40IMX7-03-7M [BEL]
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| 型号： | 40IMX7-03-7M |
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BEL FUSE INC. |
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Rugged Environment
DC-DC Converters <40Watt
IMX 7 Series
7 Watt DC-DC Converters
IMX 7 Series
Input to output electric strength test up to 2.5 kV DC
Input voltage ranges:
8.4...36, 16.8...75, 40...121 and 60...150 V DC
Single, double outputs of 3.3, 5, 12, 15 and 24 V DC
• Extremely wide input voltage ranges
• Electrical isolation, also between outputs
• Emissions below EN 55 022 level B.
• Immunity to IEC/EN 61000-4-2, -3, -4, -5 and -6
• High efficiency (typ. 84%)
10.5
0.42"
25.4
50.8
1.0"
2.0"
• Inhibit input, output voltage adjustable
• Flex power: flexible load distribution on outputs
• Outputs no-load, overload and short-circuit proof
• Operating ambient temperature up to –40...85°C
• High reliability and no derating
• 2" × 1" case with 10.5 mm profile
• Supplementary insulation
Safety according to IEC/EN 60950, UL 1950
LGA
1
C
1 For 70/110 IMX types
Summary
The IMX 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 particularly
suitable for use in mobile or stationary applications in trans-
port, railways, industry or telecommunications where vari-
able input voltages or high transient voltages are prevalent.
60 V DC. They are designed and built according to the inter-
national safety standards IEC/EN 60950, UL 1950, CAN/
CSA C22.2 No.950-95 and are LGA and UL marked. The
70 IMX 7 and 110 IMX 7 types are CE marked.
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 re-
peatability 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 85°C in free air without using any potting material. For
extremely high vibration environments the case has holes
for screw mounting.
Covering a total input voltage range from 8.4 V DC up to
150 V DC with four different types the units are available
with single and electrically isolated double outputs allowing
the configuration of output voltages from 3.3 V DC up to
48 V DC externally adjustable, with flexible load distribution
on double output units. An inhibit input allows remote con-
verter 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.
Various options as e.g. extended temperature range
–40...85°C, industrial C pinout or SMD pinout provide a
high level of application specific engineering and design-in
flexibility.
The converters provide supplementary insulation with
SELV outputs as e.g. required in battery supported sys-
tems where the bus voltage may exceed the SELV limit of
Table of Contents
Page
Page
Summary.......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Ke ............................................................................ 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.................................................... 14
Edition 5/9.99
1/15
MELCHER
The Power Partners.
IMX 7-Series
DC-DC Converters <40Watt
Rugged Environment
Type Survey and Key Data
Table 1: Type survey
Output 1
Output 2
Output Power
Po nom
Input voltage
range
Efficiency
htyp
Type
designation
Options 2, 4
Uo1 nom Io1 nom Uo2 nom Io2 nom
[V DC]
[A] 1
[V DC]
[A] 1
[W]
[V DC]
[%]
3.3
3.3
3.3
3.3
1.5
1.5
1.5
1.5
-
-
-
-
-
-
-
-
5
5
5
5
8.4...36
16.8...75 3
40...121
60...150
79
81
79
79
20 IMX 7-03-7
40 IMX 7-03-7
70 IMX 7-03-7
110 IMX 7-03-7
-8, D, M, C
-8, D, M, C
-8, D, M
-8, D, M
5.1
5.1
5.1
5.1
1.2
1.2
1.2
1.2
-
-
-
-
-
-
-
-
6.1
6.1
6.1
6.1
8.4...36
16.8...75 3
40...121
60...150
80
81
80
80
20 IMX 7-05-7
40 IMX 7-05-7
70 IMX 7-05-7
110 IMX 7-05-7
-8, D, M, C
-8, D, M, C
-8, D, M
-8, D, M
5
5
5
5
0.6
0.7
0.7
0.7
5
5
5
5
0.6
0.7
0.7
0.7
6
7
7
7
8.4...36
16.8...75 3
40...121
60...150
82
83
82
82
20 IMX 7-05-05-7
40 IMX 7-05-05-7
70 IMX 7-05-05-7
110 IMX 7-05-05-7
-8, M, C 5
-8, M, C 5
-8, M
-8, M
12
12
12
12
0.25
0.3
0.3
12
12
12
12
0.25
0.3
0.3
6
8.4...36
16.8...75 3
40...121
60...150
84
84
83
84
20 IMX 7-12-12-7
40 IMX 7-12-12-7
70 IMX 7-12-12-7
110 IMX 7-12-12-7
-8, M, C 5
-8, M, C 5
-8, M
7.2
7.2
7.2
0.3
0.3
-8, M
15
15
15
15
0.2
15
15
15
15
0.2
6
8.4...36
16.8...75 3
40...121
60...150
84
84
83
84
20 IMX 7-15-15-7
40 IMX 7-15-15-7
70 IMX 7-15-15-7
110 IMX 7-15-15-7
-8, M, C 5
-8, M, C 5
-8, M
0.24
0.24
0.24
0.24
0.24
0.24
7.2
7.2
7.2
-8, M
24
24
24
24
0.13
0.15
0.15
0.15
24
24
24
24
0.13
0.15
0.15
0.15
6.2
7.2
7.2
7.2
8.4...36
16.8...75 3
40...121
60...150
84
84
83
84
20 IMX 7-24-24-7
40 IMX 7-24-24-7
70 IMX 7-24-24-7
110 IMX 7-24-24-7
-8, M, C 5
-8, M, C 5
-8, M
-8, M
1 Flexible load distribution on double outputs possible.
2 See table: Survey of options.
4 Temperature range -9 (–40...71°C) will be standard in the future.
5 Single output with C-pinout is possible.
3 Operation at lower input voltage possible: Po approx. 80% of Po nom at Ui min = 14.4 V.
Type Key
20 IMX 7 - 05 - 05 -7 D M C
Input voltage range Ui
8.4...36 V DC ............................................ 20
16.8...75 V DC ............................................ 40
40...121 V DC ............................................ 70
60...150 V DC .......................................... 110
Series ........................................................................IMX 7
Output voltage type output 1 .................. 03, 05, 12, 15, 24
Dash:
Designates double output unit with two
independent electrically isolated outputs ...... -
1
Output voltage type output 2 ........................ 05, 12, 15, 24
Operating ambient temperature range TA
–25...71°C .................................................. -7
–40...85°C (option) ..................................... -8
2 4
2 4
Options:
Signal Out OK ............................................. D
SMD version ............................................... M
C-pinout ................................................ C, C2
3 4
3 4 5
1 Not applicable for option C.
4 For delivery lead times contact factory. Some types require a minimum order quantity.
2 Option -8 excludes option D and vice versa. 5 Configures the 2 outputs either to ± connection or to one strong single output.
3 Option M excludes option C and vice versa.
Examples: 40 IMX 7-05-05-7M: DC-DC converter, input voltage range 16.8...75 V, 2 electrically isolated outputs each
providing 5 V, 700 mA, surface mount version.
20 IMX 7-0505-7C: DC-DC converter, input voltage range 8.4...36 V, C pinout with outputs ±5 V, 600 mA.
20 IMX 7-12-7C2: DC-DC converter, input voltage range 8.4...36 V, C pinout with one output 12 V, 500 mA.
Edition 5/9.99
MELCHER
2/15
The Power Partners.
Rugged Environment
DC-DC Converters <40Watt
IMX 7 Series
Functional Description
In the case of the dual and 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 (Trim) input is referenced to the primary side
and allows programming 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.
The IMX 7 DC-DC modules are feedback controlled flyback
converters using current mode PWM (Pulse Width Modula-
tion). See block diagram for single and double output types.
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 power.
The inhibit input allows remote converter on/off.
03042
03041
1
3
11
Vi+
Vo+
1
11
Vi+
Vo1+
PWM
i
4
3
(Trim) R
i
10
13
Vo1–
10
12
PWM
10 nF
Vo–
Vo2+
2 × 2200 pF
2
4
Vi–
2
12
14
Vo2–
Vi–
13
14
R
D
n.c.
n.c.
2 × 2200 pF
Fig. 1
Block diagram, single output types, standard pinout
Fig. 2
Block diagram, double output types, standard pinout
03063
03062
1
3
Vi+
Vo+
Go
1
3
Vi+
Vo+
PWM
10
PWM
10 nF
5
Vo–
2 × 2200 pF
2
Vi–
2
5
Vi–
Vo –
2 × 2200 pF
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.
IMX 7-Series
DC-DC Converters <40Watt
Rugged Environment
Electrical Input Data
General conditions:
– TA = 25°C, unless TC is specified.
– Connector pins i and Vi– interconnected.
– Trim or R input not connected.
Table 2: Input Data
Input
20 IMX 7
40 IMX 7
70 IMX 7
110 IMX 7
Characteristics
Conditions
min typ max min typ max min typ max min typ max Unit
Ui
Input voltage range 1
TC min...TC max
Io = 0...Io nom
8.4
36 16.8 6
75 40
100
121 60
150 V DC
Ui nom
Ui sur
Nominal input voltage
20
40
70
110
Repetitive surge
voltage
abs. max input (3 s)
150 V
50 5
4
4
4
tstart up
Converter 2
start-up time
switch on
Worst case condition at
Ui min and full load
0.25 0.5
0.1
0.25 0.5
0.25 0.5
0.25 0.5
s
inh. release
0.1
0.1
0.1
trise
Rise time 2
Ui nom
Io nom
resistive load
5
5
5
5
ms
capacitive load
12
12
12
12
Ii o
No load input current
Input capacitance
Inhibit voltage
Io = 0, Ui min...Ui max
for surge calculation
unit operating
15 30
4.7
8
15
8
15
8
15
mA
µF
Ci
0.5
0.2
0.2
Uinh
–10...0.8
–10 ...0.8
–10 ...0.8
–10 ...0.8
V DC
unit inhibited
open or
2.4...Ui max
open or
2.4...Ui max
open or
2.4...75
open or
2.4...75
Iinh
Inhibit current
unit operating
unit inhibited
Ui min...Ui max
–0.5
–0.5
–0.5
–0.5
mA
1
1
1
1
Ii inh
Input current
<3.0
<3.0
<3.0
<3.0
if unit shut down
7
Iinr p
fs
Inrush peak current
Switching frequency
Ui = Ui nom
3.8
3.7
approx. 400
30
4.2
approx. 400
20
5.6
A
Ui min...Ui max, Io = 0...Io nom approx. 400
approx. 300 kHz
10 mApp
Ii rr
Reflected
Io = 0...Io nom
50
ripple current
ui RFI
Input RFI level
EN 55022 3
B
B
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. If the output voltage is set to a higher value,
Ui min will be proportionally increased.
2 Measured with a resistive and max. admissible capacitive load.
3 Measured with a lead lenght of 0.1 m, leads twisted. Double output units with both outputs in parallel. 70/110 IMX 7 types need an
external capacitor at the input. (e.g. 1µF film or ceramic)
4 See 19 Pfl 1: Electromagnetic Immunity.
5 The DC-DC converter shuts down automatically at approx. 38 V.
6 Operation at lower input voltage possible: Po approx. 80% of Po nom at Ui min = 14.4 V.
7 Source impedance according to prETS 300132-2, version 4.3, at Ui nom
.
04008
Uo
trise
Uo nom
t
tstart up
Fig. 5
Converter start-up and rise time
Edition 5/9.99
4/15
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <40Watt
IMX 7 Series
Input Transient Voltage Protection
In many applications transient voltages on the input of the
converter are always possible. These may be caused for ex-
ample by short circuits between Vi+ and Vi– where the net-
work inductance may cause high energy pulses.
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: Components for
external circuitry to comply with IEC/EN 61000-4-5.
In order to protect the converters the IMX 7 types have a
built-in transient protection as per table below:
Please note: The suppressor diode D is only necessary for
20 IMX 7 types. To withstand 150 V transients according to
19 Pfl 1, applicable for 40 IMX 7 types, the same external
circuitry with similar components as for IEC/EN 61000-4-5,
level 2 compliance can be used.
Table 3: Built-in transient voltage suppressor
Type
Breakdown
Voltage
VBR nom
Peak Power
at 1 ms
PP
Peak Pulse
Current
IPP
07064
20 IMX 7 1
40 IMX 7 2
70 IMX 7 2
110 IMX 7 2
over voltage lockout at approx. 38 V
Vi+
L
100 V
144 V
167 V
1500 W
600 W
600 W
11 A
2.9 A
2.5 A
+
i
C
D
Vi–
1 The built-in overvoltage lockout circuit shuts down the converter
at approx. 38 V protecting the input up to 50 V DC. For higher
transient voltages an external suppressor or voltage limiting
circuit as e.g. for IEC/EN 61000-4-5, level 2 compliance should
be provided.
Fig. 6
Example for external circuitry to comply with
IEC/EN 61000-4-5, level 2 (transzorb D not necessary for
40/70/110 IMX 7 types).
2 If transients generating currents above the peak pulse current
are possible then an external limiting network such as the circuit
recommended for IEC/EN 61000-4-5, level 2 compliance is
necessary.
Table 4: Components for external circuitry to comply with IEC/EN 61000-4-5
Circuit Ref.
20 IMX 7
40 IMX 7
70 IMX 7
110 IMX 7
L
330 µH, 0,115 Ω, 1 A
330 µH, 0,42 Ω, 600 mA
1000 µH, 2.9 Ω, 290 mA
330 µH, 0.65 Ω, 430 mA
TDK SF-T8-110S-01
TDK TSL1110-331KR55
Toko 822LY-102K
Toko 822LY-331K
C
D
68 µF, 63 V, 85°C
68 µF, 100 V, 85°C
47 µF, 150 V, 85°C
200 µF, 200 V, 105°C
Motorola 1.5KE39A
n.a.
n.a.
n.a.
04033
17.5
10
04029
04032
10.5
0.7
5
7.5
5
0.7
Fig. 7
Fig. 8
Fig. 9
Dimensions of inductor L.
(TDK SF-T8-110S-01)
Dimensions of inductor L.
(TDK TSL1110-331KR55)
Dimensions of inductor L.
(Toko R622LY-102K)
Reverse Polarity Protection at Input
1 A/Div.
4
04030
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 20 IMX 7 a fast 2 A (F2A) fuse is recommended.
– For 40 IMX 7 a fast 1 A (F1A) fuse is recommended.
– For 70 IMX 7 a fast 0.63 A (F.63A) fuse is recommended.
– For 110 IMX 7 a fast 0.63A (F.63A) fuse is recommended.
3
2
1
0
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.
10 µs/Div.
Fig. 10
Typical inrush current at Ui nom, Po nom vs. time (40 IMX 7)
measured according to prETS 300132-2 (Version 4.3)
Edition 5/9.99
5/15
MELCHER
The Power Partners.
IMX 7-Series
DC-DC Converters <40Watt
Rugged Environment
Electrical Output Data
General conditions:
– TA = 25°C, unless TC is specified.
– Connector pins i and Vi– interconnected.
– Trim or 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
Conditions
Ui nom
min typ max
min typ max
Unit
VDC
A
3.28
3.32
5.07
5.13
Io nom Output current
Ui min...Ui max
Ui nom, TC = 25°C
1.5
1.2
2
Io L
Current limit
3.0
2.4
DUo U Line and load regulation Ui min...Ui max
Io = (0.05...1) Io nom
±1
±1
%
5
uo1, 2 Output voltage noise
20/40/70 IMX
110 IMX
Ui min...Ui max
Io = Io nom
70
70
mVpp
6
20 40
40 50
130
20 40
40 50
130
Uo clp Output overvoltage
115
115
%
limitation 7
Co ext Admissible capacitive load
≤2500
≤2000
µF
mV
ms
uo d Dynamic Voltage deviat. Ui nom
±250
±250
1
load
regulat
I
o nom ↔ / Io nom
2
td
Recovery time
1
1
aUo Temperature coefficient
DUo/DTC (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
Uo2
Output voltage
Ui nom
Io = 0.5 Io nom
4.96
4.95
5.04 11.90
5.05 11.88
12.10 14.88
12.12 14.85
15.12 23.81
15.15 23.75
24.19 VDC
24.25
Io nom Output
current 1
20 IMX Ui min...Ui max
40/70/110 IMX
2 × 0.6 2 × 0.25
2 × 0.7 2 × 0.3
2 × 0.2
2 × 0.24
0.95
2 × 0.13
2 × 0.15
0.5
A
Io L
Current
20 IMX Ui nom, TC = 25°C
2.4
2.8
±1
1.0
1.2
±1
±3
limit 2, 3
40/70/110 IMX
1.1
±1
±3
0.6
±1
±3
DUo U Line regulation
DUo l Load regulation 4
Ui min...Ui max, Io nom
%
Ui nom
±3
Io = (0.1...1) Io nom
5
uo1, 2 Output voltage noise
Ui min...Ui max
Io = Io nom
80
120
150
30 60
130
240 mVpp
50 100
130
≤100
6
20 40
130
25 50
130
Uo clp Output overvoltage limit. 7 Minimum load 1% 115
115
115
115
%
Co ext Admissible
capacitive load 3
≤2000
≤300
≤200
µF
uo d
td
Dynamic Voltage deviat. Ui nom
±150
±330
±350
±600
mV
ms
1
load
Io nom ↔ / Io nom
2
Recovery time
1
1
1
1
regulat.
aUo
Temperature coefficient
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 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
MELCHER
6/15
The Power Partners.
Rugged Environment
DC-DC Converters <40Watt
IMX 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
across 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 to 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. 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.
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
25
0.03
0.10
0.15
0.25
0.35 Io1 [A]
0.05
0.20
Fig. 13
Fig. 14
Uo1 versus Io1 (typ) for various Io2 (2 × 12 V).
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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MELCHER
The Power Partners.
IMX 7-Series
DC-DC Converters <40Watt
Rugged Environment
h [%]
05041
Uo [%]
05052
90
overload short circuit condition
switch-off
Ui nom
Ui max
Ui min
100
70
80
70
8.5
60
50
40
t [ms]
60.5
60.5
Po
Po nom
[%]
50
100
25
75
Fig. 15
Fig. 16
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
(40 IMX 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 IMX 7 single and double output
units offer adjustable output voltage(s) by using the control
input R. 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
–10 V...0.8 V
put Data) increases proportionally to Uo/Uo nom
.
or inhibit pin left open: 2.4 V...Ui max
(<75 V for 70/110 IMX 7)
Single output units:
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.
06070
Vi+
a) Adjustment by means of an external resistor Rext1
:
Depending upon the value of the required output voltage,
the resistor shall be connected
i
either: Between the R pin and Vo– to achieve an output
voltage adjustment range of approximately
Vi–
Uo = 75...100% Uo nom. (85...100% for 3.3 V outputs)
Fig. 17
Uo
If the inhibit is not used the inhibit pin should be con-
nected to Vi–
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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DC-DC Converters <40Watt
IMX 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
]
Rext [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
–
Vo–
Vi–
b) Adjustment by means of an external voltage source Uext
.
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 indi-
cates typical Uo versus Uext values under nominal condi-
tions (Ui nom, Io = 0.5 Io nom), with either paralleled outputs
or equal load conditions on each output. Applying a con-
trol voltage greater than 20 V will set the converter into a
hiccup mode. Direct paralleling of the R-pins of units con-
nected in parallel is feasible.
Fig. 18
Output voltage control for single output units by means of
the R-input
Double output units:
The R input (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 exter-
nal resistor in the range of 100...105% of Uo nom, or an ex-
Table 7: Uext for Uo = 75...105% Uo nom
;
typical values (Ui nom, Io1, 2 = 0.5 Io1/2 nom
)
ternal voltage source in the range of 75...105% of Uo nom
.
Uo [% Uo nom
]
Uext [V]
06030
Vi+
Vo1+
≥105
102
95
85
75
0
1.6
4.5
9
Vo1–
R (Trim)
+
Vo2+
Control
circuit
13
Uext
Rext
Uref 2.5 V
–
Vo2–
Vi–
Fig. 19
Output voltage control for double output units by means of
the R input
Edition 5/9.99
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The Power Partners.
IMX 7-Series
DC-DC Converters <40Watt
Rugged 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
3
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
10 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
4
direct +i/–i
4000 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
3
3
+i/–i
2000 Vp
10 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
(140 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 40 IMX 7 types (additional external components required). Not applicable for 20 IMX 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. 21
Typical radio frequency-interference voltage at Ui nom
Io nom, measured with an antenna (distance 10 m). Output
leads 0.1 m, twisted (70 IMX-7-15-15-7).
,
Fig. 20
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.
(40 IMX 7-15-15-7). External capacitor (1 µF ceramic or
film) required at the input for 70 IMX 7, 110 IMX 7 types.
Edition 5/9.99
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Rugged Environment
DC-DC Converters <40Watt
IMX 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:
100 gn = 981 m/s2
6 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:
40 gn = 392 m/s2
6 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)
2
Fda Random vibration IEC 60068-2-35
Acceleration spectral density: 0.05 gn /Hz
Unit
wide band
reproducibility
high
Frequency band:
Acceleration magnitude:
Test duration:
20...500 Hz
4.9 gn rms
3 h (1 h each axis)
operating
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
Option -8
Characteristics
Conditions
Operational 2
min
max
71
min
max
85
Unit
TA
TC
TS
Ambient temperature 1
–25
–25
–40
–40
–40
–55
°C
Case temperature
Storage temperature 1
95
105
105
Non operational
100
1 MIL-STD-810D section 501.2 and 502.2
2 See: Thermal Considerations
Table 11: MTBF and device hours
MTBF
Ground Benign
Ground Fixed
Ground Mobile
TC = 50°C
84'800 h
MTBF acc. to MIL-HDBK-217F
40 IMX 7-05-7
TC = 40°C
1'671'700 h
1'640'000 h
TC = 40°C
TC = 70°C
83'800 h
83'000 h
248'000 h
214'000 h
40 IMX 7-15-15-7
77'000 h
Edition 5/9.99
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MELCHER
The Power Partners.
IMX 7-Series
DC-DC Converters <40Watt
Rugged 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. 22
Case IMX 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. 23
≤4.2
Case IMX 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. 24
Case IMX 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
MELCHER
12/15
The Power Partners.
Rugged Environment
DC-DC Converters <40Watt
IMX 7 Series
Safety and Installation Instructions
Installation Instruction
Isolation
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.
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.
Connection to the system shall be made via a printed circuit
board according to: Mechanical Data.
Table 12: Electric strength test voltages
Characteristic
I/O
O/O
Unit
The units should be connected to a secondary circuit.
20/40 IMX 70 IMX 110 IMX
Check for hazardous voltages before altering any connec-
tions.
Electric strength
test voltage 1 s
1.2
1.5
1.5
2.0
2.0
2.5
0.1
kVrms
0.15 kV DC
Do not open the module.
Coupling
capacitance
≈1.2
≈1.2
≈1.2
-
-
-
nF
MΩ
kV
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.
Insulation resist.
at 500 V DC
>100
>100
>100
Input Fuse
Partial discharge
extinction voltage
Consult factory
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
20 IMX 7 and F1A for 40 IMX 7 and F0.63A for 70/110 IMX
7 types.
Table 13: Pin allocation, standard pinout
Pin
1
Single output units
Double output units
Vi+
Vi–
i
Vi+
Vi–
2
Cleaning Agents
3
i
In order to avoid possible damage, any penetration of
cleaning fluids has to be prevented, since the power sup-
plies are not hermetically sealed.
4
n.c.
Vo–
Vo+
Vo–
R
R
10
11
12
13
14
Vo1–
Vo1+
Vo2–
Vo2+
n.c.
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.
n.c./D
10011
The units have been evaluated for:
14
13
12
11
10
• Building in
1
• Supplementary insulation input to output, based on their
maximum input voltage
2
3
4
Bottom view
• 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 for 20/40
IMX 7, 2000 V for 70 IMX 7 and 2500 V for 110 IMX 7
types.
Fig. 25
Pin allocation standard pinout
Table 14: Pin allocation for C-pinout (option C)
The DC-DC converters are subject to manufacturing sur-
veillance in accordance with the above mentioned UL,
CSA, EN and ISO 9001 standards.
Pin
1
Single output units
Dual output units
Vi+
Vi–
Vi+
Vi–
Vo+
Go
Protection Degree
2
The protection degree of the DC-DC converters is IP 30.
3
Vo+
4
no pin
Vo–
5
Vo–
10012
3
4
5
1
2
Fig. 26
Pin allocation C pinout, bottom view
Edition 5/9.99
13/15
MELCHER
The Power Partners.
IMX 7-Series
DC-DC Converters <40Watt
Rugged Environment
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.
cuit according to IEC/EN 60950 up to a configured output
voltage (sum of nominal voltages if in series or +/– configu-
ration) of 46 V.
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-
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.
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
Fig. 27
end
verter
–
~
Schematic safety concept. Use fuse, suppressor diode
and earth connection as per table: Safety concept leading
to an SELV output circuit.
Earth
connection
Earth
connection
Description of Options
Table 16: Survey of options
Option
Function
Characteristics
-8
-9
Operational temperature range TA = –40...85°C
Operational temperature range TA = –40...71°C
Signal Out OK
Extended temperature range. Excludes option D.
Extended temperature range
D
Available for single output units. Excludes option -8.
Excludes option C.
M
Surface mount version, SMD
C-pinout
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 -8
Extension of the temperature range from standard
–25...71°C to –40...85°C. The modules will provide full out-
put power with free air convection cooling. UL recognition
up to 80°C. This option excludes option D.
Edition 5/9.99
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MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters <40Watt
IMX 7 Series
Option M
Option C
Surface mount version.
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).
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.
Option C2
The C2-pinout configures the electrically isolated double
outputs to one strong single output.
Infrared soldering is not permitted.
Option C and C2 exclude option M, the inhibit function as
well as the R-function.
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.
Option D
Single output units can be provided with an Out OK func-
tion. The D-output is an open collector transistor output ref-
erenced to Vo– and indicates that the output voltage is
above approximately 90% of the specified nominal output
voltage. It can for example be used for remote signalling or
to prevent a connected system from starting up at a low out-
put voltage. The current ID through the NPN transistor
should not exceed 20 mA. The NPN output is not protected
against external overvoltages. UD should not exceed 25 V.
Option D excludes option -8.
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
Table 17: Out OK characteristics
225
220
215
210
Out OK
characteristics
3.3 V units 5.1 V units Unit
Uo Uo
min max min max
UD low
UD high
Uo Hyst
D output conducting
≥3.0 ≥4.75
V
D output disabled
Hysteresis
≤2.85
≤4.5
30 (typical)
t [s]
205
mV
50
0
20
30
40
10
tD on delay Transistor on delay 140 560 140 560 ms
Fig. 30
tD off delay Transistor off delay
100
100 µs
Forced convection reflow soldering restriction curve
measured on pin 2
11031
Vo+
11
09119
4
Rp
ID
14
10
D
Output
control
circuit
Top view
50
UD
Vo–
Fig. 31
Proposed solder lands
Fig. 28
Option D, Out OK
11032
Uo [V]
UD low
UD high
Uo Hyst
Output
voltage
t
Out OK
tr on
tD off delay
tD on delay
Fig. 29
Out OK signal with corresponding transistor status
Edition 5/9.99
15/15
MELCHER
The Power Partners.
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Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
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