40IMX35-03D12-9Z - Power-One - Datasheet.Directory

AUG 13, 2002 Rev 1.0 Page 1 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Wide input voltage ranges up to 150 V DC

2...4 outputs up to 60 V DC

1500 V DC I/O electric strength test voltage

• Extremely wide input voltage ranges

• Electrical isolation I/O, also between outputs

• Emissions below EN 55022, level B

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

• Programmable input undervoltage lock-out

• Shut down/inhibit input

• Output voltages adjustable with flexible load

distribution

• Frequency synchronisation

• Outputs no-load, overload and short-circuit proof

• Operating ambient temperature from –40...110°C

• Thermal protection

•3" x 2.5" case with 10.5 mm profile or 8.9 mm open

frame

• Basic insulation

• Flexible output possibilities between 3.3 V & 60 V

Summary

The IMX 35 series of board mountable 35 W att DC-DC con-

verters has been designed according to industry require-

ments and standards. The converters are particularly suit-

able for use in mobile or stationary applications in trans-

port, railways, industry, or telecommunication where vari-

able input voltages or high transient voltages are prevalent.

Covering a total input voltage range from 9 V up to 150 V

with 4 different types. The units are available with up to

quadruple outputs (electrically isolated) from 3.3 V up to

60V externally adjustable and with flexible load distribution.

A shut down input allows remote converter on/of f. Features

include consistently high efficiency over the entire input

voltage range, high reliability and excellent dynamic re-

sponse 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. LGA, UL and cUL approvals are in

progress. The IMX 35 types provide basic insulation.

The circuit comprises of two planar magnetics devices and

all components are automatically assembled and solidly

soldered onto a single PCB without any wire connection.

Magnetic feedback ensures maximum reliability and

repeatability in the control loop over all operating condi-

tions. Careful considerations of possible thermal stresses

ensure the absence of hot spots providing long life in envi-

ronments where temperature cycles are a reality. The ther-

mal design without using any potting material allows opera-

tion at full load up to an ambient temperature of 71 °C in

free air , operation to 1 10°C with airflow . For extremely high

vibration environments the case has holes for screw

mounting. Inhibit or open frame mounting provide a high

level of application specific engineering and design-in flex-

ibility.

Safety according to IEC/EN 60950, UL 1950

Approvals pending

Table of Contents Page

Summary.......................................................................... 1

Type Survey and Key Data .............................................. 2

Type Key .......................................................................... 2

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

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

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

Page

Auxiliary Functions........................................................... 9

Electromagnetic Compatibility (EMC) ............................ 11

Immunity to Environmental Conditions .......................... 1 2

Mechanical Data ............................................................ 1 3

Safety and Installation Instructions ................................ 14

Description of Option ..................................................... 1 5

76.2

3.5

.5"

10.5

0.41

72.8

2.87"

7.8

.88"

8.9

0.35

AUG 13, 2002 Rev 1.0 Page 2 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Type Survey and Key Data

Table 1: Type survey

Output 1 Output 2 Output 3 Output 4 Input voltage Eff. Type Trim1Opt.2

Vo nom Io nom Vo nom Io nom Vo nom Io nom Vo nom Io nom Vi min...Vi max ηtyp designation

[V DC] [A] [V DC] [A] [V DC] [A] [V DC] [A] [V DC] [%]

3.3 4.15 5 1.35 5 1.35 - - 18...75 81 40 IMX 35-03D05-9 -8

3.3 4.15 12 0.7 12 0.7 - - 18...75 83 40 IMX 35-03D12-9 second. i

3.3 4.15 15 0.6 15 0.6 - - 18...75 84 40 IMX 35-03D15-9 Z

5.1 3.25 5 1.4 5 1.4 - - 18...75 82 40 IMX 35-05D05-9 -8

5.1 3.25 12 0.7 12 0.7 - - 18...75 83 40 IMX 35-05D12-9 second. i

5.1 3.25 15 0.6 15 0.6 - - 18...75 84 40 IMX 35-05D15-9 Z

5 1.35 5 1.35 5 1.35 5 1.35 9...36 86 20 IMX 35 D05D05-9 -8

5 1.4 5 1.4 5 1.4 5 1.4 18...75 87 40 IMX 35 D05D05-9 primary i,Z

5 1.4 5 1.4 5 1.4 5 1.4 40...121 86 70 IMX 35 D05D05-8 i

5 1.4 5 1.4 5 1.4 5 1.4 60...150 86 110 IMX 35 D05D05-8 Z

12 0.65 12 0.65 12 0.65 12 0.65 9...36 86 20 IMX 35 D12D12-9 -8

12 0.7 12 0.7 12 0.7 12 0.7 18...75 88 40 IMX 35 D12D12-9 primary i,Z

12 0.7 12 0.7 12 0.7 12 0.7 40...121 88 70 IMX 35 D12D12-8 i

12 0.7 12 0.7 12 0.7 12 0.7 60...150 88 110 IMX 35 D12D12-8 Z

15 0.55 15 0.55 15 0.55 15 0.55 9...36 88 20 IMX 35 D15D15-9 -8

15 0.6 15 0.6 15 0.6 15 0.6 18...75 89 40 IMX 35 D15D15-9 primary i,Z

15 0.6 15 0.6 15 0.6 15 0.6 40...121 88 70 IMX 35 D15D15-8 i

15 0.6 15 0.6 15 0.6 15 0.6 60...150 88 110 IMX 35 D15D15-8 Z

5 1.35 12 0.65 12 0.65 5 1.35 9...36 88 20 IMX 35 D05D12-9 -8

5 1.4 12 0.7 12 0.7 5 1.4 18...75 89 40 IMX 35 D05D12-9 primary i,Z

5 1.4 12 0.7 12 0.7 5 1.4 40...121 88 70 IMX 35 D05D12-8 i

5 1.4 12 0.7 12 0.7 5 1.4 60...150 88 110 IMX 35 D05D12-8 Z

5 1.35 15 0.55 15 0.55 5 1.35 9...36 88 20 IMX 35 D05D15-9 -8

5 1.4 15 0.6 15 0.6 5 1.4 18...75 89 40 IMX 35 D05D15-9 primary i,Z

5 1.4 15 0.6 15 0.6 5 1.4 40...121 88 70 IMX 35 D05D15-8 i

5 1.4 15 0.6 15 0.6 5 1.4 60...150 88 110 IMX 35 D05D15-8 Z

1 The Trim input (pin 5) on the primary side influences all outputs simultaneously on equal voltage types (eg D12D12) for unequal voltages (eg D05D12) it

only influences the power train Vo1/Vo4, while Trim1 (pin 18) on the secondary side influences the first output (Vo1) only.

2 For minimum quantity contact Power-One, not all options immediately available.

TYPE KEY 20 IMX 35 D05 D05 -9 i Z

Input voltage range Ui

9...36 V DC ........................................... 20

18...75 V DC ........................................... 40

40..121V DC ........................................... 70

60..150V DC ......................................... 110

Series......................................................................IMX 35

Output 1 of triple types...........................................-03, -05

Output 1 & 4 of quad types1................................. D05, D12, D15

Output 2 & 3 of quad types1................................. D05, D12, D15

Operating ambient temperature range TA

–40...71°C................................................... -9

–40...85°C (110°C ) .................................... -8

Options: Inhibit ........................................................... -i

Open frame.................................................. Z

1 Dual output models can be achieved by paralleling outputs

AUG 13, 2002 Rev 1.0 Page 3 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Functional Description

The IMX35 family of DC-DC converters consists of two

feedback controlled interleaved switching flyback power

trains using current mode PWM (pulse width modulation).

Functionally the converters are of two main types.

The triple output types consist of 3 outputs Vo1, Vo2, Vo3.

Vo1 (3.3 V or 5.1 V) is generated by a power train using

synchronous rectifier technology thus enabling high effi-

ciency. Also there is active magnetic feedback on this out-

put via a pulse transformer which results in very tight and

reliable regulation of the output voltage. The other two out-

puts Vo2 and Vo3 are electrically isolated double outputs.

Vo2, V o3 are restricted to being of the same output voltage

(i.e. D05, D12, etc.). Voltage regulation is achieved with a

passive transformer feedback from the main transformer

of that power train.

Adjustment of the output 1 (Vo1) is provided by the Trim1

pin referenced to the secondary side and allows for pro-

gramming of the voltage of output 1 in the range of approx.

90...105% of Vo nom. (See: Block diagram, triple output

types)

The quadruple output type consists of 4 outputs and two

power trains. Vo1, V o4 derive from the first power train and

Vo2, Vo3 from the second one (thus each pair of outputs is

independent from the other one). Voltage regulation for

each pair of outputs is achieved with passive transformer

feedback from the main transformer of each power train.

Each pair of output s are restricted to being of the same out-

put voltage type (i.e. D05, D12, etc.). If both power trains

have the same output voltage, all outputs may be adjusted

by means of the Trim input. (In case of different output volt-

ages, the Trim1 input influences only Vo1 and Vo4. See:

Block diagram, quadruple output types.)

The dual output types consist of two electrically isolated

outputs Vo1, Vo2. Vo1 and Vo2 derives from two power

trains and are electrically isolated. Voltage regulation for

each output is achieved with passive transformer feedback

from the main transformer of each power train. Adjustment

of the outputs voltages in the range of 90...105% of Vo nom is

possible via Trim input on the primary side.

PWM

Vi+

rim

Ref

Vi—

Vo4

—

Vo1

—

Vo4

Vo2

—

Vo3

—

03098

n.c.

n.c

Fig. 2

Block diagram, quadruple output types

PWM

Vi+

Vo1+

Vo1—

Trim1

03097a

.c.

Control

Vi—

Vo2+

Vo2—

Vo3+

Vo3—

.c.

19 n.c.

16 n.c.

Fig. 1

Block diagram, triple output types

Current limitation is provided by the primary circuit for each

power train 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 60% of Vo nom , the entire converter will shut

down and automatically restart in short intervals.

Overtemperature protection is provided, this will shut down

the converter in excessive overload conditions with auto-

matic restart approximately in short intervals.

AUG 13, 2002 Rev 1.0 Page 4 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Electrical Input Data

General conditions:

TA = 25°C, unless TC is specified; Shut down pin left open circuit (not connected);Trim not connected.

Table 2: Input Data

Input 20 IMX 40 IMX

Characteristics Conditions min typ max min typ max Unit

ViInput voltage range 1TA min...TA max 9 2 36 18 2 75 V DC

Vi nom Nominal input voltage Io = 0...Io nom 20 40

Vi sur Repetitive surge voltage Abs. max input (3 s) 40 100

tstart up Converter Switch on Worst case condition at 0.25 0.5 0.25 0.5 s

start-up time 2 SD high Ui min and full load 0.1 0.1

trise Rise time 3 Ui nom resist load 3 3 m s

Io nom capac. load 6 12 6 12

Ii o No load input current Io = 0, Ui min...Ui max 70 50 mA

Iirr Reflected ripple current Io = 0...Io nom 30 30

Iinr p Inrush peak current 4 Ui = Ui nom 89A

CiInput capacitance for surge calculation 2 1.3 µF

USD Shut down voltage Unit shut down –10...0.7 –10...0.7 V DC

Unit operating open circuit or 2...20 open circuit or 2...20

RSD Shut down input resistance For current calculations approx. 10 approx. 10 k Ω

ISD Input current if unit Ui min...Ui max 12 6 mA

shut down

fsSwitching frequency Ui min...Ui max, Io = 0...Io nom approx. 220 approx. 220 kHz

ui RFI Input RFI level, conducted EN 55022 5 B 6 B6

Input 70 IMX 110 IMX

Characteristics Conditions min typ max min typ max Unit

ViInput voltage range 1TA min...TA max 40 2 121 602150 V DC

Vi nom Nominal input voltage Io = 0...Io nom 70 110

Vi sur Repetitive surge voltage Abs. max input (3 s) 150 170

tstart up Converter Switch on Worst case condition at 0.25 0.5 0.25 0.5 s

start-up time 2 SD high Ui min and full load 0.1 0.1

trise Rise time 3 Ui nom resist load 3 3 m s

Io nom capac. load 6 12 6 12

Ii o No load input current Io = 0, Ui min...Ui max 30 20 mA

Iirr Reflected ripple current Io = 0...Io nom 30 30

Iinr p Inrush peak current 4 Ui = Ui nom 77A

CiInput capacitance for surge calculation 0.5 0.5 µF

USD Shut down voltage Unit shut down –10...0.7 –10...0.7 V DC

Unit operating open circuit or 2...20 open circuit or 2...20

RSD Shut down input resistance For current calculations approx. 10 approx. 10 k Ω

ISD Input current if unit Ui min...Ui max 3.5 4 mA

shut down

fsSwitching frequency Ui min...Ui max, Io = 0...Io nom approx. 220 approx. 220 kHz

ui RFI Input RFI level, conducted EN 55022 5 B 6 B 6

1Vi 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.

2Input undervoltage lock-out at typ. 85% of Ui min.

3Measured with resistive and max. admissible capacitive load.

4Source impedance according to ETS 300132-2, version 4.3.

5Measured with a lead length of 0.1 m, leads twisted.

6External capacitor required.

AUG 13, 2002 Rev 1.0 Page 5 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Inrush current

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.

I [A]

t [µ

0402

010 20 30 40 50 60 70 80 90 100

Fig. 3

Typical inrush current at Ui nom, Po nom versus time

(40 IMX 35). Source impedance according to

prETS 300132-2, version 4.3 at Vi nom .

Fig. 4

Converter start-up and rise time

o nom

start up

rise

04008

Input Transient Voltage Protection

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.

Table 4: Built-in transient voltage suppressor

Type Breakdown Peak power Peak pulse

voltage at 1 ms current

VBr nom [V] Pp [W] Ipp [A]

20 IMX 35 39 1500 22

40 IMX 35 100 1500 9.7

70 IMX 35 151 600 2.9

110 IMX 35 176 600 2.5

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.

Note: The suppressor diode D is only necessary for

20 IMX 35 types.

Table 5: Components for external circuitry for IEC/EN

61000-4-5, level 2 or ETR 283 (19Pfl1) compliance.

Type Inductor (L) Capacitor (C) Diode (D)

20 IMX 35 22 µH/5A 470 µF/40 V 1.5 k E47A

40 IMX 35 68 µH/2.7 A 2 x 100 µF/100 V -

70 IMX 35 100 µH/1 A 2 x 82 µF/200 V -

110 IMX 35 150 µH/0.8 A 2 x 82 µF/200 V -

Vi+

Vi–

0403

Fig. 5

Example for external circuitry to comply with IEC/EN

61000-4-5 or ETR 283 (19Pfl1); the diode D is only neces-

sary for 20 IMX 35 types.

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.

Table 3: Recommended external fuses

Converter type Fuse type

20 IMX 35 F8.0A

40 IMX 35 F4.0A

70 IMX 35 F2.0A

110 IMX 35 F1.5A

AUG 13, 2002 Rev 1.0 Page 6 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Electrical Output Data

General conditions:

– TA = 25°C, unless TC is specified

– Shutdown pin left open circuit (not connected)

– Trim not connected

Table 6a: Output data for single synchronous rectifier (main) output. [only 40IMX35-03 & 40IMX35-05 triple output units]

Output 3.3 V 5.1 V

Characteristics Conditions min typ max min typ max Unit

UoOutput voltage Ui nom, Io = 0.5 Io nom 3.28 3.32 5.07 5.13 V DC

Io nom Output current 4.15 3.3 A

Io1L Current limit 1 Ui nom, TC = 25°C 5.5 4.6

Io2L Uo1 = 93% Uo nom

∆Uo U Line/load regulation Ui min...Ui max,±1±1%

Io = (0.05...1) • Io nom

uo1/2 Output voltage noise Ui min...Ui max 270 80 mVpp

Io = Io nom 340 40

Uo L Output overvoltage limit. 4 115 130 115 130 %

Co ext Admissible capacitive load 3900 2700 µF

uo d Dynamic Voltage deviat. Ui nom ±250 ±250 mV

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

regulation IEC/EN 61204

αUo Temperature coefficient Ui min...Ui max ±0.02 ±0.02 %/K

∆Uo/∆TCIo = 0...Io max

Table 6b: Output data for double output power trains. (Vo1/Vo4 or Vo2/Vo3, i.e. each output train has two outputs)

Output 2 x 5 V 2 x 12 V 2 x 15 V

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

Uo1 Output voltage Ui nom 4.95 5.05 11.88 12.12 14.85 15.15 V DC

Uo2 Io = 0.5 Io nom 4.94 5.06 11.86 12.14 14.82 15.18

Io nom Output current 20 IMX Ui min...Ui max 2 x 1.35 2 x 0.65 2 x 0.55 A

40 IMX 2 x 1.4 2 x 0.70 2 x 0.60

70 IMX 2 x 1.4 2 x 0.70 2 x 0.60

110 IMX 2 x 1.4 2 x 0.70 2 x 0.60

IoL Current limit 1 20 IMX Ui nom, TC = 25°C 3.5 1.8 1.5

40 IMX Uo = 93% Uo nom 3.8 2.0 1.7

70 IMX 3.8 2.0 1.7

110 IMX 3.8 2.0 1.7

∆Uo U Line regulation Ui min...Ui max, Io nom ±1 ±1 ±1 %

∆Uo l Load regulation Ui nom ±3 ±3 ±3

Io = (0.1...1) Io nom

uo1/2 Output voltage noise Ui min...Ui max 280 120 150 mVpp

Io = Io nom 340 60 70

Uo L Output overvoltage limit. 4 Min. load 1% 115 130 115 130 115 130 %

Co ext Admissible capacitive load 4000 470 330 µF

uo d Dynamic Voltage deviat. Ui nom ±250 ±480 ±520 mV

tdload Recovery time Io nom × 1/2 Io nom 0.75 0.75 0.75 ms

regulation

αUo Temperature coefficient Ui min...Ui max ±0.02 ±0.02 ±0.02 %/K

∆Uo/∆TCIo = 0...Io max

1The 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).

2BW = 20 MHz

3Measured with a probe according to EN 61204

4The overvoltage protection is via a primary side second regulation loop, not tracking with Trim control.

AUG 13, 2002 Rev 1.0 Page 7 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Output Power Vs AmbientTemp. and Airflow (-8 version)

100

120

-40

-20

100

110

Ambient Temperature (deg °C)

Output Power (%)

200LFM (0.5 m/s)

0 LFM

Thermal Considerations

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 the surfaces and 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.

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 inst aller must ensure that

under all operating conditions TC remains within the lim-

its stated in the table: Temperature specifications.

Option -8

Extended Temperature Range

Extension of the temperature range from standard

–40...71°C to –40...85°C (upto 110°C). The modules will

provide the specified ouptut power with free air convection

cooling. In the upper temperature range the output power

derating below should be observed.

Fig. 6

Maximum allowed output power versus ambient tempera-

ture.

Short Circuit Behaviour

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).

Overtemperature Protection

The converter is protected against possible overheating by

means of an internal temperature monitoring circuit. It

shuts down the unit above the internal temperature limit

and attempts to automatically restart. This feature prevent s

excessive internal temperature building up which could oc-

cur under heavy overload conditions.

Connection in Series

The outputs of one or several single or double output power

trains may be connected in series without any precautions.

Connection in Parallel

Several 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.

NOTE: A separate application note is available for uses

when all outputs are paralleled together.

Parallel operation of several converters with the same out-

put 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 is required in true

redundant systems. It is recommended not to parallel more

than three units at full load.

The first outputs (main output of 5.1V or 3.3V) of triple out-

put units should not be p aralleled, except in true redundant

systems using decoulping diodes.

AUG 13, 2002 Rev 1.0 Page 8 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

1.0

1.5

2.0

2.5

3.0

3.5

[V]

0.06 0.20 0.30 0.40 0.50 0.60 0.70 I

[

0.10

05164

= 0.35 A

= 0.035 A

Fig. 9

Cross load regulation Uo4 versus Io1 (typ) for various Io4 for

Vo1, Vo4 on power train 1. See: Block diagram dual out-

put types. (20 IMX 35 D12D12-9)

Fig. 10

Flexible load distribution on power train 1 of

40 IMX 35 D12D12-9 (4 x 12 V) with load variation from

0...150% of Po1 nom on output 1 (Vo1). Output 2 (Vo4)

loaded with 50% of Po4 nom.

, U

[V]

o1 nom

05039

002550 75 100 150 [%

]

125

h [%]

50 75 100 Po

Po total

05152

]

Ui min Ui nom

h [%]

50 75 100 Po

Po total

05153

]

Ui min

Ui nom

Fig. 11

Efficiency versus input voltage and load. Typical values

40 IMX 35 D12D12-9

Fig. 12

Efficiency versus input voltage and load. Typical values

20 IMX 35 D12D12-9

Uo [%]

t [m

0504

8.5

60.5

overload short circuit condition

switch-off

Fig. 13

Overload switch off (hiccup mode), typical values.

Fig. 7

Uo versus Io (typ) of units with Uo = 5.1 V.

(40 IMX 35-05D12-9).

Fig. 8

Uo1/2 versus Io1/2 of double output power trains

(i.e. 2 x 12 V). See: Block diagram 1

.0 012345I

[

[V]

05019

[V]

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 I

o total

]

05020

Typical Performance Curves

General conditions:

– TA = 25°C, unless TC is specified.

– Shut down pin left open circuit.

– Trim input not connected.

AUG 13, 2002 Rev 1.0 Page 9 of 15

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IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Auxiliary Functions

Adjustable Output Voltage

As a standard feature, the IMX 35 offer adjustable output

voltages in the range 90...105% of Vo nom by use of a con-

trol pin. The T rim control is offered either on primary or sec-

ondary side of the converter depending on type.

Vo1+

Vi+

Vi– Vo1–

06136

Trim1 R

Fig. 14

Output voltage control for the Trim1 input referenced to

the secondary side.

Table 7: Vo1 versus Rext for Vo1 = 90...105% Vo nom; typical

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

Vo nom Rext1 Rext2

[V] Vo1 [V] [kΩ]Vo1 [V] [kΩ]

3.3 2.97 1.8 3.3 ∞

3.135 4.7 3.47 11

3.673 5

5.1 4.59 2.2 5.1 ∞

4.84 9.1 5.25 8.5

5.0 33 5.35 3

Adjustment by means of an external resistor Rext:

Adjustment of the output voltage by means of an exter-

nal resistor Rext is possible within the range of

100...105% of Vo nom. Rext should be connected between

Trim (pin 5) and Vi– (pin 2). Connection of Rext to Vi+

may damage the converter . The following t able indicates

suitable resistor values for typical output voltages under

nominal conditions (Vi nom, Io = 0.5 Io nom).

Adjustment by means of an external voltage source Vext

For external output voltage adjustment in the range

85...105% of Vo nom a (0...20 V) source Vext is required,

connected to the T rim (pin 5) and V i–. The t able below in-

dicates typical Vo versus Vext values. Applying a control

voltage 15...20 V will set the converter into a hiccup

mode. Direct paralleling of the Trim pins of units of the

same type connected in parallel is feasible.

Table 9: Vo versus Vext for Vo = 85...105% Vo nom;

typical values (Vi nom, Io = 0.5 Io nom)

Uo [% Uo nom]Uext [V]

Trim [V] Trim 1/4 [V]

>105 0 0

102 1.8 1.5

100 2.5 2.5

95 4.3 4.25

90 6.2 6.2

85 8 8

Table 8: Rext1 for Vo > Vo nom;

approximate values (Vi nom, Io = 0.5 Io nom)

Vo [% Vo nom]Rext [kΩ]

Trim [kΩ] Trim 1/4 [kΩ]

105...108 (107 typically) 0 0

105 10 17

102 62 110

100 ∞∞

The quadruple output units are shown in block diagram (fig.

2). All types with equal output voltage have the Trim func-

tion connected to pin 5 referenced to the primary side

which influences all outputs simultaneously. The schemat-

ics are shown in fig. 15, the values of the adjust resistor Rext

in Table 8 and the external voltage source in Table 9.

Trim

Vo1+

Vo2–

Uext

–

Vi+

Vi–

Rext

Vo1–

Vo2+

06137

Control

circuit

ref

= 2.5 V

Fig. 15

Output voltage control for Quad (double) output units by

means of the Trim input on the primary side.

Block diagram (fig. 1) shows the triple output units. They of-

fer a Trim1 input (pin 18) on the secondary side to adjust

Vo1. The other outputs remain unchanged.

The IMX 35 triple output feature a main power train with

magnetic feedback and synchronous rectifier. The simpli-

fied circuit is shown in Fig. 14.

The Trim1 (pin 18) is secondary referenced and influences

only the main power train. Adjustment of the output voltage

is possible by means of an external resistor Rext between

the Trim1 pin and either Vo1+ or Vo1–. If the control input

is left open circuit, the output voltage is set to Vo1 nom.

Table 7 lists typical values required to program the output

voltage to approximately the values of Vo1 indicated.

Triple output adjustment

Quad output adjustment

AUG 13, 2002 Rev 1.0 Page 10 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Programmable Input Undervoltage Lockout PUL

A special feature of these units is the accurate

undervoltage lockout protection which protects the unit

(and the system) from large currents caused by operation

at low voltages. This ensures easier start-up in distributed

power systems.

Table 10: Turn on and turn off voltage

Type Trigger level Hysteresis Units

20 IMX 35 7...8 <0.5 V

40 IMX 35 14...15.5 <1

70 IMX 35 31 ... 34 <3

110 IMX 35 42 ...50 <8

See: Electrical input data for a description of the turn on

turn off voltage levels of the various types.

The under voltage lockout levels may be programmed by

use of an external resistor to Trim up the preset levels as

indicated in the table below.

Table 11: Typical values for Rext and the respective lock-

out voltage for input voltage.

20 IMX 35 40 IMX 35

RPUL [kΩ]Ui min [V] Rext [kΩ]Umin [V]

∞≤8∞≤15.5

39 10 43 22

19 12 16 26

13 14 10 28

9.1 16 0 32

70 IMX 35 110 IMX 35

RPUL [k

Ω

] Ui min [V] R ext [k

Ω

min [V]

∞31 ∞42

270 40 270 50

110 50 120 60

80 55 51 75

Synchronisation (W)

It is posible to synchronise the switching frequency of one

or more converters to an external symmetrical clocksignal.

Consult factory if this option is required, for full application

details.

This logic input can be used to synchronise the oscillator to

an external frequency source. This pin is edge triggered

with TTL thresholds, and requires a source frequency of

490...540 kHz (duty cycle 10...90 %). The external source

frequency is internally divided by 2 to define the switching

frequency for the converter. If unused, this pin can be con-

nected to V1– (pin 2) or left open-circuit.

Reference (Ref)

The signal output provides a stable 5 V (±0.1 V) reference

signal on pin Ref. It is protected by a 1 kΩ resistor . This sig-

nal may be used also in conjunction with the Trim input pin

5 (primary side) as a limited external voltage reference.

It is recommended to connect a filter capacitor (0.1 µF)

between Ref and Vi–, if Vref is used.

Shut Down Function

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.

Converter operating: 2.0...20 V

Converter shut down: –10...0.7 V

Option i

Inhibit (negative shutdown logic)

The output 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 8) should be connected to Vi– to enable the out-

put (active low logic, fail safe).

Converter operating: –10 V...0.8 V

Converter inhibited

or inhibit pin left open circuit: 2.4 V...20 V

Fig. 16

If the inhibit is not used the inhibit pin should be con-

nected to Vi–

Vi+

Vi–

0613

AUG 13, 2002 Rev 1.0 Page 11 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Electromagnetic Immunity

Table 12: Immunity type tests

Phenomenon Standard 1 Class Coupling Value Waveform Source Test In Per- 3

Level mode 2 applied Imped. procedure oper. form.

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

discharge 61000-4-2 (R pin open) 10 negative

to case 3 air discharge 8000 Vpdischarges

(R pin open)

Electromagnetic IEC/EN 3 antenna 10 V/m AM 80% 26…1000 MHz yes A

field 61000-4-3 1 kHz

ENV 50204 PM, 50% duty 900 MHz

cycle, 200 Hz

resp. frequ.

Electrical fast IEC/EN 4 direct +i/–i 4000 Vpbursts of 5/50 ns 50 Ω1 min positive yes B

transient/burst 61000-4-4 5 kHz rep. rate 1 min negative

transients with transients per

15 ms burst coupling mode

duration and a

300 ms period

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

61000-4-5 4 impulses per

coupling mode

EN 50155 D 1800V 5/50 µs 100 Ωtriangular yes B

G 8400V .05/01 µs

Conducted IEC/EN 3 +i/–i 10 Vrms AM modulated 50 Ω0.15...80 MHz yes A

disturbancies 61000-4-6 (140 dBµV) 80%, 1 kHz 150 Ω

1Related and previous standards are referenced in: Technical Information: Standards.

2i = input, o = output.

3A = normal operation, no deviation from specification, B = temporary deviation from specs. possible.

4External components required.

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 ef-

fective protection against high input transient voltages

Fig. 17

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 35 D12D12-9)

Electromagnetic Emission

07020

EN 55022 A

EN 55022 B

.01

.05

0.1

0.5

[

dBµV]

.02

AUG 13, 2002 Rev 1.0 Page 12 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Table 16: Environmental testing

Test Method Standard Test Conditions Status

Ca Damp heat IEC/DIN IEC 60068-2-3 Temperature: 40 ±2 °C Unit not

steady state MIL-STD-810D section 507.2 Relative humidity: 93 +2/-3 % operating

Duration: 56 days

Ea Shock IEC/EN/DIN EN 60068-2-27 Acceleration amplitude: 100 gn = 981 m/s2Unit

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

Number of bumps: 18 (3 each direction)

Eb Bump IEC/EN/DIN EN 60068-2-29 Acceleration amplitude: 40 gn = 392 m/s2Unit

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

Number of bumps: 6000 (1000 each direction)

Fc Vibration IEC/EN/DIN EN 60068-2-6 Acceleration amplitude: 0.35 mm (10...60 Hz) Unit

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

Frequency (1 Oct/min): 10...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 Unit

broad-band MIL-STD-810D section 514.3 Frequency band: 20...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/DIN IEC 60068-2-52 Concentration: 5% (30°C) Unit not

(sodium chloride Duration: 2 h per cycle operating

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

Storage duration: 22 h per cycle

Number of cycles: 3

CISPR 22/EN 55022, Level B Radiated

Electromagnetic emission requirements according to

EN 55022, class B (radiated) can be achieved by adding an

external common mode choke and (for 20 IMX 35 types) an

additional capacitor, see: Input Data. The filter component s

should be placed as close as possible to the input of the

converter.

Vi+

Vi–

–

Module

0711

Fig. 18

Example for external circuitry to comply with CISPR22/EN

55022, level B, radiated

Table 13: Input filter components for EN 55022, level B,

radiated.

Type Current compensated choke

20 IMX 35 Murata PLH1OA series 7003R6P02

40 IMX 35 Murata PLH1OA series 1612R1P02

70 IMX 35 Murata PLH1OA series 2911R2P02

110 IMX 35 Murata PLH1OA series 3711R0P02

Table 14: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar)

Temperature -8 3

Characteristics Conditions min max Unit

TAAmbient temperature 1 Operational 2 –40 852°C

TCCase temperature –40 110

TSStorage temperature 1 Non operational –55 110

1MIL-STD-810D section 501.2 and 502.2

2See: Thermal Considerations

3Start up at –55°C

Table 15: MTBF and device hours

MTBF (Standard) Ground Benign Ground Fixed Ground Mobile

40 IMX 35 (MIL-HDBK-217F) 336,000 hrs (TC = 40°C) 141,000 (TC = 40°C) 86,000 (TC = 70°C) 110,000 (TC = 50°C)

110 IMX 35 (Bellcore) 1,372,000 hrs @ 25°C at 100% load

Immunity to Environmental Conditions

AUG 13, 2002 Rev 1.0 Page 13 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Mechanical Data

Dimensions in mm. Tolerances ±0.3 mm unless otherwise indicated.

Fig. 19

Case IMX 35 (Standard)

Weight: 67 g

63.5

76.2

63.5

0.8 x 0.8

5.08

510.5

09121

69.6

56.9

thread M3

5.08

47.8

63.5

72.8

6.4 8.9

0.8 x 0.8

09123

Cores

Fig. 20

Case IMX 35 open frame (option Z)

Weight: 43 g

European

Projection

AUG 13, 2002 Rev 1.0 Page 14 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Safety and Installation Instructions

Installation Instructions

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.

Connection to the system shall be made via a printed cir-

cuit board with hole diameters of 1.5 mm for the pins.

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.

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 F8.0A for

20 IMX 35 types, F4.0 A for 40 IMX 35 types, F2.0 A for

70 IMX 35 types and F2.0 A for 110 IMX 35 types.

Standards and approvals

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.

The units have been evaluated for:

• Building in

• Basic insulation input to output, based on their maximum

input voltage

• 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

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.

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.

Table 17: Electric strength test voltages

Characteristic Input to output Output to Unit

IMX 35 output

Electric strength 1.2 kVrms

test voltage 1 s 1.5 0.2 kV DC

Insulation resistance >100 - MΩ

at 500 V DC

Partial discharge Consult factory - kV

extinction voltage

Table 18: Pin allocation

Pin No. Triple Quadruple

output output

1 PUL PUL

2Vi– Vi–

3 n.c. n.c.

4Vi+ Vi+

5 n.c. Trim or Trim1

6W W

7 Ref Ref

8 SD or i SD or i

11 Vo3– Vo3–

12 Vo3+ Vo3+

13 Vo2+ Vo2+

14 Vo2– Vo2–

15 Vo1– Vo1–

16 n.c. Vo1+

17 Vo1+ Vo4+

18 Trim1 Vo4–

19 n.c. n.c.

Fig. 21

Pin allocation

Protection Degree

The protection degree of the DC-DC converters is IP 30

(not for option Z).

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.

However, open cased units (option Z) which leave the fac-

tory unlacquered may be cleaned and lacquered by the

customer.

09122

Bottom

view

AUG 13, 2002 Rev 1.0 Page 15 of 15

www.power-one.com

IMX35 Series: 35W DC-DC Converters Product Specifications

9-36V, 18-75V, 40-121V & 60-150V Inputs Aug 2002

Dual/Triple/Quad Outputs 3.3V, 5V, 12V & 15V

Table 19: Insulation concept leading to an SELV output circuit

Conditions Front end DC-DC converter Result

Supply Minimum required grade Maximum Minimum required Type Measures to achieve the Safety status of

voltage of isolation, to be provided DC output safety status of the specified safety status of the DC-DC

by the AC-DC front end, voltage front end output the output circuit converter output

including mains supplied from the circuit circuit

battery charger front end 1

Mains Basic <60 V Earthed SELV circuit 2 IMX 35 Operational insulation SELV circuit

≤250 V AC (provided by the DC-DC

converter)

<75 V Hazardous voltage IMX 35 Input fuse 3 output sup- Earthed SELV

secondary circuit pressor diodes 4, and circuit

earthed output circuit 2

Safety of operator accessible output circuit

If the output circuit of a DC-DC converter is operator acces-

sible, it shall be an SELV circuit according to the IEC/EN

60950 related safety standards

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

IEC/EN 60950 up to a configured output voltage (sum of

nominal voltages if in series or +/– configuration) of 42 V.

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.

1The front end output voltage should match the specified input voltage range of the DC-DC converter.

2The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.

3The installer shall provide an approved fuse (type with the lowest 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.