K Series
150 Watt DC-DC and AC-DC Converters
Features
• RoHS lead-free-solder and lead-solder-exempted
products available
• 5 year warranty for RoHS compliant products with an
extended temperature range
• Compliant with EN 50155, EN 50121-3-2
• Fire & smoke according to EN 45545 and NF-F16
(ver. V108 or later; not models with H15-S4 connector)
• Class I equipment
• Extremely 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 & short-circuit proof
• Rectangular current limiting characteristic
• PCBs protected by lacquer
• Very high reliability
111
4.4"
3U
80
3.2"
16 TE
Safety-approved to the latest edition of IEC/EN 60950-1
and UL/CSA 60950-1
168
6.6"
Table of Contents
Description........................................................................................2
Model Selection.................................................................................2
Functional Description.......................................................................5
Electrical Input Data..........................................................................6
Electrical Output Data.......................................................................9
Auxiliary Functions..........................................................................13
Electromagnetic Compatibility (EMC)..............................................17
Immunity to Environmental Conditions............................................19
Mechanical Data..............................................................................20
Safety and Installation Instructions..................................................22
Description of Options.....................................................................26
Accessories.....................................................................................34
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BCD20002-G Rev AG, 19-Jul-2018
K Series
150 W DC-DC and AC-DC Converters
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 switch-on.
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.
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.
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).
Model Selection
Non-standard input/output configurations or special customer adaptations are available on request.
Table 1a: Models AK
Output 1
Output 2
Input Voltage
Efficiency 1
Options
Vo nom
[VDC]
Io nom
[A]
Vo nom
[VDC]
Io nom
[A]
Vi min – Vi max
8 - 35 VDC
η min
[%]
5.1
12
15
24
20
10
8
5
-
-
AK1001-9RG
AK1301-9RG
AK1501-9RG
AK1601-9RG
79
81
83
84.5
-7 ⁴, P, D, V ², T, B, B1, non-G
12
15
24
5
4
2.5
12 3
15 3
24 3
5
4
2.5
AK2320-9RG
AK2540-9RG
AK2660-9RG
79
80.5
80.5
-7 ⁴, P, D, T, B, B1, non-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
3
Second output semi-regulated
4
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).
1
2
NFND: Not for new designs.
Preferred for new designs
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K Series
150 W DC-DC and AC-DC Converters
Table 1b: Models BK, FK, CK
Output 1
Output 2
Input Voltage
Effic.1
Input Voltage
Effic.1
Input Voltage
Effic.1
Options
Vo nom
[VDC]
Io nom
[A]
Vo nom
[VDC]
Io nom
[A]
Vi min – Vi max
14 - 70 VDC
η min
[%]
Vi min – Vi max
20 - 100 VDC
η min
[%]
Vi min – Vi max
28 - 140 VDC
η min
[%]
5.1
12
15
24
25
12
10
6
-
-
BK1001-9RG
BK1301-9RG
BK1501-9RG
BK1601-9RG
80.5
83
84
85
FK1001-9RG
FK1301-9RG
FK1501-9RG
FK1601-9RG
80
82
85
86
CK1001-9RG
CK1301-9RG
CK1501-9RG
CK1601-9RG
80
82
85
86
-7 ⁴, P, D, V ², T, B, B1, non-G
12
15
24
6
5
3
12 3
15 3
24 3
6
5
3
BK2320-9RG
BK2540-9RG
BK2660-9RG
80
82
82
FK2320-9RG
FK2540-9RG
FK2660-9RG
81
83
84
CK2320-9RG
CK2540-9RG
CK2660-9RG
81
84
84
-7 ⁴, P, D, T, B, B1, non-G
Options
Table 1c: Models DK, EK, LK
Output 1
Output 2
Input Voltage
Effic.1
Input Voltage
Effic.1
Input Voltage
Effic.1
Vi min – Vi max
44 - 220 VDC
η min
[%]
Vi min – Vi max
67 - 385 VDC
η min
[%]
Vi min – Vi max
88 - 372 VDC
100 - 240 VAC
η min
[%]
--EK1301-9ERG
--EK1501-9ERG
EK1601-9ERG
83
--84
86
EK2320-9ERG
EK2540-9ERG
EK2660-9ERG
---
82
83
84
---
Vo nom
[VDC]
Io nom
[A]
Vo nom
[VDC]
Io nom
[A]
5.1
12
25
12
10
10
6
-
-
DK1001-9ERG
DK1301-9ERG
DK1740-9ERG 5
DK1501-9ERG
DK1601-9ERG
80
83
83
85
86
6
5
3
2.5
12 3
15 3
24 3
6
5
3
2.5
DK2320-9ERG
DK2540-9ERG
DK2660-9ERG
DK2740-9ERG 6
81
83
84
84
12.84 5
15
24
12
15
24
25.68 6
25.68 3, 6
---
LK1740-9ERG 5
LK1501-9ERG
LK1601-9ERG
79
83
83
84
85
-7 ⁴, P, D, V ², T, B, B1, non-G
LK2320-9ERG
LK2540-9ERG
LK2660-9ERG
LK2740-9ERG 6
81
83
82
83
-7 ⁴, P, D, T, B, B1, non-G
LK1001-9ERG
LK1301-9ERG
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
3
Second output semi-regulated
4
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).
5
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.
6
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.
7
Option K is available only for LK with 5.1 V output in order to avoid the H15S4 connector. Efficiency is approx. 1.5% worse.
1
2
NFND: Not for new designs.
Preferred for new designs
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K Series
150 W DC-DC and AC-DC Converters
Part Number Description
CK 2 5 40 -9 E R D3 T B1 G
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
Number of outputs.............................................................1, 2
Nominal voltage of output 1 (main output) Vo1 nom
5.1 V ..............................................................................0
12 V ..............................................................................3
15 V ..............................................................................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 ........................... G
3
4
5
1
2
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.
Note: The sequence of options must follow the order above. This part number description is descriptive only; it is not intended for creating
part numbers.
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.
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.
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K Series
150 W 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 single-transistor 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
20 D/V
CY
12 S+
4
Vo+
6
Output
filter
Forward converter
(approx. 120 kHz)
3
22 T
Control circuit
Ci +
2
Fuse
4
18 i
CY
1
L
16 R
4
Bridge
rectifier 4
N
26
Vi+
28
Input filter
4
Opt. P
8
CY
Vo–
10
30
Vi– 32
14 S–
CY
24
¹
²
³
⁴
– +
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
Fig. 1
Block diagram of single-output converters
03058b
Opt. P
Vi–
Ci +
Forward converter
(approx. 120 kHz)
22 T
CY
CY
3
30
32
CY
24
¹
²
³
⁴
12 Vo1+
14 Vo1–
4
CY
Output 2
filter
4
20 D
2
Fuse
1
L
18 i
Output 1
filter
4
Control circuit
Vi+ 28
Bridge
rectifier 4
4
16 R
CY
Input filter
N
26
CY
6
8
10
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
Fig. 2
Block diagram of double-output models
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K Series
150 W 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
Model
AK
Characteristics
Conditions
min
8
BK
typ
max
min
35
14
typ
FK
max
min
70
20
typ
Unit
max
Vi
Operating input voltage
Vi nom
Nominal input voltage
Io = 0 – Io max
TC min – TC max
Ii
Input current
Vi nom, I o nom 1
Pi 0
No-load input power
Vi min – Vi max
2.5
2.5
2.5
P i inh
Idle input power
Unit inhibited
1.5
1.5
1.5
Ri
Input resistance
RNTC
NTC resistance 2
Ci
Input capacitance
Vi RFI
Vi abs
Conducted input RFI
Radiated input RFI
15
9.0
832
300
370
1200
mΩ
1500
A
B
A
A
A
40
W
no NTC
A
0
A
70
no NTC
1040
EN 55022,
Vi nom, I o nom
Input voltage limits
without damage
3.75
100
no NTC
VDC
50
6.0
65
TC = 25 °C
100
30
0
84
0
µF
100
VDC
Table 2b: Input data
Model
CK
Characteristics
Conditions
min
typ
28
DK
max
min
140
44
typ
EK
max
min
220
67
typ
LK
max
min
385
88
typ
Unit
max
372
Vi
Operating input voltage
Vi nom
Nominal input voltage
Ii
Input current
Vi nom, I o 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
RNTC
NTC resistance
Ci
Input capacitance
Vi RFI
Vi abs
2
Conducted input RFI
Radiated input RFI
Input voltage limits
without damage
Io = 0 – Io max
TC min – TC max
TC = 25 °C
85
60
110
3.0
EN 55022,
Vi nom, I o nom
0
1200
264
216
270
216
B
B
A
A
A
A
154
0
400 3
0
400
-400
W
mΩ
270
B
VAC
A
4000
B
VDC
VDC
480
4000
330
264
0.57
180
2000
(230)
4
310 4
0.8
170
1000
960
220
1.6
150
4
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.
3
For 1 s max.
4
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.
1
2
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K Series
150 W DC-DC and AC-DC Converters
Input Transient Protection
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.
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
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
Model
Fuse type
Reference
Rating
AK
fast-blow
1
Littlefuse 314
30 A, 125 V
BK
fast-blow 1
Littlefuse 314
25 A, 125 V
FK
slow-blow
2
Schurter SPT
16 A, 250 V
CK
slow-blow 2
Schurter SPT
12.5 A, 250 V
DK
slow-blow 2
Schurter SPT
8 A, 250 V
EK, LK
slow-blow 2
Schurter SPT
4 A, 250 V
1
Fuse size 6.3 × 32 mm
2
Fuse size 5 × 20 mm
Inrush Current Limitation
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.
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)
Ii inr [A]
05108a
150
05109a
100
Rs ext
CK
EK, LK
DK
+
Iinr p
Ri
RNTC
Ci int
Vi source
50
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.
Fig. 4
Equivalent input circuit
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K Series
150 W DC-DC and AC-DC Converters
Static Input Current Characteristics
Ii [A]
20
04044a
10
5
AK
BK
2
FK
CK
1
DK
0.5
EK
LK (DC input)
2
1
3
4
5
Vi
____
Vi min
Fig. 5
Typical input current versus relative input voltage
Reverse Polarity
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.
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
th [ms]
CK/FK
DK
10
AK
BK
10
1
0.1
04049a
100
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.
2
V
1
2
3
4
i
_______
Vi min
Fig. 6b
Typical hold-up time t h versus relative AC input voltage
(LK models)
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K Series
150 W 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
AK – LK1001
AK – LK1301/1740 5
AK – LK1501
AK – LK1601
5.1 V
12 V / 12.84 V 5
15 V
24 V
Nom. output voltage
Characteristics
Conditions
min
Vi nom, Io nom
5.07
Vo
Output voltage
V o BR
Output protection
(suppressor diode) 7
Io nom
Output current nom. 1
Vi min – Vi max
TC min – TC max
Io L
Output current limit
Vi min – Vi max
Vo
Output
noise 3
Low frequency 8
Switching frequ.
Total incl. spikes
typ
max
min
5.13
11.93
6.0
typ
max
12.07
5
15.2/17.5 5
20 6/25
max
min
15.09
23.86
19.6
5
typ
max
24.14
V
28.5
8 6/10
10.2 5, 6/12.2
BW = 20 MHz
typ
14.91
10 5, 6/12
21 6/26
Vi nom, Io nom
min
5
Unit
5 6/6
8.6 6/10.2
A
5.2 6/6.2
5
5
5
10
5
5
5
80
50
70
100
mVpp
∆Vo u
Static line regulation
with respect to Vi nom
Vi min – Vi max
Io nom
±15
±20
±25
±30
∆Vo l
Static load regulation 2
Vi nom
(0.1 – 1) Io nom
-20 2
-30
-40
-50
Vo d
Dynamic
load
regulation 9
td
αvo
Voltage
deviation 9
Recovery
time 9
Temperature coefficient of
output voltage 4
Vi nom
Io nom ↔ 0.5 Io nom
Io nom
TC min – TC max
mV
±150
±130
±130
±150
0.3
0.4
0.4
0.3
ms
±0.02
±0.02
±0.02
±0.02
%/K
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.
2
See fig. 7 below !
3
Measured according to IEC/EN 61204 with a probe according to annex A
4
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.
5
Especially designed for battery charging using the temperature sensor (see Accessories). Vo is set to 12.84 V ±1% (R-input open)
6
Values for AK models
7
Breakdown voltage of the incorporated suppressor diode (1 mA; 10 mA for 5 V output). Exceeding Vo BR is dangerous for the
suppressor diode.
8
LK models only (twice the input frequency)
9
See Dynamic load regulation
1
∆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
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K Series
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Table 6a: Output data of double-output models. General conditions as per table 5.
Model (Nom. output voltage)
Characteristics
AK – LK2320 (2 x 12 V)
Conditions
typ
min
12.07
11.82
typ
Output 1
max
min
typ
12.18
14.91
min
15.09
14.78
typ
V o BR 8
Output protection
(suppressor diode)
Io nom
Output current nom. 2
Vi min – Vi max
TC min – TC max
Io L
Output current limit 10
Vi min – Vi max
Vo
Output
noise 3
∆Vo u
Static line regulation
with respect to Vi nom
Vi min – Vi max
Io nom
±20
5
±25
5
∆Vo l
Static load regulation
Vi nom
(0.1 – 1) Io nom
-40
5
-50
5
Vo d
Dynamic
load
regulation
15.2
Low frequency 9
Switching frequ.
Total incl. spikes
Voltage
deviation 4
Recovery
time 4
Temperature coefficient of
output voltage 6
15.2
19.6
5 1/6
BW = 20 MHz
A
4.2 1/5.2
5
5
5
5
5
5
5
40
40
50
50
±100
Io nom
TC min – TC max
V
4 1/5
4.2 1/5.2
5
Vi nom, Io nom
Vi nom
Io1 nom ↔ 0.5 Io1 nom
0.5 Io2 nom
4 1/5
5.2 1/6.2
max
15.22
19.6
5 1/6
5.2 1/6.2
Unit
Output 2
max
Output voltage
αvo
11.93
Output 2
max
Vo
td
Vi nom, Io1 nom, Io2 nom
Output 1
min
AK – LK2540 (2 x 15 V)
±150
±100
mVpp
mV
±150
0.2
0.2
ms
±0.02
±0.02
%/K
Table 6b: Output data of double-output models. General conditions as per table 5.
Model (Nom. output voltage)
Characteristics
AK – LK2660 / 2740 (2 × 24 V / 2 × 25.68 V) 7
Conditions
Vo
Output voltage
Vi nom, Io1 nom, Io2 nom
V o BR 8
Output protection
(suppressor diode)
Io nom
Output current nom. 2
Vi min – Vi max
TC min – TC max
Io L
Output current limit
Vi min – Vi max
Output 1
min
typ
23.86 7
max
min
24.14 7
23.64 7
28.5/34 7
10
Low frequency 9
Vi nom, Io nom
typ
V
28.5/34 7
2.5 1, 7/3
2.5 1, 7/3
2.7 /3.2
1, 7
5
5
∆Vo u
Static line regulation
with respect to Vi nom
Vi min – Vi max
Io nom
±30
5
∆Vo l
Static load regulation
Vi nom
(0.1 – 1) Io nom
-60
5
Vo d
Dynamic
load
regulation
td
αvo
Total incl. spikes
Voltage
deviation 4
Recovery
time 4
Temperature coefficient of
output voltage 6
Vi nom
Io1 nom ↔ 0.5 Io1 nom
0.5 Io2 nom
Io nom
TC min – TC max
A
2.7 /3.2
1, 7
Output
noise 3
BW = 20 MHz
max
24.36 7
Vo
Switching frequ.
Unit
Output 2
5
5
80
80
±100
mVpp
mV
±150
0.2
ms
±0.02
%/K
Values for AK models
If the output voltages are increased above Vo 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.
3
Measured according to IEC/EN 61204 with a probe annex A
4
See Dynamic Load Regulation
5
See Output Voltage Regulation of Double-Output Models
6
For battery charger applications, a defined negative temperature coefficient can be provided by using a temperature sensor; see Accessories.
7
Especially designed for battery charging using the battery temperature sensor; see Accessories. Vo1 is set to 25.68 V ±1% (R-input open-circuit).
8
Breakdown voltage of the incorporated suppressor diodes (1 m A). Exceeding Vo BR is dangerous for the suppressor diodes.
9
LK models only (twice the input frequency)
1
2
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K Series
150 W 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.
Io /Io nom
1.0
05089a
0.8
Forced
cooling
Convection cooling
0.6
TC max
0.4
0.2
0
TA min
50
60
70
80
90
100
TA [°C]
Fig. 8
Output current derating versus temperature for -7 and -9 models.
Thermal Protection
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 worst-case conditions of the following three parameters should be avoided:
Minimum input voltage, maximum output power, and maximum temperature.
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 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.
– The maximum output current is limited by the output with the lowest current limitation when several outputs are connected in series.
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K Series
150 W DC-DC and AC-DC Converters
Vo/Vo nom
0.98
0.5
Io1
IoL
05098a
0
1.0
0.5
Io/Io nom
Fig. 9
Output characteristic Vo versus Io (single-output models or double-output models with parallel-connected outputs).
Output Voltage Regulation
Figure 10 applies to single-output or double-output models with parallel-connected outputs.
For independent 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. Figures 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.
Note: If output 2 is not used, connect it in parallel with output 1! This ensures good regulation and efficiency.
Vo
Vo2 [V]
Vod
Vo ±1 %
Vo ±1 %
12.6
12.4
Vod
td
12.2
td
t
Io /Io nom
1
0.5
05105a
Io1 = 6.0 A
Io1 = 4.5 A
Io1 = 3.0 A
Io1 = 1.5 A
Io1 = 0.6 A
12.0
11.8
11.6
11.4
≥ 10 µs
≥ 10 µs
0
05102c
t
Fig. 10
Typical dynamic load regulation of Vo.
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)
Vo2 [V]
Vo2 [V]
05106a
15.75
15.5
15.25
05107a
26
Io1 = 5.0 A
Io1 = 3.75 A
Io1 = 2.5 A
Io1 = 1.25 A
Io1 = 0.5 A
Io1 = 3 A
Io1 = 2 A
Io1 = 1 A
Io1 = 0.5 A
Io1 = 0.3 A
25.5
25
15.0
24.5
14.75
24
14.5
23.5
14.25
14.0
23
0
1
2
3
4
5
6
Io2 [A]
0
Fig. 12
Models with 2 outputs 15 V: Vo2 versus Io2 with various Io1 (typ)
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)
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K Series
150 W DC-DC and AC-DC Converters
Auxiliary Functions
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.
Table 7: Inhibit characteristics
Characteristics
06031a
Conditions
V inh
Inhibit voltage
Iinh
Inhibit current
tr
Rise time
tf
Fall time
V o = on
V o = off
min
Vi min – Vi max
typ
max
-50
0.8
2.4
50
V inh = 0
-400
30
Unit
Vo+
Vi+
V
Iinh
i 18
µA
Vinh
ms
Depending on Io
S–/Vo1– 14
Vi–
Fig. 14
Definition of Vinh and Iinh.
Iinh [mA]
2.0
Vinh = 2.4 V
Vinh = 0.8 V
Vo /Vo nom
1
06032a
1.6
1.2
0.1
0
0.8
Vo = on
0.4
Vo = off
tf
tr
–0.4
t
0
–40
–20
0
20
t
Inhibit
1
0
–0.8
06001
Vinh [V]
40
Fig. 15
Typical inhibit current I inh versus inhibit voltage Vinh
Fig. 16
Output response as a function of inhibit control
Sense Lines (Single Output Models)
Important: Sense lines must always be connected! Incorrectly connected sense lines may activate the overvoltage protection resulting in a
permanent short-circuit of the output.
This feature allows for compensation of voltage drops across the connector contacts and if necessary, across the load lines. We
recommend connecting the sense lines directly at the female connector.
To ensure correct operation, both sense lines (S+, S–) should be connected to their respective power outputs (Vo+ and Vo–), and
the voltage difference between any sense line and its respective power output (as measured on the connector) should not exceed
the following values:
Table 7: Maximum voltage compensation allowed using sense lines
Output voltage
Total voltage difference
between sense lines and
their respective outputs
Voltage difference
between Vo– and S–
5.1 V
< 0.5 V
< 0.25 V
12 V, 15 V, 24 V
< 1.0 V
< 0.25 V
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K Series
150 W DC-DC and AC-DC Converters
Programmable Output Voltage (R-Function)
As a standard feature, the converters offer an adjustable output voltage, identified by letter R in the type designation. The control
input R (pin 16) accepts either a control voltage Vext or a resistor Rext to adjust the desired output voltage. When input R is not
connected, the output voltage is set to Vo nom.
a) Adjustment by means of an external control voltage Vext between pin 16 (R) and pin 14 (S–):
The control voltage range is 0 – 2.75 VDC and allows for an adjustment in the range of approximately 0 – 110% of Vo nom.
Vo
Vext ≈ –––––– • 2.5 V
Vo nom
b) Adjustment by means of an external resistor:
Depending upon the value of the required output voltage, the resistor shall be connected
either: Between pin 16 and pin 14 to achieve an output voltage adjustment range of approximately 0 – 100% of Vo nom.
or: Between pin 16 and pin 12 to achieve an output voltage adjustment range of 100 – 110% of Vo nom.
05074a
Vi+
R
16
14
S–/Vo1–
+
–
Vext
Vi–
Vi+
12
16
14
S+/Vo1+
R
S–/Vo1–
R'ext
Vo2+
4
Vo2+
6
Vo2–
8
Vo2–
10
Vo1+
12
Vo1–
14
R
16
+
06004a
24 V
Vo1 30 V
48 V
Co
–
R'ext
Rext
Rext
Vi–
Fig. 17
Output voltage control for single-output models
Fig. 18
Double-output models:
Wiring of the R-input for output voltages 24 V, 30 V, or 48 V with
both outputs in series. A ceramic capacitor (Co ) across the load
Warnings:
– Vext shall never exceed 2.75 VDC.
– The value of R’ext shall never be less than the lowest value as indicated in table R’ext (for V0 > V0 nom) to avoid damage to the converter!
Notes:
– The R-Function excludes option P (output voltage adjustment by potentiometer).
If the output voltages are increased above Vo nom via R-input control, option P setting, remote sensing, or option T, the output currents should
be reduced, so that Po nom is not exceeded.
– With double-output models, the second output follows the voltage of the controlled main output.
– In case of parallel connection the output voltages should be individually set within a tolerance of 1 – 2%.
Test Sockets
Test sockets (pin diameter 2 mm) for measuring the main output voltage Vo or Vo1 are located at the front of the converter.
The positive test socket is protected by a series resistor (see: Functional Description, block diagrams).
The voltage measured at the test sockets is slightly lower than the value at the output terminals.
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K Series
150 W DC-DC and AC-DC Converters
Table 8a: Rext for Vo < Vo nom; approximate values (Vi nom, Io nom, series E 96 resistors); R’ext = not fitted
Vo nom = 5.1 V
Vo nom = 12 V
Vo [V]
R ext [kΩ]
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.432
0.976
1.65
2.61
3.83
5.76
8.66
14.7
30.1
200
Vo [V] 1
Vo nom = 15 V
R ext [kΩ]
2
3
4
5
6
7
8
9
10
11
4
6
8
10
12
14
16
18
20
22
0.806
1.33
2
2.87
4.02
5.62
8.06
12.1
20
42.2
Vo [V] 1
2
4
6
8
9
10
11
12
13
14
Vo nom = 24 V
R ext [kΩ]
4
8
12
16
18
20
22
24
26
28
0.619
1.47
2.67
4.53
6.04
8.06
11
16.2
26.1
56.2
Vo [V] 1
4
6
8
10
12
14
16
18
20
22
R ext [kΩ]
8
12
16
20
24
28
32
36
40
44
0.81
1.33
2.0
2.87
4.02
5.62
8.06
12.1
20
44.2
Table 8b: R’ext for Vo > Vo nom; approximate values (Vi nom, Io nom, series E 96 resistors); Rext = not fitted
Vo nom = 5.1 V
1
Vo nom = 12 V
Vo [V]
R ’ext [kΩ]
5.15
5.20
5.25
5.30
5.35
5.40
5.45
5.50
432
215
147
110
88.7
75
64.9
57.6
Vo [V] 1
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
13.0
13.2
Vo nom = 15 V
R ’ext [kΩ]
24.2
24.4
24.6
24.8
25.0
25.2
25.4
25.6
26.0
26.4
1820
931
619
475
383
316
274
243
196
169
Vo [V] 1
15.2
15.4
15.6
15.8
16.0
16.2
16.4
16.5
Vo nom = 24 V
R ’ext [kΩ]
30.4
30.8
31.2
31.6
32.0
32.4
32.8
33.0
1500
768
523
392
316
267
232
221
Vo [V] 1
24.25
24.50
24.75
25.00
25.25
25.50
25.75
26.00
26.25
26.40
R ’ext [kΩ]
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
52.5
52.8
3320
1690
1130
845
698
590
511
442
402
383
First column: Vo or Vo1; second column: double-output models with series-connected outputs
Display Status of LEDs
Vo1 > 0.95 to 0.98 Vo1 adj
06002a
OK
i
Io L
Vi uv
Vi min
Vi max Vi ov
Vo1 > 0.95 to 0.98 Vo1 adj
Vi
Vi abs
LEDs “OK ”, “i ” and “Io L” status versus input voltage
Conditions: Io ≤ Io nom, TC ≤ TC max, Vinh ≤ 0.8 V
Vi uv = undervoltage lock-out, Vi ov = overvoltage lock-out
Vo1 < 0.95 to 0.98 Vo1 adj
OK
Io L
Io nom
Io
IoL
i
TC max
LEDs “OK” and “Io L” status versus output current
Conditions: Vi min – Vi max, TC ≤ TC max, Vinh ≤ 0.8 V
TC
LED “i ” versus case temperature
Conditions: Vi min – Vi max , Io ≤ Io nom, Vinh ≤ 0.8 V
Vi inh
LED “i ” versus Vinh
Conditions: Vi min – Vi max, Io ≤ Io nom, TC ≤ TC max
TPTC threshold
Vinh threshold
i
-50 V
LED off
+0.8 V
+2.4 V
LED Status undefined
+50 V
LED on
Fig. 19
LED indicators
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K Series
150 W DC-DC and AC-DC Converters
Battery Charging / Temperature Sensor
All converters with an R-input are suitable for battery charger applications, but we recommend choosing the models especially
designed for this application DK/LK1740 or DK/LK2740; see Model Selection.
For optimal battery charging and life expectancy of the battery an external temperature sensor can be connected to the R-input.
The sensor is mounted as close as possible to the battery and adjusts the output voltage according to the battery temperature.
Depending upon cell voltage and the temperature coefficient of the battery, different sensor types are available, see Accessories.
Cell voltage [V]
2.45
Input
Power
supply
03099d
Vo+
Vo–
Load
R
06139b
2.40
2.35
2.30
2.25
+
–
Temperature sensor
+
Battery
2.20
2.15 Vo safe
2.10
–20
–10
0
10
VC = 2.27 V, –3 mV/K
VC = 2.23 V, –3 mV/K
Fig. 20
Connection of a temperature sensor
20
30
40
50 °C
VC = 2.27 V, –3.5 mV/K
VC = 2.23 V, –3.5 mV/K
Fig. 21
Trickle charge voltage versus temperature for defined temp.
coefficient. Vo nom is the output voltage with open R-input.
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K Series
150 W DC-DC and AC-DC Converters
Electromagnetic Compatibility (EMC)
A metal oxide VDR together with the input fuse and an input filter form an effective protection against high input transient voltages,
which typically occur in most installations. The converters have been successfully tested to the following specifications:
Electromagnetic Immunity
Table 9: Electromagnetic immunity (type tests)
Phenomenon
Standard
Supply related
surge
RIA 12 3
Level
Value
applied
Waveform
3.5 VBat
2/20/2 ms
1.5 VBat
0.1/1/0.1 s
C
960 Vp
10/100 μs
D3
1800 Vp
5/50 μs
3600 Vp
0.5/5 μs
4800 Vp
0.1/1 μs
8400 Vp
0.05/0.1 μs
1800 Vp
5/50 μs
3600 Vp
0.5/5 μs
4800 Vp
0.1/1 μs
8400 Vp
0.05/0.1 μs
A4
B
Direct transients
E
Coupling mode 1
+i/–i
+i/–i, –i/c
F
G
Indirect couples
transients
3
H
J
K
+o/c, –o/c
L
Electrostatic
discharge (to case)
IEC/EN
61000-4-2
Electromagnetic
field
IEC/EN
61000-4-3
45
contact discharge
±8000 Vp
air discharge
±15000 Vp
x6
antenna
7
antenna
20 V/m
1/50 ns
Source
imped.
Test procedure
In
oper.
Perf.
crit. 2
0.2 Ω
1 positive surge
yes
A
5 pos. & 5 neg.
yes
B
10 pos. & 10 neg.
discharges
yes
A
yes
A
yes
A
5Ω
100 Ω
330 Ω
150 pF
AM 80% / 1 kHz
N/A
80 – 1000 MHz
AM 80% / 1 kHz
N/A
1400 – 2100 MHz
20 V/m
10 V/m
800 – 1000 MHz
5 V/m
Electrical fast
transients / burst
Surges
IEC/EN
61000-4-4
IEC/EN
61000-4-5
10 V/m
3
antenna
38
capacitive, o/c
±2000 Vp
4
±i/c, +i/–i
direct
±4000 Vp
±i/c
±2000 Vp
+i/– i
±1000 Vp
39
Conducted
disturbances
IEC/EN
61000-4-6
3 10
i, o, signal wires
Power frequency
magnetic field
IEC/EN
61000-4-8
3 11
-
10 VAC
(140 dBµV)
2100 – 2500 MHz
50% duty cycle,
200 Hz rep. rate
bursts of 5/50 ns;
2.5 / 5 kHz over 15 ms;
burst period: 300 ms
1.2 / 50 µs
AM 80% / 1 kHz
N/A
900 ±5 MHz
yes
A
50 Ω
60 s positive
60 s negative
transients per
coupling mode
yes
A
2Ω
5 pos. & 5 neg.
surges per
coupling mode
yes
A
150 Ω
0.15 – 80 MHz
yes
A
60 s in all 3 axes
yes
A
12 Ω
300 A/m
i = input, o = output, c = case
A = normal operation, no deviation from specs.; B = temporary loss of function or deviation from specs possible
3
RIA 12 covers or exceeds IEC 60571-1 and EN 50155:2017. Surge D corresponds to EN 50155:2017, waveform A; surge G corresponds
to EN 50155:2001, waveform B
4
Only met with extended input voltage range of CS (for 48 V battery) and ES (for 110 V battery) model types. Such CS models are available
on customer’s request. Standard DS models types (on 110 V battery) will shut down during the surge and recover automatically.
5
Exceeds EN 50121-3-2:2015 table 6.3 and EN 50121-4:2016 table 2.4.
6
Corresponds to EN 50121-3-2:2015 table 6.1 and exceeds EN 50121-4:2016 table 2.1.
7
Corresponds to EN 50121-3-2:2015 table 6.2 and EN 50121-4:2016 table 2.2 (compliance with digital communication devices).
8
Corresponds or exceeds EN 50121-3-2:2015 table 4.2 and EN 50121-4:2016 table 4.2.
9
Covers or exceeds EN 50121-3-2:2015 table 4.3 and EN 50121-4:2016 table 4.3.
10
Corresponds to EN 50121-3-2:2015 table 4.1 and EN 50121-4:2016 table 4.1 (radio frequency common mode).
11
Corresponds to EN 50121-4:2016 table 2.3.
1
2
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K Series
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Electromagnetic Emissions
dBµV
PMM 8000 PLUS: Peak, conducted Vi+, QP + AV, 2009-11-20, 13:00 h
DK1601-9ERB1, U i =110 V, U o =24 V I o = 6 A
dBµV
PMM 8000 PLUS: Peak, conducted Vi+, QP + AV, 2009-11-20, 12:35 h
BK1601-9R, U i =30 V, U o =24 V I o = 6 A
JM053
JM052a
80
80
EN 55022 A (qp)
EN 55022 A (av)
60
60
EN 55022 B (qp)
EN 55022 B (av)
40
40
20
20
0
0
0.2
0.5
1
2
5
10
Fig. 22a
Conducted emissions (peak/quasipeak and average) at the
phase input according to EN 55011/32, measured at Vi nom and
Io nom (BK1601-9R). The neutral line performs quite similar.
dBµV/m
50
0.2
0.5
1
2
5
10
Fig. 22b
Conducted emissions (peak/quasipeak and average) at the
phase input according to EN 55011/32, measured at Vi nom and
Io nom (DK1601-9ERB1). The neutral line performs quite similar.
dBµV/m
TÜV-Divina, ESVS 30:R&S, BBA 9106/UHALP 9107:Schwarzb., QP, 2009-11-20
Testdistance 10 m, BK1601-9R, U
i =24 V, U o =24 V I o = 6 A
50
EN 55011 A
TÜV-Divina, ESVS 30:R&S, BBA 9106/UHALP 9107:Schwarzb., QP, 2009-11-20
Testdistance 10 m, DK1601-9ERB1, U
i =110 V, U o =24 V I o = 6 A
EN 55011 A
40
40
JM051
JM050
30
30
300
>100 2
MΩ
---
---
mm
According to EN 50514 and IEC/EN 60950, subassemblies connecting input to output are pre-tested with 5.6 kVDC or 4 kVAC.
2
Tested at 150 VDC
3
Input to outputs: 6.4 mm
1
Leakage Currents
Leakage currents flow due to internal leakage capacitances and Y-capacitors. The current values are proportional to the supply
voltage and are specified in the table below.
Table 15: Earth leakage currents for LK models
Characteristics
Max. leakage current
Class I
Permissible accord. to IEC/EN 60950
3.5
Typ. value at 264 V, 50 Hz
1.43
Unit
mA
LK Models Operated at Greater than 63 Hz
Above 63 Hz, the earth leakage current may exceed 3.5 mA, the maximum value allowed in IEC 60950. Frequencies ≥ 350 Hz
only permitted with Vi ≤ 200 VAC.
The built-in Y-caps are approved for ≤100 Hz. Safety approvals and CB scheme cover only 50 – 60 Hz.
Safety of Operator-Accessible Output Circuits
If the output circuit of a DC-DC converter is operator-accessible, 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
Earth connection
Fig. 28
Schematic safety concept.
Use earth connections as per the table below.
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K Series
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Table 16: Safety concept leading to an SELV output circuit
Conditions
Front end
DC-DC converter
Result
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
Minimum required
safety status of the
front end output
circuit
Types
Measures to achieve the specified
safety status of the output circuit
Safety status
of the DC-DC
converter
output circuit
Mains ≤150 VAC
Functional (i.e. there is
no need for electrical
insulation between
the mains supply
voltage and the DC-DC
converter input voltage)
≤ 100 V
(The nominal voltage between
any input pin and earth can be
up to 150 VAC or DC)
Primary circuit
AK
BK
Double or reinforced insulation,
based on the mains voltage and 2
(provided by the DC-DC converter)
and earthed case 3
SELV circuit
Basic
≤ 400 V
Mains ≤ 250 VAC
≤ 400 V
(The nominal voltage between
any input pin and earth can be
up to 250 VAC or 400 VDC)
CK
DK
EK
FK
Unearthed
hazardous voltage
secondary circuit
Earthed hazardous
voltage secondary
circuit
Double or reinforced
3
4
1
2
AK
BK
CK
DK
EK
FK
Supplementary insulation, based on
250 VAC and double or reinforced
insulation 2 (provided by DC-DC
converter) and earthed case 3.
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.
If the output circuit of an AC-DC converter is operator-accessible, it shall be an SELV circuit according to standard IEC 60950-1.
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.
Mains
~
~
Fuse
Fuse
Earth
connection
10021a
+
AC-DC
converter
SELV
–
Fig. 29
Schematic safety concept. Use earth connection as per table 17. Use fuses if required by the application; see also Instal. 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
SELV circuit
1
The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC/EN 60950.
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K Series
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Description of Options
Table 18: Survey of options
Option
Function of option
Characteristics
-7
Extended operational ambient temperature range
TA = – 25 to 71 °C
E
Electronic inrush current limitation circuitry
Active inrush current limitation
P
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)
V
2
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)
Cooling plate (160 or 220 mm long)
Replaces the standard heat sink, allowing direct chassis-mounting
RoHS-compliant for 5 substances
Tin-lead solder
1
B, B1, B2
non-G
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.
1
2
-7 Temperature Range
Option -7 designates converters with an operational ambient temperature range of – 25 to 71 °C. Not for new designs.
E Inrush Current Limitation
CK/DK/EK/LK models may be supplemented by an electronic circuit (option E, replacing the standard built-in NTC resistor) 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.
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.
Iinr [A]
10017b
Normal operation
(FET fully conducting)
V i / Rv
Ci
Control
FET
Rs
Converter
Input Filter
LK models
Capacitor Ci
fully charged
Ii = Pi / Vi
RSt
0
11039a
t [ms]
tinr
0
Fig. 30
Block diagram of option E
Current limiting resistance Rv = Rs + RSt = 15 Ω
Fig. 31
Inrush current with option E (DC supply)
2 different wave shapes depending on model
Table 19 a: Inrush current at Vi nom (DC supply) and I o nom
Table 19 b: Inrush current at Vi max (DC supply) and I o nom
Characteristics
CK
DK
EK
LK
Unit
Characteristics
CK
EK
LK
Unit
Input voltage
60
110
220
310
V
Vo max
140
220
385
372
V
Iinr p
Peak inrush current
6.5
7.4
14.6
21
A
Iinr p
Peak inrush current
9
14.5
25.7
24.8
A
tinr
Inrush current duration
25
14
16
12
ms
tinr
Inrush current duration
30
14
12
12
ms
Vo nom
Input voltage
DK
CK models fitted with option E and option D6 (input voltage 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).
Option D6 should be adjusted 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.
Note: Subsequent switch-on cycles at start-up are limited to max. 10 cycles during the first 20 s (cold converter) and then to max. 1 cycle every 8 s.
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K Series
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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.
If the LK converter is switched on in a different moment, Iinr p is much lower, but t inr rises up to 10 ms.
Ii [A]
20
15
Capacitor Ci
fully charged
10
Normal operation
(FET fully conducting)
5
0
–5
–10
tinr
–15
0
20
10065a
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
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.
T Current Sharing
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.
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.
Note: Parallel connection of converters with option P is not recommended.
Vo+
Vo–
11003a
Load
Vo+
Vo–
Vo+
Vo–
Fig.33
Example of poor wiring for parallel connection (unequal length of load lines)
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K Series
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11036b
Vo+
11037b
1
2
S+
Vo2+
Vo2–
T
Converter
Power bus
+
–
1
T
Converter
S–
Vo1+
Vo–
Vo1–
Load
Vo+
Load
2
Vo2+
S+
T
Converter
Vo2–
1
T
Converter
S–
Vo–
Vo1+
1
Vo1–
Max. 5 converters in parallel connection
Lead lines should have equal length and cross section, and should run
in the same cable loom.
Diodes recommended in redundant operation only
1
2
Max. 5 converters in parallel connection
Fig. 34
Parallel connection of single-output models using option T
with the sense lines connected at the load
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–.
D Undervoltage Monitor
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.
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.
Output type
Monitoring
Minimum adjustment range of
threshold level Vt
Typ. hysteresis Vho [% of Vt ]
for Vt min – Vt max
Number of
potentiometers
JFET
NPN
Vi
Vo or Vo1
Vt i
Vt o
Vhi
Vho
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
3.4 – 0.4 V
“0”
1
D4
D8
no
yes
---
---
“0”
---
D0 5
D9 5
no
yes
---
3.5 V – Vo BR 3
---
2.5 – 0.6 V
---
yes
no
Vi min – Vi max 3, 4
---
3.4 – 0.4 V
---
yes
yes
Vi min – Vi max 3, 4
3.5 V – Vo BR 3, 4
3.4 – 0.4 V
2.5 – 0.6 V
yes
yes
Vi min – Vi max 3, 4
(0.95 – 0.985 Vo) 2
3.4 – 0.4 V
“0”
yes
yes
3.5 V – Vo BR
3.4 – 0.4 V
2.5 – 0.6 V
---
DD
1
(0.95 – 0.985 Vo)
2
(0.95 – 0.985 Vo) 2
Vi min – Vi max
1
1
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.
3
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.
4
Adjustment at Io nom.
5
Customer-specific part number
1
2
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K Series
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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 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)
Table 22: NPN output (D5 – DD)
Vb, Vo1 status
D output, VD
Vb, Vo1 status
D output, VD
Vb or Vo1 < Vt
low, L, VD ≤ 0.4 V at I D = 2.5 mA
Vb or Vo1 < Vt
high, H, I D ≤ 25 µA at VD = 40 V
Vb and Vo1 > Vt + Vh
high, H, ID ≤ 25 µA at VD = 5.25 V
Vb and Vo1 > Vt + Vh
low, L, VD ≤ 0.4 V at ID = 20 mA
11006a
11007a
Vo+/Vo1+
Vo+/Vo1+
20
Self-conducting
junction FET
Rp
D
NPN open
collector
VD
14
Rp
ID
Input
Input
ID
20
VD
14
S–/Vo1–
Fig. 36
Option D0 – D4: JFET output, I D ≤ 2.5 mA
D
S–/Vo1–
Fig. 37
Option D5 – DD: NPN output, Vo ≤ 40, ID ≤ 2.5 mA
Threshold tolerances and hysteresis:
If Vi is monitored, the internal input voltage after the input filter is measured. Consequently this voltage differs from the voltage at
the connector pins by the voltage drop ∆V ti across the input filter. The threshold levels of the D0 and D9 options are factory adjusted
at nominal output current Io nom and TA = 25 °C. The value of ∆V ti depends upon input voltage range (CK, DK, ..), threshold level Vt,
temperature, and input current. The input current is a function of the input voltage and the output power.
VD
∆Vti
Vhi
11021a
Po = Po nom
Po = 0
Po = 0
Po = Po nom
VD high
VD low
Vi
Vti
Fig. 38
Definition of Vti, ∆Vt i and ∆Vhi (JFET output)
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
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K Series
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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
th1
Vo1
Vo1 nom
1
0.95
t
tlow min4
tlow min4
tlow min4
thigh min
th1
0
t
Vi [VDC]
Vti+Vhi
Vti
0
Input voltage failure
Input voltage sag
Switch-on cycle
t
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
ID high
3 The signal remains high, if the D output is connected
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
Table 24: Option V: Factory potentiometer setting of Vti with resulting hold-up time
Model
AK
BK
FK
CK
DK
EK
LK
Unit
Vt i
9.5
19.5
39
39
61
97
120
VDC
th
0.1
0.1
3.4
1.1
1.1
2.7
4.2
ms
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K Series
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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 VV ≤ 0.6 V (open-collector output of an NPN
transistor). The pull-up resistor feeding the open-collector 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 th is provided by the internal input capacitance. Consequently the
working input voltage and the threshold level Vti 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 (Ci ext) should be added; refer to
the formulas below:
Vt i =
√
where as:
C i min =
C i ext =
Po =
η
=
t h
=
V i min =
V ti =
2 • Po • (t h + 0.3 ms) • 100
_______________________
+ Vi min2
Ci min • η
2 • Po • (t h + 0.3 ms) • 100
Ci ext = ––––––––––––––––––––––
– Ci min
η • (Vti 2 – Vi min2 )
1
internal input capacitance [mF]; see table 2
external input capacitance [mF]
output power [W]
efficiency [%]
hold-up time [ms]
minimum input voltage [V] 1
threshold level [V]
V i min see Electrical Input Data. For output voltages Vo > Vo nom, Vi min increases proportionally to Vo/Vo nom.
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.
Table 25: Undervoltage monitor functions
Option
Monitoring
Minimum adjustment range of
threshold level Vt
Typical hysteresis Vh [% of Vt ]
for Vt min – Vt max
Vi
Vo or Vo1
Vt i
Vt o
Vhi
Vho
V2
yes
no
Vi min – Vi max 1
---
3.4 – 0.4 V
---
V3
yes
yes
Vi min – Vi max
3.4 – 0.4 V
“0”
V0
yes
no
Vi min – Vi max 3, 4
yes
yes
Vi min – Vi max 3, 4
1
0.95 – 0.985 Vo1
2
--0.95 – 0.985 Vo1 2
3.4 – 0.4 V
---
3.4 – 0.4 V
“0”
Threshold level adjustable by potentiometer.
Fixed value between 95% and 98.5% of Vo1 (tracking).
3
Adjusted at Io nom.
4
Fixed value, resistor-adjusted (±2% at 25°C) accord. to customer’s specification; individual type number is determined by the company.
1
2
Option V operates independently of the built-in input under
voltage 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 Vt 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 (Vi and/or Vo) Vt + Vh
high, H, IV ≤ 25 µA at VV = 5.1 V
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VV high
Vi
Vti
Fig. 41
Definition of Vti, ∆Vti and Vhi
tlow min 2
tlow min 2
tlow min 2
3
Po = Po nom
VV low
S–
Input voltage monitoring
VV
Po = 0
V
Fig. 40
Output configuration of options V0, V2 and V3
V2
11023a
VV
14
Vhi
Po = 0
Input
20
∆Vti
VV high
Rp
IV
NPN open
collector
VV
11009a
Po = Po nom
Vo+
3
3
11010a
4
4
2
2
VV low
t
0
V3
tlow min
VV
VV high
3
tlow min
3
3
VV low
t
0
th
Vo
5.1 V
4.875 V
th 1
1
2.0 V
0
t
Vi [VDC]
Vti + Vhi
Vti
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
t
VV
VV high
tlow min 2
3
1
3
4
2
3
VV low
0
t
Vo
5.1 V
4.875 V
2.0 V
0
4
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
0
Output voltage failure
t
Fig. 42
Relationship between Vb, Vo, VD, Vo /Vo nom versus time
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K Series
150 W DC-DC and AC-DC Converters
K Standard H15 Connector
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 calculated by (η see
Model Selection):
(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.
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K Series
150 W DC-DC and AC-DC Converters
Accessories
A variety of electrical and mechanical accessories are available including:
– Front panels for 19” DIN-rack: Schroff or Intermas,
12 TE / 3U; see fig. 43.
– Mating H15 connectors with screw, solder, faston, or press-fit terminals, code key system and coding wedges HZZ00202-G;
see fig. 44.
– Pair of connector retention clips HZZ01209-G; see fig. 45
– Connector retention brackets HZZ01216-G; see fig. 46
– Cage clamp adapter HZZ00144-G; see fig. 47
– Different cable hoods for H15 connectors (fig. 48):
- HZZ00141-G, screw version
- HZZ00142-G, use with retention brackets HZZ01218-G
- HZZ00143-G, metallic version providing fire protection
– Chassis or wall-mounting plate K02 (HZZ01213-G) for models with option B1. Mating connector (HZZ00107-G) with screw
terminals; see fig. 49
– DIN-rail mounting assembly HZZ0615-G (DMB-K/S); see fig. 50
– Additional external input and output filters
– Different battery sensors S-KSMH... for using the converter as a battery charger. Different cell characteristics can be selected;
see fig. 51, table 27, and Battery Charging / Temperature Sensors.
For additional accessory product information, see the accessory data sheets listed with each product series or
individual model at our web site.
Fig. 44
Different mating connectors
Fig. 43
Different front panels
Fig.45
Connector retention clips to fasten the H15 connector to the
rear plate; see fig. 24. HZZ01209-G consists of 2 clips.
20 to 30 Ncm
Fig. 46
Connector retention brackets HZZ01216-G (CRB-HKMS)
Fig. 47
Cage clamp adapter HZZ00144-G
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K Series
150 W DC-DC and AC-DC Converters
Fig. 48
Different cable hoods
Fig. 49
Chassis- or wall-mounting plate HZZ01213-G (Mounting
plate K02)
European
Projection
9.8 (0.4")
26 (1.02")
09125a
L
56 (2.2")
L = 2 m (standard length)
other cable lengths on request
Fig. 50
DIN-rail mounting assembly HZZ00615-G (DMB-K/S)
adhesive tape
Fig. 51
Battery temperature sensor
Table 27: Battery temperature sensors
Battery
voltage
nom. [V]
Sensor type
Cell
voltage
[V]
Cell temp.
coefficient
[mV/K]
Cable
length
[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 - These products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
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.
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