40IMX7-24-24-8G - Power-One

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Input voltage ranges up to 150 VDC

1 or 2 outputs up to 48 VDC

1500 to 2500 VDC I/O electric strength test

•RoHS lead-free solder and lead-solder-exempted products

are available

•Extremely wide input voltage ranges

•Electrical isolation, single and dual outputs

•Immunity to IEC/EN 61000-4-2, -3, -4, -5, -6

•High efficiency (typ. 84%)

• Flex power: flexible load distribution on outputs

•Outputs no-load and short-circuit proof

•High reliability and no derating

•Operating ambient temperature –40 to +85 °C

• 2” × 1” case with 10.5 mm profile

Description

The IMX7 Series of board-mountable 7 Watt DC-DC converters

has been designed according to the latest industry require-

ments and standards. The converters are particularly suitable

for use in mobile or stationary applications in transport,

railways, industry, or telecom, where variable input voltages or

high transient voltages are prevalent.

Covering a total input voltage range from 8.4 VDC up to

150 VDC with four different types, the converters are available

with single and electrically isolated double outputs from 3.3 up

to 48 VDC with flexible load distribution on double outputs.

Features include efficient input and output filtering with

unsurpassed transient and surge protection, low output ripple

and noise, consistently high efficiency over the entire input

voltage range, and high reliability as well as excellent dynamic

response to load and line changes.

The converters provide supplementary insulation with SELV

outputs as for inst ances required in battery-supported systems,

where the bus voltage may exceed the SELV limit of 60 V. They

are designed and built according to the international safety

standards IEC/EN 60950 and approved by TÜV, UL, and cUL.

In addition, 70IMX7 and 110IMX7 models are CE-marked.

The circuit is comprised of integral planar magnetics, and all

components are automatically assembled and solidly soldered

onto a single PCB without any wire connections. Magnetic

feedback ensures maximum reliability and repeatability in the

control loop over all operating conditions. Careful con-

siderations 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.

Several options such as open-frame provide a high level of

application-specific engineering and design-in flexibility.

Features

Table of Contents Page Page

50.8

2.0"

25.4

1.0"

10.5

0.42"

Description .............................................................................1

Model Selection .....................................................................2

Functional Description ...........................................................3

Electrical Input Data...............................................................4

Electrical Output Data ............................................................6

Auxiliary Functions.................................................................8

Electromagnetic Compatibility (EMC) ..................................10

Immunity to Environmental Conditions ................................ 11

Safety and Installation Instructions ......................................12

Mechanical Data ..................................................................12

Description of Options .........................................................13

EC Declaration of Conformity ..............................................14

1 70/110IMX7 models

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Model Selection

Table 1: Model Selection

Output 1 Output 2 Output power Input voltage Efficiency Model Options2

Vo1 nom Io1 nom Vo2 nom Io2 nom Po nom range ηη

ηη

ηtyp

[VDC] [A] 1 [VDC] [A] 1 [W] [VDC] [%]

3.3 1.5 - - 5 8.4 – 36 79 20IMX7-03-8 Z, G

3.3 1.5 - - 5 16.8 – 75381 40IMX7-03-8 Z, G

3.3 1.5 - - 5 40 – 121 79 70IMX7-03-8 Z, G

3.3 1.5 - - 5 60 – 150 79 110IMX7-03-8 Z, G

5.1 1.2 - - 6.1 8.4 – 36 80 20IMX7-05-8 Z, G

5.1 1.2 - - 6.1 16.8 – 75381 40IMX7-05-8 Z, G

5.1 1.2 - - 6.1 40 – 121 80 70IMX7-05-8 Z, G

5.1 1.2 - - 6.1 60 – 150 80 110IMX7-05-8 Z, G

5 0.6 5 0.6 6 8.4 – 36 82 20IMX7-05-05-8 Z, G

5 0.6 5 0.6 7 16.8 – 75383 40IMX7-05-05-8 Z, G

5 0.6 5 0.6 7 40 – 121 82 70IMX7-05-05-8 Z, G

5 0.6 5 0.6 7 60 – 150 82 110IMX7-05-05-8 Z, G

12 0.25 12 0.25 6 8.4 – 36 84 20IMX7-12-12-8 Z, G

12 0.25 12 0.25 7.2 16.8 – 75384 40IMX7-12-12-8 Z, G

12 0.25 12 0.25 7.2 40 – 121 83 70IMX7-12-12-8 Z, G

12 0.25 12 0.25 7.2 60 – 150 84 110IMX7-12-12-8 Z, G

15 0.2 15 0.2 6 8.4 – 36 84 20IMX7-15-15-8 Z, G

15 0.2 15 0.2 7.2 16.8 – 75384 40IMX7-15-15-8 Z, G

15 0.2 15 0.2 7.2 40 – 121 83 70IMX7-15-15-8 Z, G

15 0.2 15 0.2 7.2 60 – 150 84 110IMX7-15-15-8 Z, G

24 0.13 24 0.13 6.2 8.4 – 36 84 20IMX7-24-24-8 Z, G

24 0.13 24 0.13 7.2 16.8 – 75384 40IMX7-24-24-8 Z, G

24 0.13 24 0.13 7.2 40 – 121 83 70IMX7-24-24-8 Z, G

24 0.13 24 0.13 7.2 60 – 150 84 110IMX7-24-24-8 Z, G

1Flexible load distribution on double outputs possible.

2If only one output voltage is required, connect both outputs of double-output models in parallel.

3Operation at low input voltage possible, if Po is reduced to approx. 80% of Po nom at Vi min = 14.1 V.

Part Number Description

Input voltage range Vi

8.4 – 36 VDC ......................................... 20

16.8 – 75 VDC ....................................... 40

40 – 121 VDC ........................................ 70

60 – 150 VDC ...................................... 11 0

Series.........................................................................IMX7

Output voltage of output 1...................... 03, 05, 12, 15, 24

Output voltage of output 2............................ 05, 12, 15, 24

Operating ambient temperature TA

–40 to 85 °C ............................................... -8

Options: Open frame.................................................. Z

RoHS compliant for all six substances......... G

Example: 20IMX7-05-05-8ZG: DC-DC converter, input voltage range 8.4 – 36 V, 2 outputs providing each 5 V, 600 mA,

temperature range –40 to 85 °C, open frame, RoHS compliant for all six substances.

Obsolete options (NFND: not for new designs; contact Power-One for availability):

TA = –25 to 71 °C .......................................-9

Surface mount version ............................... M

C-pinout ...................................................... C

20 IMX7 - 05 - 05 -8 Z G

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Functional Description

The IMX7 Series DC-DC converters are feedback-controlled

flyback converters using current mode PWM (Pulse Width

Modulation).

In the case of single-output models, the output is directly

sensed 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 the output voltages in the range 75 to 105%

Vo nom, using either an external resistor or an external voltage

source.

Fig. 2

Block diagram for dual-output models with standard pinout.

Fig. 1

Block diagram for single-output models with standard pinout.

PWM

2 × 2200 pF

Vi+

Vi–

n.c.

Vo+

–

03041a

PWM

2 × 2200 pF

Vi+

Trim (R)

Vi–

Vo1+

Vo1–

Vo2+

Vo2–

n.c.

03042a

For double-output models, the output voltage is sensed by a

separate transformer winding close to the secondary and fed

back to the primary control circuit. The close magnetic coupling

provided by the planar construction ensures very good

regulation and allows for flexible load distribution. The Trim

input (R) is referenced to the primary side of double-output

models, and allows for programming the output voltages in the

range 100 to 105% Vo nom by means of an external resistor, or

within 75 to 100% Vo nom, using an external voltage source.

Current limitation is provided by the primary circuit, thus limiting

the total output current (Io nom for the single- and the sum of

Io1 nom and Io2 nom for the double-output models).

The inhibit input i allows remote control of the outputs; pin i

must be connected to Vi– to activate the converter.

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Electrical Input Data

General conditions:

–T

A = 25°C, unless TC is specified.

– Connector pin i connected with Vi–.

– Trim or R input not connected.

Table 2: Input Data

Input 20IMX7 40IMX7 70IMX7 110IMX7

Characteristics Conditions min typ max min typ max min typ max min typ max Unit

ViInput voltage range1TC min – TC max 8.4 36 16.8 6 75 40 121 60 150 VDC

Vi nom Nominal input voltage Io = 0 – Io nom 20 40 70 110

Vi sur Repetitive surge voltage abs. max input (3 s) 50 5 100 150

tstart up Converter 2 switch on Worst case condition at 0.25 0.5 0.25 0.5 0.25 0.5 0.25 0.5 s

start-up time inh. release Vi min and full load 0.1 0.1 0.1 0.1

trise Rise time 2 Vi nom resistive load 5 5 5 5 m s

Io nom capacitive load 12 12 12 12

Ii o No load input current Io = 0, Vi min – Vi max 15 30 8 15 8 15 8 15 mA

CiInput capacitance (for surge calculation) 4.7 0.5 0.2 0.2 µF

Vinh Inhibit voltage converter operating –10 0.8 –10 0.8 –10 0.8 –10 0.8 V

converter inhibited 2.4 Vi max 2.4 Vi max 2.4 Vi max 2.4 Vi max

or open or open or open or open

Iinh Inhibit current converter operating – 0.5 – 0.5 –0.5 –0.5 m A

converter inhibited 1 1 1 1

Ii inh Input current when the Vi min – Vi max 3.0 3.0 3.0 3.0

converter is inhibited

Iinr p Inrush peak current Vi = Vi nom 4 3.8 3.7 4.2 5.6 A

fsSwitching frequency Vi min – Vi max, Io = 0 – Io nom approx. 400 approx. 400 approx. 400 approx. 300 kHz

Ii rr Reflected ripple current Io = 0 – Io nom 50 30 20 10 mApp

Vi RFI Input RFI level EN 55022 3 BBBB

conducted and radiated

1Vi min will not be as stated, if Vo is increased above Vo nom by use of the R or Trim input. If the output voltage is set to a higher value, Vi min

will be proportionally increased.

2Measured with a resistive and the max. admissible capacitive load.

3Measured with a lead lenght of 0.1 m, leads twisted. Double output units with both outputs in parallel. 70/110 IMX7 types need an external

capacitor at the input. (e.g. 1 µF film or ceramic)

4Source impedance according to prETS 300132-2, version 4.3, at Vi nom.

5The DC-DC converter shuts down automatically at approx. 38 V.

6Operation at lower input voltage possible: Po approx. 80% of Po nom at Vi min = 14.4 V.

Fig. 3

Converter start-up and rise time

o nom

start up

rise

04008a

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Input Transient Voltage Protection

In many applications transient voltages on the input of the

converter are always possible caused, for example by short

circuits between Vi+ and Vi–, where the network inductance

may cause high energy pulses.

In order to protect the converters, transient suppressors are

fitted to the input; see table below:

Table 3: Built-in transient voltage suppressor

Model Breakdown Peak Power Peak Pulse

Voltage at 1 ms Current

VBR nom PPIPP

20IMX7 1 overvoltage lockout at approx. 38 V

40IMX7 2 100 V 1500 W 11 A

70IMX7 2 144 V 600 W 2.9 A

110IMX7 2 167 V 600 W 2.5 A

1The built-in overvoltage trigger shuts down the converter at

approx. 38 V protecting the input up to 50 V. 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.

2If transients generating currents above the peak pulse current are

possible, 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. 20IMX7 40IMX7 70IMX7 110IMX7

L 330 µH, 0.115 Ω330 µH, 0.42 Ω1000 µH, 2.9 Ω330 µH

1 A 600 mA 290 mA 200 mA

C 68 µF, 63 V 68 µF, 100 V 47 µF, 150 V 200 µF, 200 V

D 1.5KE39A n.a. n.a. n.a.

Fig. 4

Example for external circuitry to comply with IEC/EN

61000-4-5, level 2 (transzorb D only for 20IMX7).

To achieve IEC/EN 61000-4-5, level 2 compliance, an

additional inductor and capacitor should be provided externally

as shown in the figure below. The components should have

similar characteristics as listed in table 4.

Note: The suppressor diode D is only necessary for 20IMX7

models. To withstand 150 V transients according to 19 Pfl 1,

applicable for 40 IMX7 models, the same external circuitry with

similar components as for IEC/EN 61000-4-5, level 2

compliance can be used.

Vi+

Vi–

07064

Input Fuse and Reverse Polarity Protection

The suppressor diode on the input also provides for reverse

polarity protection by conducting current in the reverse

direction, thus protecting the converter. An external fuse is

required to limit this current. We recommend:

– For 20IMX7 a fast 2 A (F2A) fuse

– For 40IMX7 a fast 1 A (F1A) fuse

– For 70IMX7 a fast 0.63 A (F.63A) fuse

– For 110IMX7 a fast 0.63 A (F.63A) fuse

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.

Fig. 5

Typical inrush current at Vi nom, Po nom measured according to

ETS 300132-2 (40IMX7).

0 20 40 60 80 µs

04030a

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Electrical Output Data

General conditions:

–T

A = 25°C, unless TC is specified.

– Pin i connected with Vi–; Trim or R input left open-circuit.

Table 5a: Output data for single-output models

Output Vo nom 3.3 V 5.1 V

Characteristics Conditions min typ max min typ max Unit

VoOutput voltage setting Vi nom 3.28 3.32 5.07 5.13 V

Io nom Output current (nom.) Vi min – Vi max 1.5 1.2 A

Io L Current limit2Vi nom 3.0 2.4

∆VoLine and load regulation Vi min – Vi max ±1 ±1 %

Io = (0.05 – 1) Io nom

voOutput voltage noise Vi min – Vi max 570 70 mVpp

20/40/70IMX7 Io = Io nom 620 40 20 40

110IMX7 40 50 40 50

Vo clp Output overvoltage limit 7 Minimum load 1 % 115 130 115 130 %

Co ext Admissible capacitive load 2500 2000 mF

Vo d Dynamic Voltage deviat. Vi nom ±250 ±250 mV

tdload Recovery time Io nom ↔ 1/2 Io nom 11ms

regulation

αVo Temperature coefficient Vi min – Vi max ±0.02 ±0.02 %/K

∆Vo/∆TC (TC min to TC max)Io = (0.05 – 1 ) Io nom

Table 5b: Output data for double-output models

Output Vo nom 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

Vo1 Output voltage setting Vi nom 4.96 5.04 11.90 12.10 14.88 15.12 23.81 24.19 VDC

Vo2 Io1 = Io2 = 0.5 Io nom 4.95 5.05 11.88 12.12 14.85 15.15 23.75 24.25

Io nom Output 20IMX7 Vi min – Vi max 2 × 0.6 2 × 0.25 2 × 0.2 2 × 0.13 A

current140/70/110IMX7 2 × 0.7 2 × 0.3 2 × 0.24 2 × 0.15

Io L Current 20IMX7 Vi nom 2.4 1.0 0.95 0.5

limit 2 3 40/70/110IMX7 2.8 1.2 1.1 0.6

∆Vo1 Line regulation Vi min – Vi max, Io nom ±1 ±1 ±1 ±1 %

∆Vo l Load regulation 4Vi nom, (0.1 – 1) Io nom ±3 ±3 ±3 ±3

vo1, 2 Output voltage noise Vi min – Vi ma 580 120 150 240 mVpp

Io = Io nom 620 40 25 50 30 60 50 100

Vo clp Output overvoltage limit 7 Minimum load 1% 115 130 115 130 115 130 115 130 %

Co ext Admissible capacitive load32000 300 200 100 µF

Vo d Dynamic Voltage deviat. Vi nom ±150 ±330 ±350 ±600 mV

tdload Recovery time Io nom ↔ 1/2 Io nom 111 1ms

regulation

αVo Temperature coefficient Vi min – Vi max ±0.02 ±0.02 ±0.02 ±0.02 %/K

∆Vo/∆TC (TC min to TC max)Io = (0.05 – 1) Io nom

1Each output is capable of delivering full output power Po nom according to table: Model Selection.

2The current limit is primary side controlled.

3Measured with both outputs connected in parallel.

4Conditions for specified output. Other output loaded with constant current Io = 0.5 Io nom.

5BW = 20 MHz

6Measured with a probe according to EN 61204.

7The overvoltage protection is not tracking with the R control.

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Thermal Considerations

If a converter, mounted on a PCB, is located in free, quasi-

stationary air (convection cooling) at the maximum ambient

temperature TA max (see table Temperature specifications) and

is operated at 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 integration into a system. The

thermal conditions depend on input voltage, output current,

airflow, temperature of surrounding components and surfaces

and the 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.

Caution: The case temperature TC measured at the measuring

point of case temperature TC (see Mechanical Data) may under

no circumstances exceed the specified maximum. The installer

must ensure that under all operating conditions TC remains

within the limits stated in the table Temperature specifications.

Short-Circuit Behavior

The current limitation shuts down the converter, when a short

circuit is applied to the output. It acts self-protecting, and

automatically recovers after removal of the overload condition.

Fig. 7

Vo versus Io (typ.) of single-output models with Vo = 5.1 V

Fig. 8

Vo versus Io (typ.) of double-output models (2 ×12 V) with both

outputs in parallel

Fig. 9

Cross load regulation (typ.) of double-output models (2 ×12

V). The cross-load effect is negligible.

Output Overvoltage Protection

The outputs are protected against overvoltages by Zener

diodes. In the event of an overvoltage, the converter will shut

down and attempt to restart automatically. The main purpose of

this feature is to protect against possible overvoltages, which

could occur due to a failure in the feedback control circuit. The

converters are not designed to withstand external overvoltages

applied to the outputs.

Connection in Series or Parallel

The outputs of single or double-output models can be

connected in series without any precautions, taking into

consideration that the output voltage should remain below 60 V

for SELV operation.

Both outputs of double-output models can be connected in

parallel without any precautions. Several converters (single- or

double-output models) with equal output voltage can be put in

parallel and will share their output current quite equally.

However, this may cause start-up problems and is only

recommended in applications, where one converter is able to

deliver the full load current, e.g., in true redundant systems.

Typical Performance Curves

Fig. 6

Overload switch-off (hiccup mode).

100

[%]

05041a

0.3 s

overload short-circuit condition

switch-off

[V]

0.2 0.4 0.6 0.8 I

o total

[A]

05086a

5.5

5.0

4.5

4.0

3.5

3.0 00.4 0.8 1.2 1.6 Io [A]

Vo [V]

05087a

11.5

12.5

13.5

[V]

0.10 0.15 0.20 0.25 0.3 I

[A]

0.05

05088a

= 0.3 A

= 0.03 A

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Fig. 11

Efficiency versus input voltage and load.

Typical values (40IMX7-12-12-8).

Fig. 10

Flexible load distribution on double-outputs models (2 ×12 V)

with load variation from 0 to 150% of Po1 nom on output 1.

Output 2 loaded with 25% of Po2 nom.

Vo1, Vo2 [V]

Io1

Io1 nom

05059a

12.8

12.4

11.6

11.2 030

60 90 120 150 [%]

Vo2

Vo1

90 05052a

25 50 75 100 % Po

Po nom

Vi nom

Vi max

Vi min

η [%]

Auxiliary Functions

Inhibit Function

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).

Converter operating: –10 V to 0.8 V

Converter inhibited

or inhibit pin i left open: 2.4 V to Vi max (20/40IMX7)

2.4 V to 75 V (70/110IMX7)

Adjustable Output Voltage

As a standard feature, all IMX7 converters offer adjustable

output voltage(s) by using a control pin. If this pin is left open-

circuit, the output voltage is set to Vo nom. The output voltage is

adjustable in the range 75 to 105% Vo nom.The circuit works for

single- and double-output models in a different way. For output

voltages Vo >Vo nom, the minimum input voltage Vi min (see

Electrical Input Data) increases proportionally to Vo/Vo nom.

Single-output models with R-input:

The R input (pin 13) is referenced to the secondary side of the

converter. 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:

Depending upon the value of the required output voltage, a

resistor Rext1 or Rext2 shall be connected as shown in the

figure below:

Fig. 12

If the inhibit is not used, the inhibit pin should be

connected to Vi–

Vi+

Vi–

06070

Vo+

Vo–

Vi+

Vi– Rext2

Rext1

06131a

Fig. 13

Output voltage control with external resistor

BCD20007 Rev AA Page 9 of 14 www.power-one.com

IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Fig. 14

Output voltage adjust for single-output models

Either: Rext1 between the R pin and Vo– to achieve an

output voltage adjustment range of Vo = 75 to 100% Vo nom

(85 to 100% for 3.3 V outputs):

Rext1 ≈ 4 kΩ • –––––––––

Vo nom – Vo

or: Rext2 between the R pin and Vo+ to achieve an output

voltage range of approximately Vo = 100 to 105% Vo nom:

(Vo – 2.5 V)

Rext2 ≈ 4 kΩ • ––––––––––––––––––

2.5 V • (Vo/Vo nom – 1)

b) Adjustment by means of an external voltage Vext between

Vo– and R pin.

The control voltage is 1.96 to 2.62 V and allows for

adjustment in the range of 75 to 105% Vo nom.

Vo • 2.5 V

Vext ≈ ––––––––

Vo nom

Caution: Applying an external voltage >2.75 V may damage the

converter.

Note: Attempting to adjust the output below this range will cause

the converter to shut down (hiccup mode).

Vo+

Vo–

ext

4 kΩ

ref

= 2.5 V

control

circuit

Vi+

Vi– R

ext1

ext2

06029a

–

Double-output models with Trim input:

The Trim input (pin 4) of double-output models is referenced to

the primary side. The figure below shows the circuit topology.

Adjustment of the output voltage is possible in the range of 100

to 105% Vo nom using an external resistor , or in the range of 75 to

105% Vo nom using an external voltage source.

Trim

Vo1+

Vo2–

ext

–

Vi+

Vi–

ext

Vo1–

Vo2+

06089a

Control

circuit

ref

=2.5 V

a) Adjustment by means of an external resistor Rext.

Programming of the output voltage by means of an external

resistor Rext1 is possible within a limited range of 100 to

105% Vo nom. Rext should be connected between pin 4 and

Vi –. The following table indicates suitable resistor values

for typical output voltages under nominal conditions (Vi nom,

Io = 0.5 Io nom), with paralleled outputs or equal load

conditions on each output.

Caution: Connection of Rext to Vi+ may damage the converter.

b) Adjustment by means of an external voltage source Vext.

For external output voltages in the range of 75 to 105%

Vo nom a voltage source Vext (0 to 20 V) is required,

connected to the Trim-input (pin 4) and Vi–. The table

below indicates typical Vo versus Vext values under

nominal conditions (Vi nom, Io = 0.5 Io nom), with paralleled

outputs or equal load conditions on each output. Direct

paralleling of the Trim-inputs of converters connected in

parallel is feasible.

Note: Applying a control voltage greater than 20 V will set the

converter into a hiccup mode.

Fig. 15

Output voltage adjust for double-output models

Table 6: Rext for Vo > Vo nom

approximate values (Vi nom, Io1, 2 = 0.5 Io1/2 nom)

Vo [% Vo nom]Rext [kW]

105 to 108 (107 typically) 0

105 1.5

104 5.6

103 12

102 27

101 68

100 ∞

Table 7: Vext for Vo = 75 to 105% Vo nom;

typical values (Vi nom, Io1, 2 = 0.5 Io1/2 nom)

Vo [% Vo nom]Vext [V]

≥105 0

102 1.6

95 4.5

85 9

75 13

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IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Electromagnetic Emissions

occur in many installations, but especially in battery-driven

mobile applications.

Electromagnetic Compatibility (EMC)

A suppressor diode together with an input filter form an effective

protection against high input transient voltages which typically

Fig. 16

Typical conducted emissions (quasi-peak) at the input at

Vi nom and Io nom according to EN 55011/22. Output leads 0.1

m, twisted. (40IMX7-15-15). External capacitor (1 µF ceramic

or film) required at the input for 70IMX7, 110IMX7 models.

Electromagnetic Immunity

Table 8: Immunity type tests

Phenomenon Standard Class Coupling Value Waveform Source Test In Per-

level mode1applied imped. procedure oper. form. 2

Electrostatic IEC/EN 2 contact discharge 4000 Vp1/50 ns 330 Ω10 positive and yes B

discharge 61000-4-2 3 air discharge 8000 Vp10 negative

to case 5discharges

Electromagnetic IEC/EN 3 3 antenna 10 V/m AM 80 % n.a. 80 – 1000 MHz yes A

field 61000-4-3 1 kHz

3 antenna 10 V/m PM, 50% duty n.a. 900 MHz yes A

cycle, 200 Hz

repetition frequ.

Electrical fast IEC/EN 4 direct +i/–i 4000 Vpbursts of 5/50 ns 50 Ω60 s positive, yes B

transients/burst 61000-4-4 5 kHz repet. rate, 60 s negative

transients with transients per

15 ms burst coupling mode

duration, and

300 ms period

Surges IEC/EN 3 4 +i/–i 2000 Vp1.2/50 µs 2 Ω5 pos. and 5 neg. yes B

61000-4-5 surges

RF conducted IEC/EN 3 +i /–i 3 VAC AM modul. 80% 50 Ω0.15 to 80 MHz yes A

immunity 61000-4-6 (140 dBµV) 1 kHz 150 Ω

1i = input, o = output

2Performance criterion: A = normal operation, no deviation from specifications, B = temporary deviation from specs possible.

3Corresponds to the railway standard EN 50121-3-2:2000, table 9.1

4External components required.

5R or Trim pin open, i pin connected with Vi–.

07023a

EN 55022 A

EN 55022 B

0.01

0.05

0.1

0.5

[dBµV]

0.02

Fig. 17

Typical radiated emissions at Vi nom, Io nom, measured

according to EN 55011/22 with an antenna (distance 10 m).

Output leads 0.1 m, twisted (70IMX-7-15-15).

100

200

300

[MHz]

[dBµV/m]

400

500

600

800

07024a

EN 55022 B

BCD20007 Rev AA Page 11 of 14 www.power-one.com

IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Immunity to Environment al Conditions

Table 9: Mechanical and climatic stress

Test Method Standard Test conditions Status

Cab Damp heat IEC/EN 60068-2-78 Temperature: 40 ±2 °C Converter

steady state MIL-STD-810D section 507.2 Relative humidity: 93 +2/-3 % not

Duration: 56 days operating

Ea Shock IEC/EN 60068-2-27 1 Acceleration amplitude: 100 gn = 981 m/s2Converter

(half-sinusoidal) MIL-STD-810D section 516.3 Bump duration: 6 ms operating

Number of bumps: 18 (3 each direction)

Eb Bump IEC/EN 60068-2-29 Acceleration amplitude: 40 gn = 392 m/s2Converter

(half-sinusoidal) MIL-STD-810D section 516.3 Bump duration: 6 ms operating

Number of bumps: 6000 (1000 each direction)

Fc Vibration IEC/EN 60068-2-6 Acceleration amplitude: 0.35 mm (10 to 60 Hz) Converter

(sinusoidal) 5 gn = 49 m/s2 (60 to 2000 Hz) operating

Frequency (1 Oct /min): 10 to 2000 Hz

Test duration: 7.5 h (2.5 h each axis)

Fh Vibration, IEC/EN 60068-2-64 Acceleration spectral density: 0.05 gn2/Hz Converter

broad-band Frequency band: 10 to 500 Hz operating

random Acceleration magnitude: 4.9 gn rms

(digital control) Test duration: 3 h (1 h each axis)

Kb Salt mist, cyclic IEC/EN 60068-2-52 Concentration: 5% (30 °C) Converter

(sodium chloride Duration: 2 h per cycle not

NaCl solution) Storage: 40 °C, 93% rel. humidity operating

Storage duration: 22 h per cycle

Number of cycles: 3

Table 10: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar)

Temperature -9 -8 (Standard)

Characteristics Conditions min max min max Unit

TAAmbient temperature Operational 1 –40 71 –40 85 °C

TCCase temperature –40 95 –40 105

TSStorage temperature Non operational –55 100 –55 105

1 See Thermal Considerations

Table 11: MTBF and device hours

MTBF Ground benign Ground fixed Ground mobile

TC = 40 °C TC = 40 °C TC = 70 °C TC = 50 °C

40IMX7-05-8 (MIL-HDBK-217F) 1 672 000 h 248 000 h 83 800 h 84 800 h

40IMX7-15-15-8 (MIL-HDBK-217F) 1 640 000 h 214 000 h 83 000 h 77 000 h

Temperatures

1Covers also EN50155/ EN61373 category 1, class B, body mounted (= chassis of coach)

Failure Rates

BCD20007 Rev AA Page 12 of 14 www.power-one.com

IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Mechanical Data

Dimensions in mm.

Weight: <20 g

Fig. 18

Case IMX7 with standard

pinout

Fig. 19

Open frame (option Z)

Safety and Inst allation Instructions

Installation Instruction

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.

Connection to the system shall be made via a printed circuit

board; see Mechanical Data.

The converters should be connected to a secondary circuit.

Do not open the converter.

Ensure that a converter failure does not result in a hazardous

condition.

To prevent excessive current flowing through the input lines in

case of a short-circuit, an external fuse specified in section

Input Fuse and Reverse Polarity Protection should be installed

in the non-earthed input supply line.

European

Projection

50.8 (2")

3.81(0.15")

5 × 3.81

(0.15")

20.3 (0.8")

3 × 5.08 (0.2")

PT 2.2

self tapping screws

410

0.8 × 1.2 (0.03 × 0.05") pins

∅ 1.6 (0.06) PCB holes

10.5

(0.41")

3.4 (0.13")

45.7 (1.8")

25.4 (1")

4.6 (0.18")

S09030a

Measuring point

of case temperature T

Pin Allocation

Fig. 20

Footprint

Table 12: Pin allocation (standard pinout and option Z)

Pin Single output Double output

1Vi+ Vi+

2Vi– Vi–

3i i

4 n.c. Trim

10 Vo– Vo1–

11 Vo+ Vo1+

12 Vo– Vo2–

13 R Vo2+

14 n.c. n.c.

Bottom view

410

10011

311

43.2 (1.7")

S90002a

48 (1.9")

5 x 3.81

(0.15")

1.27 (0.05")

23 (0.9")

8.25

(0.32")

3 x 5.08

(0.2")

410

3.5 (0.14")

1.2 (0.5")

BCD20007 Rev AA Page 13 of 14 www.power-one.com

IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

Standards and Approvals

The converters are approved by UL and TÜV according to UL

60950, CAN/CSA C22.2 No. 950-95 and IEC/EN 60950-1:2000.

The converters have been evaluated for:

• Building in

• Supplementary insulation input to output, based on their

maximum input voltage

• Pollution degree 2 environment

• Connecting the input to a secondary circuit, which is

subject to a maximum transient rating of 1500 V for 20IMX4

and 40IMX7, 2000 V for 70IMX7, and 2500 for 110IMX7

models.

The converters are subject to manufacturing surveillance in

accordance with the above mentioned standards.

Railway Applications

To comply with railway standards, all components are coated

with a protective lacquer (except option Z).

Protection Degree

The protection degree of the converters is IP 30, except open-

frame models (option Z).

Cleaning Agents

In order to avoid possible damage, any penetration of cleaning

fluids should be prevented, since the power supplies are not

hermetical sealed.

However, the open-frame models (option Z) leave the factory

unlacquered and may be cleaned and lacquered by the

customer, for instance together with the mother board. Consult

Power-One for suitable cleaning agents.

NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical

components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written

consent of the respective divisional president of Power-One, Inc.

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.

Description of Options

Option Z: Open Frame

For applications, where the protection of the case is not

necessary or in the case that the motherboard should be

cleaned and lacquered with the converter fitted.

Table 12: Electric strength test voltages

Characteristic Input to output

20/40IMX 70IMX 110IMX o/o1Unit

Factory test >1 s 1.2 1.5 2.0 0.1 kVAC

Equivalent DC volt. 1.5 2.0 2.5 0.15 kVDC

Coupling 1.2 1.2 1.2 - nF

capacitance

Insulation resist. >100 >100 >100 - MΩ

at 500 VDC

1Between outputs of double-output models

Isolation

The electric strength test is performed in the factory as routine

test in accordance with EN 50116 and IEC/EN 60950, and

should not be repeated in the field. Power-One will not honor

any warranty claims resulting from electric strength field tests.

BCD20007 Rev AA Page 14 of 14 www.power-one.com

IMX7 DC-DC Series Data Sheet

7-Watt DC-DC Converters

EC Declaration of Conformity

Power-One AG

Ackerstrasse 56, CH-8610 Uster

declare under our sole responsibility that IMX7 Series DC-DC converters carrying the CE-

mark are in conformity with the provisions of the Low Voltage Directive (LVD) 73/23/EEC of

the European Communities.

Conformity with the directives is presumed by conformity with the following harmonised

standards:

·EN 61204:1995 (= IEC 61204:1993, modified)

Low-voltage power supply devices, DC output - Performance characteristics

and safety requirements

·EN 60950-1:2000 (= IEC 60950-1:2000)

Safety of information technology equipment.

The installation instructions given in the corresponding data sheet describe correct installation

leading to the presumption of conformity of the end product with the LVD. All IMX7 DC-DC

converters are components, intended exclusively for inclusion within other equipment by an

industrial assembly operation or by professional installers. They must not be operated as

standalone products.

Hence conformity with the Electromagnetic Compatibility Directive 89/336/EEC (EMC Directive)

needs not to be declared. Nevertheless, guidance is provided in the data sheets on how

conformity of the end product with EMC standards under the responsibility of the installer can

be achieved, from which conformity with the EMC Directive can be presumed.

Uster, 10 June 2006 Power-One AG

Rolf Baldauf Johann Milavec

Vice President Engineering Director Projects and IP