K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Features
• RoHS lead-free-solder and lead-solder-exempted
products are available.
• Compliant with EN 50155, EN 50121-3-2, EN 45545.
• Class I equipment
• Extremly wide input voltage ranges from 8 to 385 VDC,
and 85 to 264 VAC, 47 to 440 Hz
• Input over- and undervoltage lockout
• Adjustable output voltage with remote on/off
• 1 or 2 outputs: SELV, no load, overload, and shortcircuit proof
• Rectangular current limiting characteristic
• PCBs protected by lacquer
• Very high reliability
Safety-approved according to IEC/EN 60950-1, UL/CSA
60950-1 2nd Ed.
111
4.4"
3U
80
3.2"
16 TE
168
6.6"
Description
The K Series of DC-DC and AC-DC converters represents a
broad and flexible range of power supplies for use in advanced
electronic systems. Features include high efficiency, high
reliability, low output voltage noise and excellent dynamic
response to load/line changes. LK models can be powered by
DC or AC with a wide-input frequency range (without PFC).
The converter inputs are protected against surges and
transients. An input over- and undervoltage lockout circuitry
disables the outputs, if the input voltage is outside of the
specified range. Certain types include an inrush current limiter
preventing circuit breakers and fuses from tripping at switchon.
All outputs are open- and short-circuit proof, and are protected
against overvoltages by means of built-in suppressor diodes.
The output can be inhibited by a logic signal applied to pin 18
(i). The inhibit function is not used, pin 18 must be connected
with pin 14 to enable the outputs.
LED indicators display the status of the converter and allow for
visual monitoring of the system at any time.
Table of Contents
The case design allows operation at nominal load up to 71 °C
with natural cooling. If forced cooling is provided, the ambient
temperature may exceed 71 °C, but the case temperature
must remain below 95 °C.
A temperature sensor generates an inhibit signal, which
disables the outputs when the case temperature TC exceeds
the limit. The outputs are automatically re-enabled, when the
temperature drops below the limit.
Various options are available to adapt the converters to
individual applications.
The converters may either be plugged into a 19 " DIN-rack
system according to IEC 60297-3, or be chassis mounted.
Important: For applications requiring compliance with IEC/EN
61000-3-2 (harmonic distortion), please use our LK4000 or
LK5000 Series with incorporated power factor correction (PFC).
Page
Description ......................................................................... 1
Model Selection .................................................................. 2
Functional Description ....................................................... 4
Electrical Input Data ........................................................... 5
Electrical Output Data ......................................................... 8
Auxiliary Functions ............................................................ 12
BCD20002-G Rev AC, 31-Jan-2014
Full input-to-output, input-to-case, output-to-case, and output
to output isolation is provided. The converters are designed,
built, and safety-approved to the international safety standards
IEC/EN 60950-1. They are particulary suitable for railway
applications and comply with EN 50155 and EN 50121-3-2.
Page
Electromagnetic Compatibility (EMC) .............................. 15
Immunity to Environmental Conditions ............................ 17
Mechanical Data ............................................................... 18
Safety and Installation Instructions .................................. 20
Description of Options ..................................................... 23
Accessories ...................................................................... 30
MELCHER
The Power Partners.
Page 1 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Model Selection
Non-standard input/output configurations or special customer adaptations are available on request.
Table 1a: Models AK
Output 1
Vo nom
Io nom
[VDC]
[A]
Output 2
Vo nom
Io nom
[VDC]
[A]
Effic.1
η min
[%]
Input Voltage
Vi min – Vi max
8 – 35 VDC
5.1
12
15
24
20
10
8
5
–
–
–
–
–
–
–
–
AK1001-9R
AK1301-9R
AK1501-9R
AK1601-9R
78
80
82
84
12
15
24
5
4
2.5
12 3
15 3
24 3
5
4
2.5
AK2320-9R
AK2540-9R
AK2660-9R
78
80
79
Options
-7, P, D, V 2, T, B, B1, G
-7, P, D, T, B, B1, G
Table 1b: Models BK, FK, CK
Output 1
Vo nom
Io nom
[VDC]
[A]
Output 2
Vo nom
Io nom
[VDC]
[A]
Input Voltage
Vi min – Vi max
14 – 70 VDC
Effic.1 Input Voltage
ηmin
Vi min – Vi max
[%]
20 – 100 VDC
Effic.1
ηmin
[%]
Input Voltage
Vi min – Vi max
28 – 140 VDC
Effic.1
ηmin
[%]
Options
5.1
12
15
24
25
12
10
6
–
–
–
–
–
–
–
–
BK1001-9R
BK1301-9R
BK1501-9R
BK1601-9R
80
82
84
85
FK1001-9R
FK1301-9R
FK1501-9R
FK1601-9R
80
82
85
86
CK1001-9ER
CK1301-9ER
CK1501-9ER
CK1601-9ER
80
82
85
86
-74, P, D, V 2, K7, T,
B, B1, G
12
15
24
6
5
3
12 3
15 3
24 3
6
5
3
BK2320-9R
BK2540-9R
BK2660-9R
80
82
82
FK2320-9R
FK2540-9R
FK2660-9R
81
83
84
CK2320-9ER
CK2540-9ER
CK2660-9ER
81
84
84
-74, P, D, T,
B, B1, G
Table 1c: Models DK, EK, LK
Output 1
Vo nom
Io nom
[VDC]
[A]
5.1
12
12.84 5
15
24
25
12
10
10
6
12
15
24
25.68 6
6
5
3
2.5
1
2
3
4
5
6
7
Output 2
Vo nom
Io nom
[VDC]
[A]
–
–
–
–
–
12 3
15 3
24 3
25.68 3
6
Input Voltage
Vi min – Vi max
44 – 220 VDC
Effic.1 Input Voltage
ηmin
Vi min – Vi max
[%] 67 – 385 VDC
Effic.1 Input Voltage Effic.1
ηmin
ηmin
Vi min – Vi max
[%]
88 – 372 VDC
[%]
100 – 240 VAC
Options
–
–
–
–
–
DK1001-9ER
DK1301-9ER
DK1740-9ER 5
DK1501-9ER
DK1601-9ER
80
83
83
85
86
--EK1301-9ER
--EK1501-9ER
EK1601-9ER
-83
-84
86
LK1001-9ER
LK1301-9ER
LK1740-9ER 5
LK1501-9ER
LK1601-9ER
79
83
83
84
85
-74, P, D, V 2, K7, T,
B, B1, G
6
5
3
2.5
DK2320-9ER
DK2540-9ER
DK2660-9ER
DK2740-9ER 6
81
83
84
84
EK2320-9ER
EK2540-9ER
EK2660-9ER
---
82
83
84
--
LK2320-9ER
LK2540-9ER
LK2660-9ER
LK2740-9ER 6
81
83
82
83
-74, P, D, T
B, B1, G
Min. efficiency at Vi nom, Io nom and TA = 25 °C. Typical values are approximately 2% better.
Option V for models with 5.1 V outputs; excludes option D
Second output semi-regulated
AK, BK, FK models are available as -7 or -9, but without opt. E. The other models CK, DK, EK, LK are available as -7 or -9E (but not -7E).
Battery loader for 12 V batteries. Vo is controlled by the battery temperature sensor (see Accessories) within 12.62 – 14.12 V. Options
P and D are not available.
Battery loader for 24 V (and 48 V batteries with series-connected outputs). Vo is controlled by the battery temperature sensor (see
Accessories) within 25.25 – 28.25 V (50.5 – 56.5 V for 48 V batteries). Options P and D are not available.
Option K is available only for 5.1 V output in order to avoid the connector with high current contacts. Efficiency is approx. 1.5% worse.
NFND: Not for new designs
BCD20002-G Rev AC, 31-Jan-2014
Preferred for new designs
MELCHER
The Power Partners.
Page 2 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Part Number Description
Operating input voltage Vi:
8 – 35 VDC ................................................................ AK
14 – 70 VDC .............................................................. BK
20 – 100 VDC ............................................................ FK
28 – 140 VDC ........................................................... CK
44 – 220 VDC .......................................................... DK
67 – 385 VDC ........................................................... EK
100 – 240 VAC (rated voltage) or 88 – 372 VDC ...... LK
CK 2 5 40 -9 E R D3 T B1 G
Number of outputs ......................................................... 1, 2
Nominal voltage of output 1 (main output) Vo1 nom
5.1 V ..................................................................... 0, 1, 2
12 V ............................................................................ 3
15 V ........................................................................ 4, 5
24 V ............................................................................ 6
Other voltages 1 ....................................................... 7, 8
Nominal voltage of output 2 Vo2 nom
None (single-output models) .................................... 01
12 V, 12 V ................................................................... 20
15 V, 15 V ................................................................... 40
24 V, 24 V ................................................................... 60
Other specifications or additional features 1 ..... 21 – 99
Operational ambient temperature range TA:
–25 to 71 °C ............................................................... -7
– 40 to 71 °C ............................................................... -9
Other 1 ............................................................... -0, -5, -6
Auxiliary functions and options:
Inrush current limitation ............................................ E 2
Output voltage control input ....................................... R 3
Potentiometer (output voltage adjustment) .............. P 3
Vi / Vo monitor (D0 – DD, to be specified 1) ............... D 4
ACFAIL signal ............................................................ V 4
Current share control .................................................. T
H15 standard connector for 5.1 V output models ..... K 5
Cooling plate standard case ............................ B or B1
Cooling plate for long case 220 mm 1 .................... B2 1
RoHS-compliant for all 6 substances 6 .............................. G 6
1
2
3
4
5
6
Customer-specific models
Option E is mandatory for all -9 models, except AK, BK, FK.
Feature R excludes option P and vice versa. Option P is not available for battery charger models.
Option D excludes option V and vice versa; option V is available for single-output models with 5.1 V only.
Option K is available for single-output models with 5.1 V output to avoid the expensive H15-S4 connector.
G is always placed at the end of the part number; preferred for new designs.
Note: The sequence of options must follow the order above.
Example: CK2540-9ERD3T B1G: DC-DC converter, operating input voltage range 28 – 140 VDC, 2 electrically isolated
outputs, each providing 15 V, 5 A, input current limiter E, control input R to adjust the output voltages, undervoltage
monitor D3, current share feature T, cooling plate B1, and RoHS-compliant for all six substances.
Product Marking
Basic type designation, applicable approval marks, CE mark,
warnings, pin designation, patents and company logo,
identification of LEDs, test sockets, and potentiometer.
BCD20002-G Rev AC, 31-Jan-2014
Specific type designation, input voltage range, nominal output
voltages and currents, degree of protection, batch no., serial
no., and data code including production site, modification
status (version), and date of production.
MELCHER
The Power Partners.
Page 3 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Functional Description
The input voltage is fed via an input fuse, an input filter, a
bridge rectifier (LK models only), and an inrush current limiter
to the input capacitor. This capacitor sources a singletransistor forward converter with a special clamping circuit
and provides also the power during the hold-up time.
Each output is powered by a separate secondary winding of
the main transformer. The resultant voltages are rectified and
their ripple smoothed by a power choke and an output filter.
The control logic senses the main output voltage Vo1 and
generates, with respect to the maximum admissible output
currents, the control signal for the switching transistor of the
forward converter.
The second output of double-output models is tracking the
main output, but has its own current limiting circuit. If the main
output voltage drops due to current limitation, the second
output voltage will fall as well and vice versa.
Standard models with a single 5.1 V output have a synchronous rectifier to provide good efficiency.
03057b
26
Vi+
28
18 i
20 D/V
4
Ci +
4
CY
22 T
12 S+
4
Vo–
10
30
Vi– 32
14 S–
CY
Fig. 1
Block diagram of single-output converters
2
3
4
8
CY
3
24
1
Vo+
6
Output
filter
Forward converter
(approx. 120 kHz)
Fuse
1
Bridge
rectifier 4
Input filter
2
L
16 R
CY
Control circuit
4
N
Opt. P
–
+
Transient suppressor (VDR)
Suppressor diode (AK, BK, FK models)
Inrush current limiter (NTC, only for models with TA min = –25 °C ) or option E (for CK, DK, EK, LK models only)
LK models only
03058b
Opt. P
18 i
CY
Vi+ 28
4
20 D
4
Vi–
Forward converter
(approx. 120 kHz)
22 T
CY
CY
12 Vo1+
14 Vo1–
CY
4
3
6
Output 2
filter
L
Ci +
Bridge
rectifier 4
Fuse
1
Input filter
2
Output 1
filter
4
16 R
Control circuit
N
26
30
32
CY
8
CY
10
24
Fig. 2
Block diagram of double-output models
1
2
3
4
Vo2+
–
Vo2–
+
Transient suppressor (VDR)
Suppressor diode (AK, BK, FK models)
Inrush current limiter (NTC, only for models with TA min = –25 °C ) or option E (for CK, DK, EK, LK models only)
LK models only
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 4 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Electrical Input Data
General Conditions
– TA = 25°C, unless TC is specified.
– Pin 18 connected to pin 14, Vo adjusted to Vo nom (if option P); R input not connected.
– Sense line pins S+ and S– connected to Vo+ and Vo– respectively.
Table 2a: Input data
Input
AK
Characteristics
Conditions
min
8
typ
BK
max
min
35
14
Vi
Operating input voltage
V i nom
Nominal input voltage
Io = 0 – Io nom
TC min –TC max
Ii
Input current
Vi nom, Io nom 1
Pi 0
No-load input power
Vi min – Vi max
2.5
P i inh
Idle input power
unit inhibited
1.5
Ri
Input resistance
TC = 25 °C
R NTC
NTC resistance 2
Ci
Input capacitance
V i RFI
Conducted input RFI
9.0
70
20
VDC
2.5
2.5
W
1.5
1.5
3.75
A
70
300
mΩ
no NTC
370
1200 1500
A
A
µF
B
A
40
Unit
max
100
no NTC
1040
0
typ
50
100
A
Input voltage limits
without damage
min
6.0
65
832
max
30
no NTC
Radiated input RFI
V i abs
15
EN 55022
V i nom, I o nom
FK
typ
A
0
84
0
100
VDC
Table 2b: Input data
Input
CK
Characteristics
Vi
Conditions
Operating input voltage Io = 0 – Io nom
TC min – TC max
min
typ
28
DK
max min
140
typ
44
EK
max
min
220
67
typ
LK
max min
385
typ
Unit
max
88
372
VDC
85 4
(230) 264 4
VAC
60
110
220
310 4
VDC
3.0
1.6
0.8
0.57
A
V i nom
Nominal input voltage
Ii
Input current
Vi nom, Io nom 1
Pi 0
No-load input power
Vi min – Vi max
2.5
2.5
2.5
2.5
P i inh
Idle input power
unit inhibited
1.5
1.5
1.5
4.5
Ri
Input resistance
TC = 25 °C
R NTC
NTC resistance 2
Ci
Input capacitance
V i RFI
Conducted input RFI
Radiated input RFI
V i abs
1
2
3
4
150
170
1000
960
EN 55022
V i nom, I o nom
Input voltage limits
without damage
0
180
2000
1200
264
480
4000
330
216
mΩ
4000
270
216
270
B
B
B
B
A
A
A
A
154
0
400 3
0
W
400
–400
µF
400
VDC
Both outputs of double-output models are loaded with Io nom.
Valid for -7 versions without option E (-9 versions exclude NTC). This is the nominal value at 25 °C and applies to cold converters at initial
switch-on cycle. Subsequent switch-on/off cycles increase the inrush current peak value.
For 1 s max.
Rated input voltage range is 100 – 240 VAC (nominal 230 VAC). Nominal frequency range is 50 – 60 Hz; operating frequency range is
47 – 440 Hz (440 Hz for 115 V mains). For frequencies ≥ 63 Hz, refer to Installation Instructions.
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 5 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Input Transient Protection
Inrush Current Limitation
A suppressor diode or a VDR (depending upon the input
voltage range) together with the input fuse and a symmetrical
input filter form an effective protection against high input
transient voltages which, typically occur in most installations,
but especially in battery-driven mobile applications.
The CK, DK, EK, and LK models incorporate an NTC resistor
in the input circuitry, which at initial turn-on reduces the peak
inrush current value by a factor of 5 – 10, such protecting
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.
Standard nominal battery voltages are: 12, 24, 36, 48, 60, 72,
110, and 220 V. Railway batteries are specified with a tolerance
of –30% to +25%, with short excursions up to ± 40%.
In certain applications, additional surges according to RIA 12
are specified. The power supply must not switch off during
these surges, and since their energy can practically not be
absorbed, an extremely wide input range is required. The EK
input range for 110 V batteries has been designed and tested
to meet this requirement.
Input Fuse
05109a
Rs ext
+
A fuse mounted inside the converter protects against severe
defects. This fuse may not fully protect the converter, when the
input voltage exceeds 200 VDC. In applications, where the
converters operate at source voltages above 200 VDC, an
external fuse or a circuit breaker at system level should be
installed.
Table 3: Fuse Specification
Fuse type
Reference
AK
BK
CK
DK
EK, LK
FK
fast-blow 1
fast-blow 1
slow-blow 2
slow-blow 2
slow-blow 2
slow-blow 2
Littlefuse 314
Littlefuse 314
Schurter SPT
Schurter SPT
Schurter SPT
Schurter SPT
Fuse size 6.3 × 32 mm
Iinr p
RNTC
Ri
Ci int
Vi source
Fig. 4
Equivalent input ciruit
Static Input Current Characteristic
Model
1
The inrush current peak value (initial switch-on cycle) can be
determined by following calculation; see also fig. 3:
Vi source
Iinr p = ––––––––––––––––
(Rs ext + Ri + RNTC)
2
Rating
30 A, 125 V
25 A, 125 V
12.5 A, 250 V
8 A, 250 V
4 A, 250 V
16 A, 250 V
Ii [A]
20
04044a
10
Fuse size 5 × 20 mm
5
AK
Ii inr [A]
05108a
150
BK
2
FK
CK
1
100
DK
0.5
CK
EK, LK
DK
1
EK
LK (DC input)
2
3
4
5
Vi
____
Vi min
Fig. 5
Typical input current versus relative input voltage
50
Reverse Polarity
0
0.1
1
2
3
t [ms]
Fig. 3
Typical inrush current versus time at Vi max, Rext = 0 Ω.
For AK, BK, FK, and for application-related values, use the
formula in this section to get realistic results.
BCD20002-G Rev AC, 31-Jan-2014
The converters (except LK models) are not protected against
reverse polarity at the input to avoid unwanted power losses. In
general, only the input fuse will trip.
LK models are fully protected by the built-in bridge rectifier.
MELCHER
The Power Partners.
Page 6 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Input Under-/Overvoltage Lockout
If the input voltage remains below approx. 0.8 Vi min or exceeds
approx. 1.1 Vi max, an internally generated inhibit signal
disables the output(s). When checking this function, the
absolute maximum input voltage V i abs should be observed.
Between Vi min and the undervoltage lock-out level the output
voltage may be below the value defined in table Electrical
Output data.
Hold-Up Time
th [ms]
04045a
EK
100
CK/FK
DK
10
AK
BK
1
0.1
1
2
3
4
5
6
Vi
____
Vi min
Fig. 6a
Typical hold-up time t h versus relative DC input voltage.
Vi /Vi min. DC-DC converters require an external series diode
in the input path, if other loads are connected to the same
input supply lines.
th [ms]
04049a
100
10
V
i
_______
2
1
2
3
4
Vi min
Fig. 6b
Typical hold-up time t h versus relative AC input voltage (LK
models)
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 7 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Electrical Output Data
General Conditions:
– TA = 25 °C, unless TC is specified.
– Pin 18 (i) connected to pin 14 (S– or Vo1–), R input not connected, Vo adjusted to Vo nom (option P),
– Sense line pins 12 (S+) and 14 (S–) connected to pins 4 (Vo1+) and 8 (Vo1–), respectively.
Table 5: Output data of single-output models
Model
Nom. output voltage
AK – LK1001
5.1 V
Characteristics
Vo
Conditions
Output voltage
min
Vi nom, Io nom
Vo BR
Overvoltage protection
(suppressor diode) 7
Io nom
Output current nom. 1
Vi min – Vi max
TC min – TC max
IoL
Output current limit
Vi min – Vi max
vo
Output
noise 3
AK – LK1301 / 1740 5
12 V / 12.84 V 5
typ max min
5.07
5.13
typ
11.93 5
max min
12.07 5
15.2/17.5 5
6.0
206/25
typ
14.91
max
min
typ
max
24.14
V
56/6
8.2 6/10.2
10
5
5
5
Total incl. spikes
80
50
70
100
5
A
5.2 6/6.2
Low frequency 8 Vi nom, I o nom
BW = 20 MHz
Switching frequ.
5
Unit
28.5
86/10
10.25 6/12.2
AK – LK1601
24 V
15.09 23.86
19.6
105 6/12
216/26
AK – LK1501
15 V
5
5
mVpp
mV
∆Vo u
Static line regulation
with respect to Vi nom
Vi min – Vi max
Io nom
± 15
±20
±25
±30
∆Vo I
Static load regulation 2
Vi nom
(0.1 – 1) Io nom
–20 2
–30
– 40
– 50
vo d
Dynamic Voltage
Vi nom
load
deviation 9
Io nom ↔ 1/2 Io nom
regulat.9
9
Recovery time
±150
±130
±130
±150
0.3
0.4
0.4
0.3
ms
Temperature coefficient
of output voltage 4
±0.02
±0.02
±0.02
±0.02
%/K
td
α Vo
1
2
3
4
5
6
7
8
9
TC min – TCmax
Io nom
If the output voltages are increased above Vo nom through 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.
See fig. 7 below !
Measured according to IEC/EN 61204 with a probe according to annex A
For battery charger applications, a defined negative temperature coefficient can be provided by using a temperature sensor (see
Accessories), but we recommend choosing the special battery charger models.
Especially designed for battery charging using the temperature sensor (see Accessories). Vo is set to 12.84 V ±1% (R-input open)
Values for AK models
Breakdown voltage of the incorporated suppressor diode (1 mA; 10 mA for 5 V output). Exceeding Vo BR is dangerous for the
suppressor diode.
LK models only (twice the input frequency)
See Dynamic load regulation
∆VoR
Vo [V]
Models with diodes
5.1
Models with synchr.
rectifier
0.15
JM049
1.0
Io/Io nom
Fig. 7
Output voltage regulation for models with synchronous
rectifier and with diode rectifier
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 8 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Table 6a: Output data of double-output models. General conditions as per table 5.
Model
Nom. output voltage
AK – LK2320
2 × 12 V
Output 1
Vo
Vi nom , Io1 nom , I o2 nom 11.93
12.07 11.82
12.18 14.91
15.2
15.2
19.6
Vo BR
Overvoltage protection
(suppressor diode)
Io nom
Output current nom. 2
Vi min – Vi max
TC min – TC max
IoL
Output current limit 10
Vi min – Vi max
vo
Output
noise 3
Low
max min
Output 1
Conditions
Output voltage
typ
Output 2
Characteristics
8
min
AK – LK2540
2 × 15 V
typ max
5 1/6
min
5 1/6
5.2 1/6.2
Output 2
max min
max
15.22
V
19.6
4 1/5
4.2 1/5.2
5
typ
15.09 14.78
41/5
5.2 1/6.2
frequency 9
typ
Unit
A
4.2 1/5.2
Vi nom, Io nom
Switching freq. BW = 20 MHz
5
5
5
5
5
5
5
Total incl. spikes
40
40
50
50
mVpp
∆Vo u
Static line regulation
with respect to Vi nom
Vi min – Vi max
I o nom
±20
5
∆Vo I
Static load regulation
Vi nom
(0.1 – 1) Io nom
–40
5
vo d
Dynamic Voltage
Vi nom,
load
deviation 4
Io1 nom ↔ 1/2 Io1 nom
1
regulat.
Recovery time 4 /2 Io2 nom
±100
0.2
0.2
ms
Temperature coefficient
of output voltage 6
±0.02
±0.02
%/K
td
αVo
TC min – TC max
Io nom
±150
Characteristics
Conditions
Vo
V i nom , I o1 nom , I o2 nom
Vo BR
Output voltage
8
typ
max
23.86 7
min
typ
24.14 7 23.64 7
2
Unit
max
24.36 7
V
Output current
IoL
Output current limit 10
vo
Output Low frequency 9 Vi nom, I o nom
noise 3
Switching freq. BW = 20 MHz
Vi min – Vi max
TC min – TC max
Vi min – Vi max
Total incl. spikes
2.51 7/3
A
5
6
2.71 7/3.2
2.71 7/3.2
5
5
5
5
80
80
mVpp
∆Vo u
Static line regulation
with respect to Vi nom
Vi min – Vi max
Io nom
±30
5
∆Vo I
Static load regulation
Vi nom
(0.1 – 1) Io nom
–60
5
vo d
Dynamic Voltage
Vi nom
Io1 nom ↔ 1/2 Io1 nom
load
deviation 4
1
regulat.
4
Recovery time /2 Io2 nom
±100
0.2
ms
Temperature coefficient TC min – TC max
of output voltage 6
Io nom
±0.02
%/K
αv o
3
28.5/347
2.51 7/3
mV
±150
7
8
9
10
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
mV
±150
4
Io nom
td
5
Output 2
28.5/347
Overvoltage protection
(suppressor diode)
nom.2
min
–50
1
AK – LK2660 / 2740 7
2 × 24 V / 2 × 25.68 V 7
Output 1
5
±100
Table 6b: Output data of double-output models. General conditions as per table 5.
Model
Nom. output voltage
±25
Values for AK models
If the output voltages are
increased above Vo nom via Rinput control, option P setting,
remote sensing, or option T,
the output currents should be
reduced accordingly, so that
Po nom is not exceeded.
Measured according to IEC/EN
61204 with a probe annex A
See Dynamic Load Regulation
See Output Voltage Regulation
of Double-Output Models
For battery charger
applications, a defined
negative temperature
coefficient can be provided by
using a temperature sensor;
see Accessories.
Especially designed for battery
charging using the battery
temperature sensor; see
Accessories.
Vo1 is set to 25.68 V ±1% (Rinput open-circuit).
Breakdown voltage of the
incorporated suppressor
diodes (1 m A). Exceeding
Vo BR is dangerous for the
suppressor diodes.
LK models only (twice the
input frequency)
Both outputs series-connected
Page 9 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Thermal Considerations
If a converter is located in free, quasi-stationary air
(convection cooling) at the indicated maximum ambient
temperature TA max (see table Temperature specifications) and
is operated at its nominal input voltage and output power, the
temperature measured at the Measuring point of case
temperature TC (see Mechanical Data) will approach the
indicated value TC max after the warm-up phase. However, the
relationship between TA and TC depends heavily upon the
conditions of operation and integration into a system. The
thermal conditions are influenced by input voltage, output
current, airflow, and temperature of surrounding components
and surfaces. TA max is therefore, contrary to TC max, an indicative
value only.
Caution: The installer must ensure that under all operating
conditions TC remains within the limits stated in the table
Temperature specifications.
Notes: Sufficient forced cooling or an additional heat sink allows
TA to be higher than 71 °C (e.g., 85 °C), as long as TC max is not
exceeded. Details are specified in fig. 8.
applied overvoltages. Overload at any of the outputs will
cause a shut-down of all outputs. A red LED indicates the
overload condition.
Note: Vo BR is specified in Electrical Output Data. If this voltage
is exceeded, the suppressor diode generates losses and may
become a short circuit.
Parallel and Series Connection
Single- or double-output models with equal output voltage
can be connected in parallel using option T (current sharing).
If the T pins are interconnected, all converters share the
output current equally.
Single-output models and/or main and second outputs of
double-output models can be connected in series with any
other (similar) output.
Notes:
– Parallel connection of double-output models should always
include both, main and second output to maintain good
regulation.
– Not more than 5 converters should be connected in parallel.
– Series connection of second outputs without involving their
main outputs should be avoided, as regulation may be poor.
1.0
– The maximum output current is limited by the output with the
lowest current limitation when several outputs are connected in
series.
05089a
Io /Io nom
0.8
Forced
cooling
Convection cooling
0.6
TC max
Vo/Vo nom
0.4
0.98
0.2
0
TA min
50
60
70
80
90
100
TA [°C]
0.5
Fig. 8
Output current derating versus temperature for -7 and -9
models.
Io1
IoL
Thermal Protection
05098a
0
A temperature sensor generates an internal inhibit signal,
which disables the outputs, when the case temperature
exceeds TC max. The outputs automatically recover, when the
temperature drops below this limit.
Continuous operation under simultaneous extreme worstcase conditions of the following three parameters should be
avoided: Minimum input voltage, maximum output power, and
maximum temperature.
0.5
1.0
Io/Io nom
Fig. 9
Output characteristic Vo versus Io (single-output models or
double-output models with parallel-connected outputs).
Output Protection
Each output is protected against overvoltages, which could
occur due to a failure of the internal control circuit. Voltage
suppressor diodes (which under worst case condition may
become a short circuit) provide the required protection. The
suppressor diodes are not designed to withstand externally
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 10 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Vo
Vo2 [V]
Vod
Vo ±1 %
Vo ±1 %
05106a
15.75
Vod
Io1 = 5.0 A
Io1 = 3.75 A
Io1 = 2.5 A
Io1 = 1.25 A
Io1 = 0.5 A
15.5
td
td
15.25
t
Io /Io nom
15.0
1
14.75
0.5
≥ 10 µs
≥ 10 µs
0
05102c
14.5
t
Fig. 10
Typical dynamic load regulation of Vo.
14.25
14.0
0
Output Voltage Regulation
figure 10 applies to single-output or double-output models
with parallel-connected outputs.
For independant configuration, output 1 is under normal
conditions regulated to Vo nom, irrespective of the output
currents.
Vo2 depends upon the load distribution. If both outputs are
loaded with more than 10% of Io nom, the deviation of Vo2
remains within ± 5% of Vo1. Fig. 11 to 13 show the regulation
depending on load distribution.
Two outputs of a double-output model connected in parallel
behave like the output of a single-output model.
1
2
3
4
5
6
Io2 [A]
Fig. 12
Models with 2 outputs 15 V: Vo2 versus Io2 with various Io1 (typ)
Vo2 [V]
05107a
26
Io1 = 3 A
Io1 = 2 A
Io1 = 1 A
Io1 = 0.5 A
Io1 = 0.3 A
25.5
25
24.5
Note: If output 2 is not used, connect it in parallel with output 1!
This ensures good regulation and efficiency.
24
23.5
Vo2 [V]
05105a
12.6
23
Io1 = 6.0 A
Io1 = 4.5 A
Io1 = 3.0 A
Io1 = 1.5 A
Io1 = 0.6 A
12.4
12.2
0
0.5
1
1.5
2
2.5
3
3.5
Io2 [A]
Fig. 13
Models with 2 outputs 24 V: Vo2 versus Io2 with various Io1 (typ)
12.0
11.8
11.6
11.4
11.2
0
1
2
3
4
5
6
7
Io2 [A]
Fig. 11
Models with 2 outputs 12 V: Vo2 versus Io2 with various Io1 (typ)
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 11 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Auxiliary Functions
Sense Lines (Single-Output Models)
Inhibit for Remote On/Off
The outputs may be enabled or disabled by means of a logic
signal (TTL, CMOS, etc.) applied between the inhibit input i
(pin 18) and pin 14 (S– or Vo1–). In systems with several
converters, this feature can be used to control the activation
sequence of the converters. If the inhibit function is not
required, connect the inhibit pin 18 with pin 14!
Note: If pin 18 is not connected, the output is disabled.
06031a
Vo+
Vi+
Iinh
i 18
Fig. 14
Definition of Vinh and Iinh.
Table 7: Inhibit characteristics
Vinh
Conditions
min
Inhibit
Vo = on Vi min – Vi max
voltage
Vo = off
I inh
Inhibit current
tr
Rise time
tf
Fall time
Iinh [mA]
typ
max
Unit
– 50
0.8
V
2.4
50
Total voltage difference Voltage difference
between sense lines and
between
their respective outputs
Vo– and S–
5.1 V
< 0.5 V
300
>300
>100 2
MΩ
Creepage distances
≥ 3.2
--
--
mm
1
2
3
3
According to EN 50116 and IEC/EN 60950, subassemblies connecting input to output are pre-tested with 5.6 kVDC or 4 kVAC.
Tested at 150 VDC
Input to outputs: 6.4 mm
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 21 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Safety of Operator-Accessible Output Circuits
If the output circuit of a DC-DC converter is operatoraccessible, it shall be an SELV circuit according to the
standard IEC 60950-1.
The following table shows some possible installation
configurations, compliance with which causes the output
circuit of the converter to be an SELV circuit according to IEC
60950-1 up to a configured output voltage (sum of nominal
voltages if in series or +/– configuration) of 36 V.
However, it is the sole responsibility of the installer to assure
the compliance with the rapplicable safety regulations.
≤150 VAC or VDC for AK, BK
≤250 VAC or VDC for CK, DK, EK, FK, LK
Mains
AC-DC
front
end
+
10044a
Fuse
Battery
Fuse
DC-DC
converter
+
SELV
–
≤150 VAC or VDC for AK, BK
≤250 VAC or VDC for CK, DK, EK, FK, LK
Fig. 28
Schematic safety concept.
Use earth connections as per the table below.
Earth connection
Table 16: Safety concept leading to an SELV output circuit
Conditions Front end
DC-DC converter
Result
Types
Measures to achieve the
specified safety status of
the output circuit
Safety status
of the DC-DC
converter
output circuit
≤ 100 V (The
Primary circuit
nominal voltage
between any input
pin and earth can
be up to 150 V AC
or DC)
AK
BK
Double or reinforced
insulation, based on
the mains voltage and 2
(provided by the DC-DC
converter) and earthed
case 3
SELV circuit
≤ 400 V (The
nominal voltage
between any input
pin and earth can
be up to 250 V AC
or 400 V DC)
CK
DK
EK
FK
Nominal
supply
voltage
Minimum required grade
of insulation, to be provided by the AC-DC front
end, including mains
supplied battery charger
Nominal DC
output voltage
from the front end
Mains
≤150 V AC
Functional (i.e. there is
no need for electrical
insulation between the
mains supply voltage
and the DC-DC converter
input voltage)
Mains
≤ 250 V AC
Basic
Double or reinforced
1
2
3
4
≤400 V
Minimum required
safety status of the
front end output
circuit
Unearthed
hazardous voltage
secodary circuit
AK
BK
CK
DK
EK
FK
Supplementary insulation,
based on 250 V AC and
double or reinforced
insulation 2 (provided by
DC-DC converter) and
earthed case 3.
Earthed
hazardous voltage
secondary circuit
Double or reinforced
insulation 2 (provided by
the DC-DC converter)
earthed case 3
≤60 V
SELV circuit
Functional insulation
(provided by the DC-DC
converter) 4
≤120 V
TNV-3 circuit
Basic insulation (provided
by the DC-DC converter) 4
The front end output voltage should match the specified input voltage range of the DC-DC converter.
Based on the maximum nominal output voltage from the front end.
The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950-1.
Earthing of the case is recommended, but not mandatory.
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 22 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
If the output circuit of an AC-DC converter is operatoraccessible, it shall be an SELV circuit according to standard
IEC 60950-1.
10021a
Mains
~
~
Fuse
Fuse
+
AC-DC
converter
The following table shows some possible installation
configurations, compliance with which causes the output
circuit of LK models to be SELV according to IEC 60950-1 up
to a configured output voltage (sum of nominal voltages if in
series or +/– configuration) of 36 V.
If the LK converter is used as DC-DC converter, refer to the
previous section.
SELV
–
Earth
connection
Fig. 29
Schematic safety concept. Use earth connection as per
table 17. Use fuses if required by the application; see also
Installation Instructions.
Table 17: Safety concept leading to an SELV output circuit
Conditions
AC-DC converter
Installation
Result
Nominal voltage
Grade of insulation
between input and output
provided by the AC-DC converter
Measures to achieve the resulting
safety status of the output circuit
Safety status of the AC-DC
converter output circuit
Mains
≤ 250 VAC
Double or reinforced
Earthed case1 and installation
according to the applicable standards
SELV circuit
1
The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC/EN 60950.
Description of Options
Table 18: Survey of options
Option
Function of option
Characteristic
-7
Extended operational ambient temperature range
TA = – 25 to 71 °C
E
Electronic inrush current limitation circuitry
Active inrush current limitation
P2
Potentiometer for fine adjustment of output voltage
Adjustment range +10/ – 60% of Vo nom, excludes R input
D1
Input and/or output undervoltage monitoring circuitry
Safe data signal output (D0 – DD)
V1
Input and/or output undervoltage monitoring circuitry
ACFAIL signal according to VME specifications (V0, V2, V3)
T
Current sharing
Interconnect T-pins for parallel connection (max 5 converters)
K
Standard H15 Connector
H15 standard connector instead H15-S4 for models with Vo = 5.1 V)
B, B1, B2
Cooling plate (160 or 220 mm long)
Replaces the standard heat sink, allowing direct chassis-mounting
G
RoHS-compliant for all 6 sibstances
Replaces standard heat sink, allowing direct chassis-mounting
1
2
Option D excludes option V and vice versa; option V only for 5.1 V outputs.
Option P is not available for battery charger models.
-7 Temperature Range
E Inrush Current Limitation
Option -7 designates converters with an operational ambient
temperature range of – 25 to 71 °C. Not for new designs.
CK/DK/EK/LK models may be supplemented by an electronic
circuit (option E, replacing the standard built-in NTC resistor)
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 23 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
to achieve an enhanced inrush current limiting function (not
available with AK/BK/FK types). Option E is mandatory for all
CK/DK/EK/LK models with option -9.
Option D6 should be adjustded with the potentiometer to a
threshold of 36 – 40.5 V for 48 V batteries and to 44 – 50 V for
60 V batteries. Refer also to the description of option D.
10017b
Ci
FET
Rs
Note: Subsequent switch-on cycles at start-up are limited to max.
10 cycles during the first 20 seconds (cold converter) and then to
max. 1 cycle every 8 s.
Converter
Input Filter
LK models
Control
monitor) meet the standard ETS 300132-2 for 48 VDC
supplies. Option D6 is necessary to disable the converter at
low input voltage, such avoiding an excessive input current.
Connect output D (pin 20) with inhibit (pin 18).
LK models powered by 230 VAC/ 50 Hz exhibit an inrush
current as per the fig. below, when switched on at the peak of
Vi. In this case, the inrush current I inr p is 21.7 A and its duration
tinr is 5 ms. This is the worst case.
RSt
If the LK converter is switched on in a different moment, Iinr p is
much lower, but t inr rises up to 10 ms.
Fig. 30
Block diagram of option E
Current limiting resistance Rv = Rs + RSt = 15 Ω
The figure below shows two consecutive peaks of the inrush
current, the first one is caused by Vi /Rv and the second one by
the rising current across the FET. The shape of the curve
depends on model, but the tables below show the higher of
both peaks.
CK models fitted with option E and option D6 (input voltage
Ii [A]
20
15
Capacitor Ci
fully charged
10
Table 19 a: Inrush current at Vi nom (DC supply) and I o nom
Normal operation
(FET fully conducting)
5
Characteristics
CK
DK
EK
LK
Unit
Vi nom Input voltage
60
110
220
310
V
I inr p
Peak inrush current
6.5
7.4
14.6
21
A
t inr
Inrush current duration
25
14
16
12
ms
0
–5
–10
tinr
Table 19 b: Inrush current at Vi max (DC supply) and I o nom
Characteristics
CK
DK
EK
LK
Unit
Vi nom Input voltage
140
220
385
372
V
14.5 25.7 24.8
A
I inr p
Peak inrush current
t inr
Inrush current duration
Iinr [A]
9
30
Capacitor Ci
fully charged
Vi /Rv
14
12
Normal operation
(FET fully conducting)
11039a
0
tinr
t [ms]
Fig. 30
Inrush current with option E (DC supply)
2 different wafe shapes depending on model
BCD20002-G Rev AC, 31-Jan-2014
ms
0
20
40
60
t [ms]
80
Fig. 32
Inrush current for LK models with option E (AC supply)
Vi = 230 VAC, f i = 50 Hz, Po = Po nom
P Potentiometer
Ii = Pi /Vi
0
12
10065a
–15
A potentiometer provides an output voltage adjustment range
of +10/– 60% of Vo nom. It is accessible through a hole in the
front cover. Option P is not available for battery charger
models and is not recommended for converters connected in
parallel.
Option P excludes the R-function. With double-output models,
both outputs are influenced by the potentiometer setting
(doubling the voltage, if the outputs are in series).
Note: If the output voltages are increased above Vo nom via R input
control, option P setting, remote sensing, or option T, the output
current(s) should be reduced, so that Po nom is not exceeded.
MELCHER
The Power Partners.
Page 24 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
T Current Sharing
11037b
This option ensures that the output currents are
approximately shared between all parallel-connected
converters, hence increasing system reliability. To use this
facility, simply interconnect the T pins of all converters and
make sure that the reference for the T signal, pin 14 (S– or
Vo1–), are also connected together. The load lines should
have equal length and cross section to ensure equal voltage
drops.
Vo2–
Converter
T
Vo1+
Vo1–
Load
Not more than 5 converters should be connected in parallel.
The R pins should be left open-circuit. If not, the output voltages
must be individually adjusted prior to paralleling within 1 to 2%
or the R pins should be connected together.
Vo2+
Vo2–
Converter
T
Vo1+
Note: Parallel connection of converters with option P is not recommended.
Vo+
Power bus
+
–
Vo2+
Vo1–
11003a
Load
Max. 5 converters in parallel connection
Vo–
Fig. 35
Parallel connection of double-output models with the
outputs connected in series, using option T.
The signal at the T pins is referenced to Vo1–.
Vo+
Vo–
Vo+
Vo–
D Undervoltage Monitor
Fig.33
Example of poor wiring for parallel connection (unequal
length of load lines)
11036b
Vo+
2
1
S+
Converter
T
1
S–
Option D exists in various versions D0 – DD, as shown in
table 21. D0 and D9 are adjusted according to customer’s
request and receive a customer-specific model number.
Vo–
Load
Vo+
2
T
JFET output (D0 – D4):
Pin D is internally connected via the drain-source path of a
JFET (self-conducting type) to the negative potential of output
S+
Converter
The input and/or output undervoltage monitor operates independently of the built-in input undervoltage lockout circuit. A
logic "low" signal (output with self-conducting JFET) or "high"
signal (NPN open-collector output) is generated at the D
output (pin 20), when one of the monitored voltages drops
below the preselected threshold level V t. This signal is
referenced to S– / Vo1–. The D output recovers, when the
monitored voltages exceed Vt + Vh. The threshold levels Vti
and Vto are either adjusted by a potentiometer, accessible
through a hole in the front cover, or adjusted in the factory to a
fixed value specified by the customer.
1
S–
Vo–
11006a
Vo+/Vo1+
1
Max. 5 converters in parallel connection
Input
1 Lead lines should have equal length and cross
section, and should run in the same cable loom.
2 Diodes recommended in redundant operation only
Fig. 34
Parallel connection of single-output models using option T
with the sense lines connected at the load
BCD20002-G Rev AC, 31-Jan-2014
Rp
ID
Self-conducting
junction FET
20
D
VD
14
S–/Vo1–
Fig. 36
Option D0 – D4: JFET output, I D ≤ 2.5 mA
MELCHER
The Power Partners.
Page 25 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Table 20: Undervoltage monitoring functions
Output type
JFET
NPN
2
3
4
5
Minimum adjustment range
of threshold level Vt
Vto
Vti
Typ. hysteresis Vho [% of Vt ]
for Vt min – Vt max
Vhi
Vho
Number of
potentiometers
D1
D5
no
yes
--
3.5 V – Vo BR 1
--
2.5 – 0.6 V
1
D2
D6
yes
no
Vi min – Vi max 1
--
3.4 – 0.4 V
--
1
D3
D7
yes
yes
Vi min – Vi max 1
(0.95 – 0.985 Vo) 2
3.4 – 0.4 V
"0"
1
2
D4
D8
no
yes
--
(0.95 – 0.985 Vo)
--
"0"
--
D0 5
D9 5
no
yes
--
3.5 V – Vo BR V 3
--
2.5 – 0.6 V
--
yes
no
Vi min – Vi max 3 4
--
-1
Monitoring
Vi
Vo or Vo1
DD
34
3.5 V – Vo BR
3.4 – 0.4 V
--
V3 4
3.4 – 0.4 V
2.5 – 0.6 V
yes
yes
Vi min – Vi max
yes
yes
Vi min – Vi max 3 4
(0.95 – 0.985 Vo) 2
3.4 – 0.4 V
"0"
yes
yes
Vi min – Vi max 1
3.5 V – Vo BR V 1
3.4 – 0.4 V
2.5 – 0.6 V
2
Threshold level adjustable by potentiometer; see Electrical Output Data for Vo BR.
Fixed value. Tracking if Vo/Vo1 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). See Electrical Output
Data for Vo BR.
Adjustment at Io nom.
Customer-specific part number
NPN transistor to the negative potential of output 1. VD < 0.4 V
(logic low) corresponds to a monitored voltage level (Vi and/or
Vo1) > Vt + Vh. The current ID through the open collector should
not exceed 20 mA. The NPN output is not protected against
external overvoltages. VD should not exceed 40 V.
Table 21: JFET output (D0 -- D4)
Vb, Vo1 status
D output, VD
Vb or Vo1 < Vt
low, L, VD ≤ 0.4 V at I D = 2.5 mA
Vb and Vo1 > Vt + Vh
high, H, I D ≤ 25 µA at VD = 5.25 V
Threshold tolerances and hysteresis:
1. VD ≤ 0.4 V (logic low) corresponds to a monitored voltage
level (Vi and/or Vo1) Vt + Vh
low, L, VD ≤ 0.4 V at I D = 20 mA
BCD20002-G Rev AC, 31-Jan-2014
Vi
Fig. 38
Definition of Vti, ∆Vt i and ∆Vhi (JFET output)
MELCHER
The Power Partners.
Page 26 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Table 23: D-output logic signals
Version of D
Vi < Vt or Vo < Vt
Vi > Vt + Vh or Vo > Vt
Configuration
D1, D2, D3, D4, D0
low
high
JFET
D5, D6, D7, D8, D9, DD
high
low
NPN
Input voltage monitoring
NPN
VD
VD high
11008a
3
VD low
3
3
3
t
0
ID
ID high
ID low
0
t
JFET VD
VD high
VD low
0
t
th1
Vo1
Vo1 nom
1
0.95
tlow min4
tlow min4
tlow min4
thigh min
th1
t
0
Vi [VDC]
Vti+Vhi
Vti
t
0
Input voltage failure
Input voltage sag
Switch-on cycle
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
NPN
VD
VD high
2
3
3
VD low
t
0
ID
1 Hold-up time see Electrical Input Data
2 With output voltage monitoring, hold-up time t = 0
h
3 The signal remains high, if the D output is connected
ID high
ID low
0
t
to an external source
4 t
l ow min = 100 – 170 ms, typ. 130 ms
JFET VD
VD high
VD low
0
t
tlow min4
Vo1
Vo1 nom
Vto+Vho
Vto
t
0
Output voltage failure
Fig. 39
Relationship between Vi, Vo, V D, Vo /Vo nom versus time
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 27 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Table 24: Option V: Factory potentiometer setting of Vti with resulting hold-up time
Model
AK
BK
FK
CK
Vt i
9.5
19.5
39
39
th
0.1
0.1
3.4
1.1
V ACFAIL signal (VME)
Available for units with Vo nom = 5.1 V only.
This option defines an undervoltage monitoring circuit for the
input or for the input and main output voltage ( 5.1 V) similar to
option D and generates an ACFAIL signal (V signal), which
conforms to the VME standard.
The low state level of the ACFAIL signal is specified at a sink
current of I V ≤ 48 mA to V V ≤ 0.6 V (open-collector output of an
NPN transistor). The pull-up resistor feeding the opencollector output should be placed on the VME back plane.
After the ACFAIL signal has gone low, the VME standard
requires a hold-up time t h 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 t h is provided by the internal input capacitance.
Consequently the working input voltage and the threshold
level V ti should be adequately above Vi min of the converter, so
that enough energy is remaining in the input capacitance. If V i
is below the required level, an external hold-up capacitor
(C i ext) should be added; refer to the formulas below:
Vt i =
1
EK
LK
Unit
61
97
120
VDC
1.1
2.7
4.2
ms
Note: Option V2 and V3 can be adjusted by the potentiometer to
a threshold level between Vi min and Vi max. A decoupling diode
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.
Option V operates independently of the built-in input undervoltage lockout circuit. A logic "low" signal is generated at pin
20, as soon as one of the monitored voltages drops below the
preselected threshold level V t. The return for this signal is
S–. The V output recovers, when the monitored voltages
exceed V t + Vh . The threshold level V t i is either adjustable by a
potentiometer, accessible through a hole in the front cover, or
adjusted in the factory to a determined customer-specific
value. Refer to table 26.
V output (V0, V2, V3):
Pin V is internally connected to the open collector of an NPN
transistor. The emitter is connected to S–. V V ≤ 0.6 V (logic
low) corresponds to a monitored voltage level (V i and/or Vo)
Vo nom,
V i min increases proportionally to Vo /Vo nom.
V output, VV
V i or V o1 < V t
low, L, V V ≤ 0.6 V at I V = 50 mA
V i and V o1 > V t + V h
high, H, I V ≤ 25 µA at V V = 5.1 V
voltage at the connector pins by the voltage drop ∆V ti across
the input filter. The threshold level of option V0 is adjusted in
the factury at Io nom and TA = 25 °C. The value of ∆V ti depends
upon the input voltage range (AK, BK, etc.), threshold level V t ,
temperature, and input current. The input current is a function
of input voltage and output power.
Table 25: Undervoltage monitor functions
Option
V2
Monitoring
Vi
V o1
yes
no
4
V i min – V i max 1
1
V3
yes
yes
V i min – V i max
V0
yes
no
V i min – V i max 3 4
yes
1
Minimum adjustment range
of threshold level V t
V ti
V to
yes
V i min – V i max
34
Typical hysteresis Vh [% of V t]
for V t min – V t max
V hi
Vho
-0.95 - 0.985 V o1
2
-0.95 - 0.985 V o1
2
2
3.4 - 0.4
--
3.4 - 0.4
"0"
3.4 - 0.4
--
3.4 - 0.4
"0"
3
Threshold level adjustable by potentiometer.
Fixed value between 95% and 98.5% of Vo1 (tracking).
Adjusted at Io nom.
Fixed value, resistor-adjusted (±2% at 25°C) accord. to customer's specification; individual type number is determined by Power-One.
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 28 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
Vhi
VV high
11023a
Po = 0
V
VV
VV low
S–
Fig. 40
Output configuration of options V0, V2 and V3
Input voltage monitoring
Fig. 41
Definition of Vti, ∆Vti and Vhi
VV high
3
Vi
Vti
tlow min 2
tlow min 2
tlow min 2
VV
Po = Po nom
20
NPN open
collector
14
V2
∆Vti
Po = Po nom
Rp
IV
Input
VV
11009a
Po = 0
Vo+
3
3
11010a
4
4
VV low
t
0
V3
tlow min
tlow min 2
VV
VV high
3
2
3
3
VV low
t
0
th 1
th 1
Vo
5.1 V
4.875 V
2.0 V
0
t
Vi [VDC]
Vti + Vhi
Vti
t
0
Input voltage failure
Input voltage sag
Switch-on cycle
Switch-on cycle and subsequent
input voltage failure
Output voltage monitoring
V2
VV
VV high
4
VV low
4
t
0
V3
tlow min 2
VV
VV high
3
1
3
4
2
3
VV low
0
t
4
Vo
5.1 V
4.875 V
2.0 V
0
VME request: minimum 4 ms
t low min = 40 – 200 ms, typ 80 ms
VV level not defined at Vo < 2.0 V
The V signal drops simultaneously with Vo, if the pull-up
resistor R P is connected to Vo+; the V signal remains
high if R P is connected to an external source.
t
Vi
Vti + Vhi
Vti
t
0
Fig. 42
Relationship between Vb, Vo, VD, Vo /Vo nom versus time
Output voltage failure
BCD20002-G Rev AC, 31-Jan-2014
MELCHER
The Power Partners.
Page 29 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
K Standard H15 Connector
calculated by (η see Model Selection):
Option K is available only for 5.1 V output models in order to
avoid the connector with high current contacts. Efficiency is
approx. 1.5% worse.
B, B1, B2 Cooling Plate
Where a cooling surface is available, we recommend the use
of a cooling plate instead of the standard heat sink. The
mounting system should ensure that the maximum case
temperature TC max is not exceeded. The cooling capacity is
(100% – η)
PLoss = –––––––––– • Vo • Io
η
For the dimensions of the cooling plates, see Mechanical
Data. Option B2 is for customer-specific models with
elongated case (for 220 mm DIN-rack depth).
G RoHS
RoHS-compliant for all six substances.
Accessories
A variety of electrical and mechanical accessories are
available including:
– Front panels for 19" DIN-rack (16 TE / 3U): Schroff
[HZZ00831] or Intermas [HZZ00731].
Please see data sheet Accessories, Front Panels.
– Mating connectors with screw, solder, faston or press-fit
terminals; connector coding clips [HZZ00202]; retention
clips [HZZ01209-G]; retention brackets [HZZ01216-G],
cage clamp adapters [HZZ00144-G]; diverse cable
hoods.
See data sheet Accessories, Mating Connectors.
20 to 30 Ncm
– DIN-rail mounting assemblies [HZZ0615-G]; wall-mounting
plates K02 [HZZ01213-G]. Please see data sheet
Accessories, Mounting Kits.
– Different battery sensors [S-KSMH...] for using a converter
as battery charger. Different cell characteristics can be
selected.
See data sheet Accessories, Temperature Sensors.
Fig. 45
Connector retention brackets HZZ01216-G
– Additional external input and output filters
The Accessories data sheets are listed with each product
series or individual model at www.power-one.com.
Fig. 44
Connector retention
clips to fasten the
H15 connector to the
rear plate; see fig. 27.
HZZ01209-G
consists of 2 clips.
Fig. 43
Different front panels
BCD20002-G Rev AC, 31-Jan-2014
Fig. 46
Cage clamp adapter HZZ00144-G
MELCHER
The Power Partners.
Page 30 of 31
K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
European
Projection
9.8 (0.4")
26 (1.02")
09125a
L
56 (2.2")
adhesive tape
L = 2 m (standard length)
other cable lengths on request
Fig. 49
Battery temperature sensor
Fig. 47
Different cable hoods
Fig. 48
DIN-rail mounting assembly
HZZ00615-G
Table 27: Battery temperature sensors
Battery
voltage
nom. [V]
Sensor
type
Cell
Cell temp. Cable
voltage coefficient length
[V]
[mV/K]
[m]
12
S-KSMH12-2.27-30-2
2.27
– 3.0
2
12
S-KSMH12-2.27-35-2
2.27
– 3.5
2
24
S-KSMH24-2.27-30-2
2.27
– 3.0
2
24
S-KSMH24-2.27-35-2
2.27
– 3.5
2
24
S-KSMH24-2.31-35-0
2.31
– 3.5
4.5
24
S-KSMH24-2.31-35-2
2.31
– 3.5
2
24
S-KSMH24-2.35-35-2
2.35
– 3.5
2
48
S-KSMH48-2.27-30-2
2.27
– 3.0
2
48
S-KSMH48-2-27-35-2
2.27
– 3.5
2
Note: Other temperature coefficients and cable lengths are
available on request.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical
components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written
consent of the respective divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
MELCHER
The Power Partners.
工商网监
湘ICP备2023018690号
