LK2540-9EPD6 [BEL]
AC-DC Regulated Power Supply Module, 2 Output, 150W, Hybrid;型号: | LK2540-9EPD6 |
厂家: | BEL FUSE INC. |
描述: | AC-DC Regulated Power Supply Module, 2 Output, 150W, Hybrid |
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 |
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 kVrms input 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 TC exceeds 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
Uo nom
[V DC]
Io nom
[A]2
Uo nom
[V DC]
Io nom
[A] 2
Ui min...Ui max
8...35 V DC
ηmin
[%]
5.1
20.0
10.0
8.0
AK 1001-7R
AK 1301-7R
AK 1501-7R
AK 1601-7R
78
80
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
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
79
Table 1b: Type survey BK, CK
Output 1
Output 2
Input Voltage Range and Efficiency1
Options
Uo nom
[V DC]
Io nom
[A]2
Uo nom
[V DC]
Io nom
[A] 2
Ui min...Ui max
14...70 V DC
ηmin
[%]
Ui min...Ui max
28...140 V DC
ηmin
[%]
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
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
80
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
80
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
Uo nom
[V DC]
Io nom
[A]2
Uo nom
[V DC]
Io nom
[A] 2
Ui min…Ui max
44...220 V DC
ηmin
[%]
Ui min...Ui max
20...100 V DC
ηmin
[%]
Ui min...Ui max
88...372 V DC
(85…264 V AC)
ηmin
[%]
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
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
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 Ui nom and Io nom
.
If the output voltages are increased above Uo nom via R-input control, option P setting, remote sensing or option T, the output currents
should be reduced accordingly so that Po 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 TA 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
≤100 V
≤400 V
Primary circuit
Double or reinforced,
based on
AC 150 V and DC 100 V
SELV
circuit
≤250V
≤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
Pin
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+
Vo1–
Vo1–
S+
Vo2+
Vo2+
Vo2–
Vo2–
Vo1+
Vo1–
R 1
Vo1+
Vo1–
Output 1
Output 1
Vo2+
Output 2
Output 2
Output 1
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
Output 1
Control of Uo1
Inhibit
Sense
Output 1
Output 1
Control of Uo1
Inhibit
Sense
S–
Sense
Control of Uo1
Inhibit
R1
Control of Uo1
Inhibit
i
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 N
Vi– or P
Vi+ or N
Vi+ or N
Vi– or P
Vi– or P
Vi+ or N
Vi– or P
Input or Neutral
Vi+
Input or Neutral
Input or Neutral
Input or Neutral
Input or Phase
Vi–
Input or Phase
Input or Phase
Input or Phase
Vi– or P
2
3
1 Feature 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 Uo1 and 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
Y
12
14
4
5
Y
4
6
30
32
24
8
Y
Y
10
10
–
+
1
2
3
4 Inrush 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
5 Input 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
– TA = 25°C, unless TC is specified.
– Pin 18 connected to pin 14, Uo adjusted to Uo 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
Ui
Input voltage range
Io = 0…Io nom
TC min…TC max
8
35
14
70
28
140 44
Ui nom Input voltage (nominal)
15
30
60
110
1.6
1
Ii
Input current
Ui nom, Io nom
9.0
6.0
3.0
A
Pi0
Pi inh
Ri
No-load input power
Idle input power
Input resistance
Ui min…Ui max
unit inhibited
TC = 25°C
2.5
1.5
2.5
1.5
2.5
2.5
1.5
W
1.5
65
100
150
800
170
mΩ
RNTC NTC resistance 2
Ci Input capacitance
TC = 25°C
–
–
1600
1000 260
3
3
830
1250 300
450 660
400 µF
Ui RFI Conducted input RFI
Radiated input RFI
EN 55022
A
B
B
B
B
B
>A
>A
Ui abs Input voltage limits
(without damage)
0
40
0
80
0
154
0
400 4 V 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
Ui
Input voltage range
Io = 0…Io nom
TC min…TC max
85
88
264
372
67
385
20
100
Ui nom Input voltage (nominal)
220
0.8
48
310
0.6
1
Ii
Input current
Ui nom, Io nom
3.75
A
Pi0
Pi inh
Ri
No-load input power
Idle input power
Input resistance
Ui min…Ui max
unit inhibited
TC = 25°C
2.5
1.5
2.5
1.5
2.5
1.5
W
180
3200
210
70
480
3200
210
mΩ
µF
RNTC NTC resistance 2
TC = 25°C
–
3
Ci Input capacitance
400
400
1200
1800
110
400
400
Ui RFI Conducted input RFI
Radiated input RFI
EN 55022
B
B
B
B
B
B
Ui abs Input voltage limits
(without damage)
0
0
–400
V DC
A
F
Fuse rating (nominal)
see Input Fuse
4.0
16.0
4.0
1 With double output modules, both outputs loaded with Io nom
.
2 Valid 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.
3 AK, BK and FK types have no NTC (inrush current limiter) fitted.
4 1 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 Ui = 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)
Ui source
Iinr p = ––––––––––––––––
(Rs ext + Ri + RNTC
)
Table 5: Fuse Specification
Rs ext
Iinr p
Ri
RNTC
Module
Fuse type
Fuse rating
AK 1
BK 1
CK 2
DK 2
EK 2
FK2
LK 2
fast-blow
fast-blow
slow-blow
slow-blow
slow-blow
slow-blow
slow-blow
Little fuse 314 30.0 A, 125 V
Little fuse 314 25.0 A, 125 V
+
Ci int
Ui source
SPT
SPT
SPT
SPT
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
2 Fuse 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.
Ii 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 Ui min or ex-
ceeds approx. 1.1 Ui max, an internally generated inhibit sig-
nal disables the output(s). When checking this function the
absolute maximum input voltage rating Ui 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 Ui max, Rext = 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
th (ms)
Ii (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
Ui
____
0.10
Ui min
1
2
3
4
5
6
Ui
Fig. 7
____
0.10
Ui min
Typical hold-up time th versus relative input voltage Ui/Ui
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)
dB (µV)
90
80
80
70
60
50
EN 55022 A
EN 55022 B
60
A
40
B
40
30
20
20
10
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 Ui nom
o nom, measured with an artificial mains network and a
Fig. 9
,
Typical radio frequency-interference voltage at Ui nom
,
I
Io 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 Vp
1500 Vp
3000 Vp
4000 Vp
7000 Vp
3.5 • Ubatt
1.5 • Ubatt
960 Vp
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 Vp
3600 Vp
4800 Vp
8400 Vp
1800 Vp
3600 Vp
4800 Vp
8400 Vp
100 Ω
G
H
J
6
Indirect coupled
transient
+o/c, –o/c
K
L
1
1
Electrostatic
discharge
IEC 801-2
(1991-04)
4
contact discharge 8000 Vp
to case,
330 Ω
10 positive and
10 negative
discharges
yes
yes
air disch. to case 15000 Vp
Electric field
IEC 801-3
(1984)
3
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 Vp bursts 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 Vp 300 ms period
1
1
Transient
IEC 801-5
(Draft 1993-01)
i/c
2000 Vp
2000 Vp
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 Vrms 80%, 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
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Rugged Environment
DC-DC Converters >100 W
K-Family
Electrical Output Data
General Conditions, valid for all tables Output data.
– TA = 25°C, unless TC is specified.
– Pin 18 connected to pin 14, Uo adjusted to Uo 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
Ui nom, Io nom
min typ max min typ max min typ max min typ max Unit
Uo
Output voltage
5.07
5.13 11.93
12.07 14.91
15.09 23.86
24.14
V
UoL
Overvoltage protection Failure in
control circuit
7.6
21
26.5
43.5
Io nom Output current 1 AK/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
IoL
Output current AK/BK Ui min…Ui max
limit4
5.2/6.2
TC min…TC max
uo
Output voltage noise
Ui nom, Io nom
10
5
5
5
mV
rms
BW = 20 MHz
100
75
60
90
mVpp
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
±15
±25
±30
±30 mV
Ui nom, Io =
20
25
30
40
(0.1…1)Io nom
5
uo d
Dynamic load regulation Ui nom
,
±100
±90
±100
±90
Io =
5
t d
Recovery time of
dynamic load regulation
0.3
0.4
0.4
0.4
ms
(1…1/
…1)Io nom
2
α
Temperature coefficient TC min…TC max
of output voltage 6
–1
–1
–1
–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
Ui nom, Io nom
min
typ
24.0 2
39
max
min
typ
30.0 2
49
max
min
typ
48.0 2
72
max
Unit
V
Uo
Output voltage
UoL
Overvoltage protection Failure in
control circuit
Io nom Output current 1 AK/BK
5.0/6.0
4.0/5.0
2.5/3.0
A
IoL
Output current AK/BK Ui min…Ui max
5.2/6.2
4.2/5.2
2.7/3.2
limit 4
TC min…TC max
uo
Output voltage noise 3
Ui nom, Io nom
BW = 20 MHz
10
60
10
60
5
mV
rms
80
mVpp
mV
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
±15
±15
±20
Ui nom, Io =
25
25
35
(0.1…1)Io nom
5
uo d
Dynamicload regulation Ui nom
,
±180
±160
±100
Io =
5
t d
Recovery time of
dynamic load regulation
0.3
0.2
0.2
ms
(1…1/
…1)Io nom
2
α
Temperature coefficient TC min…TC max
of output voltage 6
–2
–2
–2
mV/K
Uo
1 If the output voltages are increased above Uo nom through R-in-
put control, option P setting, remote sensing or option T, the out-
put current should be reduced accordingly so that Po nom is not
exceeded.
3 Shortest possible wiring for series connection at the connector.
4 See fig. Output voltage regulation of single output units.
5 See fig. Dynamic load regulation of Uo1 and Uo2.
6 Negative temperature coefficient (0...3 mV/cell and K) available
on request
2 Series connection for Uo nom = 24 V, 30 V or 48 V, see fig. 17a.
Edition 2/96 - © Melcher AG
8 - 11
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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
Uo
Output voltage
Ui nom, Io nom
11.93
12.07 11.82
12.18 14.91
15.09 14.78
15.22
V
A
UoL
Overvoltage protection Failure in
21
26.5
control circuit
Io nom Output current 3 AK/BK
5.0/6.0
5.2/6.2
5.0/6.0
5.2/6.2
4.0/5.0
4.0/5.0
4.2/5.2
IoL
Output current AK/BK Ui min...Ui max
limit4
4.2/5.2
TC min...TC max
uo
Output voltage noise
Ui nom, Io nom
BW = 20 MHz
10
20
10
20
10
25
10
25
mV
rms
mVpp
mV
∆Uo
Static line regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
±30
±30
±30
±30
8
8
Static load regulation
Ui nom, Io =
(0.1...1) Io nom
50
50
5
6
uo d
Dynamicload regulation Ui nom
,
±80
±80
mV
ms
Io =
(1...1/
7
t d
Recovery time of
dynamic load regulation
0.2
0.2
2
...1)Io nom
α
Temperature coefficient TC min...TC max
of output voltage 7
–1
–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
Uo
Output voltage
Ui nom, Io nom
23.86
24.14 23.64
24.36
V
A
UoL
Overvoltage protection Failure in
36
36
control circuit
Io nom Output current 3 AK/BK
2.5/3.0
2.5/3.0
IoL
Output current AK/BK Ui min…Ui max
2.7/3.2
2.7/3.2
limit4
TC min…TC max
uo
Output voltage noise
Ui nom, Io nom
5
5
mV
rms
BW = 20 MHz
30
30
mVpp
mV
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
±40
±40
8
Ui nom, Io =
(0.1…1)Io nom
70
5
6
uo d
Dynamic load regulation Ui nom
,
±50
mV
ms
Io =
6
t d
Recovery time of
0.2
(1…1/
…1)Io nom
2
dynamic load regulation
α
Temperature coefficient TC min…TC max
of output voltage 7
–1
mV/K
Uo
4 See fig. Output voltage regulation of single output units.
1 Depending upon the desired output configuration the wiring
should be made as shown in fig. 17b, c, d or e.
5 Condition for specified output. Other output loaded with con-
stant current Io = Io nom
2 Same conditions for both outputs.
3 If the output voltages are increased above Uo nom via R-input
control, option P setting, remote sensing or option T, the output
currents should be reduced accordingly so that Po nom is not ex-
ceeded.
6 See fig. Dynamic load regulation of Uo1 and Uo2.
7 Negative temperature coefficient (0…3 mV/cell and K) available
on request.
8 See Output Voltage Regulation of Double Output Modules with
Output 1 and 2 in Symmetrical Configuration.
8 - 12
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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
Uo
Output voltage
Ui nom, Io nom
5.07
26
5.13 11.93
12.07 14.91
15.09 23.86
24.14
V
UoL
Overvoltage protection Failure in
control circuit
7.6
20
26.5
10.0
39
Io nom Output current 1
25.0
12.0
6.0
A
IoL
Output current limit 4
Ui min...Ui max
TC min...TC max
12.2
10.2
6.2
uo
Output voltage noise
Ui nom, Io nom
10
5
5
5
mV
rms
BW = 20 MHz
100
75
60
90
mVpp
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
,
,
±15
±25
±30
±30 mV
Ui nom, Io =
20
25
30
40
(0.1...1) Io nom
5
uo d
Dynamic loadregulation Ui nom
,
±100
±100
±100
±80
Io =
(1...1/
5
t d
Recovery time of
dynamic load regulation
0.3
0.5
0.4
0.3
ms
2
...1) Io nom
α
Temperature coefficient TC min...TC max
of output voltage 6
–1
–1
–1
–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
Ui nom, Io nom
min
typ
24.0 2
39
max
min
typ
30.0 2
48
max
min
typ
48.0 2
74
max
Unit
V
Uo
Output voltage
UoL
Overvoltage protection Failure in
control circuit
Io nom Output current 1
6.0
5.0
3.0
A
IoL
Output current limit 4
Ui min...Ui max
TC min...TC max
6.2
5.2
3.2
uo
Output voltage noise3
Ui nom, Io nom
15
15
20
mV
rms
BW = 20 MHz
200
±40
250
±30
250
±50
mVpp
mV
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
Ui nom, Io =
40
30
40
(0.1...1) Io nom
5
uo d
Dynamic load regulation Ui nom
,
±180
±160
±90
Io =
(1...1/
5
t d
Recovery time of
dynamic load regulation
0.3
0.2
0.2
ms
2...1)Io nom
α
Temperature coefficient TC min...TC max
of output voltage 6
–2.2
–2.2
–2.6
mV/K
Uo
1 If the output voltages are increased above Uo nom through R-in-
put control, option P setting, remote sensing or option T, the
output currents should be reduced accordingly so that Po nom is
not exceeded.
3 Shortest possible wiring for series connection at the connector.
4 See fig. Output voltage regulation of single output units.
5 See fig. Dynamic load regulation of Uo1 and Uo2.
6 Negative temperature coefficient (0...3 mV/cell and K) available
on request.
2 Series connection for Uo 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
Uo
Output voltage
Ui nom, Io nom
11.93
6.2
12.07 11.82
12.18 14.91
15.09 14.78
15.22
V
A
UoL
Overvoltage protection Failure in
19
19
24
24
control circuit
Io nom Output current 3
6.0
6.0
5.0
5.0
IoL
Output current limit 4
Ui min...Ui max
TC min...TC max
6.2
5.2
5.2
uo
Output voltage noise
Ui nom, Io nom
BW = 20 MHz
10
10
50
10
10
50
mV
rms
150
200
mVpp
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
±30
±40
±30
±40 mV
8
8
Ui nom, Io =
(0.1...1) Io nom
100
100
5
6
uo d
Dynamic load regulation Ui nom
±80
±80
mV
ms
Io =
6
t d
Recovery time of
0.2
0.2
(1...1/
...1) Io nom
2
dynamic load regulation
α
Temperature coefficient TC min...TC max
of output voltage 7
–1.1
–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
Uo
Output voltage
Ui nom, Io nom
23.86
3.2
24.14 23.64
24.36
V
A
UoL
Overvoltage protection Failure in
37
37
control circuit
Io nom Output current 3
3.0
3.0
IoL
Output current limit 4
Ui min...Ui max
,
3.2
TC min...TC max
uo
Output voltage noise
Ui nom, Io nom
BW = 20 MHz
,
10
10
50
mV
rms
200
mVpp
mV
∆Uo
Static line regulation
Static load regulation
Ui min...Ui nom
Ui nom...Ui max
Io nom
,
±30
±50
,
8
Ui nom, Io =
(0.1...1) Io nom
50
5
6
uo d
Dynamic load regulation Ui nom
,
±50
mV
ms
Io =
(1...1/
6
t d
Recovery time of
dynamic load regulation
0.2
2
...1) Io nom
α
Temperature coefficient TC min...TC max
of output voltage 7
–1.3
mV/K
Uo
1 Depending upon the desired output configuration the wiring
should be made as shown in fig. 17b, c, d or e.
2 Same conditions for both outputs.
3 If the output voltages are increased above Uo nom via R-input
control, option P setting, remote sensing or option T, the output
currents should be reduced accordingly so that Po nom is not ex-
ceeded.
4 See fig. Output voltage regulation of single output units.
5 Condition for specified output. Other output loaded with con-
stant current Io = Io nom
.
6 See fig. Dynamic load regulation of Uo1 and Uo2.
.
7 Negative temperature coefficient (0...3 mV/cell and K) available
on request.
8 See Output Voltage Regulation of Double Output Modules with
Output 1 and 2 in Symmetrical Configuration.
8 - 14
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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 Uo1 are 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.
1 In case of double output units externally connected in series for
Uo = 24 V, 30 V or 48 V the monitored output voltage is 12 V,
15 V or 24 V respectively.
Inhibit Function
Output
Uo 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
tf
tr
Table 9: Inhibit characteristics
Inhibit
1
Characteristic
Conditions
min typ max Unit
Uinh Inhibit Uo = on Ui min…Ui max –50
voltage
0.8
50
V
t
0
Uo = off
2.4
Fig. 10
Iinh Inhibit current
Uinh = 0
–400 µA
Typical output response as a function of inhibit control
tr
tf
Rise time
Fall time
30
depending on Io
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 Uo 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
< 0.25 V
12 V, 15 V
For further information, please refer to "Application Notes ".
If the output voltages are increased above Uo nom via R-in-
put control, option P setting, remote sensing or option T, the
output currents must be reduced accordingly so that
Po 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
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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] Uo2
15.75
Io1 = 5.00 A
Io1 = 3.75 A
Io1 = 2.50 A
Io1 = 1.25 A
Io1 = 0.50 A
15.50
15.25
15.00
14.75
14.50
14.25
14.00
Uo
Uo nom
0.98
0.5
AK…LK
Io1
IoL
Io2
0
1
2
3
4
5
6
7
[A]
Io nom
Io
Io nom
Fig. 13
0
0.5
1.0
AK...LK 2540: ∆ Uo2 (typ.) vs. Io2 with different I01
Fig.11
o1 vs. Io1 (typ.) of single output units
U
[V] Uo2
26.0
Output Voltage Regulation of Double Output Modules
with Output 1 and 2 in Symmetrical Configuration
Io1 = 3.0 A
Io1 = 2.0 A
25.5
25.0
24.5
24.0
23.5
23.0
Io1 = 1.0 A
Io1 = 0.5 A
Io1 = 0.3 A
Output 1 is under normal conditions regulated to Uo1 nom
independent of the output currents.
,
Uo2 is dependent upon the load distribution. When both out-
puts are loaded with more than 10% of Io nom, the deviation
of Uo2 remains within ±5% of the value of Uo1. The following
3 figures show the regulation with varying load distribution.
If Io1 = Io2 or the two outputs are connected in series, the de-
viation of Uo2 remains within ±1% of the value of Uo1 pro-
vided that a total load of more than 10% of Io 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.
Io2
[A]
0
0.5
1
1.5
2
2.5
3
3.5
4
Io nom
Fig. 14
[V] Uo2
AK...LK 2660: ∆ Uo2 (typ.) vs. Io2 with different I01
12.6
Io1 = 6.0 A
Io1 = 4.5 A
Io1 = 3.0 A
Uo1
12.4
Uo1d
Ur
Ur
Io1 = 1.5 A
12.2
12.0
11.8
11.6
11.4
11.2
Io1 = 0.6 A
Uo1d
td
td
t
t
Uo2
Uo2d
Io1/Io1 nom
Io2
[A]
1
Io2/Io2 nom
0
1
2
3
4
5
6
7
8
Io nom
0.5
Fig. 12
<10 µs
<10 µs
AK...LK 2320: ∆ Uo2 (typ.) vs. Io2 with different I01
t
0
Fig. 15
Typical dynamic load regulation of Uo1 and Uo2
8 - 16
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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
Uext or a resistor Rext to adjust the desired output voltage.
When not connected, the control input automatically sets
– If the output voltages are increased above Uo nom via R-
input control, option P setting, remote sensing or option
T, the output current(s) should be reduced accordingly so
that Po nom is not exceeded.
– The R-input (as well as option P) is related to the main
output.
the output voltage to Uo nom
.
a)Adjustment by means of an external control voltage Uext
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% Uo nom
.
U
Uo nom
Uext = –––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 (Uo < Uo nom) to
achieve an output voltage adjustment range of approxi-
mately 0...100% Uo nom
+
16
14
Module
Uext
S–
or: Between pin 16 and pin 12 (Uo > Uo nom) to achieve an
output voltage adjustment range of approximately
Vo1–
Vi–/P
Vi+/N
100...110% Uo nom
.
Warning:
Vo1+
– Uext shall never exceed 2.75 V DC.
S+
R
12
– The value of R'ext shall never be less than the lowest
value as indicated in table R'ext for (Uo > Uo nom) to
avoid damage to the unit!
R'ext
Rext
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: Rext for Uo < Uo nom; approximate values (Ui nom, Io nom, series E 96 resistors); R'ext = ∞
Uo nom = 5.1 V
Uo (V) Rext [kΩ]
Uo nom = 12 V
Uo [V] 1
Uo nom = 15 V
Uo [V] 1
Uo nom = 24 V
Uo [V] 1
Rext [kΩ]
Rext [kΩ]
Rext [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’ext for Uo > Uo nom; approximate values (Ui nom, Io nom, series E 96 resistors); Rext = ∞
Uo nom = 5.1 V
Uo [V] R'ext [kΩ]
5.15 422
Uo nom = 12 V
Uo [V] 1
Uo nom = 15 V
Uo [V] 1
Uo nom = 24 V
R'ext [kΩ]
R'ext [kΩ]
Uo [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
1 First 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
The Power Partners.
K-Family
DC-DC Converters >100 W
Rugged Environment
Programmable Output Voltage (R-Function) continued
+
Vo2+
+
4
Vo2+
Vo2+
Vo2–
Vo2–
Vo1+
Vo1–
4
6
Vo2+
Vo2–
Vo2–
Vo1+
Vo1–
6
8
12 V
15 V
24 V
1
Uo1
24 V
30 V
48 V
8
1
Uo1
10
12
14
–
10
12
2
–
14
16
Rext R'ext
Rext R'ext
16
R
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+
Vo2–
Vo2–
Vo1+
Vo1–
4
6
+
+
Vo2+
Vo2+
Vo2–
Vo2–
Vo1+
Vo1–
4
6
1
1
Uo2
–12/–15/–24 V
+12/+15/+24 V
8
–
+
Uo2
8
+12/+15/+24 V
0 V
Uo1
10
12
10
12
2
1
1
Uo1
14
16
14
16
Rext R'ext
Rext R'ext
R
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 Uo1 and Uo2: ±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 Uo1 and Uo2: +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+
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
1
Uo2
–
+
8
10
12
12 V
15 V
24 V
Uo1
–
14
16
Rext R'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 Uo1 and Uo2: 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: Uo2 varies depending upon its own load and
the load on output 1.
8 - 18
Edition 2/96 - © Melcher AG
MELCHER
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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
kVrms
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
6.4
3.2
3.2
2.0
2.0
0.8
0.8
mm
CK...LK
Display Status of LEDs
Uo > 0.95...0.985Uo adj
Fig. 18
OK
i
Io L
LEDs "OK", "i" and "Io L"status versus input voltage
Conditions: Io ≤ Io nom, TC ≤ TC max, Uinh ≤ 0.8 V
U
i uv = undervoltage lock-out, Ui ov = overvoltage lock-out
Ui
Ui uv Ui min
Uo > 0.95...0.985Uo adj
Ui max Ui ov Ui abs
Uo < 0.95...0.985Uo adj
LEDs "OK" and "Io L"status versus output current
OK
Io L
Conditions: Ui min...Ui max, TC ≤ TC max, Uinh ≤ 0.8 V
Io
Io nom
IoL
LED "i"versus case temperature
i
i
Conditions: Ui min...Ui max, Io ≤ Io nom, Uinh ≤ 0.8 V
TC
TC max
Uinh threshold
TPTC threshold
LED "i"versus Uinh
Ui inh
Conditions: Ui min...Ui max, Io ≤ Io nom, TC ≤ TC 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 TA = –40°C...71°C
Electronic inrush current limitation circuitry
Potentiometer for Uo adjustment
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
2 Option 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.
Edition 2/96 - © Melcher AG
8 - 19
MELCHER
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DC-DC Converters >100 W
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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)
RS
Ci
RI
Fig. 19
Option E block diagram
CapacitorCi
fully charged
Normal operation
(current limiting
circuit is fully
Î [A]
Ui/RV
conducting)
Table 14: Inrush current characteristics with option E
Characteristics
CK
60
DK
110
7.4
EK/LK Unit
Ii = Pi/Ui
t [ms]
Ui nom, Io nom Input voltage
220
V
A
Iinr p
Peak inrush
current
6.8
14.6
0
tinr
Inrush current
duration
18
14
16
ms
0
<30
Ui max, Io nom Input voltage
140
9.3
220
380
V
A
RV: Current limiting resistance = RS + RI = 15 Ω
Iinr p
Peak inrush
current
14.5
25.3
Fig. 20
tinr
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 (TC = 95°C) max. 1 cycle every 8 sec.
Option P Potentiometer
The potentiometer provides an output voltage adjustment
range of +10/–60% of Uo 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 Uo nom via R-in-
put control, option P setting, remote sensing or optionT, the
output current(s) should be reduced accordingly so that
Po 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
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MELCHER
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DC-DC Converters >100 W
K-Family
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
1
Module
Vo2+
T
3
S–
Module
Vo–
Vi–/P
Vo1–
Vo2–
Vi–/P
max. 5 units in parallel connection
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
Ut. The return for this signal is Vo1–. The D output recovers
when the monitored voltage(s) exceed(s) Ut + Uh. The
threshold levels Uti and Uto are 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 Ut
Uti Uto
Typical hysteresis Uh [% of Ut]
for U t min...Ut max
JFET
NPN
Ui
Uo1
Uhi
Uho
2.5...0.6
-
D1
D2
D3
D4
D0
D5
D6
D7
D8
D9
no
yes
yes
no
yes
no
-
3.5...40 V 1
-
1
1
Ui min...Ui max
Ui min...Ui max
-
-
3.4...0.4
3.4...0.4
-
yes
yes
yes
no
(0.95...0.985 Uo1) 2
(0.95...0.985 Uo1) 2
3.5...40 V 3
-
"0"
"0"
no
-
-
2.5...0.6
-
3 4
3 4
3 4
1
yes
yes
yes
yes
Ui min...Ui max
Ui min...Ui max
Ui min...Ui max
Ui min...Ui max
3.4...0.4
3.4...0.4
3.4...0.4
3.4...0.4
yes
yes
yes
3.5...40 V3
(0.95...0.985 Uo1) 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 Uo1 is 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 Io nom
4
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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. UD ≤ 0.4 V (logic low) corresponds
to a monitored voltage level (Ui and/or Uo1) < Ut. The cur-
rent ID through 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
D
U
≤ 6 V
D
Ui, Uo1 status
Ui or Uo1 < Ut
D output, UD
Vi–
low, L, UD ≤ 0.4 V at ID = 2.5 mA
high, H, ID ≤ 25 µA at UD = 5.25 V
Vo1–
Ui and Uo1 > Ut + Uh
Fig. 24
Option D1...D0: JFET output, ID ≤ 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. UD < 0.4 V (logic low) corresponds to a monitored
voltage level (Ui and/or Uo1) > Ut +Uh. The current ID
through the open collector should not exceed 20 mA. The
NPN output is not protected against external overvoltages.
UD should not exceed 40 V.
R
p
I
D
D
U
D
Vi–
Ui, Uo1 status
Ui or Uo1 < Ut
D output, UD
Vo1–
high, H, ID ≤ 25 µA at UD = 40 V
low, L, UD ≤ 0.4 V at ID = 20 mA
Fig. 25
Ui and Uo1 > Ut + Uh
Option D5...DD: NPN output, Uo1 ≤ 40 V, ID ≤ 20 mA
Threshold tolerances and hysteresis:
If Ui is 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 ∆Uti across input filter and rectifier. The
threshold levels of the D0 and D9 options are factory ad-
justed at nominal output current Io nom and at TA = 25°C.The
value of ∆Uti depends upon the input voltage range (CK,
DK, ..), threshold level Ut, temperature and input current.
The input current is a function of the input voltage and the
output power.
UD
∆Uti
Uhi
UD high
P
P
P
P
P
P
UD low
Ui
Uti
Fig. 26
Definition of Uti, ∆Ut i and ∆Uhi (JFET output)
Table 16: D-output logic signals
Version of D
Ui < Ut resp. Uo < Ut
Ui > Ut + Uh resp. Uo > Ut
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
UD
UD high
3
3
3
3
UD low
0
t
ID
ID high
ID low
0
t
JFET UD
UD high
UD low
0
t
1
4
4
4
th
tlow min
tlow min
tlow min
thigh min
Uo1
Uo1 nom
1
th
1
0.95
t
t
0
Ui [V DC]
Uti +Uhi
Uti
0
Input voltage failure
Switch-on cycle
Input voltage sag
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
NPN UD
2
UD high
UD low
0
t
t
ID
ID high
ID low
0
UD
JFET
UD high
1 Hold-up time see section Electrical Input Data
2 With output voltage monitoring, hold-up time th = 0.
3 The signal will remain high if the D output is connected to
an external source.
UD low
0
t
t
4
tlow min
Uo1
Uo1 nom
Uto +Uho
Uto
4 tlow min = 100...170 ms, typically 130 ms.
0
Output voltage failure
Fig. 27
Relationship between Ui, Uo1, UD, Uo1/Uo nom versus time
Edition 2/96 - © Melcher AG
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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 (Uo1 nom = 5.1 V
only) equivalent to option D and generates an ACFAIL sig-
nal (V signal) which conforms to the VME standard.
2 • Po • (th + 0.3 ms) • 100
Ci ext = –––––––––––––––––––––– – Ci min
2
η • (Uti 2 – Ui min
)
where as:
The low state level of the ACFAIL signal is specified at a
sink current of IV ≤ 48 mA to UV ≤ 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.
Ci min = internal input capacitance [mF]
Ci ext = external input capacitance [mF]
Po
η
= output power [W]
= efficiency [%]
th
= hold-up time [ms]
Ui min = minimum input voltage [V]1
After the ACFAIL signal has gone low, the VME standard
requires a hold-up time th of 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 th is provided by the internal input capaci-
tance. Consequently the working input voltage and the
threshold level Uti should be adequately above the mini-
mum input voltage Ui 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 (Ci ext) should be added.
Uti
= threshold level [V]
1 Min. input voltage according to "Electrical Input Data". For out-
put voltages Uo > Uo nom, the minimum input voltage increases
proportionally to Uo/Uo nom
.
Remarks:
Option V2 and V3 can be adjusted by potentiometer to a
threshold level between Ui min and Ui 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 th:
2 • Po • (th + 0.3 ms) • 100
2
Uti = ––––––––––––––––––––– + Ui min
Ci min • η
Table 17: Available internal input capacitance and factory potentiometer setting of Uti with resulting hold-up time
Types
Ci min
Ut 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
th
0.1
3.4
1.1
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 Ut. The return for this
signal is Vo1–. The V output recovers when the monitored
voltage(s) exceed(s) Ut + Uh. The threshold level Uti is 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 Ut
Uti Uto
Typical hysteresis Uh [% of Ut]
for Ut min…Ut max
Ui
Uo1
no
Uhi
Uho
1
–
V2
V3
V0
yes
yes
yes
yes
Ui min...Ui max
Ui min...Ui max
Ui min...Ui max
Ui min...Ui max
3.4...0.4
3.4...0.4
3.4...0.4
3.4...0.4
–
1
2
2
yes
no
0.95...0.985 Uo1
–
"0"
–
3 4
3 4
yes
0.95...0.985 Uo1
"0"
1 Threshold level adjustable by potentiometer. 2 Fixed value between 95% and 98.5% of Uo1 (tracking). 3 Adjusted at Io nom
.
4 Fixed 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. UV ≤ 0.6 V (logic low) corre-
sponds to a monitored voltage level (Ui and/or Uo1) <Ut.
The current IV through the open collector should not exceed
50 mA. The NPN output is not protected against external
overvoltages. UV should not exceed 60 V.
RP
IV
UV
Vi–
Ui, Uo1 status
V output, UV
Vo1–
Ui or Uo1 < Ut
low, L, UV ≤ 0.6 V at IV = 50 mA
high, H, IV ≤ 25 µA at UV = 5.1 V
Fig. 28
Output configuration of options V0, V2 and V3
Ui and Uo1 > Ut + Uh
8 - 24
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
Rugged Environment
DC-DC Converters >100 W
K-Family
UV
∆Uti
Uhi
Threshold tolerances and hysteresis:
If Ui is 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 ∆Uti across input filter and rectifier. The
threshold level of option V0 is adjusted during manufacture
at Io nom and TA = 25°C.The value of ∆Uti depends upon the
input voltage range (AK, BK, ...), threshold level Ut, tem-
perature and input current. The input current is a function of
input voltage and output power.
UV high
P
P
P
P
P
P
UV low
Ui
Uti
Fig. 29
Definition of Uti, ∆Uti and Uhi
Input voltage monitoring
2
2
2
tlow min
tlow min
tlow min
V2
UV
3
3
3
UV high
4
2
4
2
UV low
0
t
t
tlow min
tlow min
V3
UV
3
3
3
UV high
UV low
0
1
1
th
th
Uo1
5.1 V
4.875 V
2.0 V
0
t
Ui [V DC]
Uti + Uhi
Uti
t
0
Input voltage failure
Switch-on cycle
Input voltage sag
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
V2 UV
UV high
1 VME request: minimum 4 ms
2 tlow min = 40...200 ms, typically 80 ms
4
4
UV low
3 UV level not defined at Uo1 < 2.0 V
4 The V signal drops simultaneously with the output voltage. If the
pull-up resistor RP is connected to Vo1+.The V signal remains
high if RP is connected to an external source.
0
2
tlow min
V3 UV
UV high
3
3
4
UV low
0
Uo1
5.1 V
4.875 V
2.0 V
0
Ui
Uti + Uhi
Uti
Fig. 30
Relationship between Ui, Uo1, UV, IV and Uo1/Uo nom ver-
sus time.
0
Output voltage failure
Option B1 Cooling Plate (see "Mechanical Data")
perature TC 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)
PLoss = –––––––––– (Uo • Io)
η
Efficiency η see Type survey
Edition 2/96 - © Melcher AG
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 gn = 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 grms
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
–40
–55
max
Unit
TA
TA
TC
TC
TS
TS
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 TC > 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
71
°C
95
95
100
100
Extended storage temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)
Thermal Considerations
Po [%]
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 TC max
(95°C) is not exceeded. For the case temperature measur-
ing point see Mechanical Data.
Po max (forced cooling)
100
90
80
70
60
50
40
30
20
10
0
Po max
(convection cooling)
TC 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.
TA [°C]
–25 50
60
70
80
90
100
Fig. 31
Output power derating versus TA
Table 21: MTBF
Values at Specified
Case Temperature
Type
Ground Benign
Ground Fixed
Ground Mobile
Unit
40°C
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
Edition 2/96 - © Melcher AG
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
Edition 2/96 - © Melcher AG
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 Ui:
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), Uo1 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, Uo1/2 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 TA:
–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
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
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