20IMX35-03D05-8Y--Datasheet/数据表在线中文翻译

Board Mountable

DC-DC Converters

IMX 35 Series

35 Watt DC-DC Converters

IMX 35 Series

Wide input voltage ranges up to 75 V DC

2...4 isolated outputs up to 60 V DC

1500 V DC I/O electric strength test voltage

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

• Programmable input undervoltage lock-out

• Shut down input

• Output voltages adjustable with flexible load

distribution

10.5

0.41"

63.5

2.5"

76.2

3"

• Frequency synchronisation

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

• Operating ambient temperature up to –40...85^°C

• Thermal protection

• 3" × 2,5" case with 10.5 mm profile

or 8.9 mm profile open frame

• Supplementary insulation

Safety according to IEC/EN 60950, UL 1950

LGA

Approvals pending

8.9

0.35"

47.8

1.88"

72.8

2.87"

Summary

The IMX 35 series of board mountable 35 Watt DC-DC con-

verters has been designed according to the latest industry

requirements and standards. The converters are particu-

larly suitable for use in mobile or stationary applications in

transport, railways, industry, or telecommunication where

variable input voltages or high transient voltages are preva-

lent.

tion. Connected to a secondary circuit the 40 IMX 35 types

feature SELV outputs even if the voltage at the converter in-

put exceeds the SELV-limit of 60 V DC.

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 up to an ambient temperature of –40...85°C in free air.

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 flexibility.

Covering a total input voltage range from 9 up to 75 V with

2 different types. The units are available with double, triple

and quad outputs, electrically isolated, from 3.3 V up to 60

V externally adjustable and with flexible load distribution. A

shut down input allows remote converter on/off. 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 supplementary insula-

Table of Contents

Page

Auxiliary Functions ......................................................... 11

Electromagnetic Compatibility (EMC) ............................ 13

Immunity to Environmental Conditions........................... 14

Mechanical Data ............................................................ 15

Safety and Installation Instructions ................................ 16

Description of Option...................................................... 18

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

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

Type Key .......................................................................... 3

Functional Description...................................................... 4

Electrical Input Data ......................................................... 6

Electrical Output Data ...................................................... 8

Edition 5/08.2001 R1

1/18

Board Mountable

DC-DC Converters

IMX 35 Series

Type Survey and Key Data

Table 1: Type survey

Output 1

Output 2

Output 3

Output 4

Input voltage Eff.

Type

Trim ¹Opt. ²

U_{o nom}I_{o nom}U_{o nom}I_{o nom}U_{o nom}I_{o nom}U_{o nom}I_{o nom}

U_{i min}...U_{i max}h_typ

designation

[V DC]

[A]

[V DC]

[A]

[V DC]

[A]

[V DC]

[A]

[V DC]

[%]

5

2.7

2.8

5

2.7

2.8

-

9...36

18...75

84

20 IMX 35-05-05-8

40 IMX 35-05-05-8

primary

12

1.3

1.4

12

1.3

1.4

-

9...36

18...75

87

20 IMX 35-12-12-8

40 IMX 35-12-12-8

primary

15

1.1

1.2

15

1.1

1.2

-

9...36

18...75

87

20 IMX 35-15-15-8

40 IMX 35-15-15-8

primary

3.3

3.5

4.25

5

1.3

1.35

5

1.3

1.35

-

9...36

18...75

81

83

20 IMX 35-03D05-8 ³second. i, Y

40 IMX 35-03D05-8 ³second. i, Z

3.3

3.5

4.25

12

0.65

0.7

12

0.65

0.7

-

9...36

18...75

84

86

20 IMX 35-03D12-8 ³second. i, Y

40 IMX 35-03D12-8 ³second. i, Z

3.3

3.5

4.25

15

0.55

0.6

15

0.55

0.6

-

9...36

18...75

84

86

20 IMX 35-03D15-8 ³second. i, Y

40 IMX 35-03D15-8 ³second. i, Z

5.1

2.9

3.4

5

1.35

1.4

5

1.35

1.4

-

9...36

18...75

81

83

20 IMX 35-05D05-8 ³second. i, Y

40 IMX 35-05D05-8 ³second. i, Z

5.1

2.9

3.4

12

0.65

0.7

12

0.65

0.7

-

9...36

18...75

84

86

20 IMX 35-05D12-8 ³second. i, Y

40 IMX 35-05D12-8 ³second. i, Z

5.1

2.9

3.4

15

0.55

0.6

15

0.55

0.6

-

9...36

18...75

84

87

20 IMX 35-05D15-8 ³second. i, Y

40 IMX 35-05D15-8 ³second. i, Z

5

1.35

1.4

5

1.35

1.4

5

1.35

1.4

5

1.35

1.4

9...36

18...75

86

87

20 IMX 35 D05D05-8 primary

40 IMX 35 D05D05-8 primary

5

1.35

1.4

12

0.65

0.7

12

0.65

0.7

5

1.35

1.4

9...36

18...75

86

88

20 IMX 35 D05D12-8 primary

40 IMX 35 D05D12-8 primary

5

1.35

1.4

15

0.55

0.6

15

0.55

0.6

5

1.35

1.4

9...36

18...75

87

88

20 IMX 35 D05D15-8 primary

40 IMX 35 D05D15-8 primary

i, Z

12

0.65

0.7

12

0.65

0.7

12

0.65

0.7

12

0.65

0.7

9...36

18...75

87

89

20 IMX 35 D12D12-8 primary

40 IMX 35 D12D12-8 primary

15

0.55

0.6

15

0.55

0.6

15

0.55

0.6

15

0.55

0.6

9...36

18...75

88

89

20 IMX 35 D15D15-8 primary

40 IMX 35 D15D15-8 primary

¹For the units IMX 35-05-05, IMX 35-12-12, IMX 35-15-15 and all the quad versions with equal output voltages, the Trim input (pin 5) is

on the primary side and influences all outputs simultaneously while pin 18 is not connected. For the quad versions with unequal out-

put voltages (e.g. 40 IMX 35 D05D12-8) the Trim input (pin 5) influences only the first power train i.e. V₀₁and V₀₄. For the triple ver-

sions the Trim input (pin 18) is on the secondary side and influences the first output (V₀₁) only.

²For minimum quantity contact Power-One.

³For lead times contact Power-One.

Edition 5/08.2001 R1

2/18

Board Mountable

DC-DC Converters

IMX 35 Series

Type Key

Double output units

20 IMX 35 - 12 - 12 -8

Input voltage range U_i

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

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

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

Output 1 of double types (5, 12, 15 V) ............... 05, 12, 15

Output 2 of double types (5, 12, 15 V) ............... 05, 12, 15

Operating ambient temperature range T_A

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

Triple output units

40 IMX 35 - 05 D05 -8 i Z

Input voltage range U_i

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

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

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

Output 1 of triple types (3.3, 5 V) ............................. 03, 05

Output 2/3 of triple types (3.3, 5 V)............ D05, D12, D15

Operating ambient temperature range T_A

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

Options:

Inhibit ............................................................ i

Base plated open frame ..............................Y ¹

Open frame .................................................. Z ²

Quad output units

40 IMX 35 D05 D05 -8 i Z

Input voltage range U_i

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

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

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

Output 1/4 of quad types (5, 12, 15 V)....... D05, D12, D15

Output 2/3 of quad types (5, 12, 15 V) ...... D05, D12, D15

Operating ambient temperature range T_A

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

Options:

Inhibit ............................................................ i

Open frame .................................................. Z ²

¹20 IMX 35 triple output types.

²All models except 20 IMX 35-triple output types.

Edition 5/08.2001 R1

3/18

Board Mountable

DC-DC Converters

IMX 35 Series

Functional Description

The IMX 35 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 three main types. The

double output types consist of two electrically isolated out-

puts Vo1, Vo2. Vo1 and Vo2 derive 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 80...105% of U_{o nom}is pos-

sible by use of the Trim input on the primary side (See:

Block diagram, dual output types.)

The quad output type consists of 4 outputs and two power

trains. Vo1, Vo4 derive from the first power train and Vo2,

Vo3 from the second one (thus each pair of outputs is inde-

pendent from the other one). Voltage regulation for each

pair of outputs is achieved with passive transformer feed-

back from the main transformer of each power train. Each

pair of outputs are restricted to being of the same output

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 Trim1/4 input influences only Vo1 and Vo4. See:

Block diagram, quad output types.)

The triple output types consist of 3 outputs Vo1, Vo2 and

Vo3. Vo1 (3.3 or 5.1 V) is generated by a power train using

state of the art Schottky diode (20 IMX 35) or a synchro-

nous rectifier technology (40 IMX 35) thus enabling high ef-

ficiency. 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, Vo3 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 (U_o1) is pro-

vided by the Trim1 pin referenced to the secondary side

and allows for programming of the voltage of output 1 in the

range of approx. 80...105% of U_{o nom}. (See: 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 drop below

typically 60% of U_{o nom}, the entire converter will shut down

and automatically restart in short intervals.

Overtemperature protection is provided, which will shut

down the converter in excessive overload conditions with

automatic restart.

03100

Vi+

4

17

Vo1+

1

5

6

7

8

2

3

PUL

15

16

18

12

Vo1–

Trim

W

1

PWM

Ref

SD

1

Vi–

n.c.

13 Vo2+

14

11

n.c.

Vo2–

19

n.c.

¹Internally connected, leave open-circuit

Fig. 1

Block diagram 1, double output types

Edition 5/08.2001 R1

4/18

Board Mountable

DC-DC Converters

IMX 35 Series

03097

4

17

Vi+

Vo1+

n.c.

1

5

6

7

1

2

3

PUL

n.c.

W

16

15

Control

Vo1–

PWM

Ref

18

13

Trim1

Vo2+

SD

Vi–

n.c.

14

12

Vo2–

Vo3+

11

19

Vo3–

n.c.

Fig. 2

Block diagram 2, triple output types

03098

Vi+

4

16

Vo1+

1

5

6

7

8

2

3

PUL

15

Vo1–

Trim/Trim1/4

17 Vo4+

18 Vo4–

13 Vo2+

PWM

W

Ref

SD

Vi–

n.c.

14

12

Vo2–

Vo3+

11 Vo3–

19 n.c.

Fig. 3

Block diagram 3, quad output types

Edition 5/08.2001 R1

5/18

Board Mountable

DC-DC Converters

IMX 35 Series

Electrical Input Data

General conditions:

– T_A= 25°C, unless T_Cis specified.

– Shut down pin left open circuit (not connected).

– Trim not connected.

Table 2: Input Data

Input

20 IMX

40 IMX

Characteristics

Conditions

min

9 ²

typ

max

36

min

18 ²

typ

max

75

Unit

U_i

Input voltage range ¹

T_{A min}...T_{A max}

I_o= 0...I_{o nom}

V DC

U_{i nom}

U_{i sur}

t_{start up}

Nominal input voltage

20

40

Repetitive surge voltage

Abs. max input (3 s)

40

0.5

0.1

100

0.5

0.1

Converter

start-up time ²

Switch on

SD high

Worst case condition at

U_{i min}and full load

0.25

s

t_rise

Rise time ³

U_{i nom}resist load

I_{o nom}capac. load

I_o= 0, U_{i min}...U_{i max}

I_o= 0...I_{o nom}

5

ms

mA

10

20

70

30

8

10

20

50

30

9

I_{i o}

No load input current

Reflected ripple current

Inrush peak current ⁴

Input capacitance

I_irr

I_{inr p}

C_i

U_i= U_{i nom}

A

for surge calculation

Unit shut down

Unit operating

2

1.3

µF

U_SD

Shut down voltage

–10...0.7

V DC

open-circuit or 2...20

R_SD

I_SD

Shut down input resistance For current calculations

approx. 10

12

approx. 10

6

kΩ

Input current if unit

shut down

U_{i min}...U_{i max}

mA

f_s

Switching frequency

U_{i min}...U_{i max}, I_o= 0...I_{o nom}

EN 55022 ⁵

approx. 220

B ⁶

approx. 220

B ⁶

kHz

u_{i RFI}

Input RFI level, conducted

¹U_{i min}will not be as stated if U_ois increased above U_{o nom}by use of Trim input. If the output voltage is set to a higher value,

U_{i min}will be proportionately increased.

²Input undervoltage lock-out at typ. 90% of U_{i min}

.

³Measured with resistive and max. admissible capacitive load.

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

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

⁶External capacitor required.

Edition 5/08.2001 R1

6/18

Board Mountable

DC-DC Converters

IMX 35 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 4: Built-in transient voltage suppressor

I [A]

Type

Breakdown

voltage

V_{Br nom}[V]

Peak power

at 1 ms

Peak pulse

current

I_pp[A]

4

3

2

P_p[W]

20 IMX 35

40 IMX 35

50

1500

22

100

9.7

1

t [µs]

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.

0

20

50 60 70 80 90 100

10

30 40

Fig. 4

Typical inrush current at U_{i nom}, P_{o nom}versus time

(40 IMX 35). Source impedance according to

prETS 300132-2, version 4.3 at U_{i nom}

.

Note: The suppressor diode D is only necessary for

20 IMX 35 types.

U_o

t_rise

04008

U_{o nom}

Table 5: Components for external circuitry for IEC/EN

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

Type

Inductor (L)

22 µH/5A

Capacitor (C)

470 µF/40 V

Diode (D)

1.5 k E47A

-

t

t_{start up}

20 IMX 35

40 IMX 35

68 µH/2.7 A

2 x 100 µF/100 V

Fig. 5

Converter start-up and rise time

04036

L

Reverse Polarity Protection

Vi+

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.

+

C

D

Vi–

Table 3: Recommended external fuses

Fig. 6

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 35 types.

Converter type

20 IMX 35

Fuse type

F8.0A

40 IMX 35

F4.0A

22

04052

11.5

Fig. 7

23.8

Dimensions of inductor L for 20 IMX 35 and 40 IMX 35

types (e.g. Coil Craft, PCH-45 series).

Edition 5/08.2001 R1

7/18

Board Mountable

DC-DC Converters

IMX 35 Series

Electrical Output Data

General conditions:

– T_A= 25°C, unless T_Cis specified

– Shutdown pin left open-circuit (not connected)

– Trim not connected

Table 6a: Output data for single (main) output.

Output

3.3 V

5.1 V

Characteristics

Conditions

min typ

3.28

max

3.32

min typ max

Unit

V DC

A

U_o

Output voltage

U_{i nom}, I_o= 0.5 I_{o nom}

20 IMX U_{i min}...U_{i max}

40 IMX

5.07

5.13

I_{o nom}Output current

3.5

2.9

3.4

4.2

4.25

I_o1L

I_o2L

Current limit ¹

20 IMX U_{i nom}, T_C= 25°C

5.5

U_o1= 93% U_{o nom}

I_o1L

I_o2L

40 IMX

6.1

4.6

DU_{o U}Line/load regulation

U_{i min}...U_{i max}

I_o= (0.05...1) • I_{o nom}

,

±1

%

2

u_o1/2

Output voltage noise

U_{i min}...U_{i max}

I_o= I_{o nom}

70

40

80

40

mV_pp

3

U_{o L}

Output overvoltage limit. ⁴

115

130

4000

±250

1

115

130

2700

±250

1

%

µF

C_{o ext}Admissible capacitive load

u_{o d}

t_d

Dynamic

load

Voltage deviat. U_{i nom}

_{o nom}↔ ¹/

I_{o nom}

mV

ms

I

2

Recovery time

regulation

IEC/EN 61204

a_Uo

Temperature coefficient

DU_o/DT_C

U_{i min}...U_{i max}

I_o= 0.1...1 I_{o nom}

±0.02

%/K

Table 6b: Output data for double output power trains.

Output

2 × 5 V

2 × 12 V

min typ max

2 × 15 V

min typ max

Characteristics

Conditions

min typ max

Unit

U_o1

U_o2

Output voltage

U_{i nom}

I_o= 0.5 I_{o nom}

4.95

4.94

5.05

5.06

11.88

11.86

12.12

12.14

14.85

14.82

15.15 V DC

15.18

I_{o nom}Output current

20 IMX U_{i min}...U_{i max}

40 IMX

2 × 1.35

2 × 1.4

3.5

2 × 0.65

2 × 0.55

2 × 0.60

A

2 × 0.70

1.8

I_oL

Current limit ¹

20 IMX U_{i nom}, T_C= 25°C

1.5

1.6

U_o= 93% U_{o nom}

40 IMX

3.7

2.0

DU_{o U}Line regulation

DU_{o l}Load regulation

U_{i min}...U_{i max}, I_{o nom}

±1

±3

±1

±3

±1

±3

%

U_{i nom}

I_o= (0.1...1) I_{o nom}

2

u_o1/2

Output voltage noise

U_{i min}...U_{i max}

I_o= I_{o nom}

80

40

120

60

150

70

mV_pp

3

U_{o L}

Output overvoltage limit. ⁴

Min. load 1%

115

130

4000

±250

1

115

130

470

±400

1

115

130

330

±450

1

%

µF

C_{o ext}Admissible capacitive load

u_{o d}

t_d

Dynamic

load

Voltage deviat. U_{i nom}

_{o nom}↔ ¹/

I_{o nom}

mV

ms

I

2

Recovery time

regulation

a_Uo

Temperature coefficient

DU_o/DT_C

U_{i min}...U_{i max}

I_o= 0.1...1 I_{o nom}

±0.02

%/K

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.

Edition 5/08.2001 R1

8/18

Board Mountable

DC-DC Converters

IMX 35 Series

Thermal Considerations

Connection in Series

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

stationary air (convection cooling) at the indicated maxi-

mum ambient temperature T_{A max}(see table: Temperature

specifications) and is operated at its nominal input voltage

and output power, the case temperature T_Cmeasured at

the Measuring point of case temperature T_C(see: Mechani-

cal Data) will approach the indicated value T_{C max}after the

warm-up phase. However, the relationship between T_Aand

T_Cdepends 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. T_{A max}is therefore only an

indicative value and under practical operating conditions,

the ambient temperature T_Amay be higher or lower than

this value.

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.

Parallel operation of double outputs of several 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.

required in true redundant systems.

The first outputs (5.1V or 3.3 V) of triple output units should

not be paralleled, except in true redundant systems using

decoupling diodes

Output Overvoltage Protection

Caution: The case temperature T_Cmeasured at the:

Measuring point of case temperature T_C(see: Mechani-

cal Data) may under no circumstances exceed the

specified maximum value. The installer must ensure that

under all operating conditions T_Cremains within the lim-

its stated in the table: Temperature specifications.

The outputs of the converter are protected against overvolt-

ages by a second control loop. In the event of an overvolt-

age on one of the outputs the unit will shut down and

attempt to restart in short intervals. 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 overvoltage protection is not designed to with-

stand externally applied overvoltages.

Temperature Range

Full output power from –40...71°C. Above 71°C the output

power derating below should be observed. The modules

will provide the specified output power with free air convec-

tion cooling.

Typical Performance Curves

General conditions:

– T_A= 25°C, unless T_Cis specified.

– Shut down pin left open circuit.

– Trim input not connected.

P_o/P_{o max}

11047

1.2

1.0

0.8

0.6

U_o[V]

05019

5.5

5.0

4.5

4.0

3.5

3.0

0.4

0.2

0

–40

T_A[°C]

–20

0

80

20

40

60

Fig. 8

Maximum allowed output power versus ambient tempera-

ture.

0

2

3

4

5

I_o[A]

1

Fig. 9 a

Short Circuit Behaviour

U_oversus I_o(typ) of units with U_o= 5.1 V.

(40 IMX 35-05D12-8).

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 at-

tempts to automatically restart. This feature prevents from

excessive internal temperature which could occur under

heavy overload conditions.

Edition 5/08.2001 R1

9/18

Board Mountable

DC-DC Converters

IMX 35 Series

U_o[V]

U_o1, U_o2[V]

05020

05039

13

14

13

12

11

10

12

11

10

9

U_o4

U_o1

8

I_o1

I_{o1 nom}

[%]

50

75

100

125

150

0

25

7

I_{o total}[A]

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8

0

Fig. 11

Fig. 9 b

Flexible load distribution on power train 1 of 40 IMX 35

D12D12-8 (4 ¥ 12 V) with load variation from 0...150% of

P_{o nom}on output V_o1with V_o4loaded with 50% of P_{o4 nom}

U

_o1/2versus I_o1/2of double output power trains

(i.e. 2 × 12 V). See: Block diagram 1

.

U_o4[V]

13.5

h [%]

05164

05153

90

U_{i min}

13.0

I_o4= 0.035 A

12.5

80

U_{i nom}

12.0

I_o4= 0.35 A

70

11.5

11.0

0.06

0.20

0.30

0.50 0.60 0.70 I_o1[A]

0.10

0.40

P_o

100 P_{o total}

60

[%]

25

50

75

Fig. 10

Cross load regulation U_o4versus I_o1(typ) for various I_o4for

Vo1, Vo4 on power train 1. See: Block diagram double

output types. (20 IMX 35 D12D12-8)

Fig. 13

Efficiency versus input voltage and load. Typical values

20 IMX 35 D12D12-8

05041

U_o[%]

h [%]

overload short circuit condition

05152

90

100

U_{i min}

U_{i nom}

switch-off

70

80

70

60

8

t [ms]

60

Fig. 14

Overload switch off (hiccup mode), approximate values.

P_o

100 P_{o total}

[%]

25

50

75

Fig. 12

Efficiency versus input voltage and load. Typical values

40 IMX 35 D12D12-8

Edition 5/08.2001 R1

10/18

Board Mountable

DC-DC Converters

IMX 35 Series

Auxiliary Functions

Adjustable Output Voltage

06137

As a standard feature, the IMX 35 offer adjustable output

voltages in the range 80...105% of U_{o nom}by use of a con-

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

ondary side of the converter depending on type.

Vi+

Vo1+

17

4

5

>7 kΩ

Vo1–

Trim

15

Trim 1/4

+

Vo2+

The double output units IMX 35-05-05, IMX 35-12-12 and

IMX 35-15-15 have a Trim input connected to pin 5. This in-

put influences both outputs simultaneously. Both power

trains have passive transformer feedback and the Trim in-

put (pin 5) is referenced to the primary side. Fig. 16 shows

the circuit topology. Adjustment of the output voltage is pos-

sible by means of either an external resistor R_extin the

range of 100...105% of U_{o nom}(table 10) or in the range of

80...105% of U_{o nom}by means of an external voltage source

(table 11).

Control

circuit

U_ref= 2.5 V

13

U_ext

R_ext

–

Vo2–

Vi–

2

11

Fig. 16

Output voltage control for double and quad output units by

means of the Trim input on the primary side.

a) Adjustment by means of an external resistor R_ext

:

The IMX 35 triple output units feature a first power train with

magnetic feedback. The simplified circuit is shown in

Fig. 15. The Trim1 (pin 18) is secondary referenced and in-

fluences only the first power train. Adjustment of the output

voltage is possible by means of an external resistor R_ext

between the Trim1 and either Vo1+ or Vo1–. If the Trim1

Adjustment of the output voltage by means of an external

resistor R_extis possible within the range of 100...105% of

U_{o nom}. R_extshould be connected between the Trim pin 5

and Vi–. Connection of R_extto Vi+ may damage the con-

verter. Table 10 indicates suitable resistor values for typi-

cal output voltages under nominal conditions (U_{i nom}, I_o=

0.5 I_{o nom}).

input is left open-circuit, the output voltage is set to U_{o1 nom}

.

Table 9 states typical values required to program the output

Table 10: R_ext1for U_o> U_{o nom}

;

approximate values (U_{i nom}, I_o= 0.5 I_{o nom}

)

06136

U_o

[% U_{o nom}

R_ext

Vi+

Vo1+

Trim1

Vo1–

4

1

2

17

18

]

Trim [kΩ]

Trim1/ 4 [kΩ]

R_ext1

105...108 (107 typically)

0

PUL

105

104

103

102

101

100

2.0

4.2

8.2

16

47

∞

4.3

9.0

18

33

91

∞

R_PUL

R_ext2

Vi–

15

Fig. 15

Input undervoltage lockout adjustment (PUL) and output

voltage adjustment by use of the Trim1 input referenced

to the secondary side (triple output units).

b) Adjustment by means of an external voltage source U_ext

(Fig. 16):

For external output voltage adjustment in the range

80...105% of U_{o nom}a (0...15 V) source U_extis required,

connected to the Trim pin 5 and Vi–. Table 11 below indi-

cates typical U_oversus U_extvalues. Applying a control

voltage greater 15 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. (Input resis-

tor of the Trim input is >7 kΩ)

Table 9: U_o1versus R_extfor U_o1= 80...105% U_{o nom}; typical

values (U_{i nom}, I_o1/2= 0.5 I_{o1/2 nom}); triple output units

U_{o nom}

[V]

R_ext1

R_ext2

U_o1[V]

[kΩ]

U_o1[V]

[kΩ]

3.3

2.8

2.97

3.135

0.75

1.8

4.7

3.3

3.4

3.46

∞

5.6

3.3

5.1

5.0

4.84

4.59

33

9.1

2.2

5.1

5.36

5.25

∞

3

8.5

Table 11: U_oversus U_extfor U_o= 80...105% U_{o nom}

;

typical values (U_{i nom}, I_o= 0.5 I_{o nom}

)

U_o

U_ext

[% U_{o nom}

]

Trim [V]

Trim1/ 4 [V]

voltage U_o1to approximately the values as indicated.

≥105

102

100

95

85

80

0

1.6

2.5

4.25

8.45

10.5

0

1.5

2.5

4.25

8.25

10.2

The quad output units are shown in block diagram 3. All

types with equal output voltage have the Trim function con-

nected to pin 5 referenced to the primary side which influ-

ences all outputs simultaneously. The schematics are

shown in fig. 16, the values of the adjust resistor R_extin Ta-

ble 10 and the external voltage source in Table 11.

The quad output unit with unequal output voltages have the

Trim1 input (pin 5) referenced to the primary side influenc-

ing only the output of the first power train (U_o1, U_o4).

Edition 5/08.2001 R1

11/18

Board Mountable

DC-DC Converters

IMX 35 Series

Synchronisation (W)

Shut Down Function

This logic input can be used to synchronise the oscillator to

an external frequency source. The input is edge triggered

with TTL thresholds, and requires a source frequency of

490...520 kHz (duty cycle 10...90%). The external source

frequency is internally divided by 2 to define the switching

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

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

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

Programmable Input Undervoltage Lockout PUL

Reference (Ref)

A special feature of these units is the accurate undervoltage

lockout function which protects the units (and the system)

from large currents caused by operation at low voltages.

This ensures easier start-up in distributed power systems.

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.

Then we recommend to connect a filter capacitor (0.1 µF)

between Ref and Vi–.

Table 7: Turn on and turn off voltage

Type

Trigger level

7...8

Hysteresis

≤0.5

Units

V

20 IMX 35

40 IMX 35

14...15.5

≤1

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 pull up the preset level as indi-

cated in table 8. (see: Fig. 15).

Table 8: Typical values for R_extand the respective lockout

voltage for input voltage.

20 IMX 35

40 IMX 35

R_PUL[kΩ]

U_{i min}[V]

≤8

U_{i min}[V]

≤15.5

22

∞

43

16

10

0

39

19

13

9.1

10

12

26

14

28

16

32

Edition 5/08.2001 R1

12/18

Board Mountable

DC-DC Converters

IMX 35 Series

Electromagnetic Compatibility (EMC)

which typically occur in many installations, but especially in

battery driven mobile applications.

A suppressor diode together with an input filter form an ef-

fective protection against high input transient voltages

Electromagnetic Immunity

Table 12: 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

contact discharge 4000 V_p

(R pin open)

1/50 ns

330 Ω

10 positive and

10 negative

discharges

yes

B

air discharge

(R pin open)

8000 V_p

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 V_pbursts of 5/50 ns 50 Ω

5 kHz rep. rate

1 min positive

1 min negative

transients per

coupling mode

yes

B

transients with

15 ms burst

duration and a

300 ms period

Surge

IEC/EN

61000-4-5 ⁵

3

+i/–i

2000 V_p

1.2/50 µs

2 Ω

5 pos. and 5 neg.

impulses per

coupling mode

EN 50155

D

G

3

1800 V

8400 V

10 V_rms

5/50 µs

0.05/01 µs

100 Ω

50 Ω

triangular

yes

B

A

Conducted

IEC/EN

AM modulated

0.15...80 MHz

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. possibe.

⁴For 40 IMX 35 types (additional external components required). Not applicable for 20 IMX 35 types.

⁵External components required.

Electromagnetic Emission

[dBµV]

90

07020

80

EN 55022 A

EN 55022 B

70

60

50

40

30

20

10

0

MHz

Fig. 17

Typical disturbance voltage (quasi-peak) at the input ac-

cording to CISPR 11/EN 55011 and CISPR 22/EN 55022,

measured at U_{i nom}and I_{o nom}. Output leads 0.1 m, twisted.

(40 IMX 35-D12D12-9)

Edition 5/08.2001 R1

13/18

Board Mountable

DC-DC Converters

IMX 35 Series

CISPR 22/EN 55022, Level B Radiated

Electromagnetic emission requirements according to

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

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

radiated.

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

additional capacitor, see: Input Data. The filter components

Type

Current compensated choke

20 IMX 35

40 IMX 35

Murata PLH 10A 7003R6P02

Murata PLH 10A 1112R6P02

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

converter.

07114

18

13

16

L

07120

V+

Vi+

Module

V–

Vi–

Ø 0.9

Fig. 18

Example for external circuitry to comply with CISPR22/EN

55022, level B, radiated

Fig. 19

Choke dimensions

Immunity to Environmental Conditions

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

Temperature

-8 ³

Characteristics

Conditions

Operational ²

min

–40

–55

max

85

Unit

T_A

T_C

T_S

Ambient temperature ¹

°C

Case temperature

Storage temperature ¹

105

Non operational

¹MIL-STD-810D section 501.2 and 502.2

²See: Thermal Considerations

³Start up at –55°C

Table 15: MTBF and device hours

MTBF

Ground Benign

Ground Fixed

Ground Mobile

MTBF acc. to MIL-HDBK-217F

40 IMX 35-05D12-8

T_C= 40°C

T_C= 70°C

T_C= 50°C

336'000 h

141'000 h

86'000 h

110'000 h

Table 16: Environmental testing

Test Method

Standard

Test Conditions

Status

Ca

Ea

Eb

Fc

Damp heat

steady state

IEC/DIN IEC 60068-2-3

MIL-STD-810D section 507.2 Relative humidity:

Duration:

Temperature:

40 ^±2°C

%

56 days

Unit not

operating

93 ^+2/-3

Shock

(half-sinusoidal)

IEC/EN/DIN EN 60068-2-27

MIL-STD-810D section 516.3 Bump duration:

Number of bumps:

Acceleration amplitude:

100 g_n= 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 g_n= 392 m/s²

6 ms

6000 (1000 each direction)

Unit

operating

Vibration

(sinusoidal)

IEC/EN/DIN EN 60068-2-6

Acceleration amplitude:

0.35 mm (10...60 Hz)

5 g_n= 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)

Fh

Kb

Vibration

broad-band

random

IEC/EN 60068-2-64

MIL-STD-810D section 514.3 Frequency band:

Acceleration magnitude:

Acceleration spectral density: 0.05 g_n²/Hz

Unit

operating

20...500 Hz

4.9 g_{n rms}

(digital control)

Test duration:

3 h (1 h each axis)

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 5/08.2001 R1

14/18

Board Mountable

DC-DC Converters

IMX 35 Series

Mechanical Data

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

European

Projection

09121

09123

0.8 x 0.8

thread M3

0.8 x 0.8

T_c1

T_c

T_c2

63.5

72.8

63.5

69.6

76.2

option Z

Fig. 20

Case IMX 35 (Standard)

Weight: approx. 70 g

09129

option Y

Fig. 21

IMX 35 open frame (option Z) and 20 IMX 35 triple output,

open frame with base plate (option Y)

Edition 5/08.2001 R1

15/18

Board Mountable

DC-DC Converters

IMX 35 Series

Safety and Installation Instructions

Table 18: Pin allocation

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.

Pin No.

Double

output

Triple

output

Quad

output

1

2

PUL

Vi–

PUL

Vi–

PUL

Vi–

Connection to the system shall be made via a printed circuit

board with hole diameters of 1.5 mm for the pins.

3

n.c.

4

Vi+

The units should be connected to a secondary circuit.

5

Trim

W

n.c.

Trim or Trim1/4

W

Check for hazardous voltages before altering any connec-

tions.

6

W

Do not open the module.

7

Ref

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.

8

SD or i

Vo2–

n.c.

SD or i

Vo3–

Vo3+

Vo2+

Vo2–

Vo1–

n.c.

SD or i

Vo3–

Vo3+

Vo2+

Vo2–

Vo1–

Vo1+

Vo4+

Vo4–

n.c.

11

12

13

14

15

16

17

18

19

Input Fuse

Vo2+

n.c.

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, F4.8 A for 40 IMX 35 types.

Vo1–

n.c.

Vo1+

n.c.

Vo1+

Trim1

n.c.

Standards and approvals

All DC-DC converters are pending to be UL recognized ac-

cording to UL 69950, UL recognized for Canada to CAN/

CSA C22.2 No. 950-95 and IEC/EN 60950 standards.

n.c.

09122

The units have been evaluated for:

• Building in

11

12

13

14

15

16

17

18

19

1

2

3

4

5

6

7

8

• Supplementary 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.

Bottom

view

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.

Fig. 22

Pin allocation

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.

Protection Degree

The protection degree of the DC-DC converters is IP 30 (not

for option Z).

Table 17: Electric strength test voltages

Cleaning Agents

Characteristic

Input to output

IMX 35

Output to

output

Unit

In order to avoid possible damage, any penetration of

cleaning fluids should be prevented, since the power sup-

plies are not hermetically sealed.

Electric strength

test voltage 1 s

1.2

1.5

-

0.2

-

kV_rms

kV DC

MΩ

Notwithstanding this, units with opt. Z leaving the factory

unlqacquered may be cleaned and lacquered by the cus-

tomer.

Insulation resistance

at 500 V DC

>100

Partial discharge

extinction voltage

Consult factory

-

kV

Edition 5/08.2001 R1

16/18

Board Mountable

DC-DC Converters

IMX 35 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 19: 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

≤250 V AC

Basic

≤60 V

Earthed SELV circuit ²IMX 35 Operational insulation

(provided by the DC-DC

SELV circuit

converter)

≤75 V

≤60 V

≤75 V

Hazardous voltage

secondary circuit

IMX 35 Input fuse ³output sup-

pressor diodes ⁴, and

Earthed SELV

circuit

2

earthed output circuit

Double or reinforced

SELV circuit

IMX 35 Operational insulation

(provided by the DC-DC

converter)

Double or reinforced

insulated unearthed

hazardous voltage

secondary circuit ⁵

IMX 35 Supplementary insulation

based on the maximum

rated output voltage from

the front end (provided by

the DC-DC converter)

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.