70IMX35D05D12-8 [BEL]

DC-DC Regulated Power Supply Module, 4 Output, 35W, Hybrid, 3 X 2.500 INCH, 10.50 MM HEIGHT, MA-17;
70IMX35D05D12-8
型号: 70IMX35D05D12-8
厂家: BEL FUSE INC.    BEL FUSE INC.
描述:

DC-DC Regulated Power Supply Module, 4 Output, 35W, Hybrid, 3 X 2.500 INCH, 10.50 MM HEIGHT, MA-17

输出元件
文件: 总15页 (文件大小:1622K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Features  
RoHS lead-free-solder and lead-solder-exempted  
products are available.  
• Extremely wide input voltage ranges up to 150 VDC  
• 4 outputs up to 60 V  
• 1500 to 1800 VAC i/o electric strength test  
• Electrical isolation between outputs  
• Programmable input undervoltage lockout  
• Shutdown/inhibit input  
10.5  
0.41"  
63.5  
2.5"  
76.2  
3"  
• Adjustable output voltages with flexible load distribution  
• Frequency synchronization  
• Outputs no-load, overload, and short-circuit proof  
• Operating ambient temperature from 40 to 85 °C  
• Thermal protection  
• Low profile: 10.5 mm or 8.9 mm with open frame  
• Basic insulation  
• Flexible output possibilities between 5 V and 60 V  
8.9  
0.35"  
47.8  
1.88"  
Safety-approved to IEC/EN 60950-1 and UL/CSA  
60950-1 2nd Ed.  
72.8  
2.87"  
Description  
The IMX35 Series of board-mountable, 35 Watt DC-DC  
converters has been designed according to the latest industry  
requirements and standards. The converters are particularly  
suitable for use in mobile or stationary applications in  
transport, railways, industry, or telecommunication, where  
variable input voltages or high transient voltages are  
prevalent.  
approved by CSA. The converters provide basic insulation.  
The circuit is comprised of 2 planar magnetics devices, and all  
components are automatically assembled and securly  
soldered onto a single PCB without any wire connection.  
Magnetic feedback ensures maximum reliability and  
repeatability in the control loop over all operating conditions.  
Careful considerations of possible thermal stresses ensure the  
absence of hot spots providing long life in environments, where  
temperature cycles are present. The thermal design without  
using any potting material allows operation at full load up to an  
ambient temperature of 71°C in free air and operation up to  
105 °C with airflow. For extremely high vibration environments  
the case has holes for screw mounting.  
Covering a total input voltage range from 9 V up to 150 V with  
4 different models, the converters are available with up to four  
electrically isolated outputs from 5 V to 60 V, externally  
adjustable and with flexible load distribution. A shutdown input  
allows remote converter on/off. Features include consistently  
high efficiency over the entire input voltage range, high  
reliability, and excellent dynamic response to load and line  
changes.  
The converters are designed and built according to the  
international safety standards IEC/EN/UL 60950, and  
Table of Contents  
Page  
Page  
Description ............................................................................. 1  
Model Selection ..................................................................... 2  
Functional Description ........................................................... 3  
Electrical Input Data............................................................... 4  
Electrical Output Data ............................................................ 6  
Auxiliary Functions ................................................................. 9  
Electromagnetic Compatibility (EMC) .................................. 11  
Immunity to Environmental Conditions ................................ 12  
Mechanical Data .................................................................. 13  
Safety and Installation Instructions ...................................... 14  
Options................................................................................. 15  
Copyright © 2015, Bel Power Solutions Inc. All rights reserved.  
MELCHER  
The Power Partners.  
BCD20009-G Rev AD, 10-Aug-2015  
Page 1 of 15  
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Model Selection  
Table 1: Model Selection  
Output 1  
Vo nom Io nom  
Output 2  
Output 3  
Output 4 Input voltage  
Io nom Vo nom Io nom Vi min to Vi max  
Efficiency 1  
Model  
ηtyp  
[%]  
Opt.  
Vo nom  
Io nom Vo nom  
ηmin  
[%]  
[V]  
[A]  
[V]  
[A]  
[V]  
[A]  
[V]  
[A]  
[V]  
5
5
5
5
1.35  
1.4  
1.4  
1.4  
5
5
5
5
1.35  
1.4  
1.4  
1.4  
5
5
5
5
1.35  
1.4  
1.4  
1.4  
5
5
5
5
1.35  
1.4  
1.4  
1.4  
9 to 36  
18 to 75  
40 to 121  
60 to 1502  
82.5  
82  
83  
86  
87  
86  
86  
20IMX35D05D05-8  
40IMX35D05D05-8  
70IMX35D05D05-8  
110IMX35D05D05-8  
i
Z
G
82  
12  
12  
12  
12  
0.65  
0.7  
0.7  
12  
12  
12  
12  
0.65  
0.7  
0.7  
12  
12  
12  
12  
0.65  
0.7  
0.7  
12  
12  
12  
12  
0.65  
0.7  
0.7  
9 to 36  
18 to 75  
40 to 121  
60 to 1502  
83.7  
83.7  
84.5  
84  
86  
88  
88  
88  
20IMX35D12D12-8  
40IMX35D12D12-8  
70IMX35D12D12-8  
110IMX35D12D12-8  
0.7  
0.7  
0.7  
0.7  
15  
15  
15  
15  
0.55  
0.6  
0.6  
15  
15  
15  
15  
0.55  
0.6  
0.6  
15  
15  
15  
15  
0.55  
0.6  
0.6  
15  
15  
15  
15  
0.55  
0.6  
0.6  
9 to 36  
18 to 75  
40 to 121  
60 to 1502  
85  
83.6  
84  
88  
89  
88  
88  
20IMX35D15D15-8  
40IMX35D15D15-8  
70IMX35D15D15-8  
110IMX35D15D15-8  
0.6  
0.6  
0.6  
0.6  
83  
5
5
5
5
1.35  
1.4  
1.4  
12  
12  
12  
12  
0.65  
0.7  
0.7  
12  
12  
12  
12  
0.65  
0.7  
0.7  
5
5
5
5
1.35  
1.4  
1.4  
9 to 36  
18 to 75  
40 to 121  
60 to 1502  
84  
84  
84  
88  
89  
88  
88  
20IMX35D05D12-8  
40IMX35D05D12-8  
70IMX35D05D12-8  
110IMX35D05D12-8  
1.4  
0.7  
0.7  
1.4  
83.6  
5
5
5
5
1.35  
1.4  
1.4  
15  
15  
15  
15  
0.55  
0.6  
0.6  
15  
15  
15  
15  
0.55  
0.6  
0.6  
5
5
5
5
1.35  
1.4  
1.4  
9 to 36  
18 to 75  
40 to 121  
60 to 1502  
84  
83.5  
84  
86  
89  
88  
88  
20IMX35D05D15-8  
40IMX35D05D15-8  
70IMX35D05D15-8  
110IMX35D05D15-8  
1.4  
0.6  
0.6  
1.4  
84  
1
2
Efficiency at TA = 25 °C, Vo nom, Io nom  
154 V for 2 s.  
Part Number Description  
40 IMX35 D05 D05 -8 i Z G  
Input voltage range Vi  
9 to 36 VDC ........................................... 20  
18 to 75 VDC ........................................... 40  
40 to 121 VDC ........................................... 70  
60 to 150 VDC ......................................... 110  
Series ....................................................................... IMX35  
Outputs 1 and 4 (1st power train) ............... D05, D12, D15  
Outputs 2 and 3 (2nd power train) .............. D05, D12, D15  
Operating ambient temperature range  
TA = 40 to 85 °C...................................... -8  
Options:  
Inhibit ........................................................... -i  
Open frame.................................................. Z  
RoHS compliant for all six substances ......... G  
Note: The sequence of options must follow the order above!  
Preferred for new designs  
Product Marking  
Converters without option Z are marked with type designation,  
input and output voltages and currents, applicable safety  
approval and recognition marks, company logo, production  
date, and serial no.  
MELCHER  
The Power Partners.  
BCD20009-G Rev AD, 10-Aug-2015  
Page 2 of 15  
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
voltage (e.g. D12D12), all outputs may be simultaneously  
adjusted by the Trim input (pin 5). In case of different output  
voltages (e.g. D05D15), the Trim1 input influences only Vo1  
and Vo4.  
Functional Description  
The IMX35 converters are comprised of 2 feedback-controlled  
interleaved-switching flyback powertrains using current mode  
PWM (pulse width modulation).  
Current limitation is provided by the primary circuit for each  
powertrain and limits the possible output power for each pair of  
outputs. In the case of an overload on either of the power  
trains, which causes the output voltage to fall less than typically  
Each converter consists of 4 electrically isolated outputs  
deriving from 2 power trains. Vo1, Vo4 derive from the first  
powertrain and Vo2, Vo3 from the second one. Thus each pair  
of outputs is independent from the other one.  
60% of V nom, the entire converter will shut down and  
o
automatically restart in short intervals (hiccup mode).  
Voltage regulation for each pair of outputs is achieved with  
passive transformer feedback from the main transformer of the  
powertrain. Each pair of outputs has the same output voltage  
(i.e. D05, D12, etc.). If both powertrains have the same output  
The incorporated overtemperature protection shuts down the  
converter in excessive overtemperature conditions with  
automatic restart.  
03098a  
Vi+  
4
16  
15  
Vo1+  
Vo1–  
1
5
6
7
8
2
3
PUL  
Trim/Trim1  
17 Vo4+  
18 Vo4–  
13 Vo2+  
PWM  
W
Ref  
SD  
Vi–  
n.c.  
14  
12  
Vo2–  
Vo3+  
11 Vo3–  
19 n.c.  
Fig. 1  
Block diagram of quad-output models  
MELCHER  
The Power Partners.  
BCD20009-G Rev AD, 10-Aug-2015  
Page 3 of 15  
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Electrical Input Data  
General conditions:  
TA = 25 °C, unless specified  
Pins 8 (shutdown or i), 6 (W), 5 (Trim or Trim1), and 1 (PUL) left open-circuit (not connected), unless specified.  
Table 2: Input Data  
Input  
20IMX35  
40IMX35  
Unit  
Characteristics  
Conditions  
min  
9 2  
typ  
max  
36  
min  
18 2  
typ  
max  
75  
Vi  
Input voltage range 1  
TA min to TA max  
Io = 0 to Io nom  
VDC  
Vi nom  
Vi sur  
tstart-up  
Nominal input voltage  
20  
40  
Repetitive surge voltage  
Abs. max input (3 s)  
40  
0.5  
0.1  
100  
0.5  
0.1  
Converter  
start-up time 2  
Switch on  
S¯¯D high  
Worst case condition at  
Vi min and full load  
0.25  
0.25  
s
trise  
Rise time 3  
Vi nom resist load  
3
6
3
6
ms  
Io nom capac. load  
12  
70  
30  
8
12  
50  
30  
9
Ii o  
Iirr  
No load input current  
Reflected ripple current  
Inrush peak current 4  
Input capacitance  
Io = 0, Vi min to Vi max  
Io = 0 to Io nom  
mA  
mApp  
A
Iinr p  
Ci  
Vi = Vi nom  
for surge calculation  
Converter disabled  
Converter operating  
2
1.3  
µF  
––  
VSD  
Shut down voltage  
–10 to 0.7  
–10 to 0.7  
V
open circuit or 2 to 20  
open circuit or 2 to 20  
––  
RSD  
Shutdown input resistance  
approx. 10  
12  
approx. 10  
6
k Ω  
mA  
kHz  
––  
ISD  
Inputcurrentduringshutdown Vi min to Vi max  
Switching frequency Vi min to Vi max, Io = 0 to Io nom  
fs  
220  
240  
220  
240  
Input  
70IMX35  
110IMX35  
Unit  
Characteristics  
Conditions  
min  
40 2  
typ  
max  
121  
min  
602  
typ  
110  
0.4  
max  
Vi  
Input voltage range 1  
TA min to TA max  
Io = 0 to Io nom  
1505  
VDC  
Vi nom  
Vi sur  
tstart-up  
Nominal input voltage  
70  
Repetitive surge voltage  
Abs. max input (3 s)  
150  
0.5  
0.1  
170  
0.7  
0.1  
Converter  
start-up time 2  
Switch on  
S¯D¯ high  
Worst case condition at  
Vi min and full load  
0.25  
s
trise  
Rise time 3  
Vi nom resist load  
Io nom capac. load  
Io = 0, Vi min to Vi max  
Io = 0 to Io nom  
3
6
3
6
ms  
12  
30  
30  
7
12  
20  
30  
7
Ii o  
Iirr  
No load input current  
Reflected ripple current  
Inrush peak current 4  
Input capacitance  
mA  
mApp  
A
Iinr p  
Ci  
Vi = Vi nom  
for surge calculation  
Converter disabled  
Converter operating  
0.5  
0.5  
µF  
––  
VSD  
Shut down voltage  
–10 to 0.7  
–10 to 0.7  
V
open circuit or 2 to 20  
open circuit or 2 to 20  
––  
RSD  
Shutdown input resistance  
approx. 10  
5
approx. 10  
kΩ  
mA  
kHz  
––  
ISD  
Inputcurrentduringshutdown Vi min to Vi max  
Switching frequency Vi min to Vi max, Io = 0 to Io nom  
5
fs  
220  
240  
225 6  
3
4
5
6
1
Measured with resistive and max. admissible capacitive load.  
Source impedance according to ETS 300132-2, version 4.3.  
154 V during 2 s  
Vi min will not be as stated, if Vo is increased above Vo nom by  
use of Trim input. If the output voltage is set to a higher value,  
Vi min will be proportionately increased.  
2
Revision BA or later. Older converters had fs 240 kHz.  
Input undervoltage lockout at typ. 85% of Vi min  
.
MELCHER  
The Power Partners.  
BCD20009-G Rev AD, 10-Aug-2015  
Page 4 of 15  
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Inrush Current  
Input Transient Voltage Protection  
The inrush current has been kept as low as possible by  
choosing a very small input capacitance. A series resistor may  
be installed in the input line in order to further reduce this  
current.  
A built-in suppressor diode provides effective protection against  
input transients, which may be generated for example by short-  
circuits across the input lines, where the network inductance  
may cause high energy pulses.  
Table 4: Built-in transient voltage suppressor  
A
04022b  
Model  
Breakdown  
voltage  
VBr nom [V]  
Peak power  
at 1 ms  
Peak pulse  
current  
Ipp [A]  
4
3
2
Pp []  
20IMX35  
40IMX35  
70IMX35  
110IMX35  
39  
1500  
1500  
600  
22  
9.7  
2.9  
2.5  
100  
151  
176  
1
t
100 µs  
0
20  
60  
80  
40  
600  
Fig. 2  
Typical inrush current at Vi nom, Po nom versus time (40IMX35).  
For very high energy transients as for example to achieve  
IEC/EN 61000-4-5 compliance (as per table Electromagnetic  
Immunity) an external inductor and capacitor are required. The  
components should have similar characteristics as listed in  
table below.  
Source impedance according to ETS 300132-2 at Vi nom  
.
Vo  
trise  
04008b  
Vo nom  
Table 5: Components for external circuitry for IEC/EN  
61000-4-5, level 2  
Model  
Inductor (L)  
22 µH /5 A  
Capacitor (C)  
470 µF /40 V  
Diode (D)  
t
20IMX35  
40IMX35  
70IMX35  
110IMX35  
1.5 k E47A  
tstartup  
68 µH /2.7 A  
100 µH /1 A  
150 µH /0.8 A  
2 x 100 µF /100 V  
2 x 82 µF /200 V  
2 x 82 µF /200 V  
-
-
-
Fig. 3  
Converter start-up and rise time (see table 2)  
04036a  
L
Reverse Polarity Protection  
Vi+  
Vi–  
The built-in suppressor diode also provides for reverse polarity  
protection at the input by conducting current in the reverse  
direction. An external fuse is required to limit this current.  
+
C
D
Table 3: Recommended external fuses in the non-earthed  
input line  
Converter model  
20IMX35  
Fuse type  
F8.0A  
Fig. 4  
Example for external circuitry to comply with IEC/EN 61000-  
4-5; the diode D is only necessary for 20IMX35 models.  
40IMX35  
F4.0A  
70IMX35  
F2.0A  
110IMX35  
F1.5A  
MELCHER  
The Power Partners.  
BCD20009-G Rev AD, 10-Aug-2015  
Page 5 of 15  
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Electrical Output Data  
General conditions:  
– TA = 25 °C, unless TC is specified  
– Pins 8 (shutdown or i), 6 (W), 5 (Trim or Trim1), and 1 (PUL) left open-circuit (not connected), unless specified.  
Table 6: Output data per double-output powertrain (Vo1/Vo4 or Vo2/Vo3; each power train has 2 outputs)  
Output  
2 x 5 V  
2 x 12 V  
typ  
2 x 15 V  
Unit  
Characteristics  
Conditions  
min typ  
max  
min  
max  
min  
typ max  
Vo1  
Vo2  
Output voltage  
Vi nom  
Io = 0.5 Io nom  
4.95  
4.94  
5.05  
5.06  
11.88  
11.86  
12.12  
12.14  
14.85  
14.82  
15.15  
15.18  
VDC  
A
Io nom Output current  
20IMX Vi min to Vi max  
40IMX  
2 × 1.35  
2 × 1.4  
2 × 1.4  
2 × 1.4  
3.5  
2 × 0.65  
2 × 0.70  
2 × 0.70  
2 × 0.70  
1.8  
2 × 0.55  
2 × 0.60  
2 × 0.60  
2 × 0.60  
1.5  
70IMX  
110IMX  
IoL  
Current limit1  
20IMX Vi nom, TC = 25 °C  
Vo = 93% Vo nom  
40IMX  
3.8  
3.8  
3.8  
2.0  
2.0  
2.0  
1.7  
1.7  
1.7  
70IMX  
110IMX  
Vo  
Line regulation  
Load regulation  
Vi min to Vi max, Io nom  
±1  
±3  
±1  
±3  
±1  
±3  
%
Vo l  
Vi nom  
Io = (0.1 to 1) Io nom  
2
Vo1/2  
Output voltage noise 5  
Vi min to Vi max  
Io = Io nom  
80  
40  
120  
60  
150  
70  
mVpp  
3
Vo L  
Output overvoltage limit 4  
Min. load 1%  
115  
130  
115  
130  
115  
130  
%
Co ext Admissible capacitive load  
produced after 2011  
produced until 2011  
0
0
6000  
4000  
0
0
680  
470  
0
0
470  
330  
µF  
per power train 6  
Vo d  
td  
Dynamic  
Voltage deviat. Vi nom  
±250  
0.75  
±480  
0.75  
±520  
0.75  
mV  
ms  
1
load  
regulation  
Io nom /  
2
Io nom  
Recovery time  
αVo  
Temperature coefficient  
Vo/TC  
Vi min to Vi max  
Io = (0.1 to 1) Io nom  
±0.02  
±0.02  
±0.02  
%/K  
1
Both outputs of each powertrain connected in parallel. The current limit is primary side controlled. In the event of a sustained overload  
condition, the thermal protection may cause the converter to shut down (restart on cool-down).  
BW = 20 MHz, measured with an external capacitor of 1 µF across the output pins.  
Measured with a probe according to EN 61204  
The overvoltage protection is via a primary side second regulation loop, not tracking with Trim control.  
Both outputs of each powertrain connected in parallel.  
2
3
4
5
6
Sum of capacities on the outputs of each control powertrain.  
MELCHER  
The Power Partners.  
BCD20009-G Rev AD, 10-Aug-2015  
Page 6 of 15  
IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Vo [%]  
Thermal Considerations  
overload short-circuit condition  
If a converter, mounted on a PCB, is located in free, quasi-  
stationary air (convection cooling) at the indicated maximum  
ambient temperature TA max (see table Temperature specifi-  
cations) and is operated at its nominal input voltage and output  
power, the case temperature TC (TC Z with option Z) measured  
at the measuring point of case temperature (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 integration  
into a system. The thermal conditions are influenced by input  
voltage, output current, airflow, temperature of surrounding  
components and the surfaces and properties of the printed  
circuit board. TA max is therefore only an indicative value, and  
under practical operating conditions, the ambient temperature  
TA may be higher or lower than this value.  
100  
switch-off  
05041b  
70  
t
0
0.3 s  
Fig. 6  
Overload switch off (hiccup mode), typical values.  
Series and Parallel Connection  
The outputs of one or several double-output powertrains may  
be connected in series respecting the current limitation.  
Caution: The case temperature TC (or TC Z) measured at the  
measuring point of case temperature (see Mechanical Data) may  
under no circumstances exceed the specified maximum value.  
The installer must ensure that under all operating conditions TC (or  
TC Z) remains within the limits stated in the table Temperature  
specifications.  
Both outputs of the same powertrain can always be connected  
in parallel in will behave like a single output.  
Several outputs of the same converter with equal output  
voltage (e.g. 5 V / 5 V) can be connected in parallel and will  
share their output currents almost equally.  
The converters provide the specified output power with free air  
convection cooling. In the upper temperature range the output  
power derating below should be observed.  
If outputs of the same converter are being parallel and series-  
connected, it is recommended that outputs from the same  
powertrains are parallel-connected first. This applies for  
instance, if 24 V shall be generated by a converter with four  
12 V outputs; see fig. 7.  
Po/Po max  
11047-X35a  
JM138  
1.0  
0.8  
IMX35D12D12-9  
Vo1+  
16  
Vi+  
4
0.5 m/s  
= 100 LFM  
0.6  
1
5
6
7
8
2
3
PUL  
Vo1–  
Vo4+  
natural cooling  
15  
17  
0.4  
0.2  
0
Trim  
W
PWM  
Ref  
Vo4–  
Vo2+  
–24V  
+24V  
18  
13  
TA  
SD  
Vi–  
n.c.  
20  
40  
60  
80  
100  
°C  
Fig. 5  
Maximum allowed output power versus ambient  
temperature (models without option Z)  
Vo2–  
Vo3+  
14  
12  
Overtemperature Protection  
Vo3–  
11  
The converter is protected against possible overheating by  
means of an internal temperature monitoring circuit. It shuts  
down the converter above the internal temperature limit and  
attempts to automatically restart. This feature prevents  
excessive internal temperature building up which could occur  
under heavy overload conditions.  
19 n.c.  
Fig. 7  
Generating 24 V with an IMX35D12D12-9  
Note: Parallel operation of several converters may cause start-up  
problems. This becomes noticable in applications, where one  
converter is not able to deliver alone the full resistive and  
capacitive load current, as it is required in true redundant systems.  
Short Circuit Behavior  
The current limit characteristic shuts down the converter  
whenever a short circuit is applied to an output. It acts self-  
protecting and automatically recovers after removal of the  
overload condition (hiccup mode).  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
η [%]  
Typical Performance Curves  
05153a  
90  
General conditions:  
– TA = 25°C, unless TC is specified.  
– Shut down and Trim pin left open-circuit.  
Vi min  
80  
Vi nom  
Vo [V]  
05020-X35  
13  
12  
11  
10  
9
70  
Po  
100 % Po total  
60  
25  
50  
75  
Fig. 11  
8
Efficiency versus input voltage and load. Typical values  
(20IMX35D12D12-8)  
Io total  
0
0.5  
1
1.5  
2
A
Fig. 8  
Vo versus Io (typ.) of double-output power trains, with both  
outputs in parallel (e.g., Vo1/4 of a 40IMX35D12D12)  
η [%]  
05152a  
90  
Vi min  
Vi nom  
Vo4 [V]  
80  
70  
05164b  
13.5  
13  
Io4 = 0.035 A  
12.5  
12  
Po  
100 % Po total  
60  
25  
Io4 = 0.35 A  
50  
75  
11.5  
Io1  
Fig. 12  
0.06  
0.2  
0.3  
0.5  
0.6  
0.7 A  
0.1  
0.4  
Efficiency versus input voltage and load. Typical values  
(40IMX35D12D12-8)  
Fig. 9  
Cross load regulation (typ.) on powertrain 1. Vo4 versus Io1  
Vo1, Vo4 [V]  
05039b  
14  
13  
12  
11  
10  
Vo4  
Vo1  
Io1/Io1 nom  
0.5  
0.75  
1
1.25  
1.5  
0
0.25  
Fig. 10  
Flexible load distribution (typ.) on power train 1 of a  
40IMX35D12D12-8:  
Vo1 versus Io1, Io4 = 0.5 Io4 nom  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Table 8: Vo versus Vext for Vo = 85 to 105% Vo nom  
;
Auxiliary Functions  
typical values (Vi nom, Io = 0.5 Io nom  
)
Adjustable Output Voltage  
Vo [% Vo nom  
]
Vext [V]  
As a standard feature, the IMX35 offer adjustable output  
voltages in the range of 85 to 105% of Vo nom. Fig. 12 shows the  
schematic diagram for the adjustment of quad-output models.  
Trim [V]  
Trim1 [V]  
>105  
102  
100  
95  
90  
85  
0
0
1.5  
2.5  
4.25  
6.2  
8
1.8  
2.5  
4.3  
6.2  
8
All models with equal output voltages have a Trim input at pin 5  
referenced to the primary side, influencing all outputs simul-  
taneously. Models with different output voltages exhibit a Trim1  
input, influencing only the first power train (Vo1 and Vo4).  
Adjustment by means of an external resistor Rext  
:
Synchronization (W)  
06137c  
It is possible to synchronize the switching frequency of one or  
more converters to an external clock signal.  
Vi+  
Vo1+  
Vo1–  
Vo2+  
16  
4
5
Trim  
This logic input W can be used to synchronize the oscillator to  
an external frequency source. This signal is edge-triggered  
with TTL thresholds and requires a source frequency of 490 to  
540 kHz (duty cycle 10 to 90%). The external source frequency  
is internally divided by 2 to define the switching frequency of  
the converter. If unused, this pin can be connected to V1– (pin  
2) or left open-circuit.  
15  
13  
+
Control  
circuit  
Vref = 2.5 V  
Vext  
Rext  
Vi–  
Vo2–  
2
14  
Fig. 13  
Reference Output (Ref)  
Output voltage control by means of the Trim input  
The converter provides a stable 5 V (±0.1 V) reference signal  
on pin 7 (Ref). The output is protected by a 1 kresistor. The  
signal may be used also in conjunction with the Trim input (pin  
5) as a limited external voltage reference.  
Adjustment of the output voltage by means of an external  
resistor Rext is possible within the range of 100 to 105% of  
Vo nom. Rext should be connected between Trim (pin 5) and Vi–  
(pin 2). The following table indicates suitable resistor values for  
typical output voltages under nominal conditions (Vi nom, Io =  
0.5 Io nom).  
It is recommended to connect a filter capacitor (0.1 µF)  
between Ref and Vi–, if Ref is used.  
Shutdown  
Note: Connection of Rext to Vi+ may damage the converter.  
The outputs of the converters may be enabled or disabled by  
means of a logic signal (TTL, CMOS, etc.) applied to shutdown  
(pin 8). If the shutdown function is not required, pin 8 should be  
left open-circuit:  
Table 7: Rext for Vo > Vo nom  
approximate values (Vi nom, Io = 0.5 Io nom  
;
)
Vo [% Vo nom  
]
Rext [k]  
Converter operating:  
Converter disabled:  
2.0 to 20 V  
Trim  
Trim1  
–10 to 0.7 V  
105 to 108 (107 typically)  
0
0
17  
110  
105  
102  
100  
10  
62  
Adjustment by means of an external voltage source Vext  
For external output voltage adjustment in the range 85 to 105%  
of Vo nom a voltage source Vext (0 to 20 V) is required, connected  
to Trim or Trim1 (pin 5) and Vi–. The table below indicates  
typical values Vo versus Vext. Applying a control voltage of 15 to  
20 V will set the converter into the hiccup mode. Direct  
paralleling of the Trim pins of converters of the same type  
connected in parallel is feasible.  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Progr. Input Undervoltage Lockout PUL  
A special feature of the converters (with Rev. BA or later) is the  
adjustable undervoltage lockout protection, which protects the  
converter (and the system) from high current caused by  
operation at low input voltages. This ensures easier start-up in  
distributed power systems.  
The table below shows the band of switch on/off and the  
hysteresis.  
Table 9: Trigger level and hysteresis (pin 1 left open)  
Model  
Trigger level  
7 to 8  
Hysteresis  
Unit  
20IMX35  
40IMX35  
70IMX35  
110IMX35  
<0.5  
<1  
V
14 to 15.5  
31 to 34  
<3  
42 to 50  
<8  
The undervoltage lockout levels may be programmed by using  
an external resistor RPUL between PUL and Vito increase the  
preset levels as specified in table 10.  
Table 10: Typical values for RPUL and the respective lockout  
voltage for input voltage.  
20IMX35  
40IMX35  
RPUL [kW]  
Vi min [V]  
RPUL [kW]  
Vi min [V]  
39  
19  
13  
9.1  
8  
10  
12  
14  
16  
43  
16  
10  
0
15.5  
22  
26  
28  
32  
70IMX35  
110IMX35  
RPUL [kW]  
Vi min [V]  
RPUL [kW]  
Vi min [V]  
31  
40  
50  
55  
42  
50  
60  
75  
270  
110  
80  
270  
120  
51  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
effective protection against high input transient voltages which  
typically occur in many installations, but especially in battery-  
driven mobile applications.  
Electromagnetic Compatibility (EMC)  
A suppressor diode together with an input filter form an  
Electromagnetic Immunity  
Table 11: Immunity type tests  
Phenomenon  
Standard  
Class  
Level  
Coupling  
mode1  
Value  
applied  
Waveform  
Source  
imped.  
Test  
procedure  
In  
Perf-  
oper. crit.2  
Electrostatic  
discharge  
to case  
IEC/EN  
61000-4-2  
2
contact discharge  
(Trim pin open)  
4000 Vp  
8000 Vp  
10 V/m  
10 V/m  
1/50 ns  
330 Ω  
10 positive and  
10 negative  
discharges  
yes  
B
3
air discharge  
(Trim pin open)  
Electromagnetic IEC/EN  
field  
3 3  
3
antenna  
AM 80%  
1 kHz  
n.a.  
n.a.  
80 to 1000 MHz  
900 MHz  
yes  
yes  
A
A
61000-4-3  
ENV 50204  
antenna  
PM, 50% duty  
cycle, 200 Hz  
repetition frequ.  
Electrical fast  
transients/burst  
IEC/EN  
61000-4-4  
4
direct +i/–i  
±4000 Vp burstsof 5/50ns  
2.5/5 kHz  
50 Ω  
60 s positive,  
60 s negative  
transients per  
coupling mode  
yes  
B
over 15 ms,  
burst period  
300 ms  
Surges  
IEC/EN  
61000-4-5  
34  
+i/–i  
±2000 Vp  
1.2/50 µs  
2 Ω  
5 pos. and 5 neg.  
surges  
yes  
B
EN 50155:  
2001  
A 5  
B 6  
3
+i/c, i/c  
+i/c, i/c  
+i/–i  
±1800 Vp  
8400 Vp  
5/50 µs  
100 Ω  
100 Ω  
50 Ω  
yes  
yes  
yes  
B
B
A
0.05/0.1 µs  
RF Conducted  
immunity  
IEC/EN  
61000-4-6  
10 VAC  
(140 dBµV)  
AM modulated  
80%, 1 kHz  
0.15 to 80 MHz  
150 Ω  
1
i = input, o = output, c = case (not with option Z)  
2
3
4
5
6
A = normal operation, no deviation from specification, B = temporary deviation from specs. possible.  
Corresponds to EN 50121-3-2:2000, table 9.1  
External components required; see fig. 4  
Corresponds to EN 50155:1995, waveform D  
Corresponds to EN 50155:1995, waveform G  
Electromagnetic Emissions  
PMM 8000 PLUS: Peak, conducted Vi+, QP  
+ AV, 2006-10-01, 2x 1.1 mH,  
dBµV  
110IMX35D05D12,  
U
=110 V,  
U
=U =5 V,  
I
=U =1.4 A,  
U
=U =12  
V
I
=U =0.6 A  
i
o1 o4  
o1 o4  
o2 o3  
o2 o3  
JM072  
80  
EN 55022 A QP  
EN 55022 A AV  
60  
40  
20  
0
0.2  
0.5  
1
2
5
10  
20 MHz  
Fig. 14  
Typ. disturbances (quasi-peak and average) at the input  
according to EN 55011/22, measured at Vi nom and Io nom  
(110IMX35D05D12-8 with input choke 2× 1.1 mH).  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Conducted emission according to EN 55011/55022, class A,  
can be achieved by adding an external common mode choke  
and an additional ceramic capacitor. The filter components  
should be placed as close as possible to the input of the  
converter; see figure 15.  
07114c  
Vi+  
Li  
+
Converter  
Ci  
Table 12: Input filter components  
Vi–  
Model  
Common mode choke  
Ceramic cap  
L1 (Murata)  
C1  
20IMX35  
40IMX35  
70IMX35  
110IMX35  
70 µH / 3.6 A, PLH10AN7003R6P2  
160 µH / 2.1 A, PLH10AN1612R1P2 2.2 µF / 100 V  
290 µH / 1.2 A, PLH10AN2911R2P2  
370 µH / 1.0 A, PLH10AN3711R0P2  
4.7 µF / 50 V  
Fig. 15  
1 µF / 200 V  
1 µF / 200 V  
External filter circuitry  
Immunity to Environmental Conditions  
Table 13: Mechanical and climatic stress  
Test method  
Standard  
Test conditions  
Status  
Cab  
Damp heat  
steady state  
IEC/EN 60068-2-78  
MIL-STD-810D section 507.2  
Temperature:  
Relative humidity:  
Duration:  
40 ±2 °C  
Converter  
not  
operating  
93 +2/-3  
%
56 days  
--  
Salt mist test  
sodium chloride  
(NaCl) solution 2  
EN 50155:2007  
sect. 12.2.10  
class ST3 2  
Temperature:  
Duration:  
35±2 °C  
48 h  
Converter  
not  
operating  
Eb  
Fc  
Bump  
(half-sinusoidal)  
IEC/EN 60068-2-29  
MIL-STD-810D section 516.3  
Acceleration amplitude:  
Bump duration:  
Number of bumps:  
25 gn = 245 m/s2  
6 ms  
6000 (1000 in each direction)  
Converter  
operating  
Vibration  
(sinusoidal)  
IEC/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)  
10 – 2000 Hz  
Converter  
operating  
Frequency (1 Oct/min):  
Test duration:  
7.5 h (2.5 h in each axis)  
Fh  
Random vibration  
broad-band  
(digital control) and  
guidance  
IEC/EN 60068-2-64  
Acceleration spectral density: 0.05 gn2/Hz  
Converter  
operating  
Frequency band:  
Acceleration magnitude:  
Test duration:  
8 – 500 Hz  
4.9 grms  
1.5 h (0.5 h in each axis)  
Ea  
--  
Shock  
(half-sinusoidal)  
IEC/EN 60068-2-27  
MIL-STD-810D section 516.3  
Acceleration amplitude:  
Bump duration:  
Number of bumps:  
50 gn = 490 m/s2  
11 ms  
18 (3 in each direction)  
Converter  
operating  
Shock  
EN 50155:2007 sect. 12.2.11  
EN 61373 sect. 10, class B,  
body mounted1  
Acceleration amplitude:  
Bump duration:  
Number of bumps:  
5.1 gn  
30 ms  
18 (3 in each direction)  
Converter  
operating  
--  
Simulated long life EN 50155:2007 sect. 12.2.11  
Acceleration spectral density: 0.02 gn2/Hz  
Converter  
operating  
testing at  
EN 61373 sect. 8 and 9,  
Body mounted1  
Frequency band:  
Acceleration magnitude:  
Test duration:  
5 – 150 Hz  
0.8 gn rms  
15 h (5 h in each axis)  
increased random  
vibration levels  
1
Body mounted = chassis of a railway coach  
Models without option Z  
2
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Temperatures  
Table 14: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar)  
Temperature  
-8  
Unit  
Characteristics  
Conditions  
Operational 1  
min  
40 3  
–40 3  
–40 3  
55  
max  
85 1  
105 2  
110 2  
105  
TA  
TC  
Ambient temperature  
Case temperature (without opt. Z) 2  
° C  
TC Z Component temp. with opt. Z 2  
TS  
Storage temperature  
Non operational  
1
2
3
See Thermal Considerations  
Temperature measurement point; see Mechanical Data  
Start-up at – 55 °C  
Reliability  
Table 15: MTBF at nom. load  
Model  
Ground benign  
40 °C  
Ground fixed  
Ground mobile  
50 °C  
Device hours1  
396 000  
Unit  
40 °C  
70 °C  
86 000  
294 000  
40IMX35 (MIL-HDBK-217F, TC)  
110IMX35 (Bellcore, TA)  
336 000  
141 000  
529 000  
110 000  
144 000  
h
1445 000  
1
The device hours are based upon the IMX35 series field failure rate recorded between 2000 and 2005  
Mechanical Data  
Dimensions in mm.Tolerances ±0.3 mm, unless noted.  
European  
Projection  
4 threads M3  
09121c  
09123c  
0.8 x 0.8  
TC Z  
0.8 x 0.8  
thread M3  
Bottom  
view  
Bottom  
view  
TC Z  
63.5  
72.8  
63.5  
69.6  
76.2  
TC Z  
TC  
Cores  
Fig. 17  
Fig. 16  
Case IMX35 (Standard)  
Case IMX35 open frame (option Z)  
Weight: approx. 43 g  
Material: Zinc; weight: approx. 67 g  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Safety and Installation Instructions  
Pin allocation  
Connection to the system shall be made via a printed circuit  
board with hole diameters of 1.5 mm for the pins.  
The converters should be connected to a secondary circuit.  
Do not open the converter.  
Table 16: Pin allocation  
Pin No.  
Quadruple  
output  
Ensure that a converter failure (e.g., by an internal short-circuit)  
does not result in a hazardous condition.  
1
2
PUL  
Vi–  
Input Fuse  
To prevent excessive current flowing through the input supply  
line in case of a short-circuit in the converter, an external fuse  
should be installed in the non-earthed input line. We  
recommend a fast acting fuse specified in table 3.  
3
n.c.  
4
Vi+  
5
Trim or Trim1  
W
6
Standards and Approvals  
7
Ref  
All converters are safety-approved to IEC/EN 60950-1 and  
UL/CSA 60950-1 2nd Ed.  
8
SD or i  
Vo3–  
Vo3+  
Vo2+  
Vo2–  
Vo1–  
Vo1+  
Vo4+  
Vo4–  
n.c.  
11  
12  
13  
14  
15  
16  
17  
18  
19  
The converters have been evaluated for:  
• Building-in  
• Basic insulation input to output, based on their maximum  
input voltage  
• Pollution degree 2 (not option Z)  
• Connecting the input to a secondary circuit, which is  
subject to a maximum transient rating of 1500 V.  
The converters are subject to manufacturing surveillance in  
accordance with the above mentioned standards.  
CB scheme is available.  
Railway Applications  
To comply with Railway standards, all components are coated  
with a protective lacquer (except for option Z).  
09122a  
11  
12  
13  
14  
15  
16  
17  
18  
19  
Protection Degree and Cleaning Liquids  
1
The protection degree is IP 30 (not for option Z). In order to  
avoid damage, any penetration of cleaning fluids should be  
prevented, since the converters are not hermetically sealed.  
2
3
4
5
6
7
8
Bottom  
view  
However, open-frame models (option Z) leave the factory  
unlacquered; they may be lacquered by the customer, for  
instance together with the mother board. Cleaning liquids are  
not permitted – except washing at room temperature with  
isopropyl alcohol and de-inonized/destilled water (1 : 1).  
Note: Cleaning liquids can damage the adhesive joints of the  
ferrite cores.  
Fig. 18  
Footprint. The holes in the PCB should have a diameter of  
1.5 mm.  
Isolation  
The electric strength test is performed in the factory as a  
routine test in accordance with EN 50514, EN 60950, and UL  
60950 and should not be repeated in the field. The Company  
will not honor any warranty claims resulting from electric  
strength field tests.  
Installation Instructions  
Installation of the converters must strictly follow the national  
safety regulations in compliance with the enclosure, mounting,  
creepage, clearance, casualty, markings, and segregation  
requirements of the end-use application.  
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IMX35 Series Data Sheet  
35 Watt Quad-Output DC-DC Converters  
Table 17: Electric strength test voltages  
Characteristic  
Input to  
(outputs+case)  
20/40IMX35  
Input to  
(outputs+case)  
70/110IMX35  
Outputs to  
case  
all models 3  
Between  
outputs  
all models  
Unit  
3
3
Factory test >1 s  
1.2 / 1.5 1  
1.5 / 2.1 1  
1.8  
2.5  
0.5  
0.7  
0.152  
0.22  
kVAC  
kVDC  
Equivalent DC voltage  
Insulation resistance  
at 500 VDC  
>100  
>100  
MΩ  
1
1.5 kVAC according to IEC 60950, sect. 6.2, Telecom equipment; type test with 1.5 kVAC / 60 s (IEE 802.3). IMX35 units produced before  
2013 were tested with 1.2 kVAC only.  
The test voltage between outputs is not applied as routine test.  
2
3
For open-frame models (option Z), only the insulation input to outputs is tested.  
should be connected to Vi– to enable the output (active low  
logic, fail safe).  
Options  
i: Inhibit (Negative Shutdown Logic)  
Voltage at pin 8:  
The outputs of the converter may be enabled or disabled by  
means of a logic signal (TTL, CMOS, etc.) applied to the inhibit  
pin 8. If the inhibit function is not required the inhibit (pin 8)  
Converter operating:  
Converter disabled:  
–10 V to 0.8 V  
2.4 V to 20 V or left  
open-circuit  
06138a  
Z: Open Frame  
4
8
2
Vi+  
For applications, where the protection by a housing is not  
necessary or in the case that the motherboard should be  
lacquered after fitting the converter.  
i
Note: The converters shall not be exposed to cleaning processes,  
as this will damage the glue of the ferrite cores.  
Vi–  
G: RoHS-6  
Fig. 19  
If the inhibit pin is not used, connect it to Vi–.  
Converters with a type designation ending by G are RoHS-  
compliant for all six substances.  
NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems,  
equipment used in hazardous environments, or nuclear control systems.  
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the  
date manufactured. Specifications are subject to change without notice.  
Copyright © 2015, Bel Power Solutions Inc. All rights reserved.  
www.belpowersolutions.com/power  
MELCHER  
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BCD20009-G Rev AD, 10-Aug-2015  
Page 15 of 15  

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70IMX35D05D15-8I

DC-DC Regulated Power Supply Module, 4 Output, 35W, Hybrid, 3 X 2.500 INCH, 10.50 MM HEIGHT, MA-17
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70IMX35D05D15-8IG

DC-DC Regulated Power Supply Module
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70IMX35D05D15-8IZ-G

4-OUTPUT 35W DC-DC REG PWR SUPPLY MODULE
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