EK1001-7ERD2_技术文档

K-Family

DC-DC Converters >100 W

Rugged Environment

150 W DC-DC (AC-DC) Converters

K-Family

Input to output isolation

Single output: AK...LK 1000

Double output: AK...LK 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 isolation test voltage

• Fully isolated outputs

• Outputs open- and short-circuit proof

• No derating over entire operating temperature range

Safety according to IEC 950

V

D E

C

Table of Contents

Page

Description .................................................................. 8 - 2

Type Survey ................................................................ 8 - 3

Safety and Installation Instructions ............................. 8 - 4

Functional Description................................................. 8 - 6

Electrical Input Data .................................................... 8 - 7

Electromagnetic Compatibility EMC............................ 8 - 9

Electrical Output Data ............................................... 8 - 11

Supplementary Data ................................................. 8 - 19

Description of Options............................................... 8 - 19

Immunity to Environmental Conditions...................... 8 - 26

Mechanical Data ....................................................... 8 - 27

Type Key and Product Marking ................................. 8 - 28

Description

The K-family of DC-DC (AC-DC) converters represents a

broad and flexible range of power supplies for use in ad-

vanced electronic systems. Features include high effi-

ciency, high reliability, low output voltage noise and excel-

lent dynamic response 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 950 and have been approved by the safety agencies

VDE (Germany) and UL (USA). The UL Mark for Canada

has been officially recognized be regulatory authorities in

provinces across Canada.

The converter inputs are protected against surges and tran-

sients occuring on the source lines. Input over- and

undervoltage lock-out circuitry disables the outputs if the

input voltage is outside the specified ranges. 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 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.

LED indicators display the status of the converter and allow

visual monitoring of the system at any time.

Various options are available to adapt the converters to in-

dividual applications.

The modules may either be plugged into 19 inch rack sys-

tems according to DIN 41494, or be chassis mounted.

Case: Aluminium, black finish, self cooling.

8 - 2

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

Type Survey

Survey of Options see "Description of Options"

Different output voltages and currents may be set in accordance with customer specifications.

Table 1a: Type survey AK

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}

8...35 V DC

η_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

D

V ⁶

P

12.0

15.0

24.0

5.0

T

B1

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, CK

Output 1

Output 2

Input Voltage Range and Efficiency¹

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

η_min

[%]

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

28...140 V DC

η_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

83

84

CK 1001-7R

CK 1301-7R

CK 1501-7R

CK 1601-7R

79

82

86

-9

E ³

D

12.0

15.0

24.0

V ⁶

P

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

CK 2320-7R

CK 2540-7R

CK 2660-7R

80

82

84

T

B1

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

CK 2320-7R

CK 2540-7R

CK 2660-7R

80

82

84

Table 1c: Type survey DK, FK, LK

Output 1

Output 2

Input Voltage Range and Efficiency¹

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

η_min

[%]

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

20...100 V DC

η_min

[%]

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

88...372 V DC

(85…264 V AC)

η_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

FK 1001-7R

FK 1301-7R

FK 1501-7R

FK 1601-7R

80

82

85

86

LK 1001-7R

LK 1301-7R

LK 1501-7R

LK 1601-7R

79

84

85

-9

E ³

D

V ⁶

P

12.0

15.0

24.0

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

83

85

FK 2320-7R

FK 2540-7R

FK 2660-7R

81

83

84

LK 2320-7R

LK 2540-7R

LK 2660-7R

81

83

84

T

B1

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

83

84

FK 2320-7R

FK 2540-7R

FK 2660-7R

81

83

84

LK 2320-7R

LK 2540-7R

LK 2660-7R

81

83

84

1

2

Efficiency at U_{i nom}and I_{o nom}

.

If 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.

Option E for C/D/E/LK types.

Series connection of output 1 and 2.

Second output semi-regulated.

3

4

5

6

Option V for A...LK 1001 types only.

Note: EK types with an input voltage range of 67...385 V DC are available upon request.

Edition 2/96 - © Melcher AG

8 - 3

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Safety and Installation Instructions

Safety:

The connector has a leading earth connection pin which

ensures earth connection prior to any other.

For safety reasons, the power supplies should be wired

via the female connector H15 or H15 S4 (according to

DIN 41612, see "Accessories") in order to meet national

and international safety requirements.

The UL 1950 recognition limits the ambient operational

temperature range of the standard modules (-7) to

–25...50°C. In applications where the full operational tem-

perature range of –25...71°C under UL condition is re-

quired, forced cooling should be provided. The European

approval boards have in contrast accepted the converters

to be operated up to T_{A max}without any further precautions.

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

sible according to the IEC 950 related safety standards, it

shall be an SELV circuit (Safety Extra Low Voltage circuit,

i.e. a circuit, separated from mains by at least basic insula-

tion, that is so designed and protected that under normal

and single fault conditions, the voltage between any two

conductors and between any conductor and earth does not

exceed 60 V DC).

Installation Instructions

Installation must strictly follow the national safety regula-

tions. Pin 24 has to be connected to earth. A second fuse

should be installed in the wiring to pins 26/28 if:

In the following section an interpretation is provided of the

IEC 950 safety standard with respect to the safety status of

the output circuit. However, it is the sole responsibility of

the installer or user to assure the compliance with the rel-

evant and applicable safety standards.

– Local requirements demand an individual fuse in each

source line

– Input to protective earth impedance is high or undefined

– Phase and neutral of the mains are not defined (AC-DC

converters).

If table below is observed, the output of a DC-DC converter

is considered to be an SELV circuit up to a nominal output

voltage of 36 V.

In applications where the inhibit function is not used, the

inhibit pin should be connected to the S– pin (K 1000) or

the Vo1– pin (K 2000) to enable the outputs.

The converters correspond to safety class I equipment and

comply with IEC 950, EN 60950, VDE 0805 Part 100 (in-

cluding manufacturing surveillance), UL 1950, CSA C22.2

No. 950-95 and are VDE approved.

Table 2: Insulation concept

Converter Nominal Minimum required grade of Maximum Minimum required safety Minimum required grade Resulting

type

mains

supply

isolation, to be provided by output

status of the front end

output circuit

of isolation between the safety

the AC-DC front end,

voltage

input and the output

provided by the

status

of the

voltage including mains supplied

(AC)

from the

front end

battery charger

the DC-DC converter

DC-DC

output

AK, BK

≤150V

Operational

≤100 V

≤400 V

Primary circuit

Double or reinforced,

based on

AC 150 V and DC 100 V

SELV

circuit

≤250V

Basic

Hazardous voltage

secondary circuit

(earthed or unearthed)

Double or reinforced,

based on

AC 250 V and DC 100 V

CK, DK,

EK, FK,

LK

Operational

Primary circuit

Reinforced, based on

AC 250 V and DC 400 V

Important Advice

Electric strength tests should not be repeated in the field. Improper test methods, for example overshooting or oscillating

test voltages, voltage slopes exceeding 1 kV/µs, internal Y-capacitors not carefully discharged, etc. can cause severe

damage to switching devices and ICs. Melcher AG will not honour any guarantee/warranty claims resulting from high

voltage field tests.

8 - 4

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

Table 3: H15 and H15 S4 connector pin allocation

No.

Connector type H15 S4

Connector type H 15

BK…LK 1301/1501/1601 BK…LK 2000

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

AK 2000

4

6

Vo1+

Vo1–

S+

Vo2+

Vo2–

Vo1+

Vo1–

R ¹

Vo1+

Vo1–

Output 1

Vo2+

Output 2

Output 1

Output 2

8

Vo2–

Output 2

10

12

14

16

18

20

S+

S–

R ¹

i

Sense

Vo1+

Vo1–

R¹

i

Output 1

Control of U_o1

Inhibit

Sense

Output 1

Control of U_o1

Inhibit

Sense

S–

Sense

Control of U_o1

Inhibit

R¹

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+ or N

Vi– or P

Vi+ or N

Vi– or P

Vi+ or N

Vi– or P

Input or Neutral

Vi+

Input or Neutral

Input or Phase

Vi–

Input or Phase

Vi– or P

2

3

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

30/32

4/6

32

4

Type H15 S4

Type H15

Fig. 1

View of module's male connectors

Degree of Protection

Condition: Female connector fitted to the unit.

IP 30: All units except those with options P, D or V with

potentiometer adjustment.

IP 20: All units fitted with options which include poten-

tiometer setting.

Edition 2/96 - © Melcher AG

8 - 5

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Functional Description

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

rectifier (LK types) and an inrush current limiter to the input

capacitor. This capacitor sources a single transistor forward

converter. Each output 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 volt-

age U_o1and generates, with respect to the maximum ad-

missible output currents, the control signal for the primary

switching transistor.

The second output of double output units is controlled by

the main output but has independent current limiting. If the

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

put voltage will fall as well and vice versa.

P

16

18

20

22

12

26

Y

28

2

3

1

4

Y

6

8

5

Y

10

4

30

32

14

Y

24

Fig. 2

–

+

Block diagram of single output converters AK…LK 1000

P

16

18

20

22

26

Y

28

3

2

1

Y

12

14

4

5

Y

4

6

30

32

24

8

Y

10

–

+

1

2

3

⁴Inrush current limiter in C/D/E/LK types (NTC or Opt. E),

-9 versions exclude the NTC

Transient suppressor (VDR) in C/D/E/F/LK types

Transient suppressor (diode) in A/B/C/FK types

Bridge rectifier in LK types

⁵Input fuse

Fig. 3

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

8 - 6

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

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 4a: Input data

Input

AK

BK

CK

DK

Characteristics

Conditions

min typ max min typ max min typ max min typ

max Unit

220 V DC

U_i

Input voltage range

I_o= 0…I_{o nom}

T_{C min}…T_{C max}

8

35

14

70

28

140 44

U_{i nom}Input voltage (nominal)

15

30

60

110

1.6

1

I_i

Input current

U_{i nom}, I_{o nom}

9.0

6.0

3.0

A

P_i0

P_{i inh}

R_i

No-load input power

Idle input power

Input resistance

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

1.5

65

100

150

800

170

mΩ

R_NTCNTC resistance ²

C_iInput capacitance

T_C= 25°C

–

1600

1000 260

3

830

1250 300

450 660

400 µF

U_{i RFI}Conducted input RFI

Radiated input RFI

EN 55022

A

B

>A

U_{i abs}Input voltage limits

(without damage)

0

40

0

80

0

154

0

400 ⁴V DC

A

F

Fuse rating (nominal)

see Input Fuse

30.0

25.0

12.5

8.0

Table 4b: Input data

Input

EK

FK

typ

–

LK

Characteristics

Conditions

min

typ

–

max

min

max

min

typ

max

Unit

V AC

V DC

U_i

Input voltage range

I_o= 0…I_{o nom}

T_{C min}…T_{C max}

85

88

264

372

67

385

20

100

U_{i nom}Input voltage (nominal)

220

0.8

48

310

0.6

1

I_i

Input current

U_{i nom}, I_{o nom}

3.75

A

P_i0

P_{i inh}

R_i

No-load input power

Idle input power

Input resistance

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

180

3200

210

70

480

3200

210

mΩ

µF

R_NTCNTC resistance ²

T_C= 25°C

–

3

C_iInput capacitance

400

1200

1800

110

400

U_{i RFI}Conducted input RFI

Radiated input RFI

EN 55022

B

U_{i abs}Input voltage limits

(without damage)

0

–400

V DC

A

F

Fuse rating (nominal)

see Input Fuse

4.0

16.0

4.0

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

.

²Valid for -7, -6, -5 versions with NTC, (-9 versions exclude the NTC). Initial switch-on cycle. Subsequent switch-on/off cycles increase

the inrush current peak value.

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

⁴1 s max., duty cycle 1% max.

Note: EK types with an input voltage range of 67...385 V DC are available upon request.

Remarks: LK types may be operated in AC mode within a frequency range of 47...440 Hz. Above 70 Hz (at U_i= 264 V AC)

the earth leakage current may exceed 3.5 mA as specified in IEC 950.The built-in Y capacitors are specified for frequen-

cies up to 100 Hz. Above 350 Hz the input voltage should not exceed 200 V AC, due to the built-in X capacitors.

Edition 2/96 - © Melcher AG

8 - 7

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Input Fuse

Inrush Current Peak Value

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!

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

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

rush Current Characteristic)

U_{i source}

I_{inr p}= ––––––––––––––––

(R_{s ext}+ R_i+ R_NTC

)

Table 5: Fuse Specification

R_{s ext}

I_{inr p}

R_i

R_NTC

Module

Fuse type

Fuse rating

AK ¹

BK ¹

CK ²

DK ²

EK ²

FK²

LK ²

fast-blow

slow-blow

Little fuse 314 30.0 A, 125 V

Little fuse 314 25.0 A, 125 V

+

C_{i int}

U_{i source}

SPT

12.5 A, 250 V

8 A, 250 V

4 A, 250 V

16 A, 250 V

4 A, 250 V

Fig. 4

Equivalent circuit for input impedance

1

Fuse size 6.3 × 32 mm

²Fuse size 5 × 20 mm

Input Transient Protection

Input Inrush Current Characteristic

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.

I_{i inr}[A]

150

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 to 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 not practically be absorbed an ex-

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

110V batteries has been designed to meet this requirement

and is available upon customer request.

100

CK

EK, LK

DK

Input Under-/Overvoltage Cut-out

50

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!

0

Inrush Current Limitation

The C/D/E/LK modules of the versions -7, -6, -5 incorpo-

rate a 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 connectors 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 option E.

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 section "Inrush Current Peak

Value" to get realistic results.

8 - 8

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

Static Input Current Characteristic

Hold-up Time versus relative Input Voltage

t_h(ms)

I_i(A)

LK

EK

100.00

10.00

CK/FK

DK

AK

10.00

1.00

BK

FK

CK

AK

BK

1.00

DK

EK

LK

U_i

____

0.10

U_{i min}

1

2

3

4

5

6

U_i

Fig. 7

____

0.10

U_{i min}

Typical hold-up time t_hversus relative input voltage U_i/U_i

_min. With the exception of the LK, the DC-DC converters

require an external series diode in the input path when

other loads are connected to the same input supply lines.

1

2

3

4

5

6

Fig. 6

Typical input current versus relative input voltage

Electromagnetic Compatibility EMC

Emission

Conducted RFI Noise at Input according to EN 55022

Radiated RFI Noise according to EN 55022

dB (µV)

90

80

70

60

50

EN 55022 A

EN 55022 B

60

A

40

B

40

30

20

10

0

0.03

0.1

0.5

1 GHz

0.01

0.1

1.0

10.0 30.0 MHz

0.2

Fig. 8

Typical radio frequency-interference voltage at U_{i nom}

_{o nom}, measured with an artificial mains network and a

Fig. 9

,

Typical radio frequency-interference voltage at U_{i nom}

,

I

I_{o nom}, measured with an antenna (distance 10 m).

quasi peak detector.

Edition 2/96 - © Melcher AG

8 - 9

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Immunity

Table 6: Immunity type tests

1

Voltage surge

IEC 571-1 ³

(1990-07)

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. yes

voltage surge per

coupling mode

5 µs

1 µs

100 ns

20 ms

1

Supply related

surge

RIA 12

(1984)

A ⁵

B

C

D

E

F

+i/–i

0.2 Ω

5 Ω

1 positive

surge

yes

1 s

2

Direct transient

+i/c, –i/c

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

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

6

Indirect coupled

transient

+o/c, –o/c

K

L

1

Electrostatic

discharge

IEC 801-2

(1991-04)

4

contact discharge 8000 V_p

to case,

330 Ω

10 positive and

10 negative

discharges

yes

air disch. to case 15000 V_p

Electric field

IEC 801-3

(1984)

3

antenna in

1 m distance

10 V/m AM modulated

80% 1 kHz

26…1000 MHz

ENV 50204

unmodulated

50% duty cycle

900 ± 5 MHz

1

Fast transient/

burst

IEC 801-4

(1988)

i/c, +i/–i

2000 V_pbursts of 5/50 ns

5 kHz rep. rate

50 Ω

1 min positive

1 min negative

bursts per

yes

transients with

15 ms burst

coupling mode

duration and a

4

3

4

4000 V_p300 ms period

1

Transient

IEC 801-5

(Draft 1993-01)

i/c

2000 V_p

1.2/50 µs

12 Ω

2 Ω

5 pos. and 5 neg. yes

impulses per

coupling mode

+i/–i

Conducted

disturbance

IEC 801-6

(Draft1992-12)

3

i, o, signal wires 140 dBµV AM modulated 150 Ω

(10 V_rms80%, 1 kHz

0.15...80 MHz

yes

)

1

2

3

4

5

Normal operation, no deviation from specifications.

Normal operation, temporary deviation from specifications possible.

Will be replaced by EN 50155.

i = input, o = output, c = case

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

tomer's request. Standard DK units (110 V battery) will not be damaged, but overvoltage lock-out will occur during the surge.

Under normal operation temporary deviation from specifications possible.

6

Test in progress, please consult factory.

8 - 10

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

Electrical Output Data

General Conditions, valid for all tables Output data.

– 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 7a: 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

U_{i nom}, I_{o nom}

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

U_o

Output voltage

5.07

5.13 11.93

12.07 14.91

15.09 23.86

24.14

V

U_oL

Overvoltage protection Failure in

control circuit

7.6

21

26.5

43.5

I_{o nom}Output current ¹AK/BK

20.0/25.0

21/26

10.0/12.0

10.2/12.2

8.0/10.0

8.2/10.2

5.0/6.0

A

I_oL

Output current AK/BK U_{i min}…U_{i max}

limit⁴

5.2/6.2

T_{C min}…T_{C max}

u_o

Output voltage noise

U_{i nom}, I_{o nom}

10

5

mV

rms

BW = 20 MHz

100

75

60

90

mV_pp

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

±15

±25

±30

±30 mV

U_{i nom}, I_o=

20

25

30

40

(0.1…1)I_{o nom}

5

u_{o d}

Dynamic load regulation U_{i nom}

,

±100

±90

±100

±90

I_o=

5

t _d

Recovery time of

dynamic load regulation

0.3

0.4

ms

(1…¹/

…1)I_{o nom}

2

α

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

of output voltage ⁶

–1

mV/K

Uo

Table 7b: Output data double output modules AK/BK

Output

AK/BK 2320

AK/BK 2540

AK/BK 2660

(Outputs connected in Series)

24 V (2 × 12 V)

30 V (2 × 15 V)

48 V (2 × 24 V)

Characteristics

Conditions

U_{i nom}, I_{o nom}

min

typ

24.0 ²

39

max

min

typ

30.0 ²

49

max

min

typ

48.0 ²

72

max

Unit

V

U_o

Output voltage

U_oL

Overvoltage protection Failure in

control circuit

I_{o nom}Output current ¹AK/BK

5.0/6.0

4.0/5.0

2.5/3.0

A

I_oL

Output current AK/BK U_{i min}…U_{i max}

5.2/6.2

4.2/5.2

2.7/3.2

limit ⁴

T_{C min}…T_{C max}

u_o

Output voltage noise ³

U_{i nom}, I_{o nom}

BW = 20 MHz

10

60

10

60

5

mV

rms

80

mV_pp

mV

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

±15

±20

U_{i nom}, I_o=

25

35

(0.1…1)I_{o nom}

5

u_{o d}

Dynamicload regulation U_{i nom}

,

±180

±160

±100

I_o=

5

t _d

Recovery time of

dynamic load regulation

0.3

0.2

ms

(1…¹/

…1)I_{o nom}

2

α

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

of output voltage ⁶

–2

mV/K

Uo

¹If the output voltages are increased above U_{o nom}through R-in-

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

put current should be reduced accordingly so that P_{o nom}is not

exceeded.

³Shortest possible wiring for series connection at the connector.

⁴See fig. Output voltage regulation of single output units.

⁵See fig. Dynamic load regulation of U_o1and U_o2.

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

on request

²Series connection for U_{o nom}= 24 V, 30 V or 48 V, see fig. 17a.

Edition 2/96 - © Melcher AG

8 - 11

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Table 7c: Output data double output modules AK/BK

Output

AK/BK 2320

12 V/12 V

AK/BK 2540

15 V/15 V

(Outputs in Symmetrical Configuration)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_oL

Overvoltage protection Failure in

21

26.5

control circuit

I_{o nom}Output current ³AK/BK

5.0/6.0

5.2/6.2

5.0/6.0

5.2/6.2

4.0/5.0

4.2/5.2

I_oL

Output current AK/BK U_{i min}...U_{i max}

limit⁴

4.2/5.2

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

u_o

Output voltage noise

U_{i nom}, I_{o nom}

BW = 20 MHz

10

20

10

20

10

25

10

25

mV

rms

mV_pp

mV

∆U_o

Static line regulation

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

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

I_{o nom}

±30

8

Static load regulation

U_{i nom}, I_o=

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

50

5

6

u_{o d}

Dynamicload regulation U_{i nom}

,

±80

mV

ms

I_o=

(1...¹/

7

t _d

Recovery time of

dynamic load regulation

0.2

2

...1)I_{o nom}

α

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

of output voltage ⁷

–1

mV/K

Uo

Table 7d: Output data double output modules AK/BK

Output

AK/BK 2660

24 V/24 V

(Outputs in Symmetrical Configuration) ¹

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_oL

Overvoltage protection Failure in

36

control circuit

I_{o nom}Output current ³AK/BK

2.5/3.0

I_oL

Output current AK/BK U_{i min}…U_{i max}

2.7/3.2

limit⁴

T_{C min}…T_{C max}

u_o

Output voltage noise

U_{i nom}, I_{o nom}

5

mV

rms

BW = 20 MHz

30

mV_pp

mV

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

±40

8

U_{i nom}, I_o=

(0.1…1)I_{o nom}

70

5

6

u_{o d}

Dynamic load regulation U_{i nom}

,

±50

mV

ms

I_o=

6

t _d

Recovery time of

0.2

(1…¹/

…1)I_{o nom}

2

dynamic load regulation

α

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

of output voltage ⁷

–1

mV/K

Uo

⁴See fig. Output voltage regulation of single output units.

¹Depending upon the desired output configuration the wiring

should be made as shown in fig. 17b, c, d or e.

⁵Condition for specified output. Other output loaded with con-

stant current I_o= I_{o nom}

²Same conditions for both outputs.

³If 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 ex-

ceeded.

⁶See fig. Dynamic load regulation of U_o1and U_o2.

⁷Negative temperature coefficient (0…3 mV/cell and K) available

on request.

⁸See Output Voltage Regulation of Double Output Modules with

Output 1 and 2 in Symmetrical Configuration.

8 - 12

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

Table 8a: Output data single output modules CK...LK

Output

CK...LK 1001

5.1 V

CK...LK 1301

12.0 V

CK...LK 1501

15.0 V

CK...LK 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_oL

Overvoltage protection Failure in

control circuit

7.6

20

26.5

10.0

39

I_{o nom}Output current ¹

25.0

12.0

6.0

A

I_oL

Output current limit ⁴

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

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

12.2

10.2

6.2

u_o

Output voltage noise

U_{i nom}, I_{o nom}

10

5

mV

rms

BW = 20 MHz

100

75

60

90

mV_pp

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

,

±15

±25

±30

±30 mV

U_{i nom}, I_o=

20

25

30

40

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

5

u_{o d}

Dynamic loadregulation U_{i nom}

,

±100

±80

I_o=

(1...¹/

5

t _d

Recovery time of

dynamic load regulation

0.3

0.5

0.4

0.3

ms

2

...1) I_{o nom}

α

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

of output voltage ⁶

–1

mV/K

Uo

Table 8b: Output data double output modules CK...LK

Output

CK...LK 2320

24 V (2 × 12 V)

CK...LK 2540

30 V (2 × 15 V)

CK...LK 2660

48 V (2 × 24 V)

(Outputs connected in Series)

Characteristics

Conditions

U_{i nom}, I_{o nom}

min

typ

24.0 ²

39

max

min

typ

30.0 ²

48

max

min

typ

48.0 ²

74

max

Unit

V

U_o

Output voltage

U_oL

Overvoltage protection Failure in

control circuit

I_{o nom}Output current ¹

6.0

5.0

3.0

A

I_oL

Output current limit ⁴

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

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

6.2

5.2

3.2

u_o

Output voltage noise³

U_{i nom}, I_{o nom}

15

20

mV

rms

BW = 20 MHz

200

±40

250

±30

250

±50

mV_pp

mV

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

U_{i nom}, I_o=

40

30

40

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

5

u_{o d}

Dynamic load regulation U_{i nom}

,

±180

±160

±90

I_o=

(1...¹/

5

t _d

Recovery time of

dynamic load regulation

0.3

0.2

ms

2...1)I_{o nom}

α

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

of output voltage ⁶

–2.2

–2.6

mV/K

Uo

¹If the output voltages are increased above U_{o nom}through R-in-

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

output currents should be reduced accordingly so that P_{o nom}is

not exceeded.

³Shortest possible wiring for series connection at the connector.

⁴See fig. Output voltage regulation of single output units.

⁵See fig. Dynamic load regulation of U_o1and U_o2.

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

on request.

²Series connection for U_{o nom}= 24 V, 30 V or 48 V, see fig. 17a.

Edition 2/96 - © Melcher AG

8 - 13

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Table 8c: Output data double output modules CK...LK

Output

CK...LK 2320

12 V/12 V

CK...LK 2540

15 V/15 V

(Outputs in Symmetrical Configuration) 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

6.2

12.07 11.82

12.18 14.91

15.09 14.78

15.22

V

A

U_oL

Overvoltage protection Failure in

19

24

control circuit

I_{o nom}Output current ³

6.0

5.0

I_oL

Output current limit ⁴

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

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

6.2

5.2

u_o

Output voltage noise

U_{i nom}, I_{o nom}

BW = 20 MHz

10

50

10

50

mV

rms

150

200

mV_pp

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

±30

±40

±30

±40 mV

8

U_{i nom}, I_o=

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

100

5

6

u_{o d}

Dynamic load regulation U_{i nom}

±80

mV

ms

I_o=

6

t _d

Recovery time of

0.2

(1...¹/

...1) I_{o nom}

2

dynamic load regulation

α

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

of output voltage ⁷

–1.1

mV/K

Uo

Table 8d: Output data double output modules CK...LK

Output

CK...LK 2660

24 V/24 V

(Outputs in Symmetrical Configuration) ¹

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

3.2

24.14 23.64

24.36

V

A

U_oL

Overvoltage protection Failure in

37

control circuit

I_{o nom}Output current ³

3.0

I_oL

Output current limit ⁴

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

,

3.2

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

u_o

Output voltage noise

U_{i nom}, I_{o nom}

BW = 20 MHz

,

10

50

mV

rms

200

mV_pp

mV

∆U_o

Static line regulation

Static load regulation

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

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

I_{o nom}

,

±30

±50

,

8

U_{i nom}, I_o=

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

50

5

6

u_{o d}

Dynamic load regulation U_{i nom}

,

±50

mV

ms

I_o=

(1...¹/

6

t _d

Recovery time of

dynamic load regulation

0.2

2

...1) I_{o nom}

α

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

of output voltage ⁷

–1.3

mV/K

Uo

¹Depending upon the desired output configuration the wiring

should be made as shown in fig. 17b, c, d or e.

²Same conditions for both outputs.

³If 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 ex-

ceeded.

⁴See fig. Output voltage regulation of single output units.

⁵Condition for specified output. Other output loaded with con-

stant current I_o= I_{o nom}

.

⁶See fig. Dynamic load regulation of U_o1and U_o2.

.

⁷Negative temperature coefficient (0...3 mV/cell and K) available

on request.

⁸See Output Voltage Regulation of Double Output Modules with

Output 1 and 2 in Symmetrical Configuration.

8 - 14

Edition 2/96 - © Melcher AG

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The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

Output Protection

Test Sockets (Main output only ¹)

Each output is protected against overvoltage which could

occur due to a failure of the control circuit by means of a

voltage suppressor diode which, under worst case condi-

tions, may become a short circuit. The suppressor diode

are not designed to withstand externally applied over-

voltages. Overload at any of the two outputs will cause a

shut-down of both outputs. A red LED indicates the over-

load condition.

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 approximately 30 mV lower than the value measured at

the output terminals.

¹In case of double output units externally connected in series for

U_o= 24 V, 30 V or 48 V the monitored output voltage is 12 V,

15 V or 24 V respectively.

Inhibit Function

Output

U_{o nom}

The outputs of a module may be enabled or disabled by

means of a logic signal (TTL, CMOS etc.) applied to the in-

hibit input. If the inhibit function is not required, connect the

inhibit pin 18 to pin 14 to enable the outputs (active low

logic, fail safe).

0.1

0

t

t_f

t_r

Table 9: Inhibit characteristics

Inhibit

1

Characteristic

Conditions

min typ max Unit

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

voltage

0.8

50

V

t

0

U_o= off

2.4

Fig. 10

I_inhInhibit current

U_inh= 0

–400 µA

Typical output response as a function of inhibit control

t_r

t_f

Rise time

Fall time

30

depending on I_o

ms

Sense Lines

Table 10: Voltage compensation allowed using sense

lines

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

This feature enables compensation for voltage drops

across the connector contacts and if necessary, across the

load lines. If the sense lines are connected at the load

rather than directly at the connector, the user should ensure

that U_{o max}(between Vo1+ and Vo1–) is not exceeded. We

recommend connecting the sense lines directly at the fe-

male connector.

Output

voltage

Total voltage difference Voltage difference

between sense lines and

their respective outputs

between

Vo– and S–

5.1 V

< 0.5 V

< 1.0 V

< 0.25 V

12 V, 15 V

For further information, please refer to "Application Notes ".

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.

To ensure correct operation, both sense lines should be

connected to their respective power outputs and the volt-

age difference between any sense line and its respective

power output pin (as measured on the connector) should

not exceed the following values:

Parallel or Series Connection of Units

Note:

Single or double output units with equal nominal output volt-

age can be connected in parallel without any precautions

using option T.

– Parallel connection of double output units should always

include both, main and second output to maintain good

regulation of both outputs.

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

approximately equally.

– Series connection of second outputs without involving

their main outputs should be avoided as regulation may

be poor.

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

ble output units can be connected in series with any other

(similar) output.

– The maximum output current is limited by the output with

the lowest current limitation if several outputs are con-

nected in series.

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

Edition 2/96 - © Melcher AG

8 - 15

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Output Voltage Regulation of Single or Double Output

Modules with Outputs 1 and 2 Connected in Series

[V] U_o2

15.75

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

15.50

15.25

15.00

14.75

14.50

14.25

14.00

U_o

U_{o nom}

0.98

0.5

AK…LK

I_o1

I_oL

I_o2

0

1

2

3

4

5

6

7

[A]

I_{o nom}

I_o

I_{o nom}

Fig. 13

0

0.5

1.0

AK...LK 2540: ∆ U_o2(typ.) vs. I_o2with different I₀₁

Fig.11

_o1vs. I_o1(typ.) of single output units

U

[V] U_o2

26.0

Output Voltage Regulation of Double Output Modules

with Output 1 and 2 in Symmetrical Configuration

I_o1= 3.0 A

I_o1= 2.0 A

25.5

25.0

24.5

24.0

23.5

23.0

I_o1= 1.0 A

I_o1= 0.5 A

I_o1= 0.3 A

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

independent of the output currents.

,

U_o2is dependent upon the load distribution. When both out-

puts 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.

I_o2

[A]

0

0.5

1

1.5

2

2.5

3

3.5

4

I_{o nom}

Fig. 14

[V] U_o2

AK...LK 2660: ∆ U_o2(typ.) vs. I_o2with different I₀₁

12.6

I_o1= 6.0 A

I_o1= 4.5 A

I_o1= 3.0 A

U_o1

12.4

U_o1d

U_r

I_o1= 1.5 A

12.2

12.0

11.8

11.6

11.4

11.2

I_o1= 0.6 A

U_o1d

t_d

t

U_o2

U_o2d

I_o1/I_{o1 nom}

I_o2

[A]

1

I_o2/I_{o2 nom}

0

1

2

3

4

5

6

7

8

I_{o nom}

0.5

Fig. 12

<10 µs

AK...LK 2320: ∆ U_o2(typ.) vs. I_o2with different I₀₁

t

0

Fig. 15

Typical dynamic load regulation of U_o1and U_o2

8 - 16

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

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}

.

a)Adjustment by means of an external control voltage U_ext

between pin 16 (R) and pin 14:

– 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.

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

output voltage adjustment in the range of approximately

– For correct output voltage adjustment of double output

units the external wiring of the outputs should be accord-

ing to fig. 17a, b, c, d or e depending upon the desired

output configuration.

0...110% U_{o nom}

.

U

U_{o nom}

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

b) Adjustment by means of an external resistor:

– In case of parallel connection the output voltages should

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

Depending upon the value of the required output voltage

the resistor shall be connected

Vo1+

R

Vi+/N

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

Module

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–/P

Vi+/N

100...110% U_{o nom}

.

Warning:

Vo1+

– U_extshall never exceed 2.75 V DC.

S+

R

12

– 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!

R'_ext

R_ext

Module

16

14

S–

Vo1–

Vi–/P

Remarks:

Fig. 16

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

justment by potentiometer).

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

by means of the R input

Table 11a: R_extfor U_o< U_{o nom}; approximate 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 11b: R’_extfor U_o> U_{o nom}; approximate 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

32.0

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

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

422

383

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

Edition 2/96 - © Melcher AG

8 - 17

MELCHER

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K-Family

DC-DC Converters >100 W

Rugged Environment

Programmable Output Voltage (R-Function) continued

+

Vo2+

+

4

Vo2+

Vo2–

Vo1+

Vo1–

4

6

Vo2+

Vo2–

Vo1+

Vo1–

6

8

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

AK...LK 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.

Fig. 17b

AK...LK 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.

+24/+30/+48 V

0 V

Vo2+

Vo2–

Vo1+

Vo1–

4

6

+

Vo2+

Vo2–

Vo1+

Vo1–

4

6

1

U_o2

–12/–15/–24 V

+12/+15/+24 V

8

–

+

U_o2

8

+12/+15/+24 V

0 V

U_o1

10

12

10

12

2

1

U_o1

14

16

14

16

R_extR'_ext

R

Fig. 17c

Fig. 17d

AK...LK 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...LK 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.

1

A ceramic multilayer capacitor connected across the output

+

Vo2+

Vo2–

Vo1+

Vo1–

4

6

lines reduces ripple and spikes.

Shortest possible wiring for series connection at the female con-

nector

2

12 V

15 V

24 V

1

U_o2

–

+

8

10

12

12 V

15 V

24 V

U_o1

–

14

16

R_extR'_ext

R

Remarks:

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.

Fig. 17e

AK...LK 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.

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.

Please note: U_o2varies depending upon its own load and

the load on output 1.

8 - 18

Edition 2/96 - © Melcher AG

MELCHER

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Rugged Environment

DC-DC Converters >100 W

K-Family

Supplementary Data

Important Advice

Isolation

Testing by applying AC voltages will result in high and

dangerous leakage currents through the Y-capacitors

(see Functional Description, block diagrams). Melcher

will not honour any guarantee claims resulting from high

voltage field tests.

Input to output electric strength tests in accordance with

IEC 950, EN 60950, VDE 0805 and EN 41003 respectively

are performed as factory tests and should not be repeated

in the field.

Table 12: Electric strength test voltages, clearance and creepage distances

Characteristic

Input to Output

Input to Case

Output to Case

Output to Output

Unit

kV_rms

kV DC

Electric strength test voltage

4.0

5.6

2.0

2.8

1.0

1.4

0.1

0.15

Clearance and

creepage distance

on the print lay-out

AK/BK

6.4

3.2

2.0

0.8

mm

CK...LK

Display Status of LEDs

U_o> 0.95...0.985U_{o 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_o> 0.95...0.985U_{o adj}

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

U_o< 0.95...0.985U_{o adj}

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

OK

I_{o L}

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

I_o

I_{o nom}

I_oL

LED "i"versus case temperature

i

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

T_C

T_{C max}

U_{inh threshold}

T_{PTC 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

Description of Options

Table 13: Survey of options

Option

-9

Function of Option

Characteristics

Operational temperature range T_A= –40°C...71°C

Electronic inrush current limitation circuitry

Potentiometer for U_oadjustment

Extended operational temperature range

E ¹

P

Improved inrush current limitation as per table 12

R-function is not available if option P is incorporated

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

D

Input and/or output undervoltage monitoring circuitry

Input (and output) undervoltage monitoring circuitry

Current sharing

V ²

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

Cooling plate

1

Option E for C/D/E/LK types

²Option V for AK...LK 1001 types

Option -9 Extended Temperature Range

Extension of the operating temperature range from standard –25...71°C to –40...71°C.The modules will provide full nomi-

nal output power with free air convection cooling. Option -9 excludes inrush current limitation by NTC.

8 - 19

MELCHER

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Option E Inrush Current Limitation

CK/DK/EK/LK types may be supplemented by an elec-

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

to achieve an enhanced inrush current limiting function (not

available with AK/BK/FK types).

Control

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.

FET

Rectifier

(LK types)

R_S

C_i

R_I

Fig. 19

Option E block diagram

CapacitorC_i

fully charged

Normal operation

(current limiting

circuit is fully

Î [A]

U_i/R_V

conducting)

Table 14: Inrush current characteristics with option E

Characteristics

CK

60

DK

110

7.4

EK/LK Unit

I_i= P_i/U_i

t [ms]

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

220

V

A

I_{inr p}

Peak inrush

current

6.8

14.6

0

t_inr

Inrush current

duration

18

14

16

ms

0

<30

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

140

9.3

220

380

V

A

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

I_{inr p}

Peak inrush

current

14.5

25.3

Fig. 20

t_inr

Inrush current

duration

20

14

12

ms

Inrush current with option E

Precaution:

Subsequent switch-on cycles at start-up are limited to max. 10 cycles during the first 20 seconds (cold unit) and at con-

tinuing on/off (T_C= 95°C) max. 1 cycle every 8 sec.

Option P Potentiometer

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

for voltage drops across the connector and wiring. Option P

is not recommended if units are connected in parallel.

both outputs are affected by the potentiometer setting (dou-

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

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

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

output current(s) should be reduced accordingly so that

P_{o nom}is not exceeded.

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

Option T Current Sharing

This option ensures that the output currents are approxi-

mately shared between all paralleled modules and in-

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

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

no. 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. 21

An example of poor wiring for connection in parallel

8 - 20

MELCHER

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Vo+

Vi+/N

2

1

Power bus

+

–

S+

T

Vo1+

Vi+/N

1

Module

Vo2+

T

3

S–

Module

Vo–

Vi–/P

Vi+/N

Vo1–

Vo2–

Vi–/P

Vi+/N

Load

2

Vo+

Load

S+

T

Vo1+

1

Module

Vo2+

T

3

S–

Module

Vo–

Vi–/P

Vo1–

Vo2–

Vi–/P

max. 5 units in parallel connection

1

Leads should have equal length and cross sections and should

run in the same cable loom.

Diodes recommended in redundant operation only

DC common point

2

3

Fig. 23

Paralleling of double output units using option T

Fig. 22

Paralleling of single output units using option T with the

sense lines connected at the load

Option 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 15: 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

-

yes

no

(0.95...0.985 U_o1) ²

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 V³

(0.95...0.985 U_o1) ²

3.5...40 V¹

2.5...0.6

"0"

-

DD

2.5...0.6

1

2

3

Threshold level adjustable by potentiometer

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

The 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)!

Adjusted at I_{o nom}

4

8 - 21

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JFET output (D0…D4):

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.

Vi+

Vo1+

R

p

I

D

U

≤ 6 V

D

U_i, U_o1status

U_ior U_o1< U_t

D output, U_D

Vi–

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. 24

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

NPN output (D5...DD):

Vi+

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

Vi–

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. 25

U_iand U_o1> U_t+ U_h

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

Threshold tolerances and hysteresis:

If U_iis monitored, the internal input voltage after the input

filter and rectifier (LK types) is measured. Consequently

this voltage differs from the voltage at the connector pins by

the voltage drop ∆U_tiacross input filter and rectifier. The

threshold levels of the D0 and D9 options are factory ad-

justed at nominal output current I_{o nom}and at T_A= 25°C.The

value of ∆U_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

∆U_ti

U_hi

U_{D high}

P

U_{D low}

U_i

U_ti

Fig. 26

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

Table 16: 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

8 - 22

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

Input voltage monitoring

NPN

U_D

U_{D high}

3

U_{D low}

0

t

I_D

I_{D high}

I_{D low}

0

t

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

t

0

U_i[V DC]

U_ti+U_hi

U_ti

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}

U_{D low}

0

t

I_D

I_{D high}

I_{D low}

0

U_D

JFET

U_{D high}

¹Hold-up time see section Electrical Input Data

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

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

an external source.

U_{D low}

0

t

4

t_{low min}

U_o1

U_{o1 nom}

U_to+U_ho

U_to

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

0

Output voltage failure

Fig. 27

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

8 - 23

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Option V ACFAIL signal (VME)

Formula for the external input capacitor:

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

η • (U_ti²– U_{i min}

)

where as:

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.

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

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

P_o

η

= output power [W]

= efficiency [%]

t_h

= hold-up time [ms]

U_{i min}= minimum input voltage [V]¹

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.

U_ti

= threshold level [V]

¹Min. input voltage according to "Electrical Input Data". For out-

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

proportionally 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}• η

Table 17: 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

LK

0.21

120

4.2

Unit

mF

19.5

0.1

V DC

ms

t_h

0.1

3.4

1.1

2.7

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

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.

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

Table 18: 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

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.

V output (V0, V2, V3):

Vi+

Vo1+

V

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

Vi–

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. 28

Output configuration of options V0, V2 and V3

U_iand U_o1> U_t+ U_h

8 - 24

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

U_V

∆U_ti

U_hi

Threshold tolerances and hysteresis:

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

ter the input filter and rectifier (LK types). Consequently this

voltage differs from the voltage at the connector pins by the

voltage drop ∆U_tiacross input filter and rectifier. The

threshold level of option V0 is adjusted during manufacture

at I_{o nom}and T_A= 25°C.The value of ∆U_tidepends upon the

input voltage range (AK, BK, ...), threshold level U_t, tem-

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

input voltage and output power.

U_{V high}

P

U_{V low}

U_i

U_ti

Fig. 29

Definition of U_ti, ∆U_tiand U_hi

Input voltage monitoring

2

t_{low min}

V2

U_V

3

U_{V high}

4

2

4

2

U_{V low}

0

t

t_{low min}

V3

U_V

3

U_{V high}

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

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

U_i

U_ti+ U_hi

U_ti

Fig. 30

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

sus time.

0

Output voltage failure

Option B1 Cooling Plate (see "Mechanical Data")

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

culated by:

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-

(100% – η)

P_Loss= –––––––––– (U_o• I_o)

η

Efficiency η see Type survey

8 - 25

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Immunity to Environmental Conditions

Table 19: Mechanical stress

Test

Standard

Test Parameters

Status

Ca Damp heat

steady state

DIN 40046, part 5

IEC 68-2-3

Temperature:

Relative humidity:

40 ^±2°C

Unit not

operating

93 ^+2/-3

%

MIL-STD 810D section 507.2 Time:

DIN 40046, part 7 Acceleration amplitude:

Bump duration:

MIL-STD 810D section 516.3 Number of bumps:

56 days

Ea Shock

100 g_n= 981 m/s²

6 ms

18 (3 each direction, 3 axes)

Unit

operating

(half-sinusoidal) IEC 68-2-27

Eb Continuous shock DIN 40046, part 26

(half-sinusoidal) IEC 68-2-29

Acceleration amplitude:

Bump duration:

40 g _n= 392 m/s²

6 ms

Unit

operating

MIL-STD 810D section 516.3 Number of bumps:

6000 (1000 each direction, 3 axes)

Fc

Vibration

(sinusoidal)

DIN 40046, part 8

IEC 68-2-6

MIL-STD 810D section 514.3 Acceleration amplitude:

Test duration:

Frequency (1 Oct/min):

Maximum vibration amplitude:0.35 mm (10...60 Hz)

10...2000 Hz

Unit

operating

5 g _n= 49 m/s²

7.5 h (2.5 h each axis)

Fda Random vibration IEC 68-2-34

Frequency band:

20...500 Hz

Unit not

wide band

reproducibility

high

DIN 40046, part 22

Total acceleration amplitude: 4.9 g_rms

Acceleration spectral density: 0.05 g²/Hz

operating

Test duration:

3 h (1h each axis)

Kb Salt mist

DIN 40046 part 105

IEC 68-2-52

Concentration:

Duration:

Storage:

Storage duration:

Number of cycles:

5% (30°C)

Unit not

operating

cyclic

(sodium chloride

NaCl solution)

2 h per cycle

40°C, 93% rel. humidity

22 h per cycle

3

Table 20. Temperature specifications

Characteristic

min

–25

–40

–25

–40

–55

max

Unit

T_A

T_C

T_S

Standard operational ambient temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)

Extended operational ambient temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)

Standard operational case temperature range -7, overtemp. lock-out (PTC) at T_C> 95°C

Extended operational case temperature range -9, overtemp. lock-out (PTC) at TC > 95°C

Storage temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)

71

°C

95

100

Extended storage temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)

Thermal Considerations

P_o[%]

110

Operation at ambient temperatures of 71...85°C with con-

vection cooling will limit the maximum output power to 40%

(approx.) of the nominal value. Forced cooling (additional

heat sink, fan, etc.) allows operation of the power supply at

nominal output power up to an ambient temperature of

85°C, as long as the maximum case temperature T_{C max}

(95°C) is not exceeded. For the case temperature measur-

ing point see Mechanical Data.

P_{o max}(forced cooling)

100

90

80

70

60

50

40

30

20

10

0

P_{o max}

(convection cooling)

T_{C max}

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.

T_A[°C]

–25 50

60

70

80

90

100

Fig. 31

Output power derating versus T_A

Table 21: MTBF

Values at Specified

Case Temperature

Type

Ground Benign

Ground Fixed

Ground Mobile

Unit

40°C

150'000

500'000

70°C

50°C

MIL-HDBK 217F, (CK 1301-7R)

Device hours ¹

AK...LK

500'000

80'000

50'000

h

1

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

8 - 26

MELCHER

The Power Partners.

Rugged Environment

DC-DC Converters >100 W

K-Family

7 TE

9 TE

Mechanical Data

3.27

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

159

4.5

Test jacks

Option P

Option D(U

Option D(U )

)

to

ti

LED i

LED OK

LED I

oL

Measuring point of

case temperature T

C

50

80

171.93 (DIN 41494)

Main face

d

Front plate

168.5

Back plate

European

Projection

Note:

– d ≥15 mm, recommended minimum distance to

next part to ensure proper air circulation at full

output power.

Fig. 32

Case K02 with heatsink

Total weight: Approx. 1.55 kg

– free air locations: the module should be moun-

ted with fins in vertical position to achieve a

maximum air flow through heat sink.

50

7 TE

4 TE

3.27

5

158

M 4

Measuring point of

case temperature T

C

17.3

133.4

168 ^±0.5

47.2

171.93 (DIN 41494)

5

Fig. 33

Case K02 with option B1 (cooling plate)

Total weight: Approx. 1.15 kg

8 - 27

MELCHER

The Power Partners.

K-Family

DC-DC Converters >100 W

Rugged Environment

Type Key and Product Marking

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

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

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

67...385 V DC¹................................................ E

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

88...372 V DC(85…264 V AC) ........................ L

Family

Blank

........................................................................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 ²(24 V series conn. ³) ................... 20

5 V/15 V ²(30 V series conn. ³) ..................... 40

24 V/24 V ²(48 V series conn. ³) ................... 60

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

Operational ambient temperature range T_A:

–25…71°C ..................................................... -7

–40…71°C (optional) ..................................... -9

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

Feature: Output voltage control input ⁴......................... R

Options: Inrush current limitation ⁵

E

P

D

V

T

Potentiometer (output voltage adjustment) ⁴

Save data signal (D0...DD, to be specified) ⁶

ACFAIL signal (V0, V2, V3, to be specified) ^{6 7}

Current sharing

Cooling plate

B1

1

2

3

4

5

6

7

EK- types available upon customer request.

External wiring of main and second output depending upon the desired output configuration (see fig. 17b, c, d or e).

External wiring of main and second output (see fig.17a).

Feature R excludes option P and vice versa.

Option E available for C, D, E and LK types.

Option D excludes option V and vice versa.

Option V available for AK...LK 1001 types.

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 monitor option.

Accessories: Front panels, female connectors, mounting facilities, etc. please refer to section "Accessories".

Product Marking

Main face:

Basic type designation, applicable safety approval and recognition marks, warnings, pin allocation, Melcher

patents and company logo.

Front plate: Identification of LED's, test sockets and potentiometers.

Back plate: Specific type designation, input voltage range, nominal output voltages and output currents, pin allocation of

options and auxiliary functions, fuse specification and degree of protection.

Label:

Batch No., serial No. and data code including production site, modification status of main PCB and date of

production.

8 - 28

MELCHER

The Power Partners.


型号：	EK1001-7ERD2
厂家：	BEL FUSE INC.
描述：	DC-DC Regulated Power Supply Module, 1 Output, HEAT SINK, METAL, CASE K02, MODULE
文件：	总27页 (文件大小：640K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

EK1001-7ERD2 [BEL]

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