Description
The IMS 7 DC-DC modules are feedback controlled flyback
converters using current mode PWM (Pulse Width Modula-
tion).
In the case of the 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-input is referenced to the primary side and allows pro-
gramming of the output voltage in the range 100 to 105% of
Uo nom by an external resistor or within 75 to 105% of Uo nom
using an external voltage source.
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 Uo nom using either an external resistor
or an external voltage source.
Current limitation is provided by the primary circuit, thus
limiting the total output current (Io nom for the single and
Io1 nom + Io2 nom for the double output types).
The inhibit input allows remote converter shutdown.
03026
03025
1
3
11
Vi+
Vo+
1
11
Vi+
Vo1
PWM
(Trim)
R
4
3
i
10
13
Vo1
Vo2
10
12
PWM
10 nF
Vo–
i
2 × 2200 pF
1500 V
2
4
Vi–
2
12
Vi–
Vo2
13
14
R
14 n.c.
n.c.
n.c.
2 × 2200 pF, 1500 V
Fig. 1
Block diagram, single output types, standard pinout
Fig. 2
Block diagram, double output types, standard pinout
03040
03039
1
3
Vi+
Vo+
1
Vi+
3
Vo+
Go
PWM
10
5
Vo–
PWM
10 nF
2 × 2200 pF
1500 V
2
Vi–
2
5
Vi–
Vo –
2 × 2200 pF, 1500 V
Fig. 3
Fig. 4
Block diagram, single output types, C pinout
Block diagram, dual output types, C pinout
Edition 5/9.99
3/15
MELCHER
The Power Partners.
IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
Electrical Input Data
General conditions:
– TA = 25°C, unless TC is specified.
– Connector pins i and Vi– interconnected.
– R input not connected.
Table 2: Input Data
Input
24 IMS
48 IMS
Characteristics
Conditions
min
14
typ
max
36
min
36
typ
max
75
Unit
Ui
Input voltage range 1
TA min...TAmax
Io = 0...Io nom
V DC
Ui nom
Ui sur
Input voltage (nominal)
24
48
Repetitive surge
voltage
Abs. max input (3 s)
50
100
tstart up
Converter 2
start-up time
switch on
inh. release
Worst case condition at
Ui min and full load
0.25
0.5
0.1
0.25
0.5
0.1
s
trise
Rise time 2
Ui nom, Io = Io nom
resistive load
5
12
5
ms
capacitive load
Io = 0, Ui min...Ui max
for surge calculation
Converter operating
Converter inhibited
Converter operating
Converter inhibited
Ui min...Ui max
12
6
Iio
No load input current
Input capacitance
Inhibit voltage
12
24
12
mA
µF
Ci
Uih
0.8
0.5
–10...0.8
–10 ...0.8
V DC
open, 2.4...Ui max
open, 2.4...Ui max
Iih
Inhibit current
–0.5
–0.5
mA
1
1
Ii ih
Input current
3.0
3.0
if unit inhibited
Iinr p
fs
Peak inrush current 4
Switching frequency
Reflected ripple current
Ui = Ui nom
4.0
3.9
A
Ui min...Ui max, Io = 0...Io nom
Io = 0...Io nom
approx. 330
approx. 330
kHz
mApp
Ii rr
40
30
Ui RFI
Input RFI level
EN 55022 3
B
B
conducted and radiated
1 Ui min will not be as stated if Uo is increased above Uo nom by use of the R input pin. If the output voltage is set to a higher value, Ui min
will be proportionally increased.
2 Measured with a resistive or max. admissible capacitive load. (See fig.: Converter start-up and rise time).
3 Measured with a lead lenght of 0.1 m, leads twisted. Double output units with both outputs in parallel.
4 Source impedance according to prETS 300132-2, version 4.3.
5 The level of the switching frequency band varies with the output voltage configuration. (See also fig.: Switching frequency versus
input voltage and load.)
04008
Uo
trise
Uo nom
t
tstart up
Fig. 5
Converter start-up and rise time
Edition 5/9.99
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4/15
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Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
Input Transient Voltage Protection
Reverse Polarity Protection at Input
In many applications transient voltages on the input of the
converter are always possible. These may be caused for ex-
ample be short circuits between Vi+ and Vi– where the net-
work inductance may cause high energy pulses.
The suppressor diode on the input also provides for reverse
polarity protection by conducting current in the reverse di-
rection, thus protecting the unit. An external fuse is required
to limit this current:
– For 24 IMS 7 a fast 2 A (F2A) fuse is recommended.
– For 48 IMS 7 a fast 1 A (F1A) fuse is recommended.
In order to protect the converter a large transient voltage
supressor has been fitted to the input of the IMS 7 types.
Specifications as per table below.
Inrush Current
Table 3: Built-in transient voltage suppressor
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.
Type
Breakdown
Voltage
Peak Power
at 1 ms
PP
Peak Pulse
Current
IPP
VBR nom
1 A/Div.
4
24 IMS 7
48 IMS 7
53 V
600 W
600 W
7.7 A
4.1 A
04030
100 V
3
2
If transients generating currents above the peak pulse cur-
rent Ipp are possible then an external limiting network such
as the circuit recommended for IEC 801-5, level 2 compli-
ance is necessary.
1
0
To achieve IEC/EN 61000-4-5, level 2 compliance an addi-
tional inductor and capacitor should be provided externally
as shown in the figure below. The components should have
similar characteristics as listed in table 9.
10 µs/Div.
To withstand the 150 V transient according to 19 Pfl 1, appli-
cable for 48 IMS 7 types, the same external circuitry with
similar components as for IEC/EN 61000-4-5, level 2 com-
pliance can be used.
Fig. 8
Typical inrush current at Ui nom, Po nom versus time
(48 IMS 7) measured according to prETS 300132-2 (Ver-
sion 4.3)
04043
L
V+
Vi+
i
+
Module
C
V–
Vi–
Fig. 6
Example for external circuitry to comply with
IEC/EN 61000-4-5, level 2.
Table 4: Components for external circuitry to comply with
IEC 801-5
Circuit Ref.
24 IMS 7
48 IMS 7
L
330 µH, 0.42 Ω, 0.6 A
330 µH, 0.42 Ω, 0.6 A
TDK TSL1110-331KR55 TDK TSL1110-331KR55
C
68 µ, 63 V, 85°C
68 µF, 100 V, 85°C
04029
10.5
5
0.7
Fig. 7
Dimensions for inductor L
Edition 5/9.99
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IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
Electrical Output Data
General conditions:
– TA = 25°C, unless TC is specified.
– Connector pins i (inhibit) and Vi– interconnected.
– R input not connected.
Table 5a: Output data for single output units
Output
Uo nom
3.3 V
5.1 V
Characteristics
Uo1 Output voltage
Io nom Output current
Conditions
Ui nom
min typ max
min typ max
Unit
VDC
A
3.26
3.34
5.05
5.15
Ui min...Ui max
1.5
1.2
Io L
Current limit 2
Ui nom, TC = 25°C
3.0
2.4
DUo U Line and load regulation
Ui min...Ui max
Io = (0.05...1) Io nom
±1
±1
%
5
uo1
Output voltage noise
Ui min...Ui max
70
70
mVpp
Io = Io nom
6
20 40
130
20 40
130
Uo clp Output overvoltage
limitation 7
115
115
%
Co ext Admissible
capacitive load
≤2500
≤2000
µF
uo d Dynamic Voltage deviat. Ui nom
±250
±250
mV
ms
1
load
Io nom ↔ / Io nom
2
td
Recovery time
1
1
regulat.
aUo Temperature coefficitent
DUo/D TC (TC min...TC max
Ui min...Ui max
Io = 0...Io max
±0.02
±0.02
%/K
)
Table 5b: Output data for double output units
Output
Uo nom
2 × 5 V
2 × 12 V
2 × 15 V
min typ max
2 × 24 V
Characteristics
Conditions
min typ max
min typ max
min typ max
Unit
Uo1 Output voltage
Uo2
Ui nom
Io = 0.5 Io nom
4.92
4.92
5.08 11.82
5.08 11.82
12.18 14.78
12.18 14.78
15.22 23.64
15.22 23.64
24.36 VDC
24.36
Io nom Output current 1
Ui min...Ui max
2 × 0.7
2 × 0.3
2 × 0.24
2 × 0.15
A
Io L
Current limit 2, 3
Ui nom, TC = 25°C
2.8
1.2
1.1
0.6
DUo U Line regulation
Ui min...Ui max
Io nom
±1
±1
±1
±1
%
DUo l Load regulation 4
uo1, 2 Output voltage noise
Ui nom
Io = (0,1...1) Io nom
±3
±3
±3
±3
5
Ui min...Ui max
Io = Io nom
80
20 40
130
120
150
30 60
130
240 mVpp
50 100
130
6
25 50
130
Uo clp Output overvoltage
limitation 7
Minimum load 1% 115
115
115
115
%
Co ext Admissible
capacitive load 3
≤2000
≤300
≤200
≤100
µF
uo d Dynamic Voltage deviat. Ui nom
±150
±330
±350
±600
mV
ms
load
I
o nom ↔ 1/
Io nom
2
td
Recovery time
1
1
1
1
regulat.
aUo Temperature coefficitent
DUo/DTC (TC min...TC max
Ui min...Ui max
Io = 0...Io max
±0.02
±0.02
±0.02
±0.02
%/K
)
1 Each output is capable of delivering the full output power, Po nom according to table Type survey.
2 The current limit is primary side controlled.
3 Measured with both outputs connected in parallel.
4 Conditions for specified output. Other output loaded with constant current Io = 0.5 Io nom
5 BW = 20 MHz
6 Measured with a probe according to EN 61204.
7 The overvoltage protection is not tracking with the R control.
.
Edition 5/9.99
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Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
Short Circuit Behaviour
Connection in Series or in Parallel
Connection in series:
The outputs of single or double output units can be con-
nected in series without any precautions, taking into consid-
eration that the highest output voltage should remain below
60 V for SELV operation.
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).
Thermal Considerations
Connection in parallel:
If a converter, mounted on a PCB, is located in free, quasi-
stationary air (convection cooling) at the indicated maxi-
mum ambient temperature TA max (see table: Temperature
specifications) and is operated at its nominal input voltage
and output power, the case temperature TC measured at the
Measuring point of case temperature TC (see: Mechanical
Data) will approach the indicated value TC max after the
warm-up phase. However, the relationship between TA and
TC 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. TA max is therefore only an indica-
tive value and under practical operating conditions, the am-
bient temperature TA may be higher or lower than this value.
The outputs of one or several double output units with equal
nominal voltage can be connected in parallel. Approximate
current sharing between 2 or several units is ensured by
their load dependent output characteristic.
Output Overvoltage Protection
The outputs of single output units and -05-05- types are
protected against overvoltages by a second control loop. In
the event of an overvoltage on the output the unit will shut-
down and attempt to restart approximately every 0.4 sec-
onds. Double output units (with exception of the -05-05-
types) are protected against overvoltages by a Zener diode
accross the second output. Under worst case conditions the
Zener diode will short circuit. Since with double output units
both outputs track each other the protection diode is only
provided 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 do withstand
externally applied overvoltages.
Caution: The case temperature TC measured at the
Measuring point of case temperature TC (see: Mechani-
cal Data) may under no circumstances exceed the speci-
fied maximum value. The installer must ensure that un-
der all operating conditions TC remains within the limits
stated in the table: Temperature specifications.
Typical Performance Curves
Uo [V]
Uo [V]
05087
05086
13
5.5
12
11
10
9
5.0
4.5
4.0
3.5
3.0
8
7
Io total [A]
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
0
0
0.2
0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Io [A]
0.4
Fig. 9
Fig. 10
Uo versus Io (typ) of single output units with Uo = 5.1 V.
Uo versus Io (typ) of double output units, with both outputs
in parallel.
Uo1 [V]
Uo1, Uo2 [V]
05088
13.5
05039
14
13
13.0
12.5
Io2 = 0.03 A
Io2 = 0.3 A
12
11
10
Uo2
Uo1
12.0
11.5
11.0
Io1
Io1 nom
[%]
50
75
100
125
150
0.03
0.10
0.15
0.25
0.35 Io1 [A]
0
25
0.05
0.20
Fig. 11
o1 versus Io1 (typ) for various Io2 (2 × 12 V).
Fig. 12
U
Flexible load distribution on double outputs (2 × 12 V) with
The cross load effect is negligible.
load variation from 0...150% of Po1 nom on output 1. Output
2 loaded with 25% of Po2 nom
.
Edition 5/9.99
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IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
h [%]
05041
05052
Uo [%]
90
overload short circuit condition
switch-off
Ui nom
Ui max
Ui min
100
70
80
70
60
50
40
8.5
t [ms]
60.5
60.5
Po
Po nom
[%]
50
100
25
75
Fig. 13
Fig. 14
Overload switch-off (hiccup mode). Typical values.
Frequency of pulses: 16.5 Hz, puls duration: 8.5 ms
Efficiency versus input voltage and load. Typical values
(48 IMS 7-12-12-7).
Auxiliary Functions
Inhibit Function
Adjustable Output Voltage (R input)
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).
As a standard feature, the IMS 7 single and double output
units offer adjustable output voltage(s) by using the control
input R pin. If the R pin is left open circuit the output voltage
is set to Uo nom. The output voltage is adjustable in the range
75...105% of Uo nom.The circuit works for single and double
output units in a different way. For output voltages Uo >
Uo nom, the minimum input voltage Ui min (see: Electrical In-
Converter operating:
Converter inhibited
or inhibit pin left open:
–10 V...0.8 V
put Data) increases proportionally to Uo/Uo nom
.
2.4 V...Ui max
Single output units:
06070
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.
Vi+
a) Adjustment by means of an external resistor Rext1
:
i
Depending upon the value of the required output voltage,
the resistor shall be connected
Vi–
either: Between the R pin and Vo– to achieve an output
voltage adjustment range of approximately
Uo = 75...100% Uo nom. (85...100% for 3.3 V outputs)
Fig. 15
If the inhibit is not used the inhibit pin should be connected
to Vi–
Uo
R
ext1 ≈ 4 kΩ • –––––––––
Uo nom – Uo
or: Between the R pin and Vo+ to achieve an output volt-
age range of approximately Uo = 100...105% Uo nom
.
(Uo – 2.5 V)
2.5 V • (Uo/Uo nom – 1)
R
ext2 ≈ 4 kΩ • –––––––––––––––––––
Edition 5/9.99
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Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
a) Adjustment by means of an external resistor.
b) Adjustment by means of an external voltage Uext be-
tween Vo– and R pins.
Programming of the output voltage by means of an exter-
nal resistor Rext1 is possible within a limited range of
100...105% of Uo nom. Rext1 should be connected between
the R-pin and Vi–. Connection of Rext1 to Vi+ may dam-
age the converter. The following table indicates suitable
resistor values for typical output voltages under nominal
conditions (Ui nom, Io = 0.5 Io nom), with either paralleled
outputs or equal load conditions on each output.
The control voltage range is 1.87...2.62 V and allows for
an adjustment in the range of approximately 75...105%.
(85...105% for 3.3 V outputs)
Uo • 2.5 V
Uo nom
U
ext ≈ –––––––––
Attempting to adjust the output below this range will
cause the converter to shutdown (hiccup mode).
Table 6: Rext1 for Uo > Uo nom
approximate values (Ui nom, Io1, 2 = 0.5 Io1/2 nom
;
Note: Applying an external control voltage >2.75 V may
damage the converter.
)
Uo [% Uo nom
]
R
ext [kΩ]
06029
105...108 (107 typically)
0
Vi+
Vo+
R
105
104
103
102
101
100
1.5
5.6
12
27
68
∞
Rext2
Uref 2.5 V
4 kΩ
+
control
circuit
Uext
Rext1
–
b) Adjustment by means of an external voltage source Uext
.
Vo–
Vi–
For external output voltage programming in the range
75...105% of Uo nom a (0...20 V) source Uext is required,
connected to the R-pin and Vi–.The table below indicates
typical Uo versus Uext values under nominal conditions
(Ui nom, Io = 0.5 Io nom), with either paralleled outputs or
equal load conditions on each output. Applying a control
voltage >20 V will set the converter into a hiccup mode.
Direct paralleling of the R-pins of units connected in par-
allel is feasible.
Fig. 16
Output voltage control for single output units by means of
the R-input
Double output units:
The R input (Trim) is referenced to the primary side. The fig-
ure below shows the circuit topology. Adjustment of the out-
put voltage is possible by means of either an external resis-
tor in the range of 100...105% of Uo nom, or an external volt-
Table 7: Uext for Uo = 75...105% Uo nom
;
typical values (Ui nom, Io1, 2 = 0.5 Io1/2 nom
)
age source in the range of 75...105% of Uo nom
.
Uo [% Uo nom
]
Uext [V]
06132
≥105
102
95
85
75
0
Vi+
Vo1+
Vo1–
Vo2+
1.6
4.5
9
R (Trim)
+
13
Control
circuit
Uext
Rext
Vi–
–
Vo2–
Fig. 17
Output voltage control for double output units by means of
the R input
Edition 5/9.99
9/15
MELCHER
The Power Partners.
IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
Electromagnetic Compatibility (EMC)
which typically occur in many installations, but especially in
battery driven mobile applications.
A suppressor diode together with an input filter form an ef-
fective protection against high input transient voltages
Electromagnetic Immunity
Table 8: Immunity type tests
Phenomenon
Standard 1
Class
Level
Coupling
mode 2
Value
applied
Waveform
Source
Imped.
Test
procedure
In
oper. form.
Per- 3
Electrostatic
discharge
to case
IEC/EN
61000-4-2
2
3
2
contact discharge 4000 Vp
R pin open
i pin connec. to Vi–
1/50 ns
330 Ω
10 positive and
10 negative
discharges
yes
B
air discharge
R pin open
i pin connec. to Vi–
8000 Vp
3 V/m
Electromagnetic IEC/EN
field
antenna
AM 80%
1 kHz
26…1000 MHz
yes
yes
A
B
61000-4-3
ENV 50204
PM, 50% duty
cycle, 200 Hz
resp. frequ.
900 MHz
Electrical fast
transient/burst
IEC/EN
61000-4-4
3
direct +i/–i
2000 Vp bursts of 5/50 ns 50 Ω
5 kHz rep. rate
1 min positive
1 min negative
transients per
coupling mode
transients with
15 ms burst
duration and a
300 ms period
Surge
IEC/EN
2
2
+i/–i
1000 Vp
3 Vrms
1.2/50 µs
2 Ω
5 pos. and 5 neg.
impulses per
coupling mode
yes
B
61000-4-5 5
Conducted
disturbancies
IEC/EN
61000-4-6
+i/–i
+i/–i
AM modulated
50 Ω
0.15...80 MHz
yes
yes
A
B
(130 dBµV) 80%, 1 kHz
150 Ω
Transient
19 Pfl 1 4
150 Vp 0.1/0.3 ms
limited to
<100 A
3 positive
1 Related and previous standards are referenced in Technical Information: Standards.
3 A = normal operation, no deviation from specification, B = temporary deviation from specs. possibe.
4 For 48 IMS 7 types (additional external components required). Not applicable for 24 IMS 7 types.
2 i = input, o = output.
5 External components required.
Electromagnetic Emission
Conducted RFI noise at input according to EN 55022
Radiated RFI noise according to EN 55022.
[dBµV/m]
[dBµV]
90
07024
07023
40
80
35
30
25
20
EN 55022 A
EN 55022 B
70
60
EN 55022 B
50
40
30
20
10
0
15
10
0
[MHz]
MHz
Fig. 19
Typical radio frequency-interference voltage at Ui nom
Io nom, measured with an antenna (distance 10 m). Output
leads 0.1 m, twisted (48 IMS-7-15-15-7).
,
Fig. 18
Typical disturbance voltage (quasi-peak) at the input ac-
cording to CISPR 11/EN 55011 and CISPR 22/EN 55022
measured at Ui nom and Io nom. Output leads 0.1 m, twisted.
(48 IMS 7-15-15-7).
Edition 5/9.99
10/15
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
Immunity to Environmental Conditions
Table 9: Mechanical stress
Test Method
Standard
Test Conditions
Status
Ca
Ea
Eb
Fc
Damp heat
steady state
IEC/DIN IEC 60068-2-3
MIL-STD-810D section 507.2 Relative humidity:
Duration:
Temperature:
40 ±2 °C
%
56 days
Unit not
operating
93 +2/-3
Shock
(half-sinusoidal)
IEC/EN/DIN EN 60068-2-27
MIL-STD-810D section 516.3 Bump duration:
Number of bumps:
Acceleration amplitude:
50 gn = 490 m/s2
11 ms
18 (3 each direction)
Unit
operating
Bump
(half-sinusoidal)
IEC/EN/DIN EN 60068-2-29
MIL-STD-810D section 516.3 Bump duration:
Number of bumps:
Acceleration amplitude:
25 gn = 245 m/s2
11 ms
6000 (1000 each direction)
Unit
operating
Vibration
(sinusoidal)
IEC/EN/DIN EN 60068-2-6
MIL-STD-810D section 514.3
Acceleration amplitude:
0.35 mm (10...60 Hz)
5 gn = 49 m/s2 (60...2000 Hz) operating
10...2000 Hz
Unit
Frequency (1 Oct/min):
Test duration:
7.5 h (2.5 h each axis)
Kb
Salt mist, cyclic
(sodium chloride
NaCl solution)
IEC/EN/DIN IEC 60068-2-52
Concentration:
Duration:
Storage:
Storage duration:
Number of cycles:
5% (30°C)
Unit not
operating
2 h per cycle
40°C, 93% rel. humidity
22 h per cycle
3
Table 10: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar)
Temperature
Standard -7
max
Characteristics
Conditions
Operational 2
min
–25
–25
–40
Unit
TA
TC
TS
Ambient temperature 1
71
95
°C
Case temperature
Storage temperature 1
Non operational
100
1 MIL-STD-810D section 501.2 and 502.2
2 See Thermal Considerations
Table 11: MTBF
MTBF
Ground Benign
Ground Fixed
Ground Mobile
MTBF acc. to MIL-HDBK-217F
24 IMS 7-05-7
TC = 40°C
TC = 40°C
TC = 70°C
TC = 50°C
1'671'000 h
248'000 h
83'800 h
84'800 h
48 IMS 7-15-15-7
1'640'000 h
214'000 h
83'000 h
77'000 h
Edition 5/9.99
11/15
MELCHER
The Power Partners.
IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise indicated.
European
Projection
09030
50.8
0.8 × 1.2 Pins
1.6 PCB holes
3.81
14
3.81
3.81
3.81
3.81
3.81
Bottom view
1
5.08
5.08
5.08
3.81
10
4
PT 2.2 self tapping
4.6
3.81
screws (2×),
45.7
Measuring point
case temperature TC
Fig. 20
Case IMS 7 with standard soldering pins
Weight: <20 g
50.8
09031
0.8 × 1.2 Pins
3.81
3.81
3.81
3.81
3.81
14
10
Bottom view
1
4
5.08
5.08
5.08
3.81
42.4
Measuring point
case temperature TC
Fig. 21
≤4.2
Case IMS 7 with SMD pins (option M)
Weight: <20 g
50.8
09032
1 Pins
35.5
1.2 PCB holes
1
15.2
7
3
1
4
2
6
5
Measuring point
case temperature TC
Fig. 22
Case IMS 7 with C pinout (option C) for double output units. (Pins 6 and 7 are not fitted.)
With single output units pins 4, 6 and 7 are not fitted.
Weight: <24 g
Edition 5/9.99
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12/15
The Power Partners.
Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
Safety and Installation Instructions
Table 13: Pin allocation, standard pinout
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.
Pin
1
Single output units
Double output units
Vi+
Vi–
i
Vi+
Vi–
2
3
i
Connection to the system shall be made via a printed circuit
board according to: Mechanical Data.
4
n.c.
Vo–
Vo+
Vo–
R
R (Trim)
Vo1–
Vo1+
Vo2–
Vo2+
n.c.
The units should be connected to a secondary circuit.
10
11
12
13
14
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 condition. See also: Safety
of operator accessible output circuit.
n.c.
10011
14
13
12
11
10
Input Fuse
1
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 F2A for
24 IMS 7 types and F1A for 48 IMS 7 types.
2
3
4
Bottom view
Fig. 23
Pin allocation standard pinout
Cleaning Agents
Table 14: Pin allocation for C-pinout (option C)
In order to avoid possible damage, any penetration of
cleaning fluids has to be prevented, since the power sup-
plies are not hermetically sealed.
Pin
1
Single output units
Dual output units
Vi+
Vi–
Vi+
Vi–
Vo+
Go
Standards and approvals
2
All DC-DC converters are 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.
3
Vo+
4
no pin
Vo–
5
Vo–
The units have been evaluated for:
• Building in
10012
• 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
3
4
5
1
2
The DC-DC converters are subject to manufacturing sur-
veillance in accordance with the above mentioned UL,
CSA, EN and ISO 9001 standards.
Fig. 24
Pin allocation C pinout, bottom view
Protection Degree
Isolation
The protection degree of the DC-DC converters is IP 30.
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. Melcher will not honour any guar-
antee claims resulting from electric strength field tests.
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
Table 12: Electric strength test voltages, clearance and
creepage distances
The insulation concept table below shows some possible
installation configurations, compliance with which causes
the output circuit of the DC-DC converter to be an SELV cir-
cuit according to IEC/EN 60950 up to a configured output
voltage (sum of nominal voltages if in series or +/– configu-
ration) of 42 V.
Characteristic
I/O
1.2
O/O
0.1
0.15
-
Unit
kVrms
kV DC
nF
Electric strength
test voltage 1 s
1.5
Coupling capacitance
≈1.2
>100
Isulation resistance
at 500 V DC
-
MΩ
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.
Partial discharge
extinction voltage
Consult
factory
-
kV
Edition 5/9.99
13/15
MELCHER
The Power Partners.
IMS 7-Series
DC-DC Converters <40Watt
Industrial Environment
Table 15: Insulation concept leading to an SELV output circuit
Conditions Front end
DC-DC converter
Result
Supply
voltage
Minimum required grade
of isolation, to be provided DC output status of the front end
by the AC-DC front end,
including mains supplied
battery charger
Maximum Minimum required safety
Measures to achieve the
specified safety status of the
output circuit
Safety status of
the DC-DC
converter output
circuit
voltage
output circuit
from the
front end 1
Mains
≤250 V AC
Basic
≤60 V
Earthed SELV circuit 2
ELV circuit
Operational insulation, pro-
vided by the DC-DC converter
SELV circuit
Input fuse 3 output suppressor Earthed SELV
diode(s) 4, and earthed
output circuit(s) 2
circuit
>60 V
≤60 V
>60 V
Hazardous voltage
secondary circuit
Double or reinforced
SELV circuit
Operational insulation, pro-
vided by the DC-DC converter
SELV circuit
TNV-2 circuit
Supplementary insulation,
based on the maximum input
voltage, provided by the
DC-DC converter
Double or reinforced insu-
lated unearthed hazardous
voltage secondary circuit 5
1 The front end output voltage should match the specified input voltage range of the DC-DC converter.
2 The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
3 The 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.
4 Each 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).
5 Has to be insulated from earth by basic insulation according to the relevant safety standard, based on the maximum output voltage
from the front end.
10004
Fuse
+
~
Mains
Suppressor
diode
AC-DC
front
DC-DC
con-
Battery
SELV
end
verter
–
~
Earth
connection
Earth
connection
Fig. 25
Schematic safety concept. Use fuse, suppressor diode
and earth connection as per table Safety concept leading
to an SELV output circuit.
Edition 5/9.99
14/15
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40Watt
IMS 7 Series
Description of Options
Table 16: Survey of options
Option
-9
Function
Characteristics
Operational temperature range TA = –40...71°C
Surface mount version, SMD
C-pinout
Extended temperature range
Excludes option C.
M
C, C2
Excludes option M as well as galvanic isolation between output 1
and 2 of double output units. Not available for 70/110 IMX 7 types.
Option -9
Option C2
Temperature range –40...71°C. The modules will provide
full output power with free air convection cooling.
The C2-pinout configures the electrically isolated double
outputs to one strong single output.
Option C
Option C and C2 exclude option M, the inhibit function as
well as the R-function.
The C-pinout configures the electrically isolated double out-
puts to the "industrial pinout" Vo1+, Vo2– with common
ground Go. With the C-pinout the converter height is in-
creased by the adapter PCB (see also: Mechanical Data).
Option M
Surface mount version.
09119
Note: Precautions should be taken when reflow soldering
the SMD version, option M. The reflow soldering instruc-
tions below should be strictly adhered to. An inadequate
soldering process may permanently damage the converter
or degrade its performance and Melcher will not honour any
guarantee/warranty claims resulting from damage caused
by ignoring the soldering instructions.
4
Top view
50
Infrared soldering is not permitted.
The surface mountable version of this product is assem-
bled with high melting point solder (227°C) to ensure that
the solder joints of of the internal components do not de-
grade in the end users SMD soldering process.
Fig. 27
Proposed solder lands
This product is only specified for "Forced Convection
Reflow Soldering" (Hot Air). Any conventional soldering
profile is acceptable provided that the restriction curve be-
low is not exceeded at any time during the reflow process.
Tpeak [°C]
11051
240
235
230
225
220
215
210
t [s]
205
50
0
20
30
40
10
Fig. 26
Forced convection reflow soldering restriction curve
measured on pin 2
Accessories
Mounting supports for chassis and DIN-rail mounting.
Edition 5/9.99
15/15
MELCHER
The Power Partners.
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