48IMS7_技术文档

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Features

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

products are available.

• Input voltage ranges up to 150 VDC

• 1 or 2 isolated outputs up to 48 V

• 1200 to 2000 VAC I/O electric strength test

• Extremely wide input voltage ranges

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

• High efficiency (typ. 84%)

10.5

0.42"

25.4

1.0"

50.8

2.0"

• Input undervoltage lockout

• Inhibit input, adjustable output voltages

• Flex power: flexible load distribution on outputs

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

• High reliability and no derating

• Operating ambient temperature –40 to +85 °C

• Thermal protection

• Supplementary insulation

• Planar technology for best mechanical stability

• 2” × 1” case with 10.5 mm profile

Safety-approved to IEC 60950-1 and UL/CSA 60950-1

2^ndEdition.

1

Description

¹70/110IMX7models

The IMX7/IMS7 Series of board-mountable 7 Watt DC-DC

converters have been designed according to the latest

industry requirements and standards. The converters are

particularly suitable for use in mobile or stationary

applications in transport, railways, industry, or telecom, where

variable input voltages or high transient voltages are

prevailent.

systems, where the bus voltage may exceed the SELV limit of

60 V. The models 70IMX7 and 110IMX7 are CE-marked.

The circuitry is comprised of integral planar magnetics. All

components are automatically assembled and securely

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 considerations of possible thermal stresses ensure

the absence of hot spots, providing long life in environments,

where temperature cycles are a reality. The thermal design

allows operation at full load up to an ambient temperature of

85 °C in free air without using any potting material. For

extremely high vibration environments the case has holes for

screw mounting.

Covering a total input voltage range from 8.4 V to 150 V with six

different models, the converters are available with single and

electrically-isolated double outputs from 3.3 up to 48 V with

flexible load distribution on double outputs. A shutdown input

allows remote on/off.

Features include efficient input and output filtering with good

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.

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

application-specific engineering and design-in flexibility.

The converters provide supplementary insulation with SELV

outputs as for instances required in battery-supported

Table of Contents

Page

Description ............................................................................ 1 Electromagnetic Compatibility (EMC) ................................. 11

Model Selection ..................................................................... 2 Immunity to Environmental Conditions ...............................12

Functional Description .......................................................... 3 Mechanical Data ..................................................................13

Electrical Input Data ..............................................................4 Safety and Installation Instructions .....................................13

Electrical Output Data ............................................................7 Description of Options ........................................................14

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

BCD20007-G Rev AE, 14-May-2012

Page 1 of 14

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Model Selection

Table 1: Model Selection

Output 1

Output 2¹

Output power

P_{o nom}

Input voltage

range

Efficiency

Model

Options

V_{o1 nom}

I_{o1 nom}

V_{o2 nom}

I_{o2 nom}

[A] ¹

η _min

η _typ

[ V]

[A]

[ V]

[W]

[ V]

[%]

3.3

1.5

-

5

8.4 – 36

14 – 36

74

75.5

74.7

77

76

74.5

78

79

78

20IMX7-03-8

24IMS7-03-9

40IMX7-03-8

48IMS7-03-9

70IMX7-03-8

110IMX7-03-8

Z, G

16.8²– 75

36 – 75

40 – 121

60 – 150²

5.1

1.2

-

6.1

8.4 – 36

14 – 36

75.5

77

79

78

75.5

76

78

80

81

78

79

20IMX7-05-8

24IMS7-05-9

40IMX7-05-8

48IMS7-05-9

70IMX7-05-8

110IMX7-05-8

M, Z, G

Z, G

M, Z, G

Z, G

M, Z, G

16.8²– 75

36 – 75

40 – 121

60 – 150³

5

0.6

0.7

5

0.6

0.7

6

7

8.4 – 36

14 – 36

77

79

79.5

81.5

81

82

83

82

80

20IMX7-05-05-8

24IMS7-05-05-9

40IMX7-05-05-8

48IMS7-05-05-9

70IMX7-05-05-8

110IMX7-05-05-8

M, Z, G

Z, G

M, Z, G

Z, G

M, Z, G

16.8²– 75

36 – 75

40 – 121

60 – 150³

78

12

0.25

0.3

12

0.25

0.3

6

8.4 – 36

14 – 36

80.5

81.5

82.5

82

83

80

83

85

84

85

83

20IMX7-12-12-8

24IMS7-12-12-9

40IMX7-12-12-8

48IMS7-12-12-9

70IMX7-12-12-8

110IMX7-12-12-8

M, Z, G

Z, G

M, Z, G

Z, G

M, Z, G

7.2

16.8²– 75

36 – 75

40 – 121

60 – 150³

15

0.2

15

0.2

6

8.4 – 36

14 – 36

81

81.5

81

82

81.5

79

83

84

83

82

20IMX7-15-15-8

24IMS7-15-15-9

40IMX7-15-15-8

48IMS7-15-15-9

70IMX7-15-15-8

110IMX7-15-15-8

M, Z, G

Z, G

M, Z, G

Z, G

M, Z, G

0.24

7.2

16.8²– 75

36 – 75

40 – 121

60 – 150³

24

0.13

0.15

24

0.13

0.15

6.2

7.2

8.4 – 36

14 – 36

79

82

80

81

83

84

83

84

20IMX7-24-24-8

24IMS7-24-24-9

40IMX7-24-24-8

48IMS7-24-24-9

70IMX7-24-24-8

110IMX7-24-24-8

M, Z, G

Z, G

M, Z, G

Z, G

M, Z, G

16.8²– 75

36 – 75

40 – 121

60 – 150³

1

2

3

Flexible load distribution on double-outputs possible. If only one output is used, connect both outputs of double-output models in parallel.

Operation at low input voltage possible, if P_ois reduced to approx. 80% of P_onom at V_{i min}= 14.1 V.

Up to 154 V for 2 s

NFND: Not for new designs.

Preferred for new designs

Note: Use 20IMX7 to replace 24IMS7 and 40IMX7 to replace 48IMS7.

BCD20007-G Rev AE, 14-May-2012

Page 2 of 14

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Part Number Description

Input voltage range V_i

40 IMX7 - 05 - 05 -8 Z G

8.4 – 36 V .............................................. 20

14 – 36 V ............................................... 24

16.8 – 75 V ............................................ 40

36 – 75 V ............................................... 48

40 – 121 V ............................................. 70

60 – 150 V ........................................... 110

Series .............................................................. IMX7, IMS7

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

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

Operating ambient temperature T_A

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

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

Options:

Surface mount version^{1 ...........................................}M

Open frame^{1 .....................................................................}Z

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

Obsolete option: C-pinout .............................................. C

1

Option M and Z exclude each other.

Note: The sequence of options must follow the order above.

Example: 40IMX7-05-05-8ZG: DC-DC converter, input voltage range 16.8 – 75 V, 2 outputs providing each 5 V, 700 mA,

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

03042b

Functional Description

1

11

Vi+

Vo1+

The IMX7/IMS7 Series DC-DC converters are feedback-

controlled flyback converters using current mode PWM (Pulse

Width Modulation).

4

3

Trim

i

10

13

Vo1–

Vo2+

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% of

V_{o nom}, using either an external resistor or an external voltage

source.

PWM

2

12

14

Vo2–

n.c.

Vi–

2 × 2200 pF

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

separate transformer winding close to the secondary and fed

Fig. 2

03025a

Block diagram of dual-output models

1

3

11

Vi+

Vo+

Vo–

back to the primary control circuit. Close magnetic coupling is

provided by the planar construction, ensuring very good

regulation, and allowing for flexible load distribution. The Trim

input of double-output models is referenced to the primary

side, and allows for programming the output voltages in the

range of 100 to 105% of V_{o nom}by means of an external

resistor, or within 75 to 100% of V_{o nom}, using an external

voltage source.

PWM

i

10

12

2 × 2200 pF

1500 V

2

4

Vi–

Current limitation is provided by the primary circuit, thus

limiting the total output current (I_{o nom}for the single- and the

sum I_{o1 nom}+ I_{o2 nom}for double-output models).

13

14

R

n.c.

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

must be connected to Vi– to activate the converter.

Fig. 1

Block diagram of single-output models

BCD20007-G Rev AE, 14-May-2012

Page 3 of 14

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Electrical Input Data

General conditions:

– T_A= 25 °C, unless T_Cis specified.

– Connector pin i connected with Vi–.

– Trim or R input not connected.

Table 2a: Input data of IMX7

Input

20IMX7

40IMX7

70IMX7

110IMX7

Characteristics

Conditions

min typ max min typ max min typ max min typ max Unit

V_i

Input voltage range¹

T_{C min}– T_{C max}

I_o= 0 – I_{o nom}

8.4

36 16.8 ⁶

75

40

121 60

150

V

V_{i nom}Nominal input voltage

20

40

70

110

V_{i sur}

Repetitive surge voltage

abs. max input (3 s)

50 ⁵

100

150

t_{start up}Converter ²

switch on

Worst case condition at

0.25 0.5

s

start-up time

V_{i min}and full load

inh. release

0.1

t_rise

Rise time²

V_{i nom}

I_{o nom}

resistive load

5

ms

capacitive load

12

I_{i o}

No load input current

Input capacitance

Inhibit voltage

I_o= 0, V_{i min}– V_{i max}

(for surge calculation)

converter operating

converter inhibited

15

30

8

15

8

15

8

15

mA

µF

V

C_i

4.7

0.5

0.2

V_inh

–10

2.4

+0.8 –10

+0.8

V_{i max}2.4

V_imax

or open

–0.5

1

or open

–0.5

1

or open

–0.5

1

or open

–0.5

1

I_inh

Inhibit current

converter operating

converter inhibited

V_{i min}– V_{i max}

mA

I_{i inh}

Input current when the

converter is inhibited

3

4

I_{inr p}

f_s

Inrush peak current

V_i= V_{i nom}

3.8

3.7

4.2

5.6

A

Switching frequency

Reflected ripple current

Input RFI level conducted

V_{i min}–V_{i max}, I_o= 0 – I_{o nom}

I_o= 0 – I_{o nom}

approx. 400

50

approx. 400

30

approx. 400

20

approx. 300

kHz

I_{i rr}

10 mA_pp

V_{i RFI}

EN 55022³

A

1

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

will be proportionally increased.

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

Measured with a lead length of 0.1 m, leads twisted. Double-output models with both outputs in parallel. 70/110 IMX7 models need an

external capacitor at the input, e.g., 1 µF film or ceramic.

2

3

4

5

6

Source impedance according to ETS 300132-2, version 4.3, at V_{i nom}

.

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

Operation at lower input voltage possible: P_oapprox. 80% of P_{o nom}at V_{i min}= 14.4 V.

V_o

t_rise

04008a

V_{o nom}

t

t_{start up}

Fig. 3

Converter start-up and rise time

BCD20007-G Rev AE, 14-May-2012

Page 4 of 14

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Table 2b: Input data of IMS7; general conditions as in table 2a

Input

24IMS7

typ

48IMS7

Characteristics

Conditions

min

max

min

typ

max

Unit

V_i

Input voltage range¹

T_{C min}– T_{C max}

I_o= 0 – I_{o nom}

14

36

75

V

V_{i nom}Nominal input voltage

24

48

V_{i sur}

Repetitive surge voltage

abs. max input (3 s)

50

0.5

0.1

100

0.5

0.1

t_{start up}Converter ²

switch on

Worst case condition at

V_{i min}and full load

0.25

s

start-up time

inh. release

t_rise

Rise time²

V_{i nom}

I_{o nom}

resistive load

5

12

6

ms

capacitive load

12

0.8

I_{i o}

No load input current

Input capacitance

Inhibit voltage

I_o= 0, V_{i min}– V_{i max}

(for surge calculation)

converter operating

converter inhibited

24

12

mA

µF

V

C_i

0.5

V_inh

–10

2.4

+0.8

–10

2.4

+0.8

V_{i max}

or open

–0.5

1

or open

–0.5

1

I_inh

Inhibit current

converter operating

converter inhibited

V_{i min}– V_{i max}

mA

I_{i inh}

Input current when the

converter is inhibited

3

4

I_{inr p}

f_s

Inrush peak current

V_i= V_{i nom}

4.0

3.9

A

Switching frequency

Reflected ripple current

Input RFI level conducted

V_{i min}–V_{i max}, I_o= 0 – I_{o nom}

I_o= 0 – I_{o nom}

approx. 330

kHz

mA_pp

I_{i rr}

40

30

V_{i RFI}

EN 55022³

A

1

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

will be proportionally increased.

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

Measured with a lead length of 0.1 m, leads twisted. Double-output models with both outputs in parallel. 70/110 IMX7 models need an

external capacitor at the input, e.g. 1 µF film or ceramic.

Source impedance according to ETS 300132-2, version 4.3, at V_{i nom}

2

3

4

BCD20007-G Rev AE, 14-May-2012

Page 5 of 14

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Note: 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.

Input Transient Voltage Protection

In many applications transient voltages on the input of the

converter may occur and are possibly caused by short circuits

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

cause high energy pulses.

Input Fuse and Reverse Polarity Protection

In order to protect the converters, transient suppressors are

fitted to the input; see table below:

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:

Table 3: Built-in transient voltage suppressor

Model

Breakdown

Voltage

Peak Power

at 1 ms

P _P

Peak Pulse

Current

I_PP

– 20IMX7 and 24IMS7 a fast 2 A (F2A) fuse

– 40IMX7 and 48IMS7 a fast 1 A (F1A) fuse

– 70IMX7 a fast 0.63 A (F.63A) fuse

V_BRnom

20IMX7¹

24IMS7²

40IMX7²

48IMS7²

70IMX7²

110IMX7²

overvoltage lockout at approx. 38 V

– 110IMX7 a fast 0.63 A (F.63A) fuse.

53 V

100 V

144 V

167 V

600 W

1500 W

600 W

7.7 A

11 A

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.

4.1 A

2.9 A

2.5 A

1

The 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.

A

04030a

4

3

2

If 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.

2

1

0

To achieve IEC/EN 61000-4-5, level

2 compliance, an

0

20

40

60

80 µs

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.

Fig. 5

Typical inrush current at V_{i nom}, P_{o nom}measured according to

ETS 300132-2 (40IMX7).

07064

L

Vi+

+

i

C

D

Vi–

Fig. 4

Example for external circuitry to comply with IEC/EN

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

Table 4: Components for external circuitry to comply with

IEC/EN 61000-4-5

Model

20IMX7

24IMS7

40IMX7

48IMS7

70IMX7

110IMX7

L

C

D

330 µH, 1 A, 0.115 Ω

330 µH, 0.6 A, 0.42 Ω

1000 µ H, 0.6 A, 0.42 Ω

330 µH, 0.2 A

68 µF, 63 V 1.5KE39A

68 µF, 63 V

68 µF, 100 V

200 µF, 200 V

n.a.

BCD20007-G Rev AE, 14-May-2012

Page 6 of 14

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Electrical Output Data

General conditions:

– T_A= 25 °C, unless T_Cis specified.

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

Table 5a: Output data for single-output models

Output

V_{o nom}

3.3 V

5.1 V

Unit

Characteristics

Conditions

V_{i nom}

min typ max min typ max

V_o

Output voltage setting

3.28

1.78

3.32 5.07

5.13

V

A

I_{o nom}Output current (nom.)

V_{i min}– V_{i max}

V_{i nom}

1.5

1.2

I_{o L}

Current limit²

2.7 1.56

1

2.0

1

∆V_o

Line and load regulation

V_{i min}– V_{i max}

%

I_o= (0.05 – 1) I_{o nom}

5

v_o

Output voltage noise

other models

110IMX7

V_{i min}– V_{i max}

I_o= I_{o nom}

70

40

mV_pp

6

20

40

20

40

50

V_{o clp}Output overvoltage limit ⁷

C_{o ext}Admissiblecapacitiveload

Minimum load 1%

115

130 115

2500

130

2000

%

µF

mV

ms

V_{o d}

t_d

Dynamic Voltage deviat. V_{i nom}

250

1

250

1

load

I

_{o nom}↔ ¹/

I_onom

2

Recovery time

regulation

α_Vo

Temperature coefficient

∆V_o/∆T_C(T_{C min}to T_{C max}

V_{i min}– V_{i max}

I_o= (0.05 – 1) I_{o nom}

0.02

%/K

)

Table 5b: Output data for double-output models

Output

V_onom

2 × 5 V

2 × 12 V

2 ×15 V

2 × 24 V

Unit

Characteristics

Conditions

IMX7 V_{i nom}

I_o1= I_o2= 0.5 I_{o nom}4.95

min typ max min typ max min typ max min typ max

V_o1

V_o2

Output voltage

setting

4.96

5.04 11.90

5.05 11.88

12.10 14.88

12.12 14.85

15.12 23.81

15.15 23.75

24.19

24.25

V

V_o1

V_o2

IMS7 V_{i nom}

4.92

5.08 11.82

12.18 14.78

15.22 23.64

24.36

I_o1= I_o2= 0.5 I_{o nom}4.92

I_{o nom}Output current

20IMX7 V_{i min}– V_{i max}

other models

20IMX7 V_{i nom}

other models

2× 0.6

2 × 0.7

2 × 0.25

2 × 0.3

2 × 0.2

2 × 0.24

2 × 0.13

2 × 0.15

A

(nom.)¹

I_{o L}

Current

limit ^{2 3}

1.8

2.1

2.0

1

0.7

0.8

0.9 0.5

0.7 0.35

0.45

0.5

1

1.0 0.55

0.9 0.38

∆V_o1Line regulation

∆V_{o l}Load regulation ⁴

V_{i min}– V_{i max}, I_{o nom}

V_{i nom}, (0.1–1)I_{o nom}

1

%

3

5

v_{o1, 2}Output voltage noise

V_{i min}– V_{i ma}

I_o= I_{o nom}

80

40

120

150

240 mV_pp

50 100

130

100

6

20

25

50

30

60

V_{o clp}Output overvoltage limit⁷

C_{o ext}Admissiblecapacitive load³

Minimum load 1%

115

130 115

2000

130 115

300

130 115

200

%

µF

V_{o d}

t_d

Dynamic Voltage deviat. V_{i nom}

150

1

330

1

350

1

600

1

mV

load

I

_{o nom}↔ ¹/

I_onom

2

Recovery time

ms

regulation

α_Vo

Temperature coefficient

of output voltage

V_{i min}– V_{i max}

(0.05 –1)I_{o nom}

0.02

%/K

1

Each output is capable of delivering full output power P_{o nom}according to table Model Selection.

The current limit is primary side controlled. I_{o L}is defined when V_odropped to 85 to 94%.

Measured with both outputs connected in parallel.

2

3

4

5

6

7

Conditions for specified output. Other output loaded with constant current I_o= 0.5 I_{o nom}

BW = 20 MHz

.

Measured with a probe according to EN 61204.

The overvoltage protection is not tracking with the R control.

BCD20007-G Rev AE, 14-May-2012

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IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Output Overvoltage Protection

Thermal Considerations

The outputs are protected against overvoltage 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 overvoltage,

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.

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

stationary air (convection cooling) at the maximum ambient

temperature T_{A max}(see table Temperature specifications) and

is operated at nominal input voltage and output power, the

case temperature T_Cmeasured at the measuring point of

case temperature (see Mechanical Data) will approach T_{C max}

after the warm-up phase. However, the relationship between

T_Aand T_Cdepends heavily on the conditions of operation and

integration into a system, such as input voltage, output

current, airflow, temperature of surrounding components and

surfaces, and the properties of the printed circuit board. T_{A max}

is therefore only an indicative value, and under practical

operating conditions, T_Amay be higher or lower.

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.

Caution: The case temperature T_Cmeasured at the measuring

point of case temperature (see Mechanical Data) may under no

circumstances exceed the specified maximum. The installer must

ensure that under all operating conditions T_Cremains within the

limits stated in the table Temperature specifications.

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.

P_o/P_{o max}

JM017

V_o[V]

1.0

0.8

05087a

5.5

0.5 m/s

= 100 LFM

5.0

4.5

4.0

3.5

3.0

0.6

natural cooling

0.4

0.2

0

T_A

20

40

60

80

100

°C

Fig. 6

0

0.8

1.2

1.6

0.4

I_o[A]

Maximum allowed output power versus ambient temperature

Fig. 8a

Short-Circuit Behavior

V_oversus I_o(typ.) of single-output models with V_o= 5.1 V

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.

V_o[V]

05086b

13

12

11

10

9

V_o[%]

overload short-circuit condition

100

switch-off

05041b

70

8

7

0

0.2

0.4

0.6

0.8

I_{o total}[A]

t

0

0.3 s

Fig. 8b

Fig. 7

V_oversus I_o(typ.) of double-output models (2 ×12 V) with both

outputs in parallel

Overload switch-off (hiccup mode).

BCD20007-G Rev AE, 14-May-2012

Page 8 of 14

www.power-one.com

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

η [%]

Typical Performance Curves

05052a

90

V_o1[V]

V_{i nom}

V_{i max}

V_{i min}

05088a

80

70

13.5

13

12.5

I_o2= 0.03 A

I_o2= 0.3 A

60

50

12

11.5

11

P_o

40

25

50

100 %

P_o

75

nom

0.15 0.20

0.25

0.3

I_o1[A]

0.05 0.10

Fig. 11

Fig. 9

Efficiency versus input voltage and load.

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

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

V). The cross-load effect is negligible.

V_o1, V_o2[V]

05059a

12.8

12.4

12

V_o2

V_o1

11.6

I_o1

I_{o1 nom}

[%]

11.2

60

90

120

150

0

30

Fig. 10

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

V) with load variation from 0 to 150% of P_{o1 nom}on output 1.

Output 2 loaded with 25% of P_{o2 nom}

.

Auxiliary Functions

Adjustable Output Voltage

As a standard feature, all IMX7 and IMS7 converters offer

adjustable output voltage(s) by using a control pin. If this pin is

left open-circuit, the output voltage is set to V_{o nom}. The output

voltage is adjustable in the range of 75 to 105% of V_{o nom}.The

circuit works for single- and double-output models in a

different way. For output voltages V_o>V_{o nom}, the minimum

input voltage V_{i min}(see Electrical Input Data) increases

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 converter

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).

proportionally to V /V

.

o

o nom

Converter operating:

Converter inhibited

–10 V to 0.8 V

or inhibit pin i left open: 2.4 V to V_{i max}

(20/40IMX7,

24/48IMS7)

2.4 V to 75 V

(70/110IMX7)

BCD20007-G Rev AE, 14-May-2012

Page 9 of 14

www.power-one.com

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Single-output models with R-input:

100 to 105% V_{o nom}. R_extshould be connected between pin

4 and Vi–. The following table indicates suitable resistor

values for typical output voltages under nominal

conditions (V_{i nom}, I_o= 0.5 I_{o nom}), with paralleled outputs or

equal load conditions on each output.

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.

Caution: Connection of R_extto Vi+ may damage the converter.

06029e

Vi+

Vo+

06089a

R_ext2

Vi+

Vo1+

Vo1–

Vo2+

4 kΩ

V_ref= 2.5 V

R

Trim

+

–

Control

logic

+

–

V_ext

R_ext1

Control

circuit

V_ref2.5 V

V_ext

R_ext

Vi–

Vo–

Vi–

Vo2–

Fig. 12

Fig. 13

Output voltage adjust for single-output models

Output voltage adjust for double-output models

a) Adjustment by means of an external resistor:

Table 6: R_extfor V_o> V_{o nom}

approximate values (V_{i nom}, I_o1= I_o2= 0.5 I_{o1/2 nom}

Depending upon the value of the required output voltage,

a resistor R_ext1or R_ext2shall be connected as shown in the

figure below:

Either: R_ext1between the R pin and Vo– to achieve an

output voltage adjustment range of V_o= 75 to 100% of

V_{o nom}(85 to 100% for 3.3 V outputs):

)

V_o[% V_onom

]

R_ext[kΩ]

105 to 108 (107 typically)

0

105

104

103

102

101

100

1.5

5.6

12

27

68

∞

V_o

R

_ext1≈ 4 kΩ • –––––––––

V_{o nom}– V_o

or: R_ext2between the R pin and Vo+ to achieve an output

voltage range of approximately V_o= 100 to 105% of V_{o nom}

(V_o– 2.5 V)

:

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

converter into a hiccup mode.

R

_ext2≈ 4 kΩ • ––––––––––––––––––

2.5 V • (V_o/V_{o nom}– 1)

b) Adjustment by means of an external voltage V_extbetween

Vo– and R pin.

b) Adjustment by means of an external voltage source V_ext

.

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

V_{o nom}a voltage source V_ext(0 to 20 V) is required,

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

below indicates typical V_oversus V_extvalues under

nominal conditions (V_{i nom}, I_o= 0.5 I_{o nom}), with paralleled

outputs or equal load conditions on each output. Direct

paralleling of the Trim-inputs of converters connected in

parallel is feasible.

The control voltage is 1.96 to 2.62 V and allows for

adjustment in the range of 75 to 105% of V_{o nom}

.

V_o• 2.5 V

V_{o nom}

V

_ext≈ ––––––––

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).

Table 7: V_extfor V_o= 75 to 105% V_{o nom}

;

typical values (V_{i nom}, I_o1= I_o2= 0.5 I_{o1/2 nom}

)

Double-output models with Trim input:

V_o[% V_{o nom}

]

V_ext[V]

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

to the primary side. The figure 15 shows the circuitry.

Adjustment of the output voltage is possible in the range of

100 to 105% of V_{o nom}using an external resistor, or in the range

of 75 to 105% of V_{o nom}using an external voltage source.

≥105

102

95

85

75

0

1.6

4.5

9

13

a) Adjustment by means of an external resistor R_ext

.

Programming of the output voltage by means of an

external resistor R_ext1is possible within a limited range of

BCD20007-G Rev AE, 14-May-2012

Page 10 of 14

www.power-one.com

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

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

effective protection against high input transient voltages,

Electromagnetic Immunity

Table 8: Immunity type tests

Phenomenon

Standard

Class

level

Coupling

mode ¹

Value

applied

Waveform

Source

imped.

Test

procedure

In

Perf-

oper. crit.²

Electrostatic

discharge

to case ⁵

IEC/EN

61000-4-2

2

3

contact discharge 4000 V_p

1/50 ns

330 Ω

10 positive and

10 negative

discharges

yes

B

air discharge

antenna

8000 V_p

Electromagnetic IEC/EN

field

3⁶

2³

10 V/m

3 V/m³

AM 80%

1 kHz

n.a.

80 – 1000 MHz

yes

A

ENV 50204

3

2³

antenna

10 V/m

3 V/m³

PM, 50% duty

cycle, 200 Hz

repetition frequ.

900 MHz

Electrical fast

transients/burst 61000-4-4

IEC/EN

4

3³

direct +i/–i

4000 V_pbursts of 5/50 ns

2000 V_p5 kHz repet. rate,

50 Ω

60 s positive,

60 s negative

transients per

coupling mode

yes

B

3

transients with

15 ms burst

duration, and

300 ms period

Surges

IEC/EN

61000-4-5

3 ⁴

+i/–i

2000 V_p

1000 V_p

1.2/50 µs

2 Ω

5 pos. and 5 neg.

surges

yes

B

A

3

2^{3 4}

RF conducted

immunity

IEC/EN

61000-4-6

3

2³

10 VAC

3 VAC

AM modul. 80%

1 kHz

50 Ω

0.15 to 80 MHz

150 Ω

1

i = input, o = output

2

3

4

5

6

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

Valid for 24IMS7 and 48IMS7

External components required

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

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

Electromagnetic Emissions

Date: 5.9.07

40IMX7-24-24-8 Peak

Time: 08:00

PMM 8000 PLUS

Name: 40_7_24

Date: 5.9.07

Time: 08:18

PMM 8000 PLUS

Name: 20_7_15

dbµV

80

20IMX7-15-15-8 Peak

dbµV

80

EN 55022 A

60

40

60

40

20

0

20

0

0.2

0.5

1

2

5

10

20 MHz

0.2

0.5

1

2

5

10

20 MHz

Fig. 14a

Fig. 14b

40IMX7-24-24-8: Typical conducted emissions (peak) at the

input at V_{i nom}and I_{o nom}according to EN 55011/22. Output

leads 0.1 m, twisted. External input capacitor (1 µF ceramic +

47 µF electrolytic cap)

20IMX7-15-15-8: Typical conducted emissions (peak) at the

input at V_{i nom}and I_{o nom}according to EN 55011/22. Output

leads 0.1 m, twisted. External input capacitor (1 µF ceramic +

100 µF electrolytic cap)

BCD20007-G Rev AE, 14-May-2012

Page 11 of 14

www.power-one.com

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Date: 5.9.07

110IMX7-05-8 Peak

Time: 08:00

PMM 8000 PLUS

Name: 110_7_05

Date: 5.9.07

48IMS7-15-15-8 Peak

Time: 09:10

PMM 8000 PLUS

Name: 48_7_15

dbµV

80

dbµV

80

EN 55022 A

60

40

60

40

20

0

20

0

0.2

0.5

1

2

5

10

20 MHz

0.2

0.5

1

2

5

10

20 MHz

Fig. 14c

Fig. 15

110IMX7-05-8: Typical conducted emissions (peak) at the

input at V_{i nom}and I_{o nom}according to EN 55011/22. Output

leads 0.1 m, twisted. External input capacitor (0.15 µF

ceramic + 4.7 µF electrolytic cap).

48IMS7-15-15-8: Typical conducted emissions (peak) at the

input at V_{i nom}and I_{o nom}according to EN 55011/22. Output

leads 0.1 m, twisted. External input capacitor (1 µF ceramic +

47 µF electrolytic cap).

Immunity to Environmental Conditions

Table 9: Mechanical and climatic stress

Test Method

Standard

Test conditions

Status

Cab

Damp heat

steady state

IEC/EN 60068-2-78

MIL-STD-810D section 507.2

Temperature:

Relative humidity:

Duration:

40 ²°C

Converter

not

operating

93^+2/-3

%

56 days

Ea

Shock

(half-sinusoidal)

IEC/EN 60068-2-27¹

MIL-STD-810D section 516.3

Acceleration amplitude:

Bump duration:

100 g_n= 981 m/s²

6 ms

Converter

operating

Number of bumps:

18 (3 each direction)

Eb

Bump

(half-sinusoidal)

IEC/EN 60068-2-29

MIL-STD-810D section 516.3

Acceleration amplitude:

Bump duration:

40 g_n= 392 m/s²

6 ms

Converter

operating

Number of bumps:

6000 (1000 each direction)

Fc

Vibration

(sinusoidal)

IEC/EN 60068-2-6

IEC/EN 60068-2-64

IEC/EN 60068-2-52

Acceleration amplitude:

0.35 mm (10 to 60 Hz)

Converter

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

10 to 2000 Hz

Frequency (1 Oct/min):

Test duration:

7.5 h (2.5 h each axis)

Fh

Kb

Vibration,

broad-band

random

Acceleration spectral density: 0.05 g_n²/Hz

Frequency band:

Acceleration magnitude:

Test duration:

Converter

operating

10 to 500 Hz

4.9 g_{n rms}

3 h (1 h each axis)

(digital control)

Salt mist, cyclic

(sodium chloride

NaCl solution)

Concentration:

Duration:

Storage:

Storage duration:

Number of cycles:

5% (30 °C)

Converter

not

operating

2 h per cycle

40 °C, 93% rel. humidity

22 h per cycle

3

1

Covers also EN 50155/EN 61373 category 1, class B, body mounted (= chassis of coach)

Temperatures

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

Temperature

-9

-8

Unit

Characteristics

Conditions

Operational ¹

min

–40

max

71

min

–40

max

85

T_A

T_C

Ambient temperature

°C

Case temperature

95

105

T_S

Storage temperature

Non operational

–55

100

–55

105

1

See Thermal Considerations

BCD20007-G Rev AE, 14-May-2012

Page 12 of 14

www.power-one.com

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

Failure Rates

Table 11: MTBF and device hours

Model

Standard

Ground benign

Ground fixed

Ground mobile

Unit

T_C= 40 °C

T_C= 70 °C

T_C= 50 °C

24IMS7-05-9

MIL-HDBK-217F

Bellcore

634 000

851 000

321 000

395 000

188 000

271 000

342 000

409 000

447 000

h

40IMX7-12-12-8

253 000

809 000

871 000

3 019 000

3 320 000

1 510 000

1 660 000

40IMX7-05-05-8

Bellcore

0.8 × 1.2 (0.03 × 0.05") pins

1.6 (0.06) PCB holes

Mechanical Data

50.8 (2")

3.81(0.15")

Dimensions in mm (inches).

Tolerances 0.3 mm,

3.4 (0.13")

European

Projection

S09030b

unless otherwise noted.

14

10

1

4

Weight: <20 g

4.6 (0.18")

Fig. 16

3.81(0.15")

45.7 (1.8")

PT 2.2

self tapping screws

Case IMX7/IMS7 with

standard pinout

Measuring point

of case temperature T_C

48 (1.9")

50.8

0.8 × 1.2 Pins

09031a

S90002b

3.81

14

1

3.81

1

Bottom view

5.08

3.81

10

5.08

3.81

4

3.5 0.1 (0.14")

43.2 (1.7")

42.4

T_{C Z}

Measuring point

case temper. T_C

Core

4.2

Fig. 18

1.2 (0.5")

Fig. 17

Open-frame

model (option Z)

SMD pins (option M)

Table 12: Pin allocation

Safety and Installation Instructions

1

Single output

Double output

Pin Allocation

Vi+

Vi–

i

Vi+

Vi–

2

10011

3

i

14

1

4

n.c.

Vo–

Vo+

Vo–

R

Trim

Vo1–

Vo1+

Vo2–

Vo2+

n.c.

13

12

11

10

2

3

4

Bottom view

10

11

12

13

14

Fig. 19

n.c.

Footprint

BCD20007-G Rev AE, 14-May-2012

Page 13 of 14

www.power-one.com

IMX7, IMS7 Series Data Sheet

7-Watt DC-DC Converters

®

with a protective lacquer (except option Z).

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.

Protection Degree

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

frame models (option Z).

Connection to the system shall be made via a printed circuit

board; see Mechanical Data.

Cleaning Liquids

IIn order to avoid possible damage, any penetration of

cleaning fluids should be prevented, since the power

supplies are not hermetical sealed.

The converters should be connected to a secondary circuit.

Do not open the converter.

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

unlacquered; they may be lacquered by the customer, for

instance together with the mother board. Cleaning agents are

not permitted – except washing at room temperature with

isopropyl alcohol. If necessary, the mother board must be

cleaned, before fitting the open-frame converter.

Ensure that a converter failure does not result in a hazardous

conditions.

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.

Note: Cleaning liquids may damage the adhesive joints of the

ferrite cores.

Standards and Approvals

Isolation

The converters are approved according to UL/CSA 60950-1

The electric strength test is performed in the factory as a

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.

and IEC 60950-1 2^ndEdition.

The converters have been evaluated for:

• Building-in

• Basic insulation input to output, based on their maximum

input voltage

Table 12: Electric strength test voltages

• Pollution degree 2 environment

• Connecting the input to a secondary circuit, which is

subject to a maximum transient rating of

- 1500 V for 20IMX7, 24IMS7, 40IMX7, 48IMS7

- 2000 V for 70IMX7

Characteristic

Input to output

20/40IMX 70IMX 110IMX

24/48IMS

o/o¹

Unit

Factory test >1 s

EquivalentDCvolt.

1.2

1.5

1.2

1.5

2.0

1.2

2.0

2.5

1.2

0.1

0.15

-

kVAC

kVDC

nF

- 2500 V for 110IMX7.

Coupling

capacitance

The converters are subject to manufacturing surveillance in

accordance with the above mentioned standards.

Insulation resist.

at 500 VDC

>100

-

MΩ

Railway Applications

1

To comply with railway standards, all components are coated

Between the outputs of double-output models

Description of Options

necessary or in the case that the motherboard should be

lacquered after fitting the converter; see Cleaning Liquids.

Option M: SMD pins

Option G: RoHS-6

This option allows surface mounting of the converters.

Converters with a type designation ending by G are RoHS-

compliant for all six substances.

Option Z: Open Frame

For applications, where the protection by a housing is not

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.

BCD20007-G Rev AE, 14-May-2012

Page 14 of 14

www.power-one.com


型号：	48IMS7
厂家：	POWER-ONE
描述：	IMX7, IMS7 Series Data Sheet 7-Watt DC-DC Converters
文件：	总14页 (文件大小：636K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

48IMS7 [POWER-ONE]

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