24IMS7-24-24-7X [BEL]
DC-DC Regulated Power Supply Module, 2 Output, 7W, Hybrid, 2 X 1 INCH, 10.50 MM HEIGHT, PACKAGE-9;
| 型号： | 24IMS7-24-24-7X |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 2 Output, 7W, Hybrid, 2 X 1 INCH, 10.50 MM HEIGHT, PACKAGE-9 |
| 文件： | 总12页 (文件大小：249K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Industrial Environment
DC-DC Converters <40 W
IMS 7-Family
7 W DC-DC Converters
IMS 7-Family
Input to output isolation test voltage 1500 V DC
Single and double outputs of 3.3, 5, 12, 15, 24 V DC
Input voltage ranges: 14...36 V DC and 36...75 V DC
• Wide input voltage ranges
• Galvanic isolation, single and double output units
• High efficiency (typ. >85%)
• Inhibit input, output voltage adjustable
• No load and short-circuit proof
• High reliability and no derating
w
• Operating ambient temperature range –25...+71°C
• Emissions below EN 55 022 level B.
• Immunity to IEC 1000- 4 -2, -3, -4, -5 and -6
• 2" × 1" case with 10.5 mm profile
ne
Safety according to IEC 950
LGA
C
Table of Contents
Page
Type Survey .............................................................. 6 - 49
Description ................................................................6 - 49
Functional Description............................................... 6 - 50
Safety and Installation Instructions ........................... 6 - 51
Electrical Input and Output Data ............................... 6 - 52
Description of Options............................................... 6 - 54
Electromagnetic Compatibility EMC.......................... 6 - 55
Supplementary Data ................................................. 6 - 56
Immunity to Environmental Conditions...................... 6 - 58
Mechanical Data ....................................................... 6 - 59
Type Key and Product Marking ................................. 6 - 60
Type Survey
Table 1: Type survey
Output 1
Output 2
Uo nom Io nom
A
Input Voltage Range and Efficiency
Option
Uo nom
Io nom
A
Ui min...Ui max
ηtyp
Ui min...Ui max
ηtyp
%
V DC
V DC
14...36 V DC
%
36...75 V DC
3.3
5.1
1.5
1.2
24 IMS 7-03-7
24 IMS 7-05-7
78
82
48 IMS 7-03-7
48 IMS 7-05-7
78
82
M1
X 2
C 3
5
0.7
0.3
0.24
0.15
5
0.7
0.3
0.24
0.15
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
12
15
24
12
15
24
1 Option M: Version for SMD mounting.
2 Option X: LED "Uo present", available for double output units.
3 Option C: C-pinout, excludes option M as well as galvanic isola-
tion between output 1 and 2 of double output units.
Description
The IMS 7 series has been designed according to the latest
industry requirements and standards (1995) and is particu-
larly suitable for industrial and telecom applications. The
converters are ideal for use in applications where variable
input voltages or high input transients are prevalent, e.g.
mobile applications. They feature consistently high effi-
ciency over the entire input voltage range, high reliability
and good dynamic response to line and load changes.
A special feature is their small case size, 2" × 1" with 10.5
mm height. Generous design margins have been applied.
The circuit is mounted on a single PCB, all components sol-
idly soldered without any wire connections and no potting
material is applied. The thermal design allows operation at
nominal load up to an ambient temperature of 71°C in free
air. For extremely high vibration environments the case has
holes allowing screw mounting.
Edition 2/96 - © Melcher AG
6 - 49
MELCHER
The Power Partners.
IMS 7-Family
DC-DC Converters <40 W
Industrial Environment
Functional Description
The IMS 7 DC-DC modules are feedback controlled flyback
converters using current mode PWM (Pulse Width Modula-
tion). See fig. 1 and 2.
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 shut down.
In the case of the double output units the output voltage is
monitored by a separate transformer winding close to the
1
11
1
11
PWM
4
3
3
10
13
10
12
PWM
10 nF, 200V
2 × 2200 pF
1500 V
2
4
2
12
14
13
14
2 × 2200 pF, 1500 V
Fig. 1
Block diagram, single output types, standard pinout
Fig. 2
Block diagram, double output types, standard pinout
Table 2: Pin allocation, standard pinout see fig. 14 and 15
Table 3: Pin allocation for C-pinout (option C) see fig. 3
and 16
Pin
1
Single output units
Double output units
Pin
1
Single output units
Dual output units
Vi+
Vi–
i
Vi+
Vi–
Vi+
Vi–
Vo+
–
Vi+
Vi–
Vo+
Go
2
2
3
i
3
4
n.c.
Vo–
Vo+
Vo–
R
R
4
10
11
12
13
14
Vo1–
Vo1+
Vo2–
Vo2+
n.c.
5
Vo–
Vo–
n.c.
3
4
5
1
2
Fig. 3
C-pinout
6 - 50
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40 W
IMS 7-Family
Safety and Installation Instructions
The converters comply with IEC 950, EN 60950 and
UL 1950 and are designed to meet EN 41003. The unit
should be connected to a secondary circuit.
Cleaning Agents
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented, since the power supplies
are not hermetically sealed.
Isolation
Table 4: Electric strength test voltages, clearance and
creepage distances
Input to output electric strength tests in accordance with the
safety standards IEC 950, EN 60950, VDE 0805 and
EN 41003 respectively are performed as factory tests and
should not be repeated in the field.
Characteristics Input to Output Output to Output Unit
Electric strength
test voltage
1.2
1.5
1.6
0.1
0.15
0.4
kVrms
kV DC
mm
Important Advice
Melcher will not honour any guarantee/warranty claims
resulting from high voltage tests.
Creepage
distances
Safety
If the output circuit of this DC-DC converter is operator-ac-
cessible according to the IEC 950 related safety standards,
it shall be an SELV circuit (Safety Extra Low Voltage circuit,
i.e. a circuit, separated from mains by at least basic insula-
tion, that is so designed and protected that under normal
and single fault conditions, the voltage between any two
conductors and between any conductor and earth does not
exceed 60 V DC).
In the following table an interpretation is provided of the
IEC 950 safety standard with respect to the safety status of
the output circuit. However, it is the sole responsibility of the
installer or user to assure the compliance with the relevant
and applicable safety standards.
If table 5 is observed, the output of any IMS-family DC-DC
converter is considered to be an SELV circuit up to a nomi-
nal output voltage of 30 V (2 x 15 V in series).
Table 5: Insulation concept for SELV circuits
Nominal Minimum required grade Maximum Minimum required
Minimum required grade of
isolation between the input
Resulting safety
status of the
mains
of isolation, to be
output
safety status of the
supply
provided by the AC-DC
voltage
front end output circuit
and the output of the DC-DC DC-DC converter
voltage front end, including mains from the
converter, provided by
the converter
output circuit
(AC)
supplied battery charger front end
≤150 V
Basic
≤60 V
≤75 V
Earthed SELV circuit 1
Unearthed hazardous
Operational
SELV circuit
Supplementary, based on
voltage secondary circuit 2 AC 150 V
≤250 V
Basic
≤60 V
≤60 V
≤75 V
Earthed SELV circuit 1
SELV circuit
Operational
Operational
Double or reinforced
Double or reinforced insu- Operational
lated unearthed hazardous
voltage secondary circuit,
supplying an SELV circuit 2
1 The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC 950.
2 Has to be insulated from earth by at least basic insulation according to the relevant safety standard, based on the maximum input
voltage of the DC-DC converter.
Edition 2/96 - © Melcher AG
6 - 51
MELCHER
The Power Partners.
IMS 7-Family
DC-DC Converters <40 W
Industrial Environment
Electrical Input and Output Data
General conditions: TA = 25°C, unless TC is specified.
Table 6: 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...TA max
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
0.5
tstart up
trise
Converter 2
start-up time
Worst case condition at
Ui min and full load
0.25
0.5
0.25
s
Rise time 2
Ui nom, Io = Io nom
resistive load
capacitive load
Io = 0, Ui min...Ui max
5
5
12
8
ms
12
15
Iio
No load input current
30
30
15
30
mA
Ii rr
Reflected
Io = 0...Io nom
mApp
ripple current
Ui RFI
Input RFI level
EN 55022 4
B
B
conducted and radiated
Ci
Input capacitance
for surge calculations
Converter operating
Converter inhibited
Converter operating
Converter inhibited
Ui min...Ui max
0.8
0.5
µF
3
Uih
Inhibit voltage
–10...0.8
–10 ...0.8
V DC
open, 2.4...Ui max
open, 2.4...Ui max
Iih
Inhibit current
–0.5
1
–0.5
1
mA
Ii ih
fs
Input current
if unit inhibited
<3.0
<3.0
Switching frequency
Ui min...Ui max, Io = 0...Io nom
approximately 400
approximately 400
kHz
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.
Measured with a resistive or max. admissable capacitive load. (See fig. below)
Switching times are typically 10 ms for transition from one state to another.
2
3
4
Measured with a lead lenght of 0.1 m, leads twisted. Double output units with both outputs in parallel.
Uo
trise
Uo nom
t
tstart up
Fig. 4
Converter start-up and rise time
6 - 52
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40 W
IMS 7-Family
Table 7a: Output data for single output units
Output
Uo nom
3.3 V
5.1 V
Characteristics
Conditions
min typ max
min typ max
Unit
Uo
Output voltage
Ui nom
3.26
3.34
5.05
5.15 V DC
Io = 0.5 Io nom
Ui min...Ui max
Io nom
ICL
Output current
Current limit 1
1.5
1.2
A
Ui nom, TC = 25°C
3.0
2.4
∆Uo U
Line and
Ui min...Ui max
±1
±1
%
load regulation
Io = (0.01...1)Io nom
uo
Output voltage
ripple and noise
Ui min...Ui max
Io = Io nom
70
70
mVpp
(BW = 20 MHz)
Uo clp
Output overvoltage
clamping
115
130
115
130
%
αUo
Temperature coeff. ∆Uo/∆ TC
±0.02
±0.02
%/K
Co ext
Admissable
≤2500
≤2000
µF
capacitive load
td
Dynamic load tran- Ui nom
1
1
ms
sient response time Io = (1...1/
...1)Ionom
4
∆Uo td
Transient output
voltage deviation
±150
±150
mV
Table 7b: Output data for double output units
Output
Uo nom
2 × 5 V
min typ max
2 × 12 V
2 × 15 V
min typ max
2 × 24 V
Characteristics
Conditions
min typ max
min typ max
Unit
Uo1
Uo2
Output voltage
Ui nom
4.95
4.93
5.05 11.88
5.07 11.84
12.12 14.85
12.16 14.80
15.15 23.75
15.20 23.69
24.25 VDC
24.31
Io = 0.5 Io nom
Ui min...Ui max
Io nom
ICL
Output current 1
Current limit 1, 2
Line regulation
2 × 0.7 2 × 0.3
2 × 0.24
2 × 0.15
A
Ui nom, TC = 25°C
2.8
1.2
1.1
0.6
∆Uo U
Ui min...Ui max
Io nom
±1
±1
±1
±1
%
∆Uo l
Load regulation 3
Ui nom
±3
±3
±3
±3
Io = (0,1...1) Io nom
uo1/2
Output voltage
ripple and noise
Ui min...Ui max
Io = Io nom
(BW = 20 MHz)
80
120
150
240
mVpp
%
Uo clp
Output overvoltage Applies to both
clamping 4
Vo1 and Vo2
115
130
115
130
115
130
115
130
αUo
Temperature coeff. ∆Uo/∆ TC
±0.02
≤2000
±0.02
±0.02
±0.02
%/K
Co ext
Admissable
capacitive load 2
≤300
≤200
≤100
µF
td
Dynamic load tran- Ui nom
1
1
1
1
ms
sient response time 2 Io =(1...1/
...1) Ionom
4
∆Uo td
Transient output
voltage deviation
±150
±330
±350
±600
mV
1 The current limit is primary side controlled.
2 Measured with both outputs connected in parallel.
3 Conditions for specified output. Other output loaded with constant current Io = 0.5 Io nom
.
4 The overvoltage protection device is a zener diode whose breakdown region is typically 120...125% of the nominal output voltage. The
zener diode protects the converter only against internally generated overvoltages.
Edition 2/96 - © Melcher AG
6 - 53
MELCHER
The Power Partners.
IMS 7-Family
DC-DC Converters <40 W
Industrial Environment
Input Transient Voltage Protection
Reverse Polarity Protection at Input
A suppressor diode on the input together with the input filter
provides an effective protection against input transients.
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 a fast 2 A (F2A) fuse is recommended.
– For 48 IMS a fast 1 A (F1A) fuse is recommended.
To achieve IEC 801-5, level 2 compliance for 48 IMS 7
types or to withstand the 150 V transient according to
19 Pfl 1 an additional inductor and capacitor should be pro-
vided externally, as shown below. (Not applicable for 24
IMS 7 types.)
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.
L
V+
V–
Vi+
i
+
48 IMS 7
C
Output Overvoltage Protection
The outputs of the units (single and double) are protected
against overvoltages by a zener diode across one of the
outputs. The main purpose of this feature is to protect
against possible overvoltages which could occur due to a
failure in the feedback control circuit. Under worst case
conditions the suppressor diode will short circuit. The sup-
pressor diode is not designed to withstand externally ap-
plied overvoltages. In the case of the double outputs since
both outputs track each other a suppressor diode is only
provided on one of the outputs.
Vi–
Inductor (L):
Capacitor (C):
Manufacturer: TOKO
Manufacturer: Nippon Chemi-Con
Part Number: SXE 100 VB 68 M J25
Characteristics: 68 µF, 100 V,
105°C, 190 mΩ
Part Number: 494LYF-0098K
Characteristics: 330 µH, 0.65 Ω,
620 mA
8
25
0.7
0.6
5
5
Fig. 5
Example for external circuitry to comply with IEC 801-5,
level 2, for 48 IMS 7 types
Description of Options
Option X
Option C
A yellow LED is provided indicating that the output voltage
is present.
The C-pinout allows for integration into designs where e.g.
a second source is a must. With the C-pinout the converter
height is increased by the adapter PCB (see also Mechani-
cal Data).
Option X is available for double output units.
Option M
Option C excludes option M, the inhibit function as well as
the R-function. Double outputs are connected in series.
Surface mount version. See Mechanical Data.
Option M excludes option C.
Note: Precautions should be taken when reflow soldering
the SMD version, option M. Please request the sol-
dering instructions for information about reflow sol-
dering. These instructions should be strictly adhered
to. An inadequate soldering process may perma-
nently damage the converter or degrade its perform-
ance and Melcher will not honour any guarantee/
warranty claims resulting from damage caused by
ignoring the soldering instructions.
Infrared soldering is not permitted.
6 - 54
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40 W
IMS 7-Family
Electromagnetic Compatibility EMC
A suppressor diode together with an input filter form an ef-
fective protection against high input transient voltages
which typically occur in many installations, but especially in
battery driven mobile applications.
Electromagnetic Immunity, Generic Standard EN 50082-1
Table 8: Immunity type tests
2
Electrostatic
discharge
IEC 801-2
(1991-04)
IEC 1000-4-2
2
contact discharge
to case
R-pin open
i-pin connec. to Vi–
4000 Vp
8000 Vp
1/50 ns
330 Ω
10 positive and
10 negative
discharges
yes
3
2
3
air dischg. to case
R-pin open
i-pin connec. to Vi–
1
2
Electric field
IEC 801-3
(1984)
IEC 1000-4-3
antenna in
1 m distance
3 V/m AM modulated
80% 1 kHz
26…1000 MHz
yes
yes
Fast transient/ IEC 801-4
burst
+i/–i
+i/–i
2000 Vp bursts of 5/50 ns
5 kHz rep. rate
transients with
50 Ω
1 min positive
1 min negative
bursts per
(1988)
IEC 1000-4-4
15 ms burst
duration and a
300 ms period
coupling mode
2
Transient
IEC 801-5 4
(Draft 1993-01)
IEC 1000-4-5 4
2
2
1000 Vp
1.2/50 µs
2 Ω
5 positive and
5 negative
impulses per
coupling mode
yes
1
2
Conducted
disturbance
IEC 801-6
IEC 1000-4-6
+i/–i
+i/–i
130 dBµV AM modulated
50 Ω
0.15...80 MHz
yes
yes
(3 Vrms
)
80%, 1 kHz
150 Ω
Transient
19 Pfl 1 4
150 Vp
0.1/0.3 ms
limited to
<100 A
3 positive
5 repetitions
4 For 48 IMS 7 types (additional external components required).
Not applicable for 24 IMS 7 types
1 Normal operation
2 Normal operation, temporary deviations from specific. possible
3 i = input, o = output
Electromagnetic Emission
90
80
70
80
EN 55022 A
70
60
EN 55014
60
50
EN 55022 B
50
40
30
20
10
0
40
30
20
10
0
Frequency [MHz]
Frequency [MHz]
Fig. 7
Fig. 6
Typical radio frequency interference voltage at Uo nom
,
Typical radiated noise measured with a MDS clamp at
Po nom. Output leads 0.1 m, twisted. (48 IMS 7-15-15-7)
I
o nom, measured with an artifical mains network and a
quasi peak detector. Output leads 0.1 m, twisted.
(48 IMS 7-15-15-7)
Edition 2/96 - © Melcher AG
6 - 55
MELCHER
The Power Partners.
IMS 7-Family
DC-DC Converters <40 W
Industrial Environment
Supplementary Data
Inhibit Function
either: Between the R pin and Vo– to achieve an output
voltage adjustment range of approximately
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 Vo– to enable the output
(active low logic, fail safe).
Uo = 75...100% Uo nom
.
U
R
ext ≈ 4 kΩ • –––––o––––
Uo nom – Uo
or: Between the R pin andVo+ to achieve an output volt-
age range of approximately Uo = 100...105% Uo nom
.
Converter operating:
Converter inhibited
or inhibit pin left open:
–10 V...0.8 V
(Uo – 2.5V)
R'ext ≈ 4 kΩ • ––––––––––––––––––––
2.5 V • (Uo/Uo nom – 1)
b) Adjustment by means of an external voltage Uext be-
tween Vo– and R pins.
2.4 V...Ui max
The control voltage range is 1.87...2.62 V and allows for
an adjustment in the range of approximately 75...105%.
Uo • 2.5 V
Vi+
i
U
ext ≈ –––––––––
Uo nom
Attempting to adjust the output below this range will
cause the converter to shutdown (hiccup mode).
Vi–
Note: Applying an external control voltage >2.75 V
Fig. 8
may damage the converter.
If the inhibit is not used the inhibit pin should be con-
nected to Vi–
Vi+
Vo+
R
Connection in Series or in Parallel
Connection in series:
R'ext
The outputs of single or double output units can be con-
nected in series without any precautions, taking into con-
sideration that the highest output voltage should remain
below 60 V for SELV operation.
Uref 2.5 V
4 kΩ
+
–
control
circuit
Uext
Rext
Connection in parallel:
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.
Vo–
Vi–
Fig. 9
Short Circuit Behaviour
Output voltage control for single output units by means of
the R-input
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.
Double output units:
The R-pin 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 in
the range of 100...105% of Uo nom or an external voltage
Adjustable Output Voltage (R-input)
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-
source in the range of 75...105% of Uo nom
.
Vi+
Vo1+
Vo1–
Vo2+
put Data") increases proportionally to Uo/Uo nom
.
R
Single output units:
+
The R input control pin is referenced to the secondary side
of the converter. Adjustment of the output voltage is possi-
ble by means of either an external resistor or a voltage
source.
Uext
Rext
Control
circuit
–
Uref 2.5 V
Vo2–
Vi–
a) Adjustment by means of an external resistor Rext
:
Depending upon the value of the required output voltage,
the resistor shall be connected
Fig. 10
Output voltage control for double output units by means of
the R-input
6 - 56
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40 W
IMS 7-Family
a)Adjustment by means of an external resistor.
b) Adjustment by means of an external voltage source Uext.
Programming of the output voltage by means of an exter-
nal resistor Rext is possible within a limited range of
100...105% of Uo nom. Rext should be connected between
the R-pin and Vi–.Connection of Rext to Vi+ may damage
the converter. 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 outputs.
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 greater than 20 V will set the
converter into a hiccup mode. Direct paralleling of the R-
pins of units connected in parallel is feasible.
Table 9: Rext for Uo > Uo nom
;
approximate values (Ui nom, Io1, 2 = 0.5 Io1/2 nom
)
Table 10: Uo versus Uext for Uo = 75...105% Uo nom
;
typical values (Ui nom, Io1, 2 = 0.5 Io1/2 nom
)
Uo nom
2 × 5 V
Rext [kΩ]
2 × 12/15/24 V
Rext [kΩ]
Uo nom
Uo [% Uo nom
]
2 × 5 V
2 × 12 V
2 × 15 V
2 × 24 V
105...108 (107 typically)
0
18
43
86
175
470
∞
0
1.5
5.6
12.6
26
Uo [% Uo nom
]
Uext [V]
Uext [V]
Uext [V]
Uext [V]
105
104
103
102
101
100
105
102
95
0.5
1.68
4.60
8.74
12.84
0.07
1.43
4.60
9.22
13.64
0.37
1.64
4.60
8.92
13.28
0.25
1.60
4.60
9.23
13.75
85
68
75
∞
Output Voltage Regulation
Output voltage regulation of double output units (2 × 12 V)
Output voltage regulation of single output units:
with output 1 and 2 connected in parallel:
Uo [V]
Uo [V]
13
5.5
5.0
4.5
12
11
10
9
4.0
3.5
3.0
8
7
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Io total [A]
0
0.2
0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Io [A]
0.4
Fig. 11
Fig. 12
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.
Load regulation of double output units (2 x 12 V) with out-
puts independently loaded. Cross load effect is negligible.
Uo1 [V]
13.5
13.0
12.5
Io2 = (0.1...1) Io nom
12.0
11.5
11.0
0.25
0.03
0.15
0.30 0.35
Io1 [A]
0.05 0.10
0.20
Fig. 13
Uo1 versus Io1 (typ) for various Io2
Edition 2/96 - © Melcher AG
6 - 57
MELCHER
The Power Partners.
IMS 7-Family
DC-DC Converters <40 W
Industrial Environment
Immunity to Environmental Conditions
Table 11: Mechanical stress
Test Method
Standard
Test Conditions
Ca
Damp heat
steady state
DIN 40046 part 5
IEC 68-2-3
Temperature:
Relative humidity:
Duration:
40 ±2 °C
93 +2/–3 °C
56 days
Unit not operating
Cb
Ea
Damp heat
EN 50155
Damp heat:
Temperature gradient:
2 × 25 h
3 K/s for ∆δ = 40°C
Shock
(half-sinusoidal)
DIN 40046 part 7
IEC 68-2-27
Acceleration amplitude:
Bump duration:
50 gn = 490 m/s2
11 ms
Number of bumps:
18 (3 each direction)
Unit operating
Eb
Fc
Continous shock
(half-sinusoidal)
DIN 40046 part 26
IEC 68-2-29
Acceleration amplitude:
Bump duration:
Number of bumps:
25 gn = 245 m/s2
11 ms
6000 (1000 each direction)
Unit operating
Vibration
(sinusoidal)
DIN 40046 part 8
IEC 68-2-6
Frequency (1 Oct/min):
Maximum vibration amplitude:
Acceleration amplitude:
Test duration:
10...2000 Hz
0.35 mm (10...60 Hz)
5 gn = 49 m/s2
7.5 h (2.5 h each axis)
Unit operating
Thermal considerations
Table 12: Temperature specifications, values given are for an air pressure of 800...1200 hPa (800...1200 mbar)
Characteristics
min
–25
–25
–40
max Unit
TA
TC
TS
Standard operational ambient temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)
71
95
°C
Standard operational case temperature range -7
Storage temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)
100
Table 13: MTBF
Values at specified
Case Temperature
Types
Ground Benign
Ground Fixed
40°C 70°C
Ground Mobile
Unit
40°C
50°C
MTBF according to
MIL-HDBK-217F, notice 2
48 IMS 7-15-15-7
IMS 7
1'640'000
214'000 83'000
77'000
h
Device hours
n.a.
n.a.
n.a.
6 - 58
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Industrial Environment
DC-DC Converters <40 W
IMS 7-Family
Mechanical Data
Dimensions in mm.Tolerances ±0.3 mm unless otherwise indicated.
European
Projection
50.8
0.8 × 1.2 Pins
1.6 PCB holes
3.81
14
3.81
3.81
3.81
3.81
3.81
1
5.08
Bottom view
5.08
5.08
10
4
3.81
3.81
M2 self tapping screws (2×)
45.7
Fig. 14
Case IMS 7 with standard soldering pins
50.8
0.8 × 1.2 Pins
3.81
3.81
3.81
3.81
3.81
3.81
14
1
5.08
5.08
Bottom view
10
5.08
3.81
4
4.2
45.7
Fig. 15
Case IMS 7 with SMD pins (option M)
2.8
50.8
35.5
1 Pins
1.2 PCB holes
15.2
3
1
4
2
5
Fig. 16
Case IMS 7 with C-pinout (option C)
for double output units.
With single output units pin 4 is not fitted.
Edition 2/96 - © Melcher AG
6 - 59
MELCHER
The Power Partners.
IMS 7-Family
DC-DC Converters <40 W
Industrial Environment
Type Key and Product Marking
Type Key
24 IMS 7 - 05 - 05 -7 X M C
Input voltage range Ui 14...36 V DC........................... 24
36...75 V DC........................... 48
Family........................................................................IMS 7
Nominal output voltage for output 1 [V DC]
3.3, 5, 5.1, 12, 15, 24
Dash: Designates double output unit with two independent
galvanically isolated outputs .................................. - 1
Nominal output voltage for output 2 [V DC] ... 5, 12, 15, 24
Operating ambient temperature range TA
TA = –25...71°C.................................................... -7
Options: LED "Output voltage present" ......................... X 2
SMD version................................................... M
C-pinout.......................................................... C 3
1
Not applicable for option C.
Only available with double output units.
C-pinout excludes option M.
2
3
Examples: 48 IMS 7-05-05-7M: DC-DC converter, input voltage range 36...75V, 2 galvanically isolated outputs each pro-
viding 5 V, 700 mA, surface mount version.
24 IMS 7-0505-7XC: DC-DC converter, input voltage range 14...36 V, C-pinout with outputs ±5 V, 700 mA,
equipped with LED indicating output voltage present.
Product Marking
Main face: Basic type designation, output voltage and current, applicable safety approval and recognition marks,
Melcher patent nos. and company logo.
Side label: Date code and serial no.
Bottom:
Pin numbers, company logo.
6 - 60
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
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