EK1501-7ERD2B2_技术文档

Rugged Environment

DC-DC Converters >100Watt

K Series

150 Watt DC-DC Converters

K Series

Input to output isolation

Single output: AK...EK 1000

Double output: AK...EK 2000

• Extremely wide input voltage range

• Input over- and undervoltage lock-out

• Efficient input filter and built-in surge and transient

suppression circuitry

• 4 kV_rmsinput to output electric strength test

• Fully isolated outputs

• Outputs open- and short-circuit proof

• No derating over entire operating temperature range

Safety according to IEC/EN 60950

LGA

C

111

4.4"

3 U

80

168

6.6"

3.2"

16 TE

Summary

The K series of DC-DC converters represents a broad and

flexible range of power supplies for use in advanced elec-

tronic systems. Features include high efficiency, high reli-

ability, low output voltage noise and excellent dynamic re-

sponse to load/line changes.

Full input to output, input to case, output to case and output

to output isolation is provided. The modules are designed

and built according to the international safety standards

IEC/EN 60950 and have been approved by the safety

agencies LGA (Germany) and UL (USA). The UL Mark for

Canada has been officially recognized by regulatory au-

thorities in provinces across Canada.

The converter inputs are protected against surges and tran-

sients occuring at the source lines. An input over- and

undervoltage lock-out circuitry disables the outputs if the

input voltage is outside the specified range. Certain types

include an inrush current limitation preventing circuit break-

ers and fuses from being damaged at switch-on.

The case design allows operation at nominal load up to

71°C in a free air ambient temperature. If forced cooling is

provided, the ambient temperature may exceed 71°C but

the case temperature must remain below 95°C under all

conditions.

All outputs are open- and short-circuit proof and are pro-

tected against overvoltages by means of a built-in suppres-

sor diode. The outputs can be inhibited by a logic signal ap-

plied to the connector pin 18 (i). If the inhibit function is not

used pin 18 must be connected with pin 14 to enable the

outputs.

A temperature sensor generates an inhibit signal which

disables the outputs if the case temperature T_Cexceeds the

limit. The outputs are automatically re-enabled when the

temperature drops below the limit.

Various options are available to adapt the converters to in-

dividual applications.

LED indicators display the status of the converter and allow

visual monitoring of the system at any time.

The modules may either be plugged into 19" rack systems

according to DIN 41494, or be chassis mounted.

Table of Contents

Page

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

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

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

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

Electrical Input Data ......................................................... 5

Electrical Output Data ...................................................... 7

Auxiliary Functions ......................................................... 14

Electromagnetic Compatibility (EMC) ............................ 18

Immunity to Environmental Conditions........................... 20

Mechanical Data ............................................................ 21

Safety and Installation Instructions ................................ 22

Description of Options.................................................... 25

Accessories .................................................................... 31

Edition 4/4.99

1/31

MELCHER

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

Type Survey and Key Data

Non standard input configurations or special custom adaptions are available on request. See also: Commercial Informa-

tion: Inquiry Form for Customized Power Supply.

Table 1a: Type survey AK

Output 1

Output 2

Input Voltage

Options

U_{o nom}

[V DC]

I_{o nom}

[A] ²

U_{o nom}

[V DC]

I_{o nom}

[A] ²

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

8...35 V DC

h_min

[%]

5.1

20.0

10.0

8.0

-

AK 1001-7R

AK 1301-7R

AK 1501-7R

AK 1601-7R

78

80

82

-9

12.0

15.0

24.0

E ³

D

5.0

V ⁶

P

T

B1

B2

24.0 ⁴

30.0 ⁴

48.0 ⁴

5.0

4.0

2.5

-

AK 2320-7R

AK 2540-7R

AK 2660-7R

78

79

12.0

15.0

24.0

5.0

4.0

2.5

12.0 ⁵

15.0 ⁵

24.0 ⁵

5.0

4.0

2.5

AK 2320-7R

AK 2540-7R

AK 2660-7R

78

79

Table 1b: Type survey BK, FK, CK

Output 1

Output 2

Input Voltage Range and Efficiency ¹

Options

U_{o nom}

[V DC]

I_{o nom}

[A] ²

U_{o nom}

[V DC]

I_{o nom}

[A] ²

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

14...70 V DC

h_min

[%]

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

20...100 V DC

h_min

[%]

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

28...140 V DC

h_min

[%]

5.1

25.0

12.0

10.0

6.0

-

BK 1001-7R

BK 1301-7R

BK 1501-7R

BK 1601-7R

79

81

82

84

FK 1001-7R

FK 1301-7R

FK 1501-7R

FK 1601-7R

80

82

85

86

CK 1001-7R

CK 1301-7R

CK 1501-7R

CK 1601-7R

79

82

84

86

-9

12.0

15.0

24.0

E ³

D

V ⁶

P

T

B1

B2

24.0 ⁴

30.0 ⁴

48.0 ⁴

6.0

5.0

3.0

-

BK 2320-7R

BK 2540-7R

BK 2660-7R

80

FK 2320-7R

FK 2540-7R

FK 2660-7R

81

83

84

CK 2320-7R

CK 2540-7R

CK 2660-7R

80

82

84

12.0

15.0

24.0

6.0

5.0

3.0

12.0 ⁵

15.0 ⁵

24.0 ⁵

6.0

5.0

3.0

BK 2320-7R

BK 2540-7R

BK 2660-7R

80

FK 2320-7R

FK 2540-7R

FK 2660-7R

81

83

84

CK 2320-7R

CK 2540-7R

CK 2660-7R

80

82

84

Table 1c: Type survey DK, EK

Output 1

Output 2

Input Voltage Range and Efficiency ¹

Options

U_{o nom}

[V DC]

I_{o nom}

[A] ²

U_{o nom}

[V DC]

I_{o nom}

[A] ²

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

44...220 V DC

h_min

[%]

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

67...385 V DC

h_min

[%]

5.1

25.0

12.0

10.0

6.0

-

DK 1001-7R

DK 1301-7R

DK 1501-7R

DK 1601-7R

79

83

86

87

-

-9

12.0

15.0

24.0

EK 1301-7R

EK 1501-7R

EK 1601-7R

84

E ³

D

V ⁶

P

T

B1

B2

24.0 ⁴

30.0 ⁴

48.0 ⁴

6.0

5.0

3.0

-

DK 2320-7R

DK 2540-7R

DK 2660-7R

81

82

85

EK 2320-7R

EK 2540-7R

EK 2660-7R

81

80

83

12.0

15.0

24.0

6.0

5.0

3.0

12.0 ⁵

15.0 ⁵

24.0 ⁵

6.0

5.0

3.0

DK 2320-7R

DK 2540-7R

DK 2660-7R

81

82

85

EK 2320-7R

EK 2540-7R

EK 2660-7R

81

80

83

¹Efficiency at U_{i nom}and I_{o nom}

.

²If the output voltages are increased above U_{o nom}via R-input control, option P setting, remote sensing or option T, the output currents

should be reduced accordingly so that P_{o nom}is not exceeded.

³Option E only for CK, DK, EK types.

⁴Series connection of output 1 and 2.

⁵Second output semi-regulated.

⁶Option V for K 1001 types only.

Edition 4/4.99

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Rugged Environment

DC-DC Converters >100Watt

K Series

Type Key

C K 2 5 40 -7 E R P D V T B1

Input voltage range U_i:

8...35 V DC ............... A

14...70 V DC .............. B

20...100 V DC .............. F

28...140 V DC .............. C

44...220 V DC .............. D

67...385 V DC .............. E

Series ...............................................................................K

Number of outputs....................................................... 1...2

Single output units:

Nominal voltage output 1 (main output), U_{o1 nom}

5.1 V ....... 0, 1, 2

12 V ............... 3

15 V ........... 4, 5

24 V ............... 6

other voltages ........... 7, 8

Other specifications for

single output modules ...... 01...99

Symmetrical double output units:

Nominal voltage output 1/output 2, U_{o1/2 nom}

12 V/12 V ¹(24 V series connection) ............. 20

15 V/15 V ¹(30 V series connection) ............. 40

24 V/24 V ¹(48 V series connection) ............. 60

other symmetrical voltages ...... 70...99

Operational ambient temperature range T_A:

–25…71°C .............. -7

–40…71°C .............. -9

customer specific ........ -0...-6

Auxiliary functions and options:

Inrush current limitation .................................................... E ³

Output voltage control input ............................................ R ²

Potentiometer (output voltage adjustment) ......................P ²

Save data signal (D0...DD, to be specified) .................... D ⁴

ACFAIL signal (V0, V2, V3, to be specified) .................... V ^{4, 5}

Current sharing ................................................................ T

Cooling plate standard case ..........................................B1

Cooling plate for long case 220 mm .............................. B2

¹External wiring of main and second output depending upon the desired output configuration (see: R-Function for Different Output

Configurations).

²Feature R excludes option P and vice versa.

³Option E available for CK, DK and EK types.

⁴Option D excludes option V and vice versa.

⁵Option V available for K 1001 type.

Example:

CK 2540-7PD3: DC-DC converter, input voltage range 28...140 V, double output, each providing15 V/5 A,

equipped with potentiometer and undervoltage monitoring option. Ambient temperature –25...71°C.

Edition 4/4.99

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K Series

DC-DC Converters >100Watt

Rugged Environment

Functional Description

generates, with respect to the maximum admissible output

currents, the control signal for the primary switching tran-

sistor.

The input voltage is fed via an input fuse, an input filter, and

an inrush current limiter to the input capacitor. This capaci-

tor sources a single transistor forward converter. Each out-

put is powered by a separate secondary winding of the

main transformer. The resultant voltages are rectified and

their ripples smoothed by a power choke and output filter.

The control logic senses the main output voltage U_o1and

The second output of double output units is controlled by

the main output but has independent current limiting. If the

main output is driven into current limitation, the second out-

put voltage will fall as well and vice versa.

P

03057

16

18

R

i

26

Vi+

Y

28

20 D/V

2

T

22

12

4

1

S+

Y

Vo+

6

8

4

Vo–

10

3

30

Vi–

32

S–

14

Y

24

–

+

Fig. 1

Block diagram of single output converters AK…EK 1000

P

03058

16

R

26

18 i

20 D

Y

Vi+

28

2

T

22

1

Y

12

Vo1+

14

4

Vo1–

4

Y

Vo2+

3

6

30

32

Vi–

8

Vo2–

Y

10

24

–

+

Fig. 2

Block diagram of symmetrical double output converters AK...EK 2000

¹Transient suppressor (VDR) in CK, DK, EK, FK types

²Transient suppressor (diode) in AK, BK, CK, FK types

³Inrush current limiter in CK, DK, EK types (NTC or Opt. E), -9 versions exclude the NTC

⁴Input fuse

Edition 4/4.99

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Rugged Environment

DC-DC Converters >100Watt

K Series

Electrical Input Data

General Conditions

– T_A= 25°C, unless T_Cis specified.

– Pin 18 connected to pin 14, U_oadjusted to U_{o nom}(option P); R input not connected.

– Sense line pins S+ and S– connected to Vo+ and Vo– respectively.

Table 2a: Input data

Input

AK

BK

FK

Characteristics

Conditions

min

8

typ

max

35

min

14

typ

max

70

min

20

typ

max

Unit

U_i

Operating input voltage

I_o= 0…I_{o nom}

T_{C min}…T_{C max}

100

V DC

U_{i nom}Nominal input voltage

15

30

48

1

I_i

Input current

U_{i nom}, I_{o nom}

9.0

6.0

3.75

A

P_i0

No-load input power

Idle input power

Input resistance

NTC resistance ²

Input capacitance

Conducted input RFI

Radiated input RFI

U_{i min}…U_{i max}

unit inhibited

T_C= 25°C

2.5

1.5

2.5

1.5

2.5

1.5

W

P_{i inh}

R_i

65

100

300

70

mΩ

µF

3

R_NTC

C_i

830

1250

40

450

80

1200

1800

100

U_{i RFI}

EN 55022

U_{i nom}, I_{o nom}

A

B

A

B

U_{i abs}

Input voltage limits

without damage

0

V DC

Table 2b: Input data

Input

CK

DK

EK

Characteristics

Conditions

min

28

typ

max

140

min

44

typ

max

220

min

67

typ

max

385

U_i

Operating input voltage

I_o= 0…I_{o nom}

T_{C min}…T_{C max}

V DC

U_{i nom}Nominal input voltage

60

110

1.6

220

0.8

1

I_i

Input current

U_{i nom}, I_{o nom}

3.0

A

P_i0

No-load input power

Idle input power

Input resistance

NTC resistance ²

Input capacitance

Conducted input RFI

Radiated input RFI

U_{i min}…U_{i max}

unit inhibited

T_C= 25°C

2.5

1.5

2.5

1.5

2.5

1.5

W

P_{i inh}

R_i

150

800

660

170

1600

260

180

3200

210

mΩ

µF

R_NTC

C_i

1000

154

400

U_{i RFI}

EN 55022

U_{i nom}, I_{o nom}

B

U_{i abs}

Input voltage limits

without damage

0

400 ⁴

0

V DC

¹With double output modules, both outputs loaded with I_{o nom}

.

²Valid for -7 versions with NTC, (-9 versions exclude the NTC). Initial switch-on cycle. Subsequent switch-on/off cycles increase the in-

rush current peak value.

³AK, BK and FK types have no NTC (inrush current limiter) fitted.

⁴1 s max., duty cycle 1% max.

Input Transient Protection

tremely wide input range is required. The EK input range for

110 V batteries has been designed and tested to meet this

requirement.

A suppressor diode or a VDR (depending upon the input

voltage range) together with the input fuse and a symmetri-

cal input filter form an effective protection against high input

transient voltages which typically occur in most installa-

tions, but especially in battery driven mobile applications.

Inrush Current Limitation

The CK, DK, EK modules incorporate an NTC resistor in

the input circuitry which - at initial turn on - reduces the peak

inrush current value by a factor of 5...10 to protect connec-

tors and switching devices from damage. Subsequent

switch-on cycles within short periods will cause an increase

of the peak inrush current value due to the warming-up of

the NTC resistor. See also: E option.

Nominal battery voltages in use are: 12, 24, 36, 48, 60, 72,

110 and 220 V. In most cases each nominal value is speci-

fied in a tolerance of –30%...+25%.

In certain applications, surges according to RIA 12 are

specified in addition to those defined in IEC 571-1. The

power supply must not switch off during these surges and

since their energy can practically not be absorbed an ex-

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K Series

DC-DC Converters >100Watt

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Input Inrush Current Characteristic

I_{i inr}[A]

150

Input Fuse

A fuse mounted inside the converter protects the module

against severe defects. This fuse may not fully protect the

module when the input voltage exceeds 200 V DC! In appli-

cations where the converters operate at source voltages

above 200 V DC an external fuse or a circuit breaker at sys-

tem level should be installed!

05108

Table 3: Fuse Specification

100

Module

Fuse type

Fuse rating

AK ¹

BK ¹

CK ²

DK ²

EK ²

FK ²

fast-blow

slow-blow

Little fuse 314 30.0 A, 125 V

Little fuse 314 25.0 A, 125 V

CK

EK

DK

SPT

12.5 A, 250 V

8 A, 250 V

4 A, 250 V

16 A, 250 V

50

0

¹Fuse size 6.3 × 32 mm

²Fuse size 5 × 20 mm

Static Input Current Characteristic

I_i(A)

04044

20.00

2

3

t [ms]

1

Fig. 5

Typical inrush current versus time at U_{i max}, R_ext= 0.

For AK, BK and FK as well as for application related val-

ues use the formula given in Inrush Current Peak Value to

get realistic results.

10.00

AK

Input Under-/Overvoltage Lock-out

If the input voltage remains below approx. 0.8 U_{i min}or ex-

ceeds approx. 1.1 U_{i max}, an internally generated inhibit sig-

nal disables the output(s). When checking this function the

absolute maximum input voltage rating U_{i abs}should be

considered! Between U_{i min}and the undervoltage lock-out

level the output voltage may be below the value defined in

table: Output data (see: Technical Information: Measuring

and Testing).

BK

FK

CK

1.00

0.40

DK

EK

U_i

____

Hold-up Time versus relative Input Voltage

U_{i min}

1

2

3

4

5

Fig. 3

t_h(ms)

Typical input current versus relative input voltage

04045

EK

Inrush Current Peak Value

100.00

The inrush current peak value (initial switch-on cycle) can

be determined by following calculation: (See also: Input In-

rush Current Characteristic)

CK/FK

DK

U_{i source}

I_{inr p}= ––––––––––––––––

10.00

(R_{s ext}+ R_i+ R_NTC

)

AK

BK

05109

R_{s ext}

I_{inr p}

R_i

R_NTC

1.00

+

C_{i int}

U_{i source}

U_i

____

0.10

Fig. 4

1

2

3

4

5

6

U_{i min}

Equivalent circuit for input impedance

Fig. 6

Reverse Polarity

Typical hold-up time t_hversus relative input voltage

U_i/U_{i min}. The DC-DC converters require an external series

diode in the input path if other loads are connected to the

same input supply lines.

The units are not protected against reverse polarity at the

input to avoid unwanted power losses and may be dam-

aged.

Edition 4/4.99

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DC-DC Converters >100Watt

K Series

Electrical Output Data

General Conditions

– T_A= 25°C, unless T_Cis specified.

– Pin 18 (i) connected to pin 14 (S–/Vo1–), U_oadjusted to U_{o nom}(option P), R input not connected.

– Sense line pins 12 (S+) and 14 (S–) connected to Vo1+ and Vo1– respectively.

Table 4a: Output data single output modules AK/BK

Output

AK/BK 1001

5.1 V

AK/BK 1301

12.0 V

AK/BK 1501

15.0 V

AK/BK 1601

24.0 V

Characteristics

Conditions

min typ max

Unit

V

U_o

Output voltage

U_{i nom}, I_{o nom}

5.07

5.13 11.93

12.07 14.91

15.09 23.86

24.14

U_{o P}Overvoltage protection

(suppressor diode)

7.6

20.0/25.0

21/26

21

26.5

43.5

5.0/6.0

5.2/6.2

I_{o nom}Output current ¹

U_{i min}…U_{i max}

T_{C min}…T_{C max}

10.0/12.0

8.0/10.0

A

I_{o L}

Output current limit ⁴

U_{i min}…U_{i max}

10.2/12.2

8.2/10.2

7

u_o

Output Switching freq. U_{i nom}, I_{o nom}

10

60

5

mV_pp

mV

voltage

noise

IEC/EN 61204

BW = 20 MHz

Total

40

30

50

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±15

±25

±30

DU_{o I}Static load regulation

U_{i nom}, I_o=

(0.1…1) I_{o nom}

20

25

30

±150

0.5

40

5

u_{o d}

Dynamic

load

Voltage

deviation

U_{i nom}, I_o=

±220

0.6

±110

0.6

±130

1

I

_{o nom}↔ /

2

I_{o nom}

regulation

IEC/EN 61204

5

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}…T_{C max}

of output voltage ⁶

0...I _{o nom}

–0.2

–1

mV/K

¹If the output voltages are increased above U_{o nom}through R-input control, option P setting, remote sensing or option T, the output cur-

rent should be reduced accordingly so that P_{o nom}is not exceeded.

⁴See: Output voltage regulation of single output units.

⁵See: Dynamic load regulation of U_o1

.

⁶Negative temperature coefficient (0...–3 mV/cell and K) available on request

⁷Measured according to IEC/EN 61204 sub clause 3.10 with a probe acc. to annex A of the same standards. (see: Technical Informa-

tion: Measuring and Testing)

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Table 4b: Output data double output modules AK/BK

Output

AK/BK 2320

24 V (2 × 12 V)

AK/BK 2540

30 V (2 × 15 V)

AK/BK 2660

48 V (2 × 24 V)

(Outputs connected in Series)

Characteristics

Conditions

min

typ

24.0 ²

38

max

min

typ

30.0 ²

48

max

min

typ

48.0 ²

74

max

Unit

V

U_o

Output voltage

U_{i nom}, I_{o nom}

U_{o P}Overvoltage protection

(suppressor diode)

I_{o nom}Output current ¹

U_{i min}…U_{i max}

T_{C min}…T_{C max}

5.0/6.0

4.0/5.0

2.5/3.0

A

I_{o L}

Output current limit ⁴

U_{i min}…U_{i max}

5.2/6.2

4.2/5.2

2.7/3.2

7

u_o

Output Switching freq. U_{i nom}, I_{o nom}

10

60

5

mV_pp

mV

voltage

noise ³

IEC/EN 61204

BW = 20 MHz

Total

60

70

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±15

±20

DU_{o I}Static load regulation

U_{i nom}, I_o=

(0.1…1) I_{o nom}

25

±180

0.3

25

±160

0.2

35

±100

0.2

5

u_{o d}

Dynamic

load

Voltage

deviation

U_{i nom}, I_o=

I_{o nom}↔ ¹/

2

I_{o nom}

regulation

IEC/EN 61204

5

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}…T_{C max}

of output voltage ⁶

0...I _{o nom}

–2

mV/K

¹If the output voltages are increased above U_{o nom}through R-input control, option P setting, remote sensing or option T, the output cur-

rent should be reduced accordingly so that P_{o nom}is not exceeded.

²Series connection for U_{o nom}= 24 V, 30 V or 48 V, see: R-Function for Different Output Configurations.

³Shortest possible wiring for series connection at the connector.

⁴See: Output voltage regulation of single output units.

⁵See: Dynamic load regulation of U_o1and U_o2

.

⁶Negative temperature coefficient (0...–3 mV/cell and K) available on request.

⁷Measured according to IEC/EN 61204 sub clause 3.10 with a probe acc. to annex A of the same standards. (See: Technical Informa-

tion: Measuring and Testing.)

Edition 4/4.99

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DC-DC Converters >100Watt

K Series

Table 4c: Output data double output modules AK/BK

Output

AK/BK 2320

12 V/12 V

AK/BK 2540

15 V/15 V

(Outputs independently loaded) ¹

Characteristics

Conditions

Output 1

min typ max

11.93

Output 2

Output 1

Output 2

min typ max Unit

min typ max

2

U_o

Output voltage

U_{i nom}, I_{o nom}

12.07 11.82

12.18 14.91

15.09 14.78

15.23

V

U_{o P}Overvoltage protection

(suppressor diode)

19

5.0/6.0

5.2/6.2

19

24

I_{o nom}Output current ³

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

T_{C min}...T_{C max}

5.0/6.0

4.0/5.0

A

I_{o L}

Output current limit ⁴

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

5.2/6.2

4.2/5.2

9

u_o

Output Switching freq. U_{i nom}, I_{o nom}

10

50

10

20

10

50

10

20

mV

pp

voltage

noise

IEC/EN 61204

BW = 20 MHz

Total

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±30

mV

8

DU_{o I}Static load regulation

U_{i nom}, I_o=

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

50

5

6

u_{o d}

Dynamic

load

regulation

Voltage

deviation

U_{i nom}, I_o=

±80

0.2

–1

±80

0.2

–1

I_{o nom}↔ ¹/

2

I_{o nom}

IEC/EN 61204

6

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}...T_{C max}

of output voltage ⁷

0...I _{o nom}

mV/K

Table 4d: Output data double output modules AK/BK

Output

AK/BK 2660

24 V/24 V

(Outputs independently loaded) ¹

¹Depending upon the desired out-

put configuration the wiring should

be made as shown in: R-Function

for Different Output Configurations.

²Same conditions for both outputs.

³If the output voltages are in-

creased above U_{o nom}via R-input

control, option P setting, remote

sensing or option T, the output cur-

rents should be reduced accord-

ingly so that P_{o nom}is not ex-

ceeded.

Characteristics

Conditions

Output 1

Output 2

min typ max min typ max Unit

2

U_o

Output voltage

U_{i nom}, I_{o nom}

23.86

24.14 23.64

24.36

V

A

U_{o P}Overvoltage protection

(suppressor diode)

37

2.5/3.0

2.7/3.2

37

I_{o nom}Output current ³

U_{i min}…U_{i max}

T_{C min}…T_{C max}

2.5/3.0

I_{o L}

Output current limit ⁴

U_{i min}…U_{i max}

2.7/3.2

9

⁴See: Output voltage regulation of

single output units.

u_o

Output Switching freq. U_{i nom}, I_{o nom}

5

mV_pp

mV

voltage

noise

IEC/EN 61204

BW = 20 MHz

Total

60

30

⁵Condition for specified output.

Other output loaded with constant

current I_o= I_{o nom}

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±40

⁶See: Dynamic load regulation of

U_o1and U_o2

.

8

⁷Negative temperature coefficient

(0…–3 mV/cell and K) available on

request.

DU_{o I}Static load regulation

U_{i nom}, I_o=

(0.1…1)I_{o nom}

70

5

6

u_{o d}

Dynamic

load

Voltage

deviation

U_{i nom}, I_o=

I_{o nom}↔ ¹/

IEC/EN 61204

±50

0.2

–1

⁸See: Output Voltage Regulation of

Double Output Modules.

2

I_{o nom}

regulation

⁹Measured according to IEC/EN

61204 sub clause 3.10 with a

probe acc. to annex A of the same

standards. (see: Technical Infor-

mation: Measuring and Testing)

6

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}…T_{C max}

of output voltage ⁷

mV/K

0...I _{o nom}

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DC-DC Converters >100Watt

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Table 4e: Output data single output modules CK...EK

Output

CK...DK 1001

5.1 V

CK...EK 1301

12.0 V

CK...EK 1501

15.0 V

CK...EK 1601

24.0 V

Characteristics

Conditions

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

U_o

Output voltage

U_{i nom}, I_{o nom}

5.07

26

5.13 11.93

12.07 14.91

15.09 23.86

24.14

V

U_{o P}Overvoltage protection

(suppressor diode)

7.6

21

26.5

10.0

43.5

6.0

I_{o nom}Output current ¹

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

T_{C min}...T_{C max}

25.0

12.0

A

I_{o L}

Output current limit ⁴

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

12.2

10.2

6.2

7

u_o

Output Switching freq. U_{i nom}, I_{o nom}

10

50

5

mV

pp

voltage

noise

IEC/EN 61204

BW = 20 MHz

Total

40

30

50

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±15

±25

±30

±30 mV

DU_{o I}Static load regulation

U_{i nom}, I_o=

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

20

25

30

40

5

u_{o d}

Dynamic

load

regulation

Voltage

deviation

U_{i nom}, I_o=

±100

0.3

±100

0.5

±100

0.4

±80

0.3

–2

I_{o nom}↔ ¹/

2

I_{o nom}

IEC/EN 61204

5

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}...T_{C max}

of output voltage ⁶

0...I_{o nom}

–1

mV/K

Table 4f: Output data double output modules CK...EK

Output

CK...EK 2320

24 V (2 × 12 V)

CK...EK 2540

30 V (2 × 15 V)

CK...EK 2660

48 V (2 × 24 V)

(Outputs connected in Series)

Characteristics

Conditions

min

typ

24.0 ²

38

max

min

typ

30.0 ²

48

max

min

typ

48.0 ²

74

max

Unit

V

U_o

Output voltage

U_{i nom}, I_{o nom}

U_{o P}Overvoltage protection

(suppressor diode)

I_{o nom}Output current ¹

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

T_{C min}...T_{C max}

6.0

5.0

3.0

A

I_{o L}

Output current limit ⁴

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

6.2

5.2

3.2

7

u_o

Output Switching freq. U_{i nom}, I_{o nom}

15

20

mV_pp

mV

voltage

noise ³

IEC/EN 61204

BW = 20 MHz

Total

100

120

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±40

±30

±50

DU_{o I}Static load regulation

U_{i nom}, I_o=

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

40

±100

0.3

30

±100

0.5

40

±100

0.4

5

u_{o d}

Dynamic

load

Voltage

deviation

U_{i nom}, I_o=

I_{o nom}↔ ¹/

IEC/EN 61204

2

I_{o nom}

regulation

5

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}...T_{C max}

of output voltage ⁶

0...I_{o nom}

–2.2

–2.6

mV/K

¹If the output voltages are increased above U_{o nom}through R-input control, option P setting, remote sensing or option T, the output cur-

rent should be reduced accordingly so that P_{o nom}is not exceeded.

²Series connection for U_{o nom}= 24 V, 30 V or 48 V, see: R-Function for Different Output Configurations.

³Shortest possible wiring for series connection at the connector.

⁴See: Output voltage regulation of single output units.

⁵See: Dynamic load regulation of U_o1and U_o2

.

⁶Negative temperature coefficient (0...–3 mV/cell and K) available on request

⁷Measured according to IEC/EN 61204 sub clause 3.10 with a probe acc. to annex A of the same standards. (See Technical Informa-

tion: Measuring and Testing.)

Edition 4/4.99

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K Series

Table 4g: Output data double output modules CK...EK

Output

CK...EK 2320

12 V/12 V

CK...EK 2540

15 V/15 V

(Outputs independendtly loaded) ¹

Characteristics

Conditions

Output 1

Output 2

Output 1

Output 2

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

2

U_o

Output voltage

U_{i nom}, I_{o nom}

11.93

12.07 11.82

12.18 14.91

15.09 14.78

15.22

V

A

U_{o P}Overvoltage protection Failure in

19

24

(suppressor diode)

control circuit

I_{o nom}Output current ³

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

T_{C min}...T_{C max}

6.0

5.0

I_{o L}

Output current limit ⁴

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

6.2

5.2

9

u_o

Output Switching freq. U_{i nom}, I_{o nom}

5

mV_pp

voltage

noise

IEC/EN 61204

BW = 20 MHz

Total

75

25

100

25

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

±30

±40

±30

±40 mV

8

DU_{o I}Static load regulation

U_{i nom}, I_o=

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

100

5

6

u_{o d}

Dynamic

load

regulation

Voltage

U_{i nom}, I_o=

±100

0.3

±80

0.2

deviation I_{o nom}↔ ¹/

2

I_{o nom}

IEC/EN 61204

6

t_d

Recovery

time

ms

a_Uo

Temperature coefficient T_{C min}...T_{C max}

of output voltage ⁷

0...I_{o nom}

–1.1

mV/K

Table 4h: Output data double output modules CK...EK

Output

CK...EK 2660

24 V/24 V

(Outputs independently loaded) ¹

¹Depending upon the desired out-

put configuration the wiring should

be made as shown in: R-Function

for Different Output Configurations.

²Same conditions for both outputs.

³If the output voltages are in-

creased above U_{o nom}via R-input

control, option P setting, remote

sensing or option T, the output cur-

rents should be reduced accord-

ingly so that P_{o nom}is not ex-

ceeded.

Characteristics

Conditions

Output 1

Output 2

min typ max min typ max Unit

2

U_o

Output voltage

U_{i nom}, I_{o nom}

23.86

24.14 23.64

24.36

V

A

U_{o P}Overvoltage protection

(suppressor diode)

37

I_{o nom}Output current ³

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

T_{C min}...T_{C max}

3.0

I_{o L}

Output current limit ⁴

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

3.2

9

⁴See: Output voltage regulation of

single output units.

u_o

Output Switching freq. U_{i nom}, I_{o nom}

5

mV

pp

voltage

noise

IEC/EN 61204

BW = 20 MHz

Total

100

25

⁵Condition for specified output.

Other output loaded with constant

DU_{o u}Static line regulation

U_{i min}...U_{i nom}

U_{i nom}...U_{i max}

I_{o nom}

,

±30

±50

mV

current I_o= I_{o nom}

.

⁶See: Dynamic load regulation of

U_o1and U_o2.

.

8

⁷Negative temperature coefficient

(0...–3 mV/cell and K) available on

request.

DU_{o I}Static load regulation

U_{i nom}, I_o=

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

50

5

6

u_{o d}

Dynamic

load

Voltage

deviation

U_{i nom}, I_o=

±50

0.2

⁸See: Output Voltage Regulation of

Double Output Modules.

I_{o nom}↔ ¹/

2

I_{o nom}

regulation

IEC/EN 61204

6

t_d

Recovery

time

ms

⁹Measured according to IEC/EN

61204 sub clause 3.10 with a

probe acc. to annex A of the same

standards. (Se:e Technical Infor-

mation: Measuring and Testing.)

a_Uo

Temperature coefficient T_{C min}...T_{C max}

of output voltage ⁷

–1.3

mV/K

0...I_{o nom}

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DC-DC Converters >100Watt

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Thermal Considerations

Output Protection

If a converter is located in free, quasi-stationary air (con-

vection cooling) at the indicated maximum ambient tem-

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

is operated at its nominal input voltage and output power,

the temperature measured at the Measuring point of case

temperature T_C(see: Mechanical 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 integration into a system. The

thermal conditions are influenced by input voltage, output

current, airflow and temperature of surrounding compo-

Each output is protected against overvoltages which could

occur due to a failure of the internal control circuit. Voltage

suppressor diodes (which under worst case condition may

become a short circuit) provide the required protection. The

suppressor diodes are not designed to withstand externally

applied overvoltages. Overload at any of the outputs will

cause a shut-down of all outputs. A red LED indicates the

overload condition.

Parallel or Series Connection of Units

Single or double output units with equal nominal output

voltage can be connected in parallel without any precau-

tions using option T.

nents and surfaces. T_{A max}is therefore, contrary to T_{C max}

,

an indicative value only.

With option T (current sharing), all units share the current

approximately equally.

Caution: The installer must ensure that under all operat-

ing conditions T_Cremains within the limits stated in the

table Temperature specifications.

Single output units and/or main and second outputs of dou-

ble output units can be connected in series with any other

(similar) output.

Notes: Sufficient forced cooling or an additional heat sink

allows T_Ato be higher than 71°C (e.g. 85°C) if T_{C max}is not

exceeded.

Note:

For -7 or -9 units at an ambient temperature T_Aof 85°C with

only convection cooling, the maximum permissible current

for each output is approx. 40% of its nominal value as per

figure.

– Parallel connection of double output units should always

include both, main and second output to maintain good

regulation of both outputs.

– Not more than 5 units should be connected in parallel.

I_o/I_{o nom}

– Series connection of second outputs without involving

their main outputs should be avoided as regulation may

be poor.

Forced cooling

1.0

0.9

0.8

0.7

– The maximum output current is limited by the output with

the lowest current limitation if several outputs are con-

nected in series.

Convection cooling

0.6

05072

U_o1

T_{C max}

0.5

U_o1d

U_r

0.4

0.3

0.2

0.1

U_o1d

t_d

0

T [°C]

A

T

50

60

70

80

90

100

t

A min

U_o2

Fig. 7

Output current derating versus temperature for -7 and -9

units.

U_o2d

Thermal Protection

I_o1/I_{o1 nom}

I_o2/I_{o2 nom}

A temperature sensor generates an internal inhibit signal

which disables the outputs if the case temperature exceeds

T_{C max}. The outputs are automatically re-enabled if the tem-

perature drops below this limit.

1

0.5

0

<10 µs

t

It is recommended that continuous operation under simul-

taneous extreme worst case conditions of the following

three parameters be avoided: Minimum input voltage,

maximum output power and maximum temperature.

Fig. 8

Typical dynamic load regulation of U_o1and U_o2

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K Series

Output Voltage Regulation of Single or Double Output

Modules with Outputs 1 and 2 Connected in Series

[V] U_o2

15.75

05106

I_o1= 5.00 A

I_o1= 3.75 A

I_o1= 2.50 A

I_o1= 1.25 A

I_o1= 0.50 A

U_o

U_{o nom}

05098

15.50

15.25

15.00

14.75

14.50

14.25

14.00

0.98

0.5

I_o1

I_oL

I_o

I_{o nom}

I_o2

[A]

0

0.5

1.0

0

1

2

3

4

5

6

7

I_{o nom}

Fig. 9

_o1vs. I_o1(typ.) of single output units AK...EK

Fig. 11

U

AK...EK 2540: DU_o2(typ.) vs. I_o2with different I₀₁

Output Voltage Regulation of Double Output Modules

[V] U_o2

Output 1 is under normal conditions regulated to U_{o1 nom}

,

independent of the output currents.

05107

26.0

25.5

25.0

24.5

24.0

23.5

23.0

I_o1= 3.0 A

I_o1= 2.0 A

I_o1= 1.0 A

I_o1= 0.5 A

I_o1= 0.3 A

U_o2is dependent upon the load distribution. If both outputs

are loaded with more than 10% of I_{o nom}, the deviation of

U_o2remains within ±5% of the value of U_o1. The following 3

figures show the regulation with varying load distribution. If

I_o1= I_o2or the two outputs are connected in series, the de-

viation of U_o2remains within ±1% of the value of U_o1pro-

vided that a total load of more than 10% of I_{o nom}is applied.

Two outputs of a single K 2000 module connected in paral-

lel will behave like the output of a K 1000 module; the paral-

leled output is fully regulated. No precautions are neces-

sary in using the R-input and the test sockets.

[V] U_o2

I_o2

[A]

05105

12.6

0

0.5

1

1.5

2

2.5

3

3.5

4

I_o1= 6.0 A

I_o1= 4.5 A

I_o1= 3.0 A

I_o1= 1.5 A

I_{o nom}

12.4

Fig. 12

AK...EK 2660: DU_o2(typ.) vs. I_o2with different I₀₁

12.2

12.0

11.8

11.6

11.4

11.2

I_o1= 0.6 A

I_o2

0

1

2

3

4

5

6

7

8

[A]

I_{o nom}

Fig. 10

AK...EK 2320: DU_o2(typ.) vs. I_o2with different I₀₁

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DC-DC Converters >100Watt

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Auxiliary Functions

i Inhibit for Remote On and Off

Sense Lines

Note: With open i input: Output is disabled (U_o= off).

(Only for single output units 5.1 V, 12 V, 15 V, 24 V)

The outputs of the module may be enabled or disabled by This feature enables for compensation of voltage drops

means of a logic signal (TTL, CMOS, etc.) applied between across the connector contacts and if necessary, across the

the inhibit input i and the negative pin of output 1 (Vo1–). In load lines. If the sense lines are connected at the load

systems with several units, this feature can be used, for ex- rather than directly at the connector, the user should ensure

ample, to control the activation sequence of the converters. that U_{o max}(between Vo1+ and Vo1–) is not exceeded. We

If the inhibit function is not required, connect the inhibit pin recommend connecting the sense lines directly at the fe-

18 to pin 14 to enable the outputs (active low logic, fail male connector.

safe). For output response refer to: Hold-up Time and Out-

put Response.

For further information, please refer to: Application Notes.

To ensure correct operation, both sense lines (S+ and S–)

06031

should be connected to their respective power outputs

(Vo1+ and Vo1–) and the voltage difference between any

sense line and its respective power output pin (as meas-

ured on the connector) should not exceed the following val-

ues:

Vo+

i

Vi+

I_inh

U_inh

Table 6: Maximum voltage compensation allowed using

sense lines

Vo–

Vi–

Output

voltage

Total voltage difference Voltage difference

Fig. 13

Definition of U_inhand I_inh

between sense lines and

their respective outputs

between

Vo– and S–

.

5.1 V

< 0.5 V

< 1.0 V

< 0.25 V

Table 5: Inhibit characteristics

12 V, 15 V

Characteristic

Conditions min typ max Unit

U_inhInhibit U_o= on U_{i min}…U_{i max}–50

0.8

50

V

If the output voltages are increased above U_{o nom}via R-in-

put control, option P setting, remote sensing or option T, the

output currents must be reduced accordingly so that

P_{o nom}is not exceeded.

voltage

U_o= off

2.4

I_inhInhibit current

U_inh= 0

–400 µA

t_r

t_f

Rise time

Fall time

30

ms

Note: The output terminals Vo1+ and Vo1– must always be

connected to the load before connecting the sense lines S+

and S–, otherwise the unit will be damaged.

depending on I_o

I_inh[mA]

U_inh= 2.4 V

U_inh= 0.8 V

2.0

1.6

1.2

0.8

0.4

U_o= on

U_o= off

0

–0.4

–0.8

U_inh[V]

–50

–30

–10

0

10

30

50

Fig. 14

Typical inhibit current I_inhversus inhibit voltage U_inh

06001

U_o/U_{o nom}

1

0.1

0

t

t_f

t_r

Inhibit

1

t

0

Fig. 15

Typical output response as a function of inhibit control

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K Series

Programmable Output Voltage (R-Function)

As a standard feature, the modules offer an adjustable out-

put voltage, identified by letter R in the type designation.

The control input R (pin 16) accepts either a control voltage

U_extor a resistor R_extto adjust the desired output voltage.

When not connected, the control input automatically sets

– If the output voltages are increased above U_{o nom}via R-

input control, option P setting, remote sensing or option

T, the output current(s) should be reduced accordingly so

that P_{o nom}is not exceeded.

– The R-input (as well as option P) is related to the main

output.

the output voltage to U_{o nom}

.

– With double output units the second output follows the

value of the controlled main output. Resistor values as

indicated for the single output units should be used.

– For correct output voltage adjustment of double output

units the external wiring of the outputs should be accord-

ing to: R-Function for Different Output Configurations,

depending upon the desired output configuration.

– In case of parallel connection the output voltages should

be individually set within a tolerance of 1 - 2%.

05074

a) Adjustment by means of an external control voltage U_ext

between pin 16 (R) and pin 14:

The control voltage range is 0...2.75 V DC and allows an

output voltage adjustment in the range of approximately

0...110% U_{o nom}

U

.

U_ext= –––^o––– • 2.5 V (approximate formula)

U_{o nom}

b) Adjustment by means of an external resistor:

Depending upon the value of the required output voltage

the resistor shall be connected

Vo1+

Vi+

R

+

Either: Between pin 16 and pin 14 (U_o< U_{o nom}) to

achieve an output voltage adjustment range of approxi-

mately 0...100% U_{o nom}

16

14

U_ext

S–

or: Between pin 16 and pin 12 (U_o> U_{o nom}) to achieve an

output voltage adjustment range of approximately

Vo1–

Vi–

100...110% U_{o nom}

.

Vo1+

Vi+

Warning:

– U_extshall never exceed 2.75 V DC.

S+

R

12

R'_ext

R_ext

– The value of R'_extshall never be less than the lowest

value as indicated in table R'_extfor (U_o> U_{o nom}) to

avoid damage to the unit!

16

14

S–

Vo1–

Vi–

Remarks:

– The R-Function excludes option P (output voltage adjust-

ment by potentiometer).

Fig. 16

Output voltage control for single output units AK...EK 1000

by means of the R input

Table 7a: R_extfor U_o< U_{o nom}; approximative values (U_{i nom}, I_{o nom}, series E 96 resistors); R'_ext= ∞

U_{o nom}= 5.1 V

U_o(V) R_ext[kΩ]

U_{o nom}= 12 V

U_o[V] ¹

U_{o nom}= 15 V

U_o[V] ¹

U_{o nom}= 24 V

U_o[V] ¹

R_ext[kΩ]

0.825

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0.422

1.0

2

3

4

5

6

7

8

9

10

11

4

6

8

10

12

14

16

18

20

22

0.825

1.3

2

4

6

8

9

10

11

12

13

14

4

8

0.56

1.47

2.61

4.64

6.19

8.25

11.0

16.2

26.1

56.2

4

6

8

10

12

14

16

18

20

22

8

12

16

20

24

28

32

36

40

44

1.33

1.96

2.87

3.83

5.61

8.25

12.1

19.6

46.4

1.62

2.16

3.83

5.61

9.09

14.7

28.7

196

1.96

2.87

3.83

5.62

8.28

12.1

19.6

42.2

12

16

18

20

22

24

26

28

Table 7b: R’_extfor U_o> U_{o nom}; approximative values (U_{i nom}, I_{o nom}, series E 96 resistors); R_ext= ∞

U_{o nom}= 5.1 V

U_o[V] R'_ext[kΩ]

5.15 422

U_{o nom}= 12 V

U_o[V] ¹

U_{o nom}= 15 V

U_o[V] ¹

U_{o nom}= 24 V

R'_ext[kΩ]

U_o[V] ¹

R'_ext[kΩ]

12.1

12.2

12.3

12.4

12.5

12.6

12.7

12.8

13.0

13.2

24.2

24.4

24.6

24.8

25.0

25.2

25.4

25.6

26.0

26.4

1780

909

623

464

383

316

286

234

196

162

15.2

15.4

15.6

15.8

16.0

16.2

16.4

16.5

30.4

30.8

31.2

31.6

32.0

32.4

32.8

33.0

1470

750

511

383

316

261

237

215

24.25

24.5

24.75

25.0

25.25

25.5

25.75

26.0

48.5

49.0

49.5

50.0

50.5

51.0

51.5

52.0

52.5

52.8

3160

1620

1100

825

681

562

511

464

422

383

5.2

5.25

5.3

215

147

110

5.35

5.4

90.9

75

5.45

5.5

61.9

56.2

26.25

26.4

¹First column: single output units or double output units with separated outputs, second column: outputs in series connection

Edition 4/4.99

MELCHER

15/31

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

R-Function for Different Output Configurations

06004

06005

+

Vo2+

Vo2–

Vo1+

Vo1–

Vo2+

Vo2–

Vo1+

Vo1–

4

6

4

6

12 V

15 V

24 V

1

U_o1

24 V

30 V

48 V

8

1

U_o1

–

10

12

14

10

12

2

–

14

16

R_extR'_ext

16

R

Fig. 17a

Fig. 17b

AK...EK 2000 with H15 connector. R-input for output volt-

age control. Wiring for output voltage 24 V or 30 V or 48 V

with main and second output connected in series.

AK...EK 2000 with H15 connector. R-input for output volt-

age control. Wiring for output voltage 12 V or 15 V or

24 V with main and second output connected in parallel.

06006

06007

+24/+30/+48 V

0 V

Vo2+

Vo2–

Vo1+

Vo1–

Vo2+

Vo2–

Vo1+

Vo1–

4

6

4

6

+

1

U_o2

–12/–15/–24 V

–

8

U_o2

+12/+15/+24 V

0 V

U_o1

10

12

+

10

12

2

1

U_o1

+12/+15/+24 V

+

14

16

14

16

R_extR'_ext

R

Fig. 17c

Fig. 17d

AK...EK 2000 with H15 connector. R-input for output volt-

age control. Wiring of main and second output for two

symmetrical output voltages U_o1and U_o2: ±12 V or ±15 V

or ±24 V.

AK...EK 2000 with H15 connector. R-input for output volt-

age control. Wiring of main and second output for two

output voltages U_o1and U_o2: +12 V and +24 V or +15 V

and +30 V or +24 V and +48 V.

¹A ceramic multilayer capacitor connected across the output

lines reduces ripple and spikes.

06008

+

Vo2+

Vo2–

Vo1+

Vo1–

4

6

²Shortest possible wiring for series connection at the female con-

nector

12 V

15 V

24 V

1

U_o2

–

8

+

10

12

12 V

15 V

24 V

U_o1

–

Remarks:

14

16

R_extR'_ext

Double output units ﬁtted with H-15 connectors have the

output pins of the second output, pins 4/6 and 8/10, inter-

nally paralleled.

R

It is recommended that pins 4/6 and 8/10 be directly paral-

leled at the female connector as well to reduce the voltage

drop across the connector.

Fig. 17e

AK...EK 2000 with H15 connector. R-input for output volt-

age control. Wiring of main and second output for two out-

put voltages U_o1and U_o2: 12 V/12 V or 15 V/15 V or

24 V/24 V, the outputs are galvanically isolated.

Please note: U_o2varies depending upon its own load and

the load on output 1.

Edition 4/4.99

16/31

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

Display Status of LEDs

06002

U_o1> 0.95...0.98U_{o1 adj}

Fig. 18

OK

i

I_{o L}

LEDs "OK", "i" and "I_{o L}"status versus input voltage

Conditions: I_o£ I_{o nom}, T_C£ T_{C max}, U_inh£ 0.8 V

U_{i uv}= undervoltage lock-out, U_{i ov}= overvoltage lock-out

U_i

U_{i uv}U_{i min}

U_{i max}U_{i ov}U_{i abs}

U_o1> 0.95...0.98U_{o1 adj}

U_o1< 0.95...0.98U_{o1 adj}

OK

LEDs "OK" and "I_{o L}"status versus output current

Conditions: U_{i min}...U_{i max}, T_C£ T_{C max}, U_inh£ 0.8 V

I_{o L}

I_o

I_{o nom}

I_oL

i

LED "i"versus case temperature

Conditions: U_{i min}...U_{i max}, I_o£ I_{o nom}, U_inh£ 0.8 V

T_C

T_{C max}

T_{PTC threshold}

U_{inh threshold}

LED "i"versus U_inh

U_{i inh}

Conditions: U_{i min}...U_{i max}, I_o£ I_{o nom}, T_C£ T_{C max}

+0.8 V

+2.4 V

+50 V

-50 V

LED off

LED Status undefined

LED on

Test Sockets (Main output only)

Test sockets for measuring the output voltage U_o1are lo-

cated at the front of the module. The positive test socket is

protected by a series resistor (see: Functional Description,

block diagrams). The voltage measured at the test sockets

is approximetly 30 mV lower than the value measured at

the output terminals.

In case of double output units externally connected in se-

ries for U_o= 24 V, 30 V or 48 V the monitored output voltage

is 12 V, 15 V or 24 V respectively.

Edition 4/4.99

17/31

MELCHER

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

Electromagnetic Compatibility (EMC)

A suppressor diode or a metal oxide VDR (depending upon

the type) together with an input fuse and an input filter form

an effective protection against high input transient voltages

which typically occur in most installations, but especially in

battery driven mobile applications. The K series has been

successfully tested to the following specifications:

Electromagnetic Immunity

Table 8: Immunity type tests

Phenomenon

Standard ¹

Level

Coupling

mode ²

Value

applied

Waveform

Source

imped.

Test

procedure

In

Per-

oper. form. ³

Voltage surge

IEC 60571-1

i/c, +i/–i

800 V_p

1500 V_p

3000 V_p

4000 V_p

7000 V_p

3.5 • U_batt

1.5 • U_batt

960 V_p

100 µs

50 µs

100 Ω

1 pos. and 1 neg.

voltage surge per

coupling mode

yes

A

5 µs

1 µs

100 ns

Supply related

surge

RIA 12

A ⁴

B

C

D

E

F

+i/–i

2/20/2 ms

0.1/1/0.1 s

10/100 µs

5/50 µs

0.5/5 µs

0.1/1 µs

0.05/0.1 µs

5/50 µs

0.5/5 µs

0.1/1 µs

0.05/0.1 µs

1/50 ns

0.2 Ω

5 Ω

1 positive

surge

yes

A

B

Direct transient

+i/c, –i/c

5 pos. and 5 neg.

impulses

1800 V_p

3600 V_p

4800 V_p

8400 V_p

1800 V_p

3600 V_p

4800 V_p

8400 V_p

100 Ω

G

H

J

5

Indirect coupled

transient

+o/c, –o/c,

K

L

Electrostatic

discharge

(to case)

IEC/EN

61000-4-2

4

contact discharge 8000 V_p

330 Ω

10 positive and

10 negative

discharges

yes

A

air discharge

15000 V_p

Electromagnetic IEC/EN

3

4

antenna

10 V/m

AM 80%

1 kHz

n.a.

26…1000 MHz

yes

A

field

61000-4-3

Electromagnetic ENV 50204

field,

pulse modulated

50% duty cycle,

200 Hz repetition

frequency

900 ±5 MHz

Electrical fast

transient/burst

IEC/EN

61000-4-4

capacitive, o/c

2000 V_pbursts of 5/50 ns 50 Ω

1 min positive

1 min negative

transients per

coupling mode

yes

A

2.5/5 kHz over

15 ms; burst

period: 300 ms

i/o, +i/–i

direct

4000 V_p

Surge

IEC/EN

61000-4-5

3

4

i/c

2000 V_p

1.2/50 µs

12 Ω

2 Ω

5 pos. and 5 neg.

surges per

coupling mode

yes

A

+i/–i

Conducted

disturbances

IEC/EN

61000-4-6

3

i, o, signal wires

10 V_rms

(140 dBµV)

AM 80%

1 kHz

150 Ω

0.15...80 MHz

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

²i = input, o = output, c = case.

³A = Normal operation, no deviation from specifications, B = Normal operation, temporary deviation from specs possible.

⁴Only met with extended input voltage range of CK (48 V battery) and EK (110 V battery) types. These units are available on custom-

er's request. Standard DK units (110 V battery) will not be damaged, but overvoltage lock-out will occur during the surge. Under nor-

mal operation temporary deviation from specifications possible.

⁵Test in progress, please consult factory.

Note: Previous standards are referenced in: Technical Information: Standards.

Edition 4/4.99

MELCHER

18/31

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

Electromagnetic Emission

u [dBµV]

07037

90

[dBµV/m]

07077

50

A

80

70

60

50

40

30

20

10

0

A

B

40

B

30

20

10

[MHz]

0

f

[MHz]

Fig. 19

Fig. 20

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

cording to CISPR 11/22 and EN 55011/22, measured at

Typical radiated electromagnetic field strength (quasi-

peak) according to CISPR 11/22 and EN 55011/22, nor-

malized to a distance of 10 m, measured at U_{i nom}and

U_{i nom}and I_{o nom.}

I_{o nom}

.

Edition 4/4.99

19/31

MELCHER

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

Immunity to Environmental Conditions

Table 9: Mechanical stress

Test method

Standard

Test conditions

Status

Ca

Ea

Eb

Fc

Damp heat

steady state

IEC/DIN IEC 60068-2-3

MIL-STD-810D section 507.2 Relative humidity:

Duration:

Temperature:

40 ^±2°C

%

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

MIL-STD-810D section 514.3

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)

Fda Random vibration IEC 60068-2-35

Acceleration spectral density: 0.05 g_n²/Hz

Unit

wide band

Reproducibility

high

DIN 40046 part 23

Frequency band:

Acceleration magnitude:

Test duration:

20...500 Hz

4.9 g_{n rms}

3 h (1 h each axis)

operating

Kb

Salt mist, cyclic

(sodium chloride

NaCl solution)

IEC/EN/DIN IEC 60068-2-52 Concentration:

5% (30°C)

Unit not

operating

Duration:

Storage:

Storage duration:

Number of cycles:

2 h per cycle

40°C, 93% rel. humidity

22 h per cycle

3

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

Temperature

Standard -7

Option -9

Characteristics

Conditions

Operational ²

min

max

71

min

–40

–55

max

71

Unit

T_A

T_C

T_S

Ambient temperature ¹

Case temperature ³

Storage temperature ¹

–25

–40

°C

95

Non operational

100

¹MIL-STD-810D section 501.2 and 502.2.

²See: Thermal Considerations.

³Overtemperature lock-out at T_C>95°C (PTC).

Table 11: MTBF

Values at specified

case temperature

Module types

Ground benign

Ground fixed

Ground mobile Unit

40°C

70°C

50°C

MTBF ¹

AK...EK

500'000

150'000

80'000

50'000

h

Device hours ²

500'000

¹Calculated in accordance with MIL-HDBK-217F.

²Statistical values, based on an average of 4300 working hours per year and in general field use, over 3 years.

Edition 4/4.99

MELCHER

20/31

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

7 TE

9 TE

3.27

Mechanical Data

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

159

4.5

Test jacks (+/–)

Option P (U_o)

Option D (U_to)

Option D (U_ti)

LED i (red)

LED OK (green)

LED I_oL(red)

Measuring point of

case temperature T_C

= Ø 3.5

= Ø 4.1

50

42

171.93 (DIN 41494)

Main face

80

d

Front plate

Back plate

168.5 ^±0.5

European

Projection

Note:

– d ≥15 mm, recommended minimum distance to

next part to ensure proper air circulation at full

output power.

Fig. 21

– free air locations: the module should be moun-

ted with fins in vertical position to achieve a

maximum air flow through the heat sink.

Case K02 with heatsink, case aluminium, black finish and

self cooling, weight: Approx. 1.55 kg

7 TE

3.27

4 TE

50

5

158

M 4

Measuring point of

case temperature T_C

5

47.2

17.3

133.4

168 ^±0.5

171.93 (DIN 41494)

Note: Long case with S-type heatsink

or cooling plate B2, elongated by 60 mm

for 220 mm rack depth, is available on

request. (No LED's and no test jacks.)

Fig. 22

Case K02 with option B1 (cooling plate),case aluminium,

black finish and self cooling, weight: Approx. 1.15 kg

Edition 4/4.99

21/31

MELCHER

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K Series

DC-DC Converters >100Watt

Rugged Environment

Safety and Installation Instructions

Connector Pin Allocation

The connector pin allocation table defines the electrical

potentials and the physical pin positions on the H15/H15 S4

connector. Pin no. 24, the protective earth pin present on all

AK...FK DC-DC converters is leading, ensuring that it

makes contact with the female connector first.

10010

Fixtures for connector

retention clips V

Fixtures for connector

retention clips V

(see Accessory Products)

32

4

30/32

4/6

Type H15 S4

Type H15

Fig. 23

View of module's male connectors

Table 12: H15 and H15 S4 connector pin allocation

No.

4

Connector type H15 S4

Connector type H 15

AK 1000 (all), BK...EK 1001

AK 2000

BK…EK 1301/1501/1601

BK…EK 2000

Vo1+

Vo2+

Vo1+

Output 1

Vo2+

Output 2

Output 1

Vo1+

Output 2

6

Vo2+

Vo2–

Vo1+

Vo1–

R ¹

8

Vo1–

Vo2–

Output 1

Vo1–

Output 2

10

12

14

16

18

20

S+

S–

R ¹

i

Sense

Vo1+

Vo1–

R ¹

i

Output 1

Control of U_o1

Inhibit

S+

S–

R ¹

i

Sense

Output 1

Control of U_o1

Inhibit

Sense

Control of U_o1

Inhibit

Control of U_o1

Inhibit

i

D ³

V ³

T

Save data

ACFAIL

D

Safe data

D

Save data

D

Save data

22

24 ²

26

28

30

32

Current sharing

Protective earth

T

Current sharing

Protective earth

T

Current sharing

Protective earth

T

Current sharing

Protective earth

Vi+

Vi–

Vi+

Vi–

Vi+

Input

Vi+

Input

Input or Neutral

Vi–

Input

Vi–

Input

Input or Phase

2

3

¹Feature R excludes option P and vice versa; Leading pin (pregrounding); Option D excludes option V and vice versa.

Installation Instructions

An input fuse is built-in in the connection from pins no. 30

and 32 (Vi-) of the unit. Since this fuse is designed to pro-

tect the unit in case of an overcurrent and does not neces-

sarily cover all customer needs, an external fuse suitable

for the application and in compliance with the local require-

ments might be necessary in the wiring to one or both input

potentials, pins nos. 26 and 28 and/or nos. 30 and 32.

The K series DC-DC converters are components, intended

exclusively for inclusion within other equipment by an in-

dustrial assembly operation or by professional installers. In-

stallation must strictly follow the national safety regulations

in compliance with the enclosure, mounting, creepage,

clearance, casualty, markings and segregation require-

ments of the end-use application.

Connection to the system shall be made via the female con-

nector H15 (see: Accessories). Other installation methods

may not meet the safety requirements.

Important: Whenever the inhibit function is not in use,

pin no. 18 (i) should be connected to pin no. 14 (S–/

Vo1–) to enable the output(s).

The DC-DC converters are provided with pin no. 24 ( ),

which is reliably connected with their case. For safety rea-

sons it is essential to connect this pin with the protective

earth of the supply system unless specified in: Safety of op-

erator accessible output circuit.

Do not open the modules, or guarantee will be invali-

dated.

Edition 4/4.99

22/31

MELCHER

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Rugged Environment

DC-DC Converters >100Watt

K Series

Due to high current values, all AK...FK units provide two in-

ternally parallel connected contacts for certain paths (pins

4/6, 8/10, 26/28 and 30/32 respectively). It is recommended

to connect load and supply to both female connector pins of

each path in order to keep the voltage drop across the con-

nector pins to an absolute minimum and to not overstress

the connector contacts if currents are higher than approx. 8

A. The connector contacts are rated 8 A over the whole

temperature range.

Standards and approvals

All DC-DC converters correspond to class I equipment.

They are UL recognized according to UL 1950, UL recog-

nized 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 between input and case and double or

reinforced insulation between input and output, based

on 150 V AC/DC (AK and BK) or 250 VAC and 400 V DC

(CK, DK, EK, FK),

Make sure that there is sufficient air flow possible for con-

vection cooling. This should be verified by measuring the

case temperature when the unit is installed and operated in

the end-use application. The maximum specified case tem-

perature T_{C max}shall not be exceeded. See also Thermal

Considerations.

•

The use in a pollution degree 2 environment,

Connecting the input to a primary or secondary circuit

which is subject to a maximum transient rating of

2500 V.

If the end-product is to be UL certified, the temperature of

the main isolation transformer should be evaluated as part

of the end-product investigation.

The DC-DC converters are subject to manufacturing sur-

veillance in accordance with the above mentioned UL,

CSA, EN and with ISO 9001 standards.Cleaning Agents

Check for hazardous voltages before altering any connec-

tions.

In order to avoid possible damage, any penetration of

cleaning fluids is to be prevented, since the power supplies

are not hermetically sealed.

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.

Protection Degree

Condition: Female connector fitted to the unit.

Cleaning Agents

IP 30: All units except those with option P, and except

those with option D or V with potentiometer.

In order to avoid possible damage, any penetration of

cleaning fluids is to be prevented, since the power supplies

are not hermetically sealed.

IP 20: All units fitted with option P, or with option D or V with

potentiometer.

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. Melcher will not honour any guar-

antee claims resulting from electric strength field tests.

Table 13: Isolation

Characteristic

Input to

case

Input to

output

Output to

case

Output to

output

Unit

Electric

strength

test voltage

Required according to

IEC/EN 60950

AK, BK

1.0

1.4

1.5

2.1

2.8

2.0

2.0 ¹

2.8 ¹

3.0 ¹

4.2 ¹

5.6 ¹

4.0 ¹

0.5

0.7

0.5

0.7

1.4

1.0

-

kV_rms

kV DC

kV_rms

-

CK, DK

EK, FK

-

kV DC

Actual factory test 1 s

AK, BK

CK, DK

EK, FK

0.14

0.1

AC test voltage equivalent

to actual factory test

kV_rms

Insulation resistance at 500 V DC

>300

>100 ²

MΩ

¹In accordance with IEC/EN 60950 only subassemblies are tested in factory with this voltage.

²Tested at 150 V DC.

For creepage distances and clearances refer to: Technical

Information: Safety.

Edition 4/4.99

MELCHER

23/31

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

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.

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

nominal voltages if in series or +/– configuration) of 35 V.

However, it is the sole responsibility of the installer to as-

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 14: Safety concept leading to an SELV output circuit

Conditions Front end

DC-DC converter

Result

Nominal

supply

Minimum required grade

of isolation, to be provided output voltage

Nominal DC

Minimum required Types

safety status of the

Measures to achieve the Safety status

specified safety status of of the DC-DC

voltage

by the AC-DC front end,

including mains supplied

battery charger

from the front end front end output

the output circuit

converter

output circuit

circuit

Mains

Operational (i.e. there is

≤100 V (The

Primary circuit

AK

BK

Double or reinforced

insulation, based on

the mains voltage and ²

(provided by the DC-DC

converter) and earthed

case ³

SELV circuit

≤150 V AC no need for electrical

isolation between the

nominal voltage

between any input

pin and earth can

mains supply voltage

and the DC-DC converter be up to 150 V AC

input voltage)

or DC)

Mains

≤250 V AC

≤400 V (The

CK

DK

EK

FK

nominal voltage

between any input

pin and earth can

be up to 250 V AC

or 400 V DC)

Basic

≤400 V

Unearthed

hazardous voltage BK

secodary circuit

AK

Supplementary insulation,

based on 250 V AC and

double or reinforced

insulation ²(provided by

DC-DC converter) and

earthed case ³.

CK

DK

EK

FK

Earthed

hazardous voltage

secondary circuit

Double or reinforced

insulation ²(provided by

the DC-DC converter)

earthed case ³

Double or reinforced

≤60 V

SELV circuit

Operational insulation

(provided by the DC-DC

converter) ⁴

≤120 V

TNV-3 circuit

Basic insulation (provided

by the DC-DC converter) ⁴

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

²Based on the maximum nominal output voltage from the front end.

³The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.

⁴Earthing of the case is recommended, but not mandatory.

Max. 150 V AC or DC for AK, BK

Max. 250 V AC or 400 V DC for CK, DK, EK, FK

10044

+

~

Mains

AC-DC

front

end

DC-DC

con-

verter

Fuse

Battery

SELV

–

~

Max. 150 V AC or DC for AK, BK

Max. 250 V AC or 400 V DC for CK, DK, EK, FK

Earth connection

Fig. 24

Schematic safety concept.

Use earth connection as per table: Safety concept leading

to an SELV output circuit. Use fuse if required by the appli-

cation. See also: Installation Instructions.

Edition 4/4.99

24/31

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

Description of Options

Table 15: Survey of options

Option

-9

Function of Option

Characteristics

Extended operational ambient temperature range

Electronic inrush current limitation circuitry

Potentiometer for fine adjustment of output voltage

Input and/or output undervoltage monitoring circuitry

Input (and output) undervoltage monitoring circuitry

Current sharing

T_A= –40°C...71°C

E

Active inrush current limitation for CK, DK, EK

P ¹

Adjustment range +10/–60% of U_{o nom}excludes R input

Safe data signal output (Versions D0...DD)

D ²

V ^{2 3}

T

ACFAIL signal according to VME specs (Versions V0, V2, V3)

Interconnect T-pins if paralleling outputs (5 units max.)

Replaces standard heat sink, allowing direct chassis-mounting

B1/B2

Cooling plate

¹Function R excludes option P and vice versa.

²Option D excludes Option V and vice versa ^.

³Only available if main output voltage U _o1= 5.1.

10017

-9 Extended Temperature Range

Option -9 extends the operational ambient temperature

range from –25...71°C (standard) to –40...71°C. The power

supplies provide full nominal output power with convection

cooling. Option -9 excludes inrush current limitation by

NTC.

Control

FET

E Inrush Current Limitation

R_S

C_i

R_I

CK/DK/EK types may be supplemented by an electronic

circuit (option E, replacing the standard built-in NTC) to

achieve an enhanced inrush current limiting function (not

available with AK/BK/FK types).

Fig. 25

Option E block diagram

If fitted with option E (inrush current limitation) together with

option D6, input voltage monitoring, the CK units meet the

CEPT/ETSI standards for 48 V DC supply voltages accord-

ing to prETS 300132-2, version 4.2, date 9312. Option D6,

externally adjustable via potentiometer, is necessary to dis-

able the converter at input voltages below actual service

voltage ranges, avoiding an excessive input current

when the input voltage is raised slowly according to

prETS 300132-2. Option D6 threshold level should be ad-

justed to 36.0...40.5 V for 48 V nominal supply systems or

44.0...50.0 V for 60 V nominal supply systems (refer also to

description of option D). The D output should be connected

to the inhibit input. Please contact Melcher if applications

do not permit potentiometer setting.

11039

CapacitorC_i

fully charged

Normal operation

(current limiting

circuit is fully

Î [A]

U_i/R_V

conducting)

I_i= P_i/U_i

t [ms]

0

<30

R_V: Current limiting resistance = R_S+ R_I= 15 Ω

Fig. 26

Inrush current with option E

Table 16: Inrush current characteristics with option E

Characteristics

CK

60

DK

110

7.4

EK

220

14.6

Unit

V

P Potentiometer

U_{i nom}, I_{o nom}Input voltage

The potentiometer provides an output voltage adjustment

range of +10/–60% of U_{o nom}and is accessible through a

hole in the front cover. This feature enables compensation

of voltage drops across the connector and wiring. Option P

is not recommended if units are connected in parallel.

I_{inr p}

Peak inrush

current

6.8

A

t_inr

Inrush current

duration

18

14

16

ms

U_{i max}, I_{o nom}Input voltage

140

9.3

220

380

V

A

Option P excludes the R-function. With double output units

both outputs are affected by the potentiometer setting (dou-

bling the voltage setting if the outputs are in series).

I_{inr p}

Peak inrush

current

14.5

25.3

t_inr

Inrush current

duration

20

14

12

ms

If the output voltages are increased above U_{o nom}via R-in-

put control, option P setting, remote sensing or option T, the

output current(s) should be reduced accordingly so that

P_{o nom}is not exceeded.

Precaution: Subsequent switch-on cycles at start-up

are limited to max. 10 cycles during the first 20 seconds

(cold unit) and at continuing on/off (T_C= 95°C) max. 1

cycle every 8 sec.

Edition 4/4.99

25/31

MELCHER

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

T Current Sharing

11003

This option ensures that the output currents are approxi-

mately shared between all paralleled modules hence in-

creasing system reliability. To use this facility, simply inter-

connect the T pins of all modules and make sure, that pins

14, the S– pins (K 1000) or the Vo1– pins (K 2000) are also

connected together. The load leads should have equal

length and cross section to ensure equal voltage drops. Not

more than 5 units should be connected in parallel. If output

voltage adjustment is requested we strongly recommend to

use the R-input instead of option P, as with option P the re-

quired setting accuracy is difficult to achieve. The output

voltages must be individually set prior to paralleling to

within a tolerance of 1...2% or the R pins should be con-

nected together.

Vo+

Load

Vo–

Vo+

Vo–

Vo+

Vo–

Fig. 27

An example of poor wiring for connection in parallel

Power bus

+

–

Vo+

Vo2+

Vi+

2

11036

1

S+

T

Vo2–

T

11037

1

Module

3

S–

Vo1+

Vo–

Vo1–

Vi–

Load

2

Vo+

Vo2+

Vi+

S+

T

Vo2–

T

1

Module

3

S–

Vo1+

Vo–

Vo1–

Vi–

max. 5 units in parallel connection

Fig. 29

Paralleling of double output units using option T with

Power Bus

max. 5 units in parallel connection

¹Leads should have equal length and cross sections and should

run in the same cable loom.

²Diodes recommended in redundant operation only

³DC common point

Fig. 28

Paralleling of single output units using option T with the

sense lines connected at the load

Edition 4/4.99

26/31

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

D Undervoltage monitor

The input and/or output undervoltage monitoring circuit op-

erates independently of the built-in input undervoltage lock-

out circuit. A logic "low" (JFET output) or "high" signal (NPN

output) is generated at pin 20 as soon as one of the moni-

tored voltages drops below the preselected threshold level

U_t. The return for this signal is Vo1–. The D output recovers

when the monitored voltage(s) exceed(s) U_t+ U_h. The

threshold levels U_tiand U_toare either adjustable by a

potentiometer, accessible through a hole in the front cover,

or factory adjusted to a fixed value specified by the cus-

tomer.

Option D exists in various versions D0...DD as shown in the

following table.

Table 17: Undervoltage monitor functions

Output type

Monitoring

Minimum adjustment range

of threshold level U_t

U_tiU_to

Typical hysteresis U_h[% of U_t]

for U_{t min}...U _{t max}

JFET

NPN

U _i

U_o1

U_hi

U_ho

2.5...0.6

-

D1

D2

D3

D4

D0

D5

D6

D7

D8

D9

no

yes

no

yes

no

-

3.5...40 V ¹

-

1

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

-

3.4...0.4

-

2

yes

no

(0.95...0.985 U_o1

3.5...40 V ³

-

)

"0"

no

-

2.5...0.6

-

3 4

1

yes

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

3.4...0.4

yes

3.5...40 V ³

(0.95...0.985 U_o1

3.5...40 V ¹

2.5...0.6

"0"

2

)

-

DD

2.5...0.6

¹Threshold level adjustable by potentiometer

²Fixed value tracking if U_o1is adjusted via R-input, option P or sense lines.

³The threshold level permanently adjusted according to customer specification ±2% at 25°C. Any value within the specified range is

basically possible but causes a special type designation in addition to the standard option designations (D0/D9 respectively)!

⁴Adjusted at I_{o nom}

JFET output (D0…D4):

11006

Connector pin D is internally connected via the drain-

source path of a JFET (self-conducting type) to the nega-

tive potential of output 1. U_D≤ 0.4 V (logic low) corresponds

to a monitored voltage level (U_iand/or U_o1) < U_t. The cur-

rent I_Dthrough the JFET should not exceed 2.5 mA. The

JFET is protected by a 0.5 W Zener diode of 8.2 V against

external overvoltages.

Vo1+

R

p

I

D

U

D

U_i, U_o1status

U_ior U_o1< U_t

D output, U_D

low, L, U_D≤ 0.4 V at I_D= 2.5 mA

high, H, I_D≤ 25 µA at U_D= 5.25 V

Vo1–

U_iand U_o1> U_t+ U_h

Fig. 30

Option D1...D0: JFET output, I_D£ 2.5 mA

11007

NPN output (D5...DD):

Vo1+

Connector pin D is internally connected via the collector-

emitter path of a NPN transistor to the negative potential of

output 1. U_D< 0.4 V (logic low) corresponds to a monitored

voltage level (U_iand/or U_o1) > U_t+U_h. The current I_D

through the open collector should not exceed 20 mA. The

NPN output is not protected against external overvoltages.

U_Dshould not exceed 40 V.

R

p

I

D

U

D

U_i, U_o1status

U_ior U_o1< U_t

D output, U_D

Vo1–

high, H, I_D≤ 25 µA at U_D= 40 V

low, L, U_D≤ 0.4 V at I_D= 20 mA

Fig. 31

Option D5...DD: NPN output, U_o1£ 40 V, I_D£ 20 mA

U_iand U_o1> U_t+ U_h

Table 18: D-output logic signals

Version of D

U_i< U_tresp. U_o< U_t

U_i> U_t+ U_hresp. U_o> U_t

Configuration

JFET

D1, D2, D3, D4, D0

D5, D6, D7, D8, D9, DD

low

high

low

high

NPN

Edition 4/4.99

27/31

MELCHER

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

11021

Threshold tolerances and hysteresis:

U_D

DU_ti

U_hi

If U_iis monitored, the internal input voltage after the input

filter is measured. Consequently this voltage differs from

the voltage at the connector pins by the voltage drop DU_ti

across the input filter. The threshold levels of the D0 and D9

options are factory adjusted at nominal output current I_{o nom}

and at T_A= 25°C. The value of DU_tidepends upon the input

voltage range (CK, DK, ..), threshold level U_t, temperature

and input current. The input current is a function of the input

voltage and the output power.

U_{D high}

P

U_{D low}

U_i

U_ti

Fig. 32

Definition of U_ti, ∆U_{t i}and ∆U_hi(JFET output)

D-signal with respect to input and output voltage versus time:

Input voltage monitoring

NPN

U_D

11008

U_{D high}

3

U_{D low}

0

t

I_D

I_{D high}

I_{D low}

0

JFET U_D

U_{D high}

U_{D low}

0

t

1

4

t_h

t_{low min}

t_{high min}

U_o1

U_{o1 nom}

1

t_h

1

0.95

0

U_i[V DC]

U_ti+U_hi

U_ti

t

0

Input voltage failure

Switch-on cycle

Input voltage sag

Switch-on cycle and subsequent

input voltage failure

Output voltage monitoring

NPN U_D

2

U_{D high}

3

U_{D low}

0

t

I_D

I_{D high}

I_{D low}

0

U_D

JFET

U_{D high}

U_{D low}

0

t

4

t_{low min}

U_o1

U_{o1 nom}

U_to+U_ho

U_to

¹Hold-up time see section Electrical Input Data

²With output voltage monitoring, hold-up time t_h= 0.

0

³The signal will remain high if the D output is connected to

an external source.

Output voltage failure

Fig. 33

⁴t_{low min}= 100...170 ms, typically 130 ms.

Relationship between U_i, U_o1, U_D, U_o1/U_{o nom}versus time

Edition 4/4.99

28/31

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

V ACFAIL signal (VME)

Formula for the external input capacitor:

Available for units with U_o1= 5.1 V.

This option defines an undervoltage monitoring circuit for

the input or input and main output voltage (U_{o1 nom}= 5.1 V

only) equivalent to option D and generates an ACFAIL sig-

nal (V signal) which conforms to the VME standard.

2 • P_o• (t_h+ 0.3 ms) • 100

C_{i ext}= –––––––––––––––––––––– – C_{i min}

2

h • (U_ti²– U_{i min}

)

where as:

C_{i min}= internal input capacitance [mF]

C_{i ext}= external input capacitance [mF]

The low state level of the ACFAIL signal is specified at a

sink current of I_V≤ 48 mA to U_V≤ 0.6 V (open-collector out-

put of a NPN transistor). The pull-up resistor feeding the

open-collector output should be placed on the VME back

plane.

P_o

h

= output power [W]

= efficiency [%]

= hold-up time [ms]

t_h

U_{i min}= minimum input voltage [V] ¹

U_ti= threshold level [V]

After the ACFAIL signal has gone low, the VME standard

requires a hold-up time t_hof at least 4 ms before the 5.1 V

output drops to 4.875 V when the output is fully loaded.

This hold-up time t_his provided by the internal input capaci-

tance. Consequently the working input voltage and the

threshold level U_tishould be adequately above the mini-

mum input voltage U_{i min}of the converter so that enough

energy is remaining in the input capacitance. If the input

voltage is below the required level, an external hold-up ca-

pacitor (C_{i ext}) should be added.

¹Min. input voltage according to Electrical Input Data. For output

voltages U_o> U_{o nom}, the minimum input voltage increases pro-

portionally to U_o/U_{o nom}

.

Remarks:

Option V2 and V3 can be adjusted by potentiometer to a

threshold level between U_{i min}and U_{i max}. A decoupling di-

ode should be connected in series with the input of AK...FK

converters to avoid the input capacitance discharging

through other loads connected to the same source voltage.

Formula for threshold level for desired value of t_h:

2 • P_o• (t_h+ 0.3 ms) • 100

2

U_ti= ––––––––––––––––––––– + U_{i min}

C_{i min}• h

Table 19: Available internal input capacitance and factory potentiometer setting of U_tiwith resulting hold-up time

Types

C_{i min}

U_{t i}

AK

0.83

9.5

BK

0.3

FK

1.2

39

CK

0.66

39

DK

0.26

61

EK

0.21

97

Unit

mF

19.5

0.1

V DC

ms

t_h

0.1

3.4

1.1

2.7

voltage(s) exceed(s) U_t+ U_h. The threshold level U_tiis ei-

ther adjustable by potentiometer, accessible through a hole

in the front cover, or adjusted during manufacture to a de-

termined customer specified value.

Option V operates independently of the built-in input under-

voltage lock-out circuit. A logic "low" signal is generated at

pin 20 as soon as one of the monitored voltages drops be-

low the preselected threshold level U_t. The return for this

signal is Vo1–. The V output recovers when the monitored

Versions V0, V2 and V3 are available as shown below.

Table 20: Undervoltage monitor functions

V output

(VME compatible)

Monitoring

Minimum adjustment range

of threshold level U_t

U_tiU_to

Typical hysteresis U_h[% of U_t]

for U_{t min}…U_{t max}

U_i

U_o1

no

U_hi

U_ho

–

1

–

V2

V3

V0

yes

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

3.4...0.4

1

2

yes

no

0.95...0.985 U_o1

–

"0"

–

3 4

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

3 4

yes

0.95...0.985 U_o1

"0"

¹Threshold level adjustable by potentiometer. ²Fixed value between 95% and 98.5% of U_o1(tracking). ³Adjusted at I_{o nom}

.

⁴Fixed value, resistor-adjusted (±2% at 25°C) acc. to customer's specifications; individual type number is determined by Melcher.

11009

V output (V0, V2, V3):

Vo1+

Connector pin V is internally connected to the open collec-

tor of a NPN transistor. The emitter is connected to the

negative potential of output 1. U_V≤ 0.6 V (logic low) corre-

sponds to a monitored voltage level (U_iand/or U_o1) <U_t.

The current I_Vthrough the open collector should not exceed

50 mA. The NPN output is not protected against external

overvoltages. U_Vshould not exceed 60 V.

R

p

I

V

U

V

U_i, U_o1status

V output, U_V

Vo1–

U_ior U_o1< U_t

low, L, U_V≤ 0.6 V at I_V= 50 mA

high, H, I_V≤ 25 µA at U_V= 5.1 V

Fig. 34

Output configuration of options V0, V2 and V3

U_iand U_o1> U_t+ U_h

Edition 4/4.99

29/31

MELCHER

The Power Partners.

K Series

DC-DC Converters >100Watt

Rugged Environment

11023

Threshold tolerances and hysteresis:

U_V

DU_ti

U_hi

If U_iis monitored, the internal input voltage is measured af-

ter the input filter. Consequently this voltage differs from the

voltage at the connector pins by the voltage drop DU_ti

across the input filter. The threshold level of option V0 is ad-

justed during manufacture at I_{o nom}and T_A= 25°C. The

value of DU_tidepends upon the input voltage range (AK,

BK, ...), threshold level U_t, temperature and input current.

The input current is a function of input voltage and output

power.

U_{V high}

P

U_{V low}

U_i

Fig. 35

U_ti

Definition of U_ti, ∆U_tiand U_hi

Input voltage monitoring

2

t_{low min}

V2

U_{V high}

U_V

3

11010

4

2

4

2

U_{V low}

0

t

t_{low min}

V3

U_{V high}

U_V

3

U_{V low}

0

1

t_h

U_o1

5.1 V

4.875 V

2.0 V

0

t

U_i[V DC]

U_ti+ U_hi

U_ti

t

0

Input voltage failure

Switch-on cycle

Input voltage sag

Switch-on cycle and subsequent

input voltage failure

Output voltage monitoring

V2 U_V

U_{V high}

¹VME request: minimum 4 ms

²t_{low min}= 40...200 ms, typically 80 ms

4

U_{V low}

³U_Vlevel not defined at U_o1< 2.0 V

t

⁴The V signal drops simultaneously with the output voltage. If the

pull-up resistor R_Pis connected to Vo1+. The V signal remains

high if R_Pis connected to an external source.

0

2

t_{low min}

V3 U_V

U_{V high}

3

4

U_{V low}

0

U_o1

5.1 V

4.875 V

2.0 V

0

t

U_i

U_ti+ U_hi

U_ti

t

0

Output voltage failure

Fig. 36

Relationship between U_i, U_o1, U_V, I_Vand U_o1/U_{o nom}ver-

sus time.

Edition 4/4.99

30/31

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100Watt

K Series

B1/B2 Cooling Plate (see: Mechanical Data)

Where a cooling surface is available, we recommend the

use of a cooling plate (option B1) instead of the standard

heatsink. The mounting system should ensure sufficient

cooling capacity to guarantee that the maximum case tem-

perature T_{C max}is not exceeded. The cooling capacity is cal-

culated by:

(100% – h)

P_Loss= –––––––––– (U_o• I_o)

h

Efficiency h see Type survey

Elongated case for 220 mm rack depth: Option B2

Accessories

A variety of electrical and mechanical accessories are

available including:

– Front panels for 19" rack mounting, Schroff and Intermas

systems.

– Mating H15/H15 S4 connectors with screw, solder, fast-

on or press-fit terminals.

– Connector retention facilities.

– Code key system for connector coding.

– Chassis mounting plates for mounting the 19" cassette to

a chassis/wall where only frontal access is given.

– Universal mounting bracket for DIN-rail or chassis moun-

ting.

For more detailed information please refer to: Accessory

Products.

Front panels

H15 female connector,

code key system

Mounting plate (option B1 essential),

connector retention clips

Universal mounting bracket for DIN-rail mounting.

Edition 4/4.99

31/31

MELCHER

The Power Partners.


型号：	EK1501-7ERD2B2
厂家：	BEL FUSE INC.
描述：	DC-DC Regulated Power Supply Module, 1 Output, 150W, Hybrid, METAL, CASE K02, MODULE 电源电路
文件：	总31页 (文件大小：1252K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

EK1501-7ERD2B2 [BEL]

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