20IMX15-03-8RGL [BEL]
DC-DC Regulated Power Supply Module, 1 Output, 14.9W, Hybrid,;
| 型号： | 20IMX15-03-8RGL |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 14.9W, Hybrid, |
| 文件： | 总20页 (文件大小：186K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
15 Watt DC-DC Converters
IMX 15 Series
IMY 15 Series
Wide input voltage ranges up to 150 V DC
1 or 2 outputs up to 48 V DC
1500...4000 V DC I/O electric strength test
• Extremely wide input voltage ranges
• Electrical isolation, also between outputs
• Emissions below EN 55022, level B
• Immunity to IEC/EN 61000-4-2,-3,-4,-5 and -6
• High efficiency (typ. 87%)
10.5
0.42"
• Input undervoltage lock-out
40.6
1.6"
51
2.0"
• Shut down input, output voltages adjustable
• Flex power: Flexible load distribution on outputs
• Outputs no-load, overload and short-circuit proof
• Operating ambient temperature up to –40...85°C
• Thermal protection
• 2" × 1.6" case with 10.5 mm profile
• Supplementary insulation: 20/40 IMX 15 types
• Double or reinforced insulation: 110 IMY 15 types
Safety according to IEC/EN 60950, UL 1950
LGA
1
1 For 110 IMY 15 types
Summary
40 IMX 15 types provide SELV outputs even if the bus volt-
age at the converter input exceeds the SELV-limit of
60 V DC. The 110 IMY 15 types provide double insulation
and are CE marked. They may be connected to e.g. a recti-
fied 110 V AC source without any further isolation barrier.
The IMX 15 and IMY 15 series of board mountable 15 Watt
DC-DC converters has been designed according to the lat-
est industry requirements and standards. The converters
are particularly suitable for use in mobile or stationary appli-
cations in transport, railways, industry, or telecommunica-
tion where variable input voltages or high transient voltages
are prevalent.
The circuit comprises of integrated planar magnetics and
all components are automatically assembled and solidly
soldered onto a single PCB without any wire connection.
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 71°C in free air without using any potting material. For
extremely high vibration environments the case has holes
for screw mounting. Various options as e.g. extended tem-
perature range –40...85°C or an alternative pinout provide
a high level of application specific engineering and design-
in flexibility.
Covering a total input voltage range from 8.4 up to 150 V
with 3 different types, the units are available with single,
dual and electrically isolated double outputs from 3.3 up to
48 V externally adjustable, with flexible load distribution on
dual and double output units. A shut down input allows re-
mote 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 in-
ternational safety standards IEC/EN 60950, UL 1950, CAN/
CSA C22.2 No.950-95 and approved / recognized LGA, UL
and cUL. The 20 IMX 15 and 40 IMX 15 types provide sup-
plementary insulation. Connected to a secondary circuit the
Table of Contents
Page
Page
Auxiliary Functions ......................................................... 12
Electromagnetic Compatibility (EMC) ............................ 13
Immunity to Environmental Conditions .......................... 15
Mechanical Data ............................................................ 16
Safety and Installation Instructions ................................ 17
Description of Option ..................................................... 20
Summary .......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key and Product Marking ........................................ 3
Functional Description ..................................................... 4
Electrical Input Data ......................................................... 5
Electrical Output Data ...................................................... 7
Edition 5/06.2001
1/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Type Survey and Key Data
Table 1: Type survey
Output 1
Output 2
Output
power
Po nom [W]
Input voltage Efficiency
Type designation
Options 2
1
1
Uo nom
Io nom
[A]
Uo nom
Io nom
[A]
Ui min...Ui max
[V DC]
htyp
[%]
[V DC]
[V DC]
3.3
3.3
3.3
4.5
4.5
4.5
-
-
-
-
-
-
14.9
14.9
14.9
8.4...36
16.8...75 3
50...150 4
84
85
84
20 IMX 15-03-9RG
40 IMX 15-03-9RG
110 IMY 15-08-8RG
-8, i, C, L, Z
-8, i, C, L, Z
i, Z
5.1
5.1
5.1
3.5
3.5
3.5
-
-
-
-
-
-
17.8
17.8
17.8
8.4...36
16.8...75 3
50...150 4
88
88
86
20 IMX 15-05-9RG
40 IMX 15-05-9RG
110 IMY 15-05-8RG
-8, i, C, L, Z
-8, i, C, L, Z
i, Z
5.1
5.1
5.1
2.3
2.5
2.5
-
-
-
-
-
-
11.7
12.8
12.8
8.4...36
16.8...75 3
50...150 4
85
83
83
20 IMX 15-05-9R
40 IMX 15-05-9R
110 IMY 15-05-8R
-8, i, C, L, Z
-8, i, C, L, Z
i, Z
12
12
1.3
1.3
-
-
-
-
15.6
15.6
8.4…36
16.8…753
88
88
20 IMX 15-12-9C
40 IMX 15-12 9C
-8
-8
15
15
1.0
1.0
-
-
-
-
15
15
8.4…36
16.8…753
88
88
20 IMX 15-15-9C
40 IMX 15-15-9C
-8
-8
5.1
5.1
5.1
1.35
1.5
1.5
3.3
3.3
3.3
1.35
1.5
1.5
11.3
12.6
12.6
8.4...36
16.8...75 3
50...150 4
84
84
82
20 IMX 15-0503-9R
40 IMX 15-0503-9R
110 IMY 15-0503-8R
-8, i, L, Z
-8, i, L, Z
i, Z
5
5
5
1.3
1.4
1.4
5
5
5
1.3
1.4
1.4
13.0
14.0
14.0
8.4...36
16.8...75 3
50...150 4
86
86
86
20 IMX 15-05-05-9
40 IMX 15-05-05-9
110 IMY 15-05-05-8
-8, K, i, C, L, Z
-8, K, i, C, L, Z
i, Z
12
12
12
0.65
0.7
0.7
12
12
12
0.65
0.7
0.7
15.6
16.8
16.8
8.4...36
16.8...75 3
50...150 4
88
88
87
20 IMX 15-12-12-9
40 IMX 15-12-12-9
110 IMY 15-12-12-8
-8, K, i, C, L, Z
-8, K, i, C, L, Z
i, Z
15
15
15
0.5
0.56
0.56
15
15
15
0.5
0.56
0.56
15.0
16.8
16.8
8.4...36
16.8...75 3
50...150 4
88
88
87
20 IMX 15-15-15-9
40 IMX 15-15-15-9
110 IMY 15-15-15-8
-8, K, i, C, L, Z
-8, K, i, C, L, Z
i, Z
24
24
24
0.32
0.35
0.35
24
24
24
0.32
0.35
0.35
15.4
16.8
16.8
8.4...36
16.8...75 3
50...150 4
86
86
86
20 IMX 15-24-24-9
40 IMX 15-24-24-9
110 IMY 15-24-24-8
-8, i, L, Z
-8, i, L, Z
i, Z
1 Flexible load distribution on dual and double outputs possible up to 75% of the total output power Po nom on one of the 2 outputs.
IMX/IMY 15-0503 types have reduced load distribution flexibility; 1.8 A max. on one of the 2 outputs. The other output should not ex-
ceed the difference to the total output power Po nom
2 See: Description of Options.
.
3 Short-time operation down to Ui min ≥14.4 V possible. Po reduced to approx. 85% of rated output power.
4 Short-time operation down to Ui min ≥43.2 V possible. Po reduced to approx. 85% of rated output power.
Edition 5/06.2001
2/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Type Key and Product Marking
20 IMX 15 - 05 - 05 -7 R G K i C L Z
Input voltage range Ui
8.4...36 V DC ........................................... 20
16.8...75 V DC ........................................... 40
50...150 V DC ......................................... 110
Series ......................................................... IMX 15, IMY 15
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 .................. 03, 05, 12, 15, 24
Operating ambient temperature range TA
–40...71°C (standard) ................................. -9
–40...85°C (option) ..................................... -8 2
Options and features:
R input and magnetic feedback .................. R 2 3
Synchronous rectification............................ G
Alternative pinout .........................................K 2 4
Inhibit ............................................................ i 2 5
Industrial C-pinout ...................................... C
Surface mount version with PCB lid ............ L
Open frame .................................................. Z
1 Not applicable with option K or -0503- types.
2 For lead times contact factory. Some types require a minimum order quantity.
3 Standard features for single output and -0503- types. Excludes option K.
4 Option K excludes option R.
5 Option inhibit excludes shut down and option K.
Examples: 20 IMX 15-05-05-9: DC-DC converter, input voltage range 8.4...36 V, 2 electrically isolated outputs each pro-
viding 5 V, 1.3 A.
110 IMY 15-0503-9R: DC-DC converter, input voltage range 50...150 V, 2 outputs with common return provid-
ing +5.1 V, 1.5 A and +3.3 V, 1.5 A. Unit fitted with magnetic feedback for tight output voltage regulation.
Product Marking
Basic type designation, output voltages and currents, applicable safety approval and recognition marks, Power-One patent
nos. and company logo. Date code and serial no.
Edition 5/06.2001
3/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Functional Description
The IMX/IMY 15 series of DC-DC converters are magnetic
feed-back controlled flyback converters using current mode
PWM (Pulse Width Modulation). The -05- and -0503- output
voltage versions as well as all double output versions fitted
with option R feature an active magnetic feedback loop via
a pulse transformer which results in very tight regulation of
the output voltage (see fig.: Block diagram, single output
types, -0503- types and double output types with option R).
The output voltages of these versions can be adjusted via
the R input. The R input is referenced to the secondary side
and allows for programming of the output voltages in the
range of approximately 80 to 105% of Uo nom using either an
external resistor or an external voltage source.
diagram, for double output types). The output voltages can
be adjusted via the Trim input. The Trim input is referenced
to the primary side of the converter and allows for program-
ming of the output voltages in the range 100 to 105% of
Uo nom by an external resistor or within 75 to 105% using an
external voltage source. The load regulation output charac-
teristic allows for paralleling of one or several double output
units with equal output voltages.
Current limitation is provided by the primary circuit, thus
limiting the total output power of double output types. The
shut down input allows remote converter on/off.
Overtemperature protection will shut down the unit in ex-
cessive overload conditions with automatic restart approxi-
mately every 50 to 60 ms.
The voltage regulation on the dual and double output ver-
sions without option R is achieved with a passive trans-
former feedback from the main transformer (see fig.: Block
03089
03039
1
3
Vi+
Vi+
Vo+
1
13
Vo1+
PWM
4
3
SD
15
11
Go
PWM
5
Vo–
Vo2+
n.c.
2 × 2200 pF
1500 V
2
Vi–
Vi–
2
12
17
Go
R
R
17
2 × 2200 pF
Fig. 1
Block diagram, single output types
03088
Fig. 3
Block diagram, -0503- types.
Vi+
SD
1
4
11
Vo+
Go
03090
Vi+
1
11
Vo1+
PWM
13
4
3
SD
12
13
Vo1–
PWM
Vo2+
Trim
Vi—
2
15
17
Vo—
n.c.
2 × 2200 pF
Vi–
2
15
17
Vo2–
Fig. 2
Block diagram, dual output types, alternative K-pinout.
n.c.
2 × 2200 pF
Fig. 4
Block diagram, double output types, standard pinout.
Edition 5/06.2001
4/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Electrical Input Data
General conditions:
– TA = 25°C, unless TC is specified.
– Shut down pin left open-circuit.
– Trim or R input left open-circuit.
Table 2: Input Data
Input
20 IMX
40 IMX
110 IMY
Characteristics
Conditions
min typ max
min typ max
min typ max
Unit
Ui
Input voltage range 1
Nominal input voltage
Repetitive surge voltage
TA min...TA max
Io = 0...Io nom
8.4 5
36 16.8 5 6
75
40
50 5 7
150
168
V DC
Ui nom
Ui sur
tstart up
20
110
9
Abs. max input (3 s)
40
100
Converter
start-up time 2
Switch on
SD high
Worst case condition at
Ui min and full load
0.25 0.5
0.25 0.5
0.25 0.5
s
0.1
5
0.1
5
0.1
5
trise
Rise time 2
Ui nom resistive load
Io nom capac. load
Io = 0, Ui min...Ui max
Io = 0...Io nom
ms
10
20
40
30
8
10
20
20
30
9
10
20
10
20
10
Ii o
No load input current
Reflected ripple current
Inrush peak current 3
Input capacitance
mA
mApp
A
Iirr
Iinr p
Ci
Ui = Ui nom
for surge calculation
Unit shut down
Unit operating
1.5
0.75
0.35
µF
USD
Shut down voltage
–10...0.7
–10...0.7
–10...0.7
V DC
open or 2...20
approx. 10
6
open or 2...20
approx. 10
3
open or 2...20
approx. 10
1
RSD
ISD
Shut down input resistance For current calculations
kΩ
Input current if unit
shut down
Ui min...Ui max
mA
fs
Switching frequency
Ui min...Ui max, Io = 0...Io nom
EN 55022 4
approx. 300
B 8
approx. 300
B
approx. 300
B
kHz
ui RFI
Input RFI levelconducted
1 Ui min will not be as stated if Uo is increased above Uo nom by use of the R or the Trin input. If the output voltage is set to a higher value,
Ui min will be proportionately increased.
2 Measured with resistive and max. admissible capacitive load.
3 Source impedance according to prETS 300132-2, version 4.3.
4 Measured with a lead length of 0.1 m, leads twisted. Double output units with both outputs in parallel.
5 Input undervoltage lock-out at typ. 80% of Ui min
.
6 Short time operation down to Ui min >14.4 V possible. Po reduced to approx. 85% of Po nom
7 Short time operation down to Ui min >43.2 V possible. Po reduced to approx. 85% of Po nom
.
.
8 20 IMX 15 types require 4.7 µF/50 V capacitance accross the input (Polyester, Philips 372 series).
9 See: Transient ETR 283 (19Pfl1), Electromagnetic Immunity.
Edition 5/06.2001
5/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
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 to further reduce this cur-
rent.
A built-in suppressor diode provides effective protection
against input transients which may be caused for example
by short-circuits accross the input lines where the network
inductance may cause high energy pulses.
04022
Table 5: Built-in transient voltage suppressor
I [A]
Type
Breakdown
voltage
VBr nom [V]
Peak power
at 1 ms
Peak pulse
current
Ipp [A]
4
3
2
Pp [W]
20 IMX 15
40 IMX 15
110 IMY 15
40
1500
1500
600
22
9.7
0.5
100
168
1
t [µs]
0
20
50 60 70 80 90 100
10
30 40
For very high energy transients as for example to achieve
IEC/EN 61000-4-5 or ETR 283 (19 Pfl1) compliance (as per
table: Electromagnetic Immunity) an external inductor and
capacitor are required. The components should have simi-
lar characteristics as listed in table: Components for exter-
nal circuitry for IEC/EN 61000-4-5, level 2 or ETR 283
(19Pfl1) compliance.
Fig. 6
Typical inrush current at Ui nom, Po nom versus time
(40 IMX 15). Source impedance according to
ETS 300132-2 at Ui nom
.
Uo
trise
Note: The suppressor diode D is only necessary for
20 IMX 15 types.
04008
Uo nom
Table 6: Components for external circuitry for IEC/EN
61000-4-5, level 2 or ETR 283 (19Pfl1) compliance.
t
tstart up
Type
Inductor (L)
68 µH, 2.7 A
Capacitor (C)
330 µF, 63 V
Diode (D)
20 IMX
40 IMX
110 IMY
1.5 k E47A
Fig. 7
220 µH, 1.3 A
330 µH, 0.43 A
2 × 100 µF, 100 V
2 × 100 µF, 200 V
-
-
Converter start-up and rise time
Input Undervoltage Lockout
04036
A special feature of these units is the accurate undervoltage
lockout protection which protects the units (and system)
from large currents caused by operation at low voltages.
This ensures easier start-up in distributed power systems.
L
Vi+
+
C
D
Table 3: Turn on and turn off voltage
Vi–
Type
Turn On
7.5...8
Turn Off
7...7.5
Units
V
Fig. 8
20 IMX
40 IMX
110 IMY
Example for external circuitry to comply with IEC/EN
61000-4-5 or ETR 283 (19Pfl1); the suppressor diode D is
only necessary for 20 IMX 15 types.
12.5...13.5
40...42.5
12...13
38...40.5
10
5
Reverse Polarity Protection
The built-in suppressor diode also provides for reverse po-
larity protection at the input by conducting current in the re-
verse direction. An external fuse is required to limit this cur-
rent.
Fig. 9
Dimensions of inductor L for 110 IMY 15 types
(e.g. TOKO 494LYF-0098K).
Table 4: Recommended external fuses
Converter type
20 IMX 15
Fuse type
F4.0A
22
04052
40 IMX 15
F2.0A
110 IMY 15
F1.0A
11.5
Fig. 10
23.8
Dimensions of inductor L for 20 IMX 15 and 40 IMX 15
types (e.g. Coil Craft, PCH-45 series).
Edition 5/06.2001
6/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Electrical Output Data
General conditions:
– TA = 25°C, unless TC is specified
– Shutdown pin left open circuit (not connected)
– R input not connected
Table 7a: Output data for single output units and -0503- types.
Output
3.3 V (RG)
5.1 V (RG)
Characteristics
Conditions
min
typ
max
3.35
min
typ
max
5.15
Unit
Uo1
Uo2
Output voltage
Ui nom
Io = 0.5 Io nom
3.25
5.05
V DC
Io nom Output current 1
20 IMX Ui min...Ui max
4.5
4.5
6.0
3.5
3.5
4.6
A
40 IMX/110 IMY
Io1L
Current limit 2
Ui nom, TC = 25°C
Uo1 = 93% Unom
DUo
uo1/2
Line/load regulation
Output voltage noise
Ui min...Ui max
Io = (0.01...1) Io nom
,
±0.5
±0.5
%
4
Ui min...Ui max
Io = Io nom
100
60
100
60
mVpp
5
Uo L
Output overvoltage limit. 6
115
130
4000
115
130
4000
%
µF
Co ext Admissible capacitive load
uo d
td
Dynamic
load
regulation
Voltage deviat. Ui nom
o nom ↔ 1/
Io nom
±250
±250
mV
ms
I
2
Recovery time
1
1
IEC/EN 61204
aUo
Temperature coefficient
DUo/DTC
Ui min...Ui max
Io = 0...Io max
±0.02
±0.02
%/K
1 Flexible load distribution: 20 IMX 15-0503-7; 1.6 A max. and 40 IMX 15/110 IMY 15-0503-7 types; 1.8 A max. on one of the 2 outputs,
the other output should not be loaded such that the total output power exceeds Po nom according to table: Type survey.
2 The current limit is primary side controlled. In the event of a sustained overload condition the thermal protection may cause the unit to
shutdown (restart on cool-down ).
3 For -0503- types: total capacitance, of both outputs.
4 BW = 20 MHz
5 Measured with a probe according to EN 61204
6 The overvoltage protection is via a primary side second regulation loop. It is not tracking with R control
Edition 5/06.2001
7/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Table 7b: Output data for single output units and -0503- types.
Output
5.1 V
5.1/3.3 V
typ
Characteristics
Conditions
min
typ
max
5.15
min
max
Unit
Uo1
Uo2
Output voltage
Ui nom
Io = 0.5 Io nom
5.05
5.0
3.13
5.12
3.46
V DC
Io nom Output current 1
20 IMX Ui min...Ui max
2.3
2.5
3.2
2 × 1.35
2 × 1.5
A
40 IMX/110 IMY
Io1L
Io2L
Current limit 2, 4
20 IMX Ui nom, TC = 25°C
Uo1 – 93% Unom
2.7
3.8
Io1L
Io2L
40 IMX/110 IMY
3.6
2.9
4.0
DUo
Line/load regulation
Ui min...Ui max
Io = (0.01...1) Io nom
,
±0.5
%
5.1 V Ui nom
+3, –5
±4.5
Io = (0.1...1) Io nom
3.3 V
5
6
uo1/2
Output voltage noise
Ui min...Ui max
Io = Io nom
70
40
80
mVpp
40
Uo L
Output overvoltage limit. 7
115
130
4000
115
130
%
µF
Co ext Admissible capacitive load
total: 4000 3
uo d
td
Dynamic
load
regulation
Voltage deviat. Ui nom
o nom ↔ 1/
Io nom
±250
±150
mV
ms
I
2
Recovery time
1
1
IEC/EN 61204
aUo
Temperature coefficient
DUo/DTC
Ui min...Ui max
Io = 0...Io max
±0.02
±0.02
%/K
1 Flexible load distribution: 20 IMX 15-0503-7; 1.6 A max. and 40 IMX 15/110 IMY 15-0503-7 types; 1.8 A max. on one of the 2 outputs,
the other output should not be loaded such that the total output power exceeds Po nom according to table: Type survey.
2 The current limit is primary side controlled. In the event of a sustained overload condition the thermal protection may cause the unit to
shutdown (restart on cool-down ).
3 For -0503- types: total capacitance, of both outputs.
4 For -0503- types: 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 via a primary side second regulation loop. It is not tracking with R control
Edition 5/06.2001
8/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Table 7c: Output data for dual and double output units.
Output
2 × 5 V
2 × 12 V
2 × 15 V
2 × 24 V
Characteristics
Conditions
min typ max min typ max min typ max min typ max
Unit
Uo1
Uo2
Output voltage
Ui nom
Io = 0.5 Io nom
4.95
4.94
5.05 11.90
5.06 11.88
12.10 14.88
12.12 14.85
15.12 23.80
15.15 23.75
24.20 V DC
24.25
Io nom Output current 1
20 IMX Ui min...Ui max
2 × 1.3
2 × 0.65
2 × 0.50
2 × 0.32
A
40 IMX/110 IMY
Current limit 2, 4
20 IMX Ui nom, TC = 25°C
40 IMX/110 IMY Uo = 93% Uo nom
2 × 1.4
3.0
2 × 0.70
1.6
2 × 0.56
1.3
2 × 0.35
0.85
IoL
3.2
1.7
1.4
0.90
DUo1 Line/load regulation
DUo2
Uo1 Ui min...Ui max, Io nom
±1
±3
±1
±1
±1
±3
%
Uo2 Ui nom
±3
±3
Io = (0.1...1) Io nom
5
uo1/2
Output voltage noise
Ui min...Ui max
Io = Io nom
80
40
120
60
150
70
240 mVpp
120
6
Uo L
Output overvoltage limit. 7
Min. load 1%
115
130
115
130
680
115
130
470
115
130
180
%
Co ext Admissible capacitive load 3
4000
µF
mV
ms
uo d
td
Dynamic
load
Voltage deviat. Ui nom
o nom ↔ 1/
Io nom
±250
±300
±300
±600
I
2
Recovery time
1
1
1
1
regulation
aUo
Temperature coefficientUi min...Ui max
DUo/DTC Io = 0...Io max
±0.02
±0.02
±0.02
±0.02 %/K
1 Flexible load distribution: With double or dual output units each output is capable of delivering 75% of the total output power.
The other output should not be loaded such that the total output power exceeds Po nom according to table: Type survey.
2 The current limit is primary side controlled. In the event of a sustained overload condition the thermal protection may cause the unit to
shutdown (restart on cool-down).
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 via a primary side second regulation loop, not tracking with Trim control.
8 Minimum load of 10% on output 1 recommended to prevent the two output voltages to drop in unbalanced load conditions.
Edition 5/06.2001
9/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Thermal Considerations
outputs track each other the protection diode is only pro-
vided in one of the outputs. The main purpose of this fea-
ture is to protect against possible overvoltages which could
occur due to a failure in the feedback control circuit. The
output overvoltage protection is not designed to withstand
externally applied overvoltages.
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: Mechani-
cal 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 influ-
enced by input voltage, output current, airflow, temperature
of surrounding components and surfaces and the proper-
ties 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.
Overtemperature Protection
The converters are protected from possible overheating by
means of an internal temperature monitoring circuit. It shuts
down the unit above the internal temperature limit and at-
tempts to automatically restart every 50 to 60 ms. This fea-
ture prevents from excessive internal temperature building
up which could occur in heavy overload conditions.
Short Circuit Behaviour
The current limit characteristic shuts down the converter
whenever a short circuit is applied to its output. It acts self-
protecting and automatically recovers after removal of the
overload condition (hiccup mode).
Caution: The case temperature TC measured at the:
Measuring point of case temperature TC (see: Mechani-
cal Data) may under no circumstances exceed the
specified maximum value. The installer must ensure that
under all operating conditions TC remains within the lim-
its stated in the table: Temperature specifications.
Connection in Series
The outputs of one or several single or double output units
can be connected in series without any precautions, taking
into consideration that the highest output voltage should
remain below 42 V to ensure that the output remains SELV.
Output Overvoltage Protection
The output of single output units as well as -0503- and
-05-05- types are protected against overvoltages by a sec-
ond control loop. In the event of an overvoltage on one of
the outputs the unit will shut down and attempt to restart
approximately every 50 to 60 ms. Double and dual output
units (with exception of the -0503- and -05-05- types) are
protected against overvoltages by a Zener diode across the
second output. Under worst case conditions the Zener di-
ode will short circuit. Since with double output units both
Connection in Parallel
Double outputs of the same converter with equal output
voltage (e.g. 5V / 5V) can be put in parallel and will share
their output currents almost equally. Parallel operation of
single or double outputs of two or more converters with the
same output voltage may cause start-up problems at initial
start-up. This is only advisable in applications where one
converter is able to deliver the full load current as e.g. re-
quired in true redundant systems.
Typical Performance Curves
General conditions:
– TA = 25ºC, unless TC is specified.
– Shut down pin left open circuit.
– Trim or R input not connected.
Uo [V]
Uo [V]
05020
05166
13
5.5
12
11
10
9
5.0
4.5
4.0
3.5
3.0
8
7
Io total [A]
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
0
0
0.4
1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 Io [A]
0.8
Fig. 12
Fig. 11
Uo versus Io (typ) of units with Uo = 5.1 V.
(110 IMY 15-05-7R)
Uo versus Io (typ) of double output units (2 × 12 V), with
both outputs in parallel. (110 IMY 15-12-12-7)
Edition 5/06.2001
10/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Uo1 [V]
13.5
Uo1, Uo2 [V]
05021
05039
14
13
12
11
10
13.0
Io2 = 0.035 A
12.5
Uo4
Uo1
12.0
Io2 = 0.35 A
11.5
Io1
Io1 nom
11.0
[%]
50
75
100
125
150
0
25
0.06
0.20
0.30
0.50 0.60 0.70 Io1 [A]
0.10
0.40
Fig. 13
Fig. 16
Cross load regulation Uo1 versus Io1 (typ) for various Io2
(2 × 12 V).
Flexible load distribution on double outputs (2 ¥ 12 V) with
load variation from 0...150% of Po1 nom on output 1.
Output 2 loaded with 50% of Po2 nom
.
h [%]
05167
90
h [%]
Ui min
Ui nom
05168
90
Ui min
80
70
60
Ui max
80
Ui nom
Ui max
70
Po
100 Po total
[%]
25
50
75
Po
100 Po total
60
[%]
25
50
75
Fig. 14
Efficiency versus input voltage and load. Typical values
40 IMX 15-12-12-7
Fig. 17
Efficiency versus input voltage and load. Typical values
110 IMY 15-12-12-7
05041
Uo [%]
overload short circuit condition
100
switch-off
70
8
t [ms]
60
60
Fig. 15
Overload switch off (hiccup mode), typical values.
Edition 5/06.2001
11/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Auxiliary Functions
Shut Down Function
Single output units and -0503- types fitted with option R:
The outputs of the converters may be enabled or disabled
by means of a logic signal (TTL, CMOS, etc.) applied to the
shut down pin. If the shut down function is not required then
it should be left open-circuit.
The R input is referenced to the secondary side of the con-
verter. Adjustment of the output voltage is possible by
means of either an external resistor or a voltage source.
a) Adjustment by means of an external resistor Rext
.
Converter operating:
Converter shut down: –10...0.7 V
2.0...20 V
Depending upon the value of the required output voltage,
the resistor shall be connected.
either: Between the R pin and Vo– to achieve an output
voltage adjustment range of approximately
Adjustable Output Voltage
– R input for single output units using synchronous rectifi-
cation (G)
– R input for single output units and -0503- types
– Trim input for double output units
Uo = 80...100% Uo nom
.
Uo
R
ext1 ≈ 4 kΩ • –––––––––
Uo nom – Uo
or: Between the R pin and Vo+ to achieve an output volt-
As a standard feature, the single and double output units of-
fer adjustable output voltage(s) by using the control input R
or Trim. If the control input is left open-circuit the output volt-
age is set to Uo nom. For output voltages Uo > Uo nom, the
minimum input voltage Ui min (see: Electrical Input Data) in-
age range of approximately Uo = 100...105% Uo nom
.
(Uo – 2.5V)
2.5 V • (Uo/Uo nom – 1)
R
ext2 ≈ 4 kΩ • ––––––––––––––––––
b) Adjustment by means of an external voltage Uext be-
tween Vo– and R pins.
creases proportionally to Uo/Uo nom
.
The control voltage range is 1.96...2.62 V and allows for
an adjustment in the range of approximately 80...105%
Single output units using synchronous rectification (G):
The R input is referenced to the secondary side of the con-
verter. Adjustment of the output voltage is possible by
means of an external resistor connected between the R pin
and either Vo+ or Vo–.
of Uo nom
.
Uo • 2.5 V
ext ≈ –––––––––
Uo nom
U
Attempting to adjust the output below this range will
cause the converter to shut down (hiccup mode).
Note: For the units with synchronous rectification Uo ad-
justment is different from the standard single output units
and -0503- types.
Note: Applying an external control voltage >2.75 V may
damage the converter.
06131
06029
Vo+
R
Vi+
L
Vo+
R
Rext2
Rext1
Uref 2.5 V
4 kΩ
+
control
circuit
Uext
Rext1
Rext2
—
Vi–
Vo—
N
Vo–
Fig. 18
Fig. 19
Output voltage control for single output units synchronous
rectification.
Output voltage control for single output units, -0503- types
and double output units fitted with option R by means of
the R input.
Table 8: Uo versus Uext approximate values
Double output units with Trim input:
Uo nom
Typ. values of Rext1
Typ. values of Rext2
[V]
Uo [% of Uo nom
]
Rext1 [kΩ] Uo [% of Uo nom Rext2 [kΩ]
]
The Trim input is referenced to the primary side. The figure
below shows the circuit topology. Adjustment of the output
voltage is possible by means of either an external resistor
Rext in the range of 100...105% of Uo nom or an external volt-
3.3
90
95
100
0.47
2.7
∞
100
105
110
∞
15
6.8
age source in the range of 75...105% of Uo nom
.
5.1
90
95
100
3.3
8.2
∞
100
105
110
∞
9.1
3.9-
06089
Vi+
Vo1+
Vo1–
Trim
+
Vo2+
Control
circuit
Uref 2.5 V
Uext
Rext
Vi–
–
Vo2–
Fig. 20
Output voltage control for double output units by means of
the Trim input.
Edition 5/06.2001
12/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
a) Adjustment by means of an external resistor Rext
:
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 Trim pin and Vi–. Connection of Rext 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 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 Trim 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 >20 V will set the converter into a hiccup
mode. Direct paralleling of the Trim pins of units con-
nected in parallel is feasible.
Table 9a: Rext1 for Uo > Uo nom
;
Table 9b: Uo versus Uext for Uo = 75...105% Uo nom
typical values (Ui nom, Io1/2 = 0.5 Io1/2 nom
;
approximate values (Ui nom, Io1, 2 = 0.5 Io1/2 nom
)
)
Uo [% Uo nom
]
Rext [kΩ]
Uo [% Uo nom
]
Uext [V]
105...108 (107 typically)
0
≥105
102
95
85
75
0
105
104
103
102
101
100
1.5
5.6
12
27
68
∞
1.6
4.5
9
13
Electromagnetic Compatibility (EMC)
A suppressor diode together with an input filter forms an ef-
fective protection against high input transient voltages
which typically occur in many installations, but especially in
battery driven mobile applications.
Electromagnetic Immunity
Table 10: 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)
1/50 ns
330 Ω
10 positive and
10 negative
discharges
yes
B
air discharge
(R pin open)
8000 Vp
Electromagnetic IEC/EN
field
antenna
10 V/m
AM 80%
1 kHz
26…1000 MHz
yes
A
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
yes
yes
B
B
transients with
15 ms burst
duration and a
300 ms period
Surge
IEC/EN
61000-4-5 5
3
3
+i/–i
2000 Vp
10 Vrms
1.2/50 µs
2 Ω
5 pos. and 5 neg.
impulses per
coupling mode
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
ETR 283
(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.
2 i = input, o = output.
3 A = normal operation, no deviation from specification, B = temporary deviation from specs. possibe.
4 For 40 IMX 15 types (additional external components required). Not applicable for 20 IMX 15 types.
5 External components required.
Edition 5/06.2001
13/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Electromagnetic Emission
[dBµV]
90
07020
[dBµV/m]
50
07108
80
70
60
50
40
30
20
10
0
A
EN 55022 A
EN 55022 B
40
30
20
10
B
[MHz]
0
MHz
Fig. 21
Fig. 22
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 15-05-7R)
Typical radio frequency-interference voltage at Ui nom,
Io nom, measured with an antenna (distance 10 m).
Output leads 1 m, twisted.
CISPR 22/EN 55022, Level B Radiated
Electromagnetic emission requirements according to
EN 55022, class B (radiated emmission) can be achieved
by adding an external common mode choke and (for
20 IMX 15 types) an additional capacitor, see: Input Data.
The filter components should be placed as close as possi-
ble to the input of the converter.
Table 11: Input filter components for EN 55022, level B,
radiated.
Type
Current compensated choke
20 IMX 15
40 IMX 15
110 IMY 15
1 mH, 2A
e.g. Tokin, type SC-02-10GS
07114
L
V+
Vi+
15
8.5
Module
V–
Vi–
Fig. 25
Example for external circuitry to comply with CISPR22/EN
55022, level B, radiated
Fig. 23
Choke dimensions (Tokin SC-02-10GS)
Edition 5/06.2001
14/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Immunity to Environmental Conditions
Table 12: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar)
Temperature
-9
Option -8 3
Characteristics
Conditions
Operational 2
min
–40
–40
–55
max
71
min
–40
–40
–55
max
85
Unit
TA
TC
TS
Ambient temperature 1
°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
3 Start up at –55°C
Table 13: MTBF and device hours
MTBF
Ground Benign
Ground Fixed
Ground Mobile
TC = 50°C
MTBF acc. to MIL-HDBK-217F
110 IMY 15-05-9R
TC = 40°C
TC = 40°C
TC = 70°C
485'000 h
255'000 h
167'000 h
223'000 h
Table 14: 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
93 +2/-3
56 days
Unit not
operating
%
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)
Fda Random vibration IEC 60068-2-35
Acceleration spectral density: 0.05 gn2/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
Edition 5/06.2001
15/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise indicated.
European
Projection
45.72 (1.8")
10.5 (0.41")
S09011
11
12
13
0.8 (0.03")
1
2
3
4
15
17
bottom view
Fixing hole for
M2 or KA 22
self tapping screws
47 (1.85")
50.8 (2")
Measuring point of case temperature TC
Fig. 24
Case IMX 15, IMY 15
Weight: <35 g
45.72 (1.8")
45.72 (1.8")
11.2
(0.44")
0.5 (0.02")
S90010
ø 1.0 (0.04")
3
4
1
2
5
bottom view
50.8 (2")
Measuring point of case temperature TC
Fig. 25
C pinout (option C)
10.5 (0.41")
45.72 (1.8")
0.8 (0.03")
S90011
11
12
13
1
2
15
17
3
4
bottom view
48.26 (1.9")
Fig. 26
Open frame (option Z)
Edition 5/06.2001
16/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
11.5 (0.45")
54.6 (2.15")
S90012
11
12
13
14
15
6
5
1
2
3
16
17
4
bottom view
50.8 (2")
Fig. 27
Surface mount version with PCB lid (option L)
Safety and Installation Instructions
Installation Instructions
Standards and approvals
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.
All DC-DC converters are pending to be UL recognized ac-
cording to UL 1950, UL recognized for Canada to CAN/
CSA C22.2 No. 950-95 and LGA approved to IEC/EN
60950 standards.
Connection to the system shall be made via a printed circuit
The units have been evaluated for:
board with hole diameters of 1.4 mm ±0.1 mm for the pins.
• Building in
• Supplementary insulation input to output, based on their
maximum input voltage (IMX 15 types)
• Reinforced insulation input to output, based on their
maximum input voltage (IMY 15 types)
• 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 (IMX 15
types)
The units should be connected to a secondary circuit.
Check for hazardous voltages before altering any connec-
tions.
Do not open the module.
Ensure that a unit failure (e.g. by an internal short-circuit)
does not result in a hazardous condition. See also: Safety
of operator accessible output circuit.
• Connecting the input to a primary circuit which is subject
to a maximum transient rating of 2500 V (IMY 15 types)
Input Fuse
To prevent excessive current flowing through the input sup-
ply line in case of a short-circuit across the converter input
an external fuse should be installed in a non earthed input
supply line. We recommend a fast acting fuse F4.0A for
20 IMX 15 types, F2.0 A for 40 IMX 15 types and a fuse
F1.0A for 110 IMY 15 types.
After approvals the DC-DC converters are subject to manu-
facturing surveillance in accordance with the above men-
tioned UL, CSA, EN and with ISO 9001 standards.
Edition 5/06.2001
17/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Table 15: Pin allocation
Pin
Standard and Option Z
Option K
Option C
single
Option L
single
double
Vi+
-0503-
Vi+
Vi–
n.c.
SD
-
dual
Vi+
Vi–
-
dual
single
Vi+
double
Vi+
1
2
Vi+
Vi–
-
Vi+
Vi+
Vi–
Vi–
Vi–
Vi–
Vi–
3
Trim
SD
Vo+
Vo+
n.c.
SD
Trim
SD
4
SD
-
SD
-
-
Go
5
-
Vo–
Vo–
n.c.
n.c.
n.c.
n.c.
Vo+
Vo–
R
n.c.
6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
n.c.
11
12
13
15
17
-
Vo1+
Vo1–
Vo2+
Vo2–
n.c.
Vo2+
Go
Vo1+
Go
R
Vo+
-
Vo1–
Vo2–
Vo1+
Vo2–
n.c.
-
Vo+
Vo–
R
Go
Vo–
n.c.
10005
Isolation
The electric strength test is performed as factory test in ac-
cordance with IEC/EN 60950 and UL 1950 and should not
be repeated in the field. Power-One will not honour any
guarantee claims resulting from electric strength field tests.
11
12
13
1
Bottom view
Table 16: Electric strength test voltages
2
3
4
15
17
Characteristic
Input to output
Output to Unit
output
IMX 15
IMY 15
Electric strength
test voltage 1 s
1.2
3.0
0.1
0.15
-
kVrms
kV DC
MΩ
1.5
4.0
Fig. 28
Pin allocation
Insulation resistance
at 500 V DC
>100
>100
Partial discharge
extinction voltage
Consult factory
-
kV
Protection Degree
The protection degree of the DC-DC converters is IP 40.
Cleaning Agents
In order to avoid possible damage, any penetration of
cleaning fluids should be prevented, since the power sup-
plies are not hermetically sealed.
Edition 5/06.2001
18/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Safety of operator accessible output circuit
IEC/EN 60950 up to a configured output voltage (sum of
nominal voltages if in series or +/– configuration) of 42 V.
If the output circuit of a DC-DC converter is operator acces-
sible, it shall be an SELV circuit according to the IEC/EN
60950 related safety standards
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.
The following table shows some possible installation con-
figurations, compliance with which causes the output circuit
of the DC-DC converter to be an SELV circuit according to
Table 17: 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 safety status of the
Maximum Minimum required
Type
Measures to achieve the Safety status of
specified safety status of the DC-DC
by the AC-DC front end,
including mains supplied from the
battery charger
voltage
front end output
circuit
the output circuit
converter output
circuit
front end 1
Mains
Operational (i.e. there is
≤150 V
Primary
IMY 15 Double or reinforced
insulation, based on
150 V AC and DC (pro-
vided by the DC-DC
converter)
SELV circuit
≤150 V AC no need for electrical iso-
lation between the mains
supply voltage and the
DC-DC converter input
voltage)
Mains
≤250 V AC
Basic
≤60 V
≤75 V
≤150 V
Earthed SELV circuit 2 IMX 15 Operational insulation
IMY 15 (provided by the DC-DC
converter)
Hazardous voltage
secondary circuit
IMX 15 Input fuse 3 output sup-
pressor diodes 4, and
Earthed SELV
circuit
2
earthed output circuit
IMY 15 Supplementary insulation SELV circuit
based on 250 V AC and
double or reinforced
insulation, based on the
maximum rated output
voltage from the front end
(provided by the DC-DC
converter)
Double or reinforced
≤60 V
≤75 V
SELV circuit
IMX 15 Operational insulation
IMY 15 (provided by the DC-DC
converter)
Double or reinforced
insulated unearthed
hazardous voltage
secondary circuit 5
IMX 15 Supplementary insulation
based on the maximum
rated output voltage from
the front end (provided by
the DC-DC converter)
≤120 V
≤150 V
TNV-2 circuit
IMY 15 Double or reinforced
insulation, based on the
maximum rated output
voltage from the front end
(provided by the DC-DC
converter)
Double or reinforced
insulated earthed or
unearthed hazardous
voltage secondary
circuit
1 The front end output voltage should match the specified input
voltage range of the DC-DC converter.
10004
Fuse
2 The earth connection has to be provided by the installer accord-
ing to the relevant safety standard, e.g. IEC/EN 60950.
3 The installer shall provide an approved fuse (type with the low-
est rating suitable for the application) in a non-earthed input
conductor 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.
+
~
Mains
Suppressor
diode
AC-DC
front
end
DC-DC
con-
verter
Battery
SELV
–
~
Earth
connection
Earth
connection
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 at least basic insulation ac-
cording to the relevant safety standard, based on the maximum
output voltage from the front end.
Fig. 29
Schematic safety concept. Use fuse, suppressor diode
and earth connection as per table Safety concept leading
to an SELV output circuit.
Edition 5/06.2001
19/20
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Description of Options
Table 18: Survey of options
Option
Function of option
Characteristic
–8
K
i
Extended operational ambient temperature range
TA = –40...85°C
Alternativ pinout
See mechanical data
Inhibit
C
L
C-pinout
See mechanical data
See mechanical data
See mechanical data
Surface mount version with PCB lid
Open frame
Z
Option -8
Option K
Extended Temperature Range
Alternative Pinout
Extension of the temperature range from standard
–40...85°C. In the upper temperature range the output
power derating below should be observed. The modules
will provide the specified output power with free air convec-
tion cooling.
Option K configures the electrically isolated double outputs
to the alternative pinout with outputs connected in series
(Vo+/Go/Vo–) and common ground.
However instead of using units with option K, it is recom-
mended to use the standard double output units by provid-
ing the printed circuit board with an additional pin hole (for
pin 12 of double output units) connected to pin hole 13. This
will provide more design-in flexibility since by that both
pinouts may be used on the same PCB.
Po/Po max
11047
1.2
1.0
0.8
0.6
Option i
Inhibit
Excludes shut down and option K.
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).
0.4
0.2
0
–40
TA [°C]
–20
0
80
20
40
60
Fig. 30
Converter operating:
Converter inhibited
–10 V...0.8 V
Maximum allowed output power versus ambient tempera-
ture.
or inhibit left open circuit:
2.4 V...Ui max (<75 V)
06070
Vi+
i
Vi–
Fig. 31
If the inhibit is not used the inhibit pin should be con-
nected to Vi–
Edition 5/06.2001
20/20
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