S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 1 of 28
MELCHER
The Power Partners.
Description
The LS 4000/5000 Series of AC-DC converters represents a
flexible range of power supplies for use in advanced
electronic systems. Features include full power factor
correction, good hold-up time, high efficiency and reliability,
low output voltage noise, and excellent dynamic response to
load/line changes.
The converters are protected against surges and transients
occurring at the source lines. Input over- and undervoltage
lockout circuitry disables the outputs, when the input voltage
is outside of the specified range. Input inrush current limit ation
is included for preventing circuit breakers and fuses from
tripping at switch-on.
All outputs are overload, open- and short-circuit proof and
protected by a built-in suppressor diode. The outputs can be
inhibited by a logic signal applied to connector pin 18. If 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
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 and
built according to the international safety standards IEC/EN
60950-1 2nd Ed. They have been approved by the safety
agencies Nemko and CSA (for USA and Canada).
The case design allows for operation at nominal load up to
71 °C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 71 °C but the
case temperature must remain below 95 °C under all
conditions.
168
6.6"
60
2.4"
12 TE
111
4.4"
3 U
Features
• RoHS lead-free-solder and lead-solder-exempted
products are available
•5 year warranty for RoHS compliant products
with an extended temperature range
•Class I equipment
• Power factor >0.93, harmonics IEC/EN 61000-3-2
•Immunity according to IEC/EN 61000-4-2, -3, -4, -5,
-6, -8, -9
•Compliant with EN 50155, EN 50121-4, EN 45545
(version V108 or later)
•High efficiency
• Input over- and undervoltage lockout
• Adjustable output voltage with remote on/off
•1 or 2 outputs: SELV, no load, overload, and short-
circuit proof
• Rectangular current limiting characteristic
•PCBs protected by lacquer
•Very high reliability
Table of Contents Page Page
Copyright © 2018, Bel Power Solutions Inc. All rights reserved.
Description....................................................................... 1
Model Selection ............................................................... 2
Functional Description..................................................... 4
Electrical Input Data ........................................................ 5
Electrical Output Data ..................................................... 7
Auxiliary Functions ........................................................ 11
Electromagnetic Compatibility (EMC) ........................... 15
Environmental Conditions ............................................. 16
Mechanical Data............................................................ 17
Safety and Installation Instructions ............................... 19
Description of Options................................................... 21
Accessories ................................................................... 27
Safety-approved according to IEC/EN 60950-1, UL/CSA
60950-1 2nd Ed.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 2 of 28
MELCHER
The Power Partners.
An internal temperature sensor generates an inhibit signal,
which disables the outputs, when the case temperature TC
exceeds the limit. The outputs automatically recover, when
the temperature drops below the limit.
Various options including battery chargers are available to
adapt the converters to individual applications.
Model Selection
Non-standard input/output configurations or special customer adaptations are available on request.
The converters may either be plugged into 19" rack systems
according to IEC 60297-3, or be chassis mounted.
Important:
These products are intended to replace the LS1000 and LS2000
models in order to comply with IEC/EN 61000-3-2. For appli-
cations with DC input or main frequencies other than 50/60 Hz,
the LS1000 and LS2000 models are still available.
Table 1: Model types LS
Output 1 Output 2 Oper. input voltage range Efficiency 1Options
Vo nom Io nom Vo nom Io nom Vi min – Vi max ηmin
[VDC] [A] 2 [VDC] [A] 85 – 264 VAC [%]
5.1 16 LS4001-9ERG 77 -7, -7E, P, D 2, V 2, T, B, B1, non-G
12 8 LS4301-9ERG 81 -7, -7E, P, D, T, B, B1, non-G
15 6.5 LS4501-9ERG 83
24 4.2 LS4601-9ERG 83
24 4 LS5320-9ERG 81
30 3.2 LS5540-9ERG 81
48 2 LS5660-9ERG 81
12 4 12 3 4 LS5320-9ERG 81
15 3.2 15 3 3.2 LS5540-9ERG 81
24 2 24 3 2 LS5660-9ERG 81
1Min. efficiency at Vi nom, Io nom and TA = 25 °C. Typical values are approximately 2% better.
2Option V for LS4000 models with 5.1 V output; excludes option D
3Second output semi-regulated
Table 2: Battery charger models
Nom. output values Output voltage range Oper. input voltage range Efficiency 1Options
Vo nom Io nom VoVi min – Vi max ηmin
[VDC] [A] [VDC] 85 – 264 VAC [%]
12.84 7 12.62 – 14.12 LS4740-9ERG 81 -7, -7E, D, T, B, B1, non-G
25.68 23.4 25.25 – 28.25 LS5740-9ERG 81
51.36 31.7 50.5 – 56.5 LS5740-9ERG 81
1Min. efficiency at Vi nom, Io nom and TA=25 °C. Typical values are approximately 2% better.
2Both outputs connected in parallel
3Both outputs connected in series
NFND: Not for new designs Preferred for new designs
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 3 of 28
MELCHER
The Power Partners.
Example: LS5540-9ERD3TB1G: Power factor corrected AC-DC converter, operating input voltage range 85 – 264 VAC,
2 electrically isolated outputs, each providing 15 V, 3.2 A, equipped with inrush current limiter, R-input to adjust the
output voltages, undervoltage monitor D3, current share feature, a cooling plate B1, RoHS-compliant.
Product Marking
Basic type designation, applicable approval marks, CE mark,
warnings, pin designation, patents and product logo,
identification of LEDs, test sockets, and potentiometer.
Part Number Description
Operating in put voltage Vi: 85 – 264 VAC.......................LS
Number of outputs ....................................................... 4, 5
Single output models:
Nominal voltage 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
Other specifications (single output models)1....... 01 – 99
Double output models:
Nominal voltage output 1 and 2
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
Undervoltage monitor (D0 – DD, to be specified) ......D 4
ACFAIL signal (V2, V3, to be specified) ....................V 4
Current share ............................................................... T
Cooling plate standard case .............................. B or B1
Cooling plate for long case 220 mm 1 ........................B2
RoHS-compliant for all 6 substances ..........................G
1Customer-specific models
2Option E mandatory for all -9 models
3Feature R excludes option P and vice versa. Option P is not available for battery charger models.
4Option D excludes option V and vice versa; option V is available for 5.1 V models only.
Note: The sequence of options must follow the order above. This part number description is descriptive only; it is not inteded for
creating part numbers.
LS 5 5 40 -9 E R D3 T B1 G
NFND: Not for new designs Preferred for new designs
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 and date of production.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 4 of 28
MELCHER
The Power Partners.
Fig. 2
Block diagram of double-output models
1Transient suppressor (VDR)
2Inrush current limiter (NTC, only models with TA min = –25 °C ) or option E
3Bulk capacitor Cb; bulk voltage approx. 370 V
Functional Description
The input voltage is fed via an input fuse, an input filter, a
rectifier, and an inrush current limiter to a boost converter.
This step-up converter provides a sinusoidal input current
(IEC/EN 61000-3-2, class D equipment) and charges the bulk
capacitor Ci to approx. 370 VDC. This capacitor sources a
single transistor forward converter and provides 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 to 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.
Fig. 1
Block diagram of single-output models
1Transient suppressor (VDR)
2Inrush current limiter (NTC, only models with TA min = –25 °C ) or option E
3Bulk capacitor Cb; bulk voltage approx. 370 V
Input filter
Control circuit
P
2
16
18
20
22
12
4
6
8
10
14
Output
filter
28
30
32
24
–+
Forward converter (approx. 80 kHz)
+
Boost converter (approx. 100 kHz)
Ci
3
03001c
R
i
D/V
T
S+
Vo+
Vo–
S–
26
N~
L~
1
Bridge retifier
Fuse
CY
CY
CY
CY
Control circuit
P
16
18
20
22
12
14
4
6
8
10
Output 2
filter
Output 1
filter
26
28
30
32
24
–+
03002c
N~
L~
R
i
D
T
Vo1+
Vo1–
Vo2+
Vo2–
C
Y
Input filter
1
Bridge retifier
C
Y
C
Y
Fuse
Forward converter (approx. 80 kHz)
+
Boost converter (approx. 100 kHz)
C
i
3
2
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 5 of 28
MELCHER
The Power Partners.
Electrical Input Data
General Conditions
–TA = 25 °C, unless TC is specified.
– Pin 18 connected to pin 14, R input not connected, Vo adjusted to Vo nom (option P)
– Sense line pins S+ and S– connected to Vo+ and Vo–, respectively.
Table 3: Input data
Input LS Unit
Characteristics Conditions min typ max
ViRated input voltage range Io = 0 – Io nom 100 240 VAC 1
Vi op Operating input voltage range TC min – TC max 85 264
Vi nom Nominal input voltage 50 – 6 0 H z 23 0
IiInput current Vi nom, Io nom 2 0.55 A
Pi0 No-load input power Vi min – Vi max, Io = 0 7.5 9 W
Pi inh Idle input power conv. inhibited 2 3
RiInput resistance 480 mΩ
RNTC NTC resistance (see fig. 3)3conv. not operating 3200 4000
CiInput capacitance 80 100 120 µF
Vi RFI Conducted input RFI EN 55022 B
Radiated input RFI Vi nom, Io nom B
Vi abs Input voltage limits 283 VAC
without damage –400 400 VDC 4
1Nominal frequency range: 50 – 60 Hz, operating frequency range 47 – 63 Hz
2With double-output models, both outputs loaded with Io nom
3Valid for -7 versions without option E. This is the NTC resistance value at 25 °C and applies to cold converters. Subsequent switch-on/
off cycles increase the inrush current peak value.
4Operation with DC input voltage is not specified and not recommended.
Input Transient Protection
A VDR together with the input fuse and a symmetrical input
filter form an effective protection against high input transient
voltages.
Input Fuse
A fuse mounted inside the converter in series to the phase line
protects against severe defects. A second fuse in the neutral
line may be necessary in certain applications; see Installation
Instructions.
Fuse specification:
Slow-blow, 4 A, 250 V, 5 × 20 mm.
Input Under-/Overvoltage Lockout
If the input voltage remains below approx. 65 VAC or exceeds
Vi abs, an internally generated inhibit signal disables the
output(s). Do not check the overvoltage lockout function!
If Vi is below Vi min, but above the undervoltage lockout level,
the output voltage may be below the value specified in the
tables Electrical Output Data.
Inrush Current Limitation
The -7 models without option E incorporate an NTC resistor in
the input circuitry, which at initial turn-on reduces the peak
inrush current value by a factor of 5 to 10 to protect con-
nectors 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.
The inrush current peak value (initial switch-on cycle) can be
determined by following calculation:
Vi • √ 2
––
Iinr p = ––––––––––––––––
(Rs ext + Ri + RNTC)
Fig. 3
Equivalent circuit diagram for input impedance.
Rs ext RiRNTC
Iinr p
Vi Cb
04001b
∼
+
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 6 of 28
MELCHER
The Power Partners.
100 150 200 250 30050
1
3
0.5
1.5
2
2.5
l
i
[A]
V
i
[V]
04005a
Fig. 4
Theoretical input inrush current versus time at Vi = 255 V
and 115 V, Rext = 0 for models without option E
Fig. 5
Input current versus input voltage at Io nom
Fig. 7
Harmonic currents at the input (LS4601, Vi = 230 VAC,
Io = Io nom).
Power Factor and Harmonics
Power factor correction is achieved by controlling the input
current waveform synchronously with the input voltage
waveform. The power factor control is active under all
operating conditions.
The harmonic distortion is well below the limits specified in
IEC/EN 61000-3-2, class D.
Fig. 6
Power factor versus output current (LS4601-7R)
Fig. 8
Typ switching frequency versus load. The boost
converter at the input stage operates with a constant
switching frequency of 100 kHz.
Hold-up Time
Fig. 9
Hold-up time versus output power (LS4601-7R)
0
0.5
1
1.5
2
2.5
3
3.5
4
35791113
Harm-LS4601
mA/W
Harm.
0.1 1ms
50
100
I
inr
[A]
0
04054LS
0.5
LS
0.2 0.4 0.6 0.8 1
0
60
0
10
20
30
40
50
kHz
I
o
/I
o nom
70
80
1.2
05008b
0
20
40
60
80
100
120
140
160
180
0 0.2 0.4 0.6 0.8 Io/Io nom
[ms]
LS4601-hu
V
i
= 230 VAC
V
i
= 85 VAC
0.70
0.75
0.80
0.85
0.90
0.95
1
0 0.2 0.4 0.6 0.8 1 I
o
/I
o nom
Power factor
V
i
= 230 VAC
V
i
= 85 VAC
PF-LS4601
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 7 of 28
MELCHER
The Power Partners.
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 4a: Output data of single-output models
LS4001 LS4301 / 4740
5LS4501 LS4601 Unit
Output 5.1 V 12 V
515 V 24 V
Characteristics Conditions min typ max min typ max min typ max min typ max
VoOutput voltage Vi nom, Io nom 5.07 5.13 11.93512.075 14.91 15.09 23.86 24.14 V
Vo BR Overvoltage protection 7.6 15.2/17
519.6 28.5
(supressor diode)
6
Io nom Output current nom.
1Vi min – Vi max 16 8/7
56.5 4.2 A
TC min – TC max
IoL Output current limit
1 Vi min – Vi max 16.2 8.2/8
56.7 4.4
voOutput Low f r equency Vi nom, Io nom 222 2mV
pp
noise 3 Switch ing f r e qu . BW = 2 0 MH z 10 5 5 5
Total incl. spikes 50 40 40 40
∆Vo u Static line regulation Vi min – Vi max ±5 ±12 ±15 ±24 mV
with respect to Vi nom Io nom
∆Vo I Static load regulation Vi nom –20 –25 –30 –40
(0.1 – 1) Io nom
vo d Dynamic Voltage Vi nom ±100 ±100 ±100 ±100
load deviation 2 Io nom ↔ 1/2 Io nom
t d regulat. 2
Recovery time2
0.3 0.4 0.4 0.3 ms
αvo Temperature coefficient TC min – TCmax ±0.02 ±0.02 ±0.02 ±0.02 %/K
of output voltage 4 Io nom
1If 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.
2See Dynamic load regulation (fig. 13)
3Measured according to IEC/EN 61204 with a probe according to annex A
4For battery charger applications, a defined negative temperature coefficient can be provided by using a temperature sensor (see
Accessories), but we recommend choosing special battery charger models.
5Especially designed for battery charging using the temperature sensor (see Accessories). Vo is set to 12.84 V ±1% (R-input open).
6Breakdown voltage of the incorporated suppressor diode (1 mA; 10 mA for 5 V output). Exceeding Vo BR is dangerous for the suppressor
diode.
Fig. 10
Efficiency versus output power.
Efficiency
0.2 0.4 0.6 0.8 1
0
0.9
0.3
0.4
0.5
0.6
0.7
0.8
Efficiency
I
o
/I
o no
m
V
i
= 230 V
V
i
= 85 V
05014a
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 8 of 28
MELCHER
The Power Partners.
Table 4b: Output data of double-output models
LS5320 LS5540 Unit
Output 2 × 12 V 2 × 15 V
Characteristics Conditions Output 1 Output 2 Output 1 Output 2
min typ max min typ max min typ max min typ max
VoOutput voltage Vi nom, Io nom 1 11.93 12.07 11.82 12.18 14.91 15.09 14.78 15.22 V
Vo P Overvoltage protection 15.2 15.2 19.6 19.6
(supressor diode) 8
Io nom Output current nom 2 Vi min – Vi max 4 4 3.2 3.2 A
TC min – TC max
IoL Output current limit 6 Vi min – Vi max 4.2 4.2 3.4 3.4
uvoOutput Low frequency Vi nom, Io nom 3333mV
pp
noise 3 Switching frequ. BW = 20 MHz 12 12 10 10
Total incl. spikes 40 40 50 50
∆Vo u Static line regulation Vi min – Vi max ±12 6±15 6mV
with respect to Vi nom Io nom
∆Vo I Static load regulation Vi nom –40 6–50 6
(0.1 – 1) Io nom
vo d Dynamic Voltage Vi nom ±100 ±150 ±100 ±150
load deviation 4 Io1 nom ↔ 1/2 Io1 nom
t d regulat.3
Recovery time4
1/2 Io2 nom 0.3 0.4 ms
αvo Temperature coefficient TC min – TC max ±0.02 ±0.02 %/K
of output voltage 5 Io nom
Table 4c: Output data of double-output models
LS5660 / 57407 Unit
Output 2 × 24 V / 25.68 V7
Characteristics Conditions Output 1 Output 2
min typ max min typ max
VoOutput voltage Vi nom, Io nom 1 23.86 7 24.14 7 23.64 7 24.367V
Vo P Overvoltage protection 28.5/347 28.5/347
(supressor diode)
Io nom Output current nom 2 Vi min – Vi max 2/1.772/1.77A
TC min – TC max
IoL Output current limit 6 Vi min – Vi max 2.1/272.1/27
uvoOutput Low fre q u ency Vi nom, Io nom 33mV
pp
noise 3 Switching frequ. BW = 20 MHz 5 5
Total incl. spikes 40 40
∆Vo u Static line regulation Vi min – Vi max ±30 6mV
with respect to Vi nom 3Io nom
∆Vo I Static load regulation Vi nom –40 6
(0.1 – 1) Io nom
vo d Dynamic Voltage Vi nom ±100 ±150
load deviation 4 Io1 nom ↔ 1/2 Io1 nom
t d regulat.3
Recovery time4
1/2 Io2 nom 0.3 ms
αvo Temperature coefficient TC min – TC max ±0.02 %/K
of output voltage 5 Io nom
1Same conditions for both outputs
2If 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.
3Measured according to IEC/EN
61204 with a probe annex A
4See Dynamic load regulation (fig.
13)
5For battery charger applications a
defined negative temperature
coefficient can be provided by using
a temperature sensor, see
Accessories.
6See Output Voltage Regulation of
Double-Output Models
7Especially designed for battery
charging using the battery
temperature sensor (see
Accessories). Vo1 is set to 25.68 V
±1% (R-input open).
8Breakdown voltage of the
incorporated suppressor diodes (1
mA). Exceeding Vo BR is dangerous
for the suppressor diodes.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 9 of 28
MELCHER
The Power Partners.
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 on the
conditions of operation and integration into a system. The
thermal conditions are influenced by input voltage, output
current, airflow, and temperature of surrounding 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), if TC max is not exceeded.
For -7 or -9 models at an ambient temperature TA of 85 °C with
only convection cooling, the maximum permissible current for
each output is approx. 40% of its nominal value as per the
figure below.
Fig. 11
Output current derating versus temperature for -7 and -9
models.
Thermal Protection
A temperature sensor generates an internal inhibit signal,
which disables the outputs if the case temperature exceeds
TC max. The outputs are automatically re-enabled, when the
temperature drops below this limit.
It is recommended that continuous operation under simul-
taneous extreme worst-case conditions of the following three
parameters be avoided: Minimum input voltage, maximum
output power, and maximum temperature.
Output Protection
Each output is protected by a suppressor diode against
overvoltage, which could occur due to a failure of the control
circuit. In such a case, the suppressor diode becomes a short
circuit. The suppressor diodes may smooth short over-
voltages resulting from dynamic load changes, but they are
not designed to withstand externally applied overvoltages.
A short circuit at any of the two outputs will cause a shut-down
of the other output. A red LED indicates an 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 or Series Connection of Converters
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, if several outputs are connected in
series.
0
0.2
0.4
0.6
0.8
50 60 70 80 90 100
Io/Io nom
TA [°C]
1.0
Forced
cooling
05089a
TA min
TC max
Convection cooling
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 10 of 28
MELCHER
The Power Partners.
V
o
V
o nom
0.98
0.5
0
0.5 1.0
I
o
I
oL
I
o
I
o nom
05001a
0 0.2 0.4 0.6 0.8 1 I
o2
/I
o2 nom
13.5
14
14.5
15
15.5
16
V
o2
[V]
I
o1
= 100%
I
o1
= 50%
I
o1
= 10%
16.5
05084a
Fig. 14
LS5320: ∆Vo2 versus Io2 with various Io1 (typ).
Output Voltage Regulation
The following figures apply to single-output or double-output
models with parallel-connected outputs.
01
Io2/Io2 nom
10.5
11
11.5
12.0
12.5
13
Vo2 [V]
Io1 = 100%
Io1 = 50%
Io1 = 10%
0.2 0.4 0.6 0.8
05083a
0 0.2 0.4 0.6 0.8 1 I
o2
/I
o2 nom
21
22
23
24
25
26
27
V
o2
[V]
I
o1
= 100%
I
o1
= 50%
I
o1
= 10%
05085a
Fig. 13
Typical dynamic load regulation of Vo.Fig. 15
LS5540: Vo2 versus Io2 with various Io1 (typ).
Fig. 16
LS5660: Vo2 versus Io2 with various Io1 (typ).
Fig. 12
Typ output characteristic Vo1 versus Io1.
Output Regulation of Double-Output Models
Output 1 is under normal conditions regulated to Vo nom,
independent 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 the value of Vo1. The following 3 figures
show the regulation with varying load distribution.
Two outputs of an LS5000 model connected in parallel will
behave like the output of an LS4000 model.
Note: If output 2 is not used, we recommend connecting it in
parallel with output 1. This ensures good regulation and ef ficiency.
V
od
V
od
t
d
t
d
V
o
±1% V
o
±1 %
t
t
≥10 µs ≥10 µs
V
o
0
0.5
1
I
o
/I
o nom
05102c
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 11 of 28
MELCHER
The Power Partners.
Auxiliary Functions
Inhibit for Remote On and 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 to pin 14.
Note: If pin 18 is not connected, the output is disabled.
Fig. 17
Definition of Vinh and Iinh.
Table 5: Inhibit characteristics
Characteristic Conditions min typ max Unit
Vinh Inhibit Vo = on Vi min – Vi max –50 0.8 V
voltage Vo = off 2.4 50
Iinh Inhibit current Vinh = 0 –400 µA
trRise time 30 m s
tfFall time depending on Io
Fig. 19
Output response as a function of inhibit control
Fig. 18
Typical inhibit current Iinh versus inhibit voltage Vinh
0t
t
0
Inhibit
1
0.1
1
V
o
/V
o nom
t
r
t
f
06001
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 contact s 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–
). The voltage difference between any sense line and its
respective power output (as measured on the connector)
should not exceed the following values:
Table 6: Maximum voltage compensation allowed using
sense lines
Output Total voltage difference Voltage difference
voltage between sense lines and between
their respective outputs Vo– and S–
5.1 V < 0.5 V <0.25 V
12 V, 15 V, 24 V <1.0 V <0.25 V
Note: If the output voltages are increased above Vo nom via R-input
control, option P setting, remote sensing, or option T, the output
currents must be reduced accordingly, so that Po nom is not
exceeded.
S–/Vo1–
i
Vo+
I
inh
V
inh
06031b
14
18
Input
1.6
0.8
0
–0.8
Vinh [V]
Iinh [mA]
–40 0
–20 20 40
2.0
1.2
0.4
–
0.4
Vinh = 0.8 V
Vo = on Vo = off
Vinh = 2.4 V
06032a
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 12 of 28
MELCHER
The Power Partners.
R
Vo1+
Vo1–
S–
V
ext
N~
L~
R
ext
R'
ex
t
14
16
16
14
+
S+
Vo1+
Vo1–
S–
N~
L~
R
12
06003a
Fig. 20
Output voltage control for single-output models LS 4000
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 current(s) should be reduced accordingly so that Po nom
is not exceeded.
– With double-output models the second output follows the
value of the controlled main output.
– In case of parallel connection the output voltages should be
individually set within a tolerance of 1 – 2%.
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 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:
The control voltage range is 0 – 2.75 V and allows an
output voltage adjustment in the range of approximately
0 – 110% 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 (Vo < Vo nom) to achieve
an output voltage adjustment range of approx. 0 – 100% Vo
nom.
or: Between pin 16 and pin 12 (Vo > Vo nom) to achieve an
output voltage adjustment range of approx. 100 – 110% Vo nom.
Warning:
–Vext shall never exceed 2.75 V.
– The value of R'ext shall never be less than the lowest value as
indicated in table R'ext (for V0 > V0 nom) to prevent the converter
from damage!
Table 7a: 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 nom = 15 V Vo nom = 24 V
Vo [V] Rext [kΩ]Vo [V] 1Rext [kΩ]Vo [V] 1 Rext [kΩ]Vo [V] 1 Rext [kΩ]
0.5 0.432 2 4 0.806 2 4 0.619 4 8 0.81
1.0 0.976 3 6 1.33 4 8 1.47 6 12 1.33
1.5 1.65 4 8 2 6 12 2.67 8 16 2
2.0 2.61 5 10 2.87 8 16 4.53 10 20 2.87
2.5 3.83 6 12 4.02 9 18 6.04 12 24 4.02
3.0 5.76 7 14 5.62 10 20 8.06 14 28 5.62
3.5 8.66 8 16 8.06 11 22 11 16 32 8.06
4.0 14.7 9 18 12.1 12 24 16.2 18 36 12.1
4.5 30.1 10 20 20 13 26 26.1 20 40 20
5.0 200 11 22 42.2 14 28 56.2 22 44 44.2
Table 7b: R’ext for Vo > Vo nom; approximate values (Vi nom, Io nom, series E 96 resistors); Rext = not fitted
Vo nom = 5.1 V Vo nom = 12 V Vo nom = 15 V Vo nom = 24 V
Vo [V] R'ext [kΩ]Vo [V] 1 R'ext [kΩ]Vo[V]1R'ext [kΩ]Vo [V] 1 R'ext [kΩ]
5.15 432 12.1 24.2 1820 15.2 30.4 1500 24.25 48.5 3320
5.2 215 12.2 24.4 931 15.4 30.8 768 24.5 49.0 1690
5.25 147 12.3 24.6 619 15.6 31.2 523 24.75 49.5 1130
5.3 110 12.4 24.8 475 15.8 31.6 392 25.0 50.0 845
5.35 88.7 12.5 25.0 383 16.0 32.0 316 25.25 50.5 698
5.4 75 12.6 25.2 316 16.2 32.4 267 25.5 51.0 590
5.45 64.9 12.7 25.4 274 16.4 32.8 232 25.75 51.5 511
5.5 57.6 12.8 25.6 243 16.5 33.0 221 26.0 52.0 442
13.0 26.0 196 26.25 52.5 402
13.2 26.4 169 26.4 52.8 383
1First column: Vo or Vo1; second column: double-output models with outputs in series connection
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 13 of 28
MELCHER
The Power Partners.
R'
ext
R
ext
14
16
Vo1–
Vo1+
R
Vo2–
Vo2–
Vo2+
Vo2+
12
10
8
6
4+
–
V
o1
24 V
30 V
48 V
C
o
06004a
Fig. 21
Double-output models: R-input for output voltage control.
Wiring for output voltage 24 V, 30 V ,or 48 V with both
outputs connected in series. A ceramic capacitor (Co) across
the load reduces ripple and spikes.
Display Status of LEDs
Test Sockets
Test jacks (pin diameter 2 mm) for measuring the main output
voltage Vo or Vo1 are located at the front of the converter. The
positive test jack is protected by a series resistor (see
Functional Description, block diagrams).
The voltage measured at the test jacks is slightly lower than
the value at the output terminals.
Fig. 22
LED indicators
LEDs "OK", "i" and "Io L" status versus input voltage
Conditions: Io ≤ Io nom, TC ≤ TC max, V inh ≤ 0.8 V
Vi uv = undervoltage lock-out, Vi ov = overvoltage lockout
LEDs "OK" and "Io L" status versus output current
Conditions: Vi min – Vi max, TC ≤ TC max, Vinh ≤ 0.8 V
LED "i" versus case temperature
Conditions: Vi min – Vi max, Io ≤ Io nom, Vinh ≤ 0.8 V
LED "i" versus Vinh
Conditions: Vi min – Vi max, Io ≤ Io nom, TC ≤ TC max
V
o1
> 0.95 to 0.98 V
o1 adj
V
i max
V
i ov
V
i min
V
i uv
V
i
V
i abs
OK
i
V
o1
> 0.95 to 0.98 V
o1 adj
I
o nom
I
oL
I
o
OK
I
o L
V
o1
< 0.95 to 0.98 V
o1 adj
T
C
i
T
C max
T
PTC threshold
V
i inh
i
+50 V
+0.8 V +2.4 V
-50 V
V
inh threshold
I
o L
LED off LED on
LED Status undefined
06002a
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 14 of 28
MELCHER
The Power Partners.
2.10
2.15
2.20
2.25
2.30
2.35
2.40
2.45
Cell voltage [V]
–20 –10 0 10 20 30 40 50 °C
06139b
V
C
= 2.27 V, –3 mV/K V
C
= 2.27 V, –3.5 mV/K
V
C
= 2.23 V, –3 mV/K V
C
= 2.23 V, –3.5 mV/K
V
o safe
Fig. 23
Connection of a temperature sensor
Battery Charging/Temperature Sensor
The LS series converters are suitable for battery charger
applications. For an optimum 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 pole and adjusts the output voltage
according to the battery temperature.
Fig. 24
Trickle charge voltage versus temperature for defined
temperature coefficient.
Power
supply Load
–
+
Input Vo–
R
Temperature sensor
ϑ
03099d
Battery
Vo+
+
Depending upon cell voltage and the temperature coefficient
of the battery, different sensor types are available, see
Accessories.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 15 of 28
MELCHER
The Power Partners.
10
40
JM071
dBµV/m
TÜV-Divina, Jan.2006
Testdistance 10 m, LS4601-7R, Ui=230 VAC, Uo=24 V Io= 4.2 A
50
20
30
EN 55022 B
<25 dbµV/m
Fig. 25
Conducted emissions (peak) at the neutral input according to
EN 55011/22, measured at Vi nom and Io nom (LS4601-6R). The
line input performs quite similar.
Emissions
0
10
20
30
40
50
60
70
80
0.2 0.5 1 2 5 10 20 MHz
dBµV LS4601-7R, Peak N, Conducted 0.15 - 30 MHz, Divina, Jan. 2006
EN 55022 B
Fig. 26
Typ. radiated emissions accord. to EN 55011/22, antenna 10 m
distance, measured at Vi nom and Io nom (LS4601-7R).
Electromagnetic Compatibility (EMC)
A metal oxide VDR together with an input fuse and an input
filter form an effective protection against high input transient
voltages, which typically occur in most installations. The S
Series has been successfully tested to the following
specifications:
Immunity
Table 11: Electromagnetic immunity (type tests)
Phenomenon Standard Level Coupling Value Waveform Source Test In Perf.
mode 1applied imped. procedure oper. crit.2
Electrostatic IEC/EN 4 contact discharge 8000 Vp1/50 ns 330 Ω10 positive and yes A
discharge 61000-4-2 air discharge 15000 Vp150 pF 10 negative
(to case) discharges
Electromagnetic IEC/EN 3 antenna 10 V/m AM 80% /1 kHz n.a. 80 – 1000 MHz yes A
field 61000-4-3 antenna 20 V/m AM 80% /1 kHz n.a. 800 – 1000 MHz yes A
10 V/m 1400 – 2100 MHz
5 V/m 2100 – 2500 MHz
3 antenna 10 V/m 50% duty cycle, n.a. 900 ±5 MHz yes A
200 Hz rep. rate pulse modul.
Electrical fast I EC/E N 3 capacitive, o/c ±2000 Vpbursts of 5/50 ns 50 Ω60 s positive yes A
transients/burst 61000-4-4 ±i/c, +i/–i 2.5/5 kHz over 60 s negative
direct 15 ms; burst transients per
period: 300 ms coupling mode
Surges IEC/EN 3 ±i/c ±2000 Vp1.2/50 µs 12 Ω5 pos. and 5 neg. yes A
61000-4-5 +i/–i ±1000 Vp2 Ωsurges per
coupling mode
Conducted IEC/EN 3 i, o, signal wires 10 VAC AM 80% 150 Ω0.15 – 80 MHz yes A
disturbances 61000-4-6 ( 140 dBmV) 1 k Hz sine wafe
Power fr equen cy IEC/EN 3 -- 100 A/m 60 s in all 3 axis yes A
magnetic field 61000-4-8
Pulse IEC/EN - -- ±300 A/m 5 pulses per axis yes B
magnetic field 61000-4-9 repetit. rate 10 s
1i = input, o = output, c = case
2A = Normal operation, no deviation from specifications, B = Temporary loss of function or deviation from specs possible
3For converters with version V102 or higher. Older LKP models meet only B.
4Only LKP models have been tested.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 16 of 28
MELCHER
The Power Partners.
Temperatures
Table 11: MTBF calculated according to MIL-Hdbk 217F
Values at specified Model Ground benign Ground fixed Ground mobile Unit
case temperature 40 °C 40 °C 70 °C 50 °C
MTBF LS 4000/5000 514 000 88 000 38 000 35 000 h
Reliability
Table 10: Temperature specifications, values given are for an air pressure of 800 – 1200 hPa (800 – 1200 mbar)
Temperature Option -7 Standard -9 Unit
Characteristics Conditions min max min max
TAAmbient temperature Converter –25 71 –40 71 °C
TCCase temperature 1operating –25 95 –40 95
TSStorage temperature Not operational – 40 100 – 5 5 100
1Overtemperature lockout at TC > 95 °C
Environmental Conditions
Table 9: Mechanical and climatic stress
Test Method Standard Test Conditions Status
Cab Damp heat IEC/EN 60068-2-78:2001 Temperature: 40 ±2 °C Converter not
steady state MIL-STD-810D sect. 507.2 Relative humidity: 93 +2/-3 % operating
Duration: 56 days
Ea Shock IEC/EN 60068-2-27:1987 Acceleration amplitude: 100 g n = 981 m/s2Converter
(half-sinusoidal) MIL-STD-810D sect. 516.3 Bump duration: 6 ms operating
Number of bumps: 18 (3 each direction)
Eb Bump IEC/EN 60068-2-29:1987 Acceleration amplitude: 40 gn = 392 m/s2Converter
(half-sinusoidal) MIL-STD-810D sect. 516.3 Bump duration: 6 ms operating
Number of bumps: 6000 (1000 each direction)
Fc Vibration IEC/EN 60068-2-6:1995 Acceleration amplitude: 0.35 mm (10 – 60 Hz) Converter
(sinusoidal) MIL-STD-810D sect. 514.3 5 gn = 49 m/s2 (60 – 2000 Hz) operating
Frequency (1 Oct/ min): 10 – 2000 Hz
Test duration: 7.5 h (2.5 h each axis)
Fh Random vibration IEC/EN 60068-2-64 Acceleration spectral density: 0.0 5 g n2/Hz Converter
broad band Frequency band: 8 – 500 Hz operating
(digital control) Acceleration magnitude: 4.9 gn rms
Test duration: 1.5 h (0.5 h each axis)
Kb Salt mist, cyclic IEC/EN 60068-2-52:1996 Concentration: 5 % (30 °C) Converter not
(sodium chloride Duration: 2 h per cycle operating
NaCl solution) Storage: 40 °C, 93 % rel. humidity
Storage duration: 22 h per cycle
Number of cycles: 3
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 17 of 28
MELCHER
The Power Partners.
111 (3U)
168.5
60
4.5
19.7
9.5
29.951.5
30.3
20.3
12.1
10.3
7.0
3.27
7 TE 5 TE
Test jacks
Option P (Vo)
Option D (Vti)
LED OK (green)
LED i (red)
LED IoL (red)
Option D (Vto)
25.9
Front plate Main face Back plate
(171.0 to 171.9)
50
11.8
= Ø 3.5
= Ø 4.1
(+/–)
152
100
M4
55
8
152
8
09004f
Measuring point of
case temperature TC
d
= Ø 4.1
= Ø 3.5
Screw holes of the
frontplate
∅5 x 90°
∅2.8
0.2
Mechanical Data
Dimensions in mm. The converters are designed to be inserted into
a 19" rack, 160 mm long, according to IEC 60297-3.
European
Projection
Notes:
–d ≥ 15 mm, recommended minimum distance to
next part in order to ensure proper air circulation
at full output power.
– free air location: the converter should be moun-
ted with fins in a vertical position to achieve
maximum airflow through the heat sink.
Fig. 27
Aluminum case S02 with heat sink;
black finish (EP powder coated);
weight approx. 1.25 kg
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 18 of 28
MELCHER
The Power Partners.
6.5
11.2
13
140
17.3 133.4
±0.2
30
168
547.2
38.5
127 6.5
11.8
11027
European
Projection
111 (3U)
17.3 133.4
168
101
5
47.2
158
5
M 4
5
Measuring point of
case temperature T
C
50
(171.0 ... 171.9)
3.27
7 TE 4 TE
09003b
38.5
11.8
Fig. 28
Option B1: Aluminium case S02 with small cooling plate; black finish (EP powder coated).
Suitable for mounting with access from the backside.
Total weight approx. 1.2 kg.
Fig. 29
Option B: Aluminum case S02 with large cooling plate; black finish (EP powder coated).
Suitable for front mounting.
Total weight approx. 1.3 kg
Note: Long case with option B2, elongated by 60 mm for 220 mm
rack depth, is available on request (no LEDs, no test sockets).
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 19 of 28
MELCHER
The Power Partners.
Fig. 30
View of converter's male connector, type H15
Safety and Installation Instructions
Connector Pin Allocation
The connector pin allocation table defines the electrical
potentials and the physical pin positions on the H15
connector. The protective earth is connected trough a leading
pin (no. 24), ensuring that it makes contact with the female
connector first.
Installation Instructions
Important: These products have a power factor correction (PFC)
and are intended to replace the LS1000 and LS2000 series
converters, in order to comply with IEC/EN 61000-3-2.
Switch off the system and check for hazardous voltages
before altering any connection!
These converters are components, intended exclusively for
inclusion within other equipment by an industrial assembly
operation or by professional installers. The installation must
S10002b
32 28 24 20 16 12 8 4
30 26 22 18 14 10 6
Fixtures for retention clips
strictly follow the national safety regulations in compliance
with the enclosure, mounting, creepage, clearance, casualty,
markings, and segregation requirements of the end-use
application.
Connection to the system shall be made via the female
connector H15 (see Accessories). Other installation methods
may not meet the safety requirements.
Pin no. 24 ( ) is reliably connected with the case. For safety
reasons, it is essential to connect this pin reliably to protective
earth. See Safety of Operator-Accessible Output Circuits.
The phase input 30/32 (L~) is connected via a built-in fuse
(see Input Fuse), which is designed to protect in the case of a
converter failure. An additional external fuse, suitable for the
application, might be necessary in the wiring to the other line
input 26/28 (N~) if:
• Local requirements demand an individual fuse in each
source line
• Neutral and earth impedance is high or undefined
• Phase and neutral of the mains are not defined or cannot
be assigned to the corresponding terminals (L~ to phase
and N~ to neutral).
Notes:
– If the inhibit function is not used, pin no. 18 (i) should be
connected to pin no. 14 (S–/Vo1–) to enable the output(s).
– Do not open the converters, or warranty will be invalidated.
– Due to high current values, the converters provide two
internally parallel contacts for certain paths (pins 4/6, 8/10, 26/
28 and 30/32). It is recommended to connect load and supply to
both female connector pins of each path in order to keep the
voltage drop low and to not overstress the connector contacts
with high currents.
– If the second output of double-output models is not used, connect
it parallel with the main output.
Make sure that there is sufficient airflow available for
convection cooling. This should be verified by measuring the
case temperature, when the converter is installed and
operated in the end-use application. See Thermal Con-
siderations.
Ensure that a converter failure (e.g., by an internal short-
circuit) does not result in a hazardous condition. See also
Safety of Operator-Accessible Output Circuit.
Standards and Approvals
The converters are safety-approved to EN/IEC 60950-1, and
UL/CSA 60950-1 2nd Ed. (version 106 or greater).
The converters correspond to Class I equipment and have
been evaluated for:
• Building-in
• Basic insulation between input and case based on 250
VAC, and double or reinforced insulation between input and
output(s).
• Functional insulation between output s.
• Overvolt age category II
Table 12: Pin allocation
Pin Connector type H15
no. LS4000 LS5000
4Vo1+ Positive output Vo2+ Pos. output 2
6
8Vo1– Negative output Vo2– Neg. output 2
10
12 S+ Sense+ Vo1+ Output 1
14 S– Sens e– Vo1– Output 1
16 R 1 Control of Vo1 R 1 Control of Vo1
18 i Inhibit i Inhibit
20 D 3 Save data D 3 Save data
V 3 ACFAIL
22 T 4 Current share T 4 Current share
24 2 Protective earth Protective earth
26 N
~
Neutral line N
~
Neutral line
28
30 L
~
Phase line L
~
Phase line
32
1Not connected, if option P is fitted
2Leading pin (pre-connecting)
3Option D excludes option V and vice versa. Pin is not connec-
ted, if neither option D or V is fitted.
4Not connected, unless option T is fitted.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 20 of 28
MELCHER
The Power Partners.
• Pollution degree 2 environment
• Max. altitude: 2000 m.
• The converters fulfill the requirements of a fire
enclosure.
All boards of the converters are coated with a
protective lacquer.
The converters are subject to manufacturing surveillance
in accordance with the above mentioned UL standards and
ISO 9001:2008. CB-scheme is available.
Protection Degree and Cleaning Liquids
Condition: Female connector fitted to the converter.
• IP 30: All models except those with option P, and except
those with option D or V including a potentiometer.
• IP 20: All models fitted with option P, or with option D or V
with potentiometer.
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented.
Isolation and Leakage Currents
The electric strength test is performed in the factory as routine
test in accordance with EN 50514 and IEC/EN 60950. The
company will not honor warranty claims resulting from
incorrectly performed electric strength field tests.
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 13: Isolation
Characteristic Input to case Output(s) to Output 1 to Unit
and output(s) case output 2
Electric Factory test >1 s 2.8 1 1.4 0.15 kVDC
strength AC test voltage equivalent 2.0 1.0 0.1 kVAC
test to factory test
Insulation resistance at 500 VDC >300 >300 >100 2 MΩ
Creapage distances ≥3.2 3 -- -- mm
1According to IEC/EN 60950, subassemblies connecting input to output are pre-tested with 5.6 kVDC or 4 kVAC.
2Tested at 150 VDC
3Input to outputs: 6.4 mm
Table 14: Leakage currents
Characteristic Class I Unit
Maximum earth Permissible according to IEC/EN 60950 3.5 mA
leakage current Typ. value at 254 V, 50 Hz (LS models) 0.8
Fig. 31
Schematic safety concept.
Railway Applications and Fire Protection
The converters have been designed by observing the railway
standards EN 50155 and EN 50121-4. All boards are coated
with a protective lacquer.
The converters with version V108 (or later) comply with NF-F16
(I2/F1). They also accord to EN 45545-1, EN 45545-2 (2013),
if installed in a technical compartment or cabinet.
Safety of Operator-Accessible Output Circuit
If the output circuit of an converter is operator-accessible, it
shall be an SELV circuit according to IEC/EN 60950 .
The table below shows a possible installation configuration,
compliance with which causes the output circuit of an S Series
AC-DC converter to be an SELV circuit according to IEC/EN
60950 up to a configured output voltage of 36 V (sum of nominal
output voltages connected in series) .
Table 15: Safety concept leading to an SELV output circuit
Conditions AC-DC converter Inst allation Result
Nominal voltage Grade of insulation Measures to achieve the resulting Safety status of the AC-DC
between input and output safety status of the output circuit converter output circuit
provided by the AC-DC converter
Mains Double or reinforced Earthed case1 and installation SELV circuit
≤250 VAC according to the applicable standards
1 The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC/EN 60950.
AC-DC
con-
verter
Mains SEL
V
Earth
connection
+
–
~
~
10021a
Fuse
Fuse
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 21 of 28
MELCHER
The Power Partners.
-7 Restricted Temperature Range
Option -7 and -7E stand for a restricted operational ambient
temperature range of –25 to 71 ° C rather than –40 to 71 ° C.
E Inrush Current Limitation
The converters exhibit an electronic circuit replacing the
standard built-in NTC, in order to achieve an enhanced inrush
current limiting function (standard feature).
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.
Fig. 32
Option E block diagram
Description of Options
Table 16: Survey of options
Option Function of option Characteristic
-7, -7E Extended operational ambient temperature range TA = –25 to 71 °C
E Electronic inrush current limitation circuitry Active inrush current limitation, standard feature for TA = –40 °C
P2Potentiometer for fine adjustment of output voltage Adjustment range +10/–60% of Vo nom, excludes R input
D1Input and/or output undervoltage monitoring circuitry Safe data signal output (D0 – DD)
V1Input and/or output undervoltage monitoring circuitry ACFAIL signal according to VME specifications (V0, V2, V3)
T Current sharing Interconnect T-pins if paralleling outputs (max 5 converters)
B, B1, B2 Cooling plate (160 or 220 mm long) Replaces standard heat sink, allowing direct chassis-mounting
G RoHS-compliant for all six substances G is always the last character in the type designation
1Option D excludes option V and vice versa; option V only for 5.1 V outputs.
2Option P is not available for battery charger models.
Input Filter
Control
Converter
FET
C
b
R
I
Rectifier
PFC - correct.
11001b
+
R
s
Table 17: Inrush current characteristics with option E
Characteristics LS Unit
Vi = 230 VAC typ max
Iinr p Peak inrush current – 25.3 A
tinr Inrush current duration 35 50 m s
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).
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 accordingly, so that
Po nom is not exceeded.
Fig. 33
Inrush current with option E
Vi = 230 VAC, fi = 50 Hz, Po = Po nom
15
Ii [A]
10
5
0
–5
–
10
020 40 60 80 ms
t
tinr
Capacitor C
i
fully charged
Normal operation
(FET fully conducting)
20
10 50 7030
11002b
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 22 of 28
MELCHER
The Power Partners.
Fig. 35
Paralleling of single-output models using option T with the
sense lines connected at the load
Fig. 36
Paralleling of double-output models with the outputs
connected in series, and using option T with power bus.
Note that the signal at the T pins is referenced to Vo1–.
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
the Vo1–), are also connected together. The load lines should
have equal length and cross section to ensure equal voltage
drops.
Fig. 34
An example of poor wiring for connection in parallel
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.
Parallel connection of converters with option P is not
recommended.
Vo+
Vo–
Vo+
Vo–
Load
Vo+
Vo–
11003a
Load
1
1
1
2
2
S+
Vo+
Vo–
S–
T
S+
Vo+
Vo–
S–
T
1
Max. 5 converters in parallel connection
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
11036b
Converter
Converter
Load
Max. 5 converters in parallel connection
+–
Power bus
Converter
Vo2–
Vo2+
Vo1–
Vo1+
T
Converter
Vo2–
Vo2+
Vo1–
Vo1+
T
11037b
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 23 of 28
MELCHER
The Power Partners.
Vo+/Vo1+
S–/Vo1–
D
V
D
I
D
R
p
Input
11007a
NPN open
collector
20
14
D Undervoltage Monitor
The input and/or output undervoltage monitoring circuit
operates independently of the built-in input undervoltage
lockout circuit. A logic "low" (self conducting JFET) or "high"
signal (NPN output) is generated at the D output (pin 20),
when one of the monitored voltages drops below the
preselected threshold level Vt. This signal is referenced to S–
/ Vo1–. The D output recovers, when the monitored voltages
exceed Vt + Vh. The threshold level Vbi is adjusted in the
factory. The threshold level Vto is 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 the
table below.
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. The current ID through the JFET
should not exceed 2.5 mA. The JFET is protected by a 0.5 W
Zener diode of 8.2 V against external overvoltages.
Fig. 37
Option D0 – D4: JFET output, ID ≤ 2.5 mA
Fig. 38
Option D5 – DD: NPN output, Vo1 ≤ 40 V, ID
≤
20 mA
Vo+/Vo1+
S–/Vo1–
D
V
D
I
D
R
p
Input
11006a
Self-conducting
junction FET
20
14
NPN output (D5 – DD):
Pin D is internally connected via the collector-emitter path of a
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 19: JFET output (D0 – D4)
Vb, Vo1 status D output, VD
Vb or Vo1 < Vtlow, L, VD ≤ 0.4 V at ID = 2.5 mA
Vb and Vo1 > Vt + Vhhigh, H, I D ≤ 25 µA at VD = 5.25 V
Table 18: Undervoltage monitoring functions
Output type Monitoring Minimum adjustment range Typical hysteresis Vho
[% of Vt]
JFET NPN Vb 4Vo/Vo1 of threshold level Vtfor Vt min – Vt max
Vtb 4Vto Vho
D1 D5 no yes - 3.5 – VBR 1 2.5 – 0.6 V
D2 D6 yes no 355 VDC - -
D3 D7 yes yes 355 VDC (0.95 – 0.985 Vo1) 2 "0"
D4 D8 no yes - (0.95 – 0.985 Vo1) 2 "0"
D0 D9 no yes - 3.5 – VBR 3 2.5 – 0.6 V
yes yes 355 VDC 3.5 – VBR 3 2.5 – 0.6 V
DD yes yes 355 VDC 3.5 – VBR 1 2.5 – 0.6 V
1Threshold level adjustable by potentiometer. See Output Data for VBR.
2Fixed value. Tracking if Vo1 is adjusted via R-input, option P, or sense lines.
3The threshold level permanently adjusted according to customer specification ±2 % at 2 5 °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).
4Vb is the voltage generated by the boost regulator. When Vb drops below 355 V, the D signal triggers, and the output(s) will remain
powered during nearly the full hold-up time th.
Table 20: JFET output (D5 – DD)
Vb, Vo1 status D output, VD
Vb or Vo1 < Vthigh, H, ID ≤ 25 µA at VD = 40 V
Vb and Vo1 > Vt + Vhlow, L, VD ≤ 0.4 V at ID = 20 mA
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 24 of 28
MELCHER
The Power Partners.
0
1
0.95
0
V
b
[VDC]
0
t
t
t
t
low min4
t
low min4
t
high min
th1
358
355
Input voltage failure Switch-on cycle Input voltage sag Switch-on cycle and subsequent
input voltage failure
V
D high
VD low
VD
0
JFET
NPN
t
V
o1
V
o1 nom
V
D high
VD low
VD
t
low min4
t
h1
0
0
V
D high
VD low
VD
0
JFET
NPN
Vo1
V
D high
VD low
VD
t
low min4
V
to
Output voltage failure
0
I
D high
ID low
ID
t
0
I
D high
ID low
ID
t
t
t
t
2
33 33
V
o1 nom
V
to
+V
ho
Input voltage monitoring
Output voltage monitoring
11044b
1Hold-up time see: Electrical Input Data.
2With output voltage monitoring, hold-up time th = 0.
3The signal remains high, if the D output is connected
to an external source.
4tlow min = 100 – 170 ms, typically 130 ms.
Fig. 39
Relationship between Vb, Vo1, VD, Vo1/Vo1 nom versus
time
Table 21: D-output logic signals
Version of D Vb <<
<<
< Vt resp. Vo <<
<<
< VtVb >>
>>
> Vt + Vh resp. Vo >>
>>
> VtConfiguration
D1, D2, D3, D4, D0 low high JFET
D5, D6, D7, D8, D9, DD high low NPN
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 25 of 28
MELCHER
The Power Partners.
3
5.1 V
4.875 V
0
V
b
[VDC]
0
t
t
358
355
Input voltage failure Switch-on cycle Input voltage sag Switch-on cycle and subsequent
input voltage failure
V
V high
V
V low
V
V
0
V
2
V
o
0
V
V high
V
V low
V
V
0
V
2
V
i
V
ti
4
Out
ut volta
e failure
0
V
V high
V
V low
V
V
3
V
ti
+ V
hi
t
low min 2
t
low min 2
t
low min 2
33
4
4
V
V high
V
V low
V
V
0
V
3
3
t
low min 2
t
low min 2
33
t
h 1
2.0 V
t
h 1
4
3
4
t
low min 2
V
3
5.1 V
4.875 V
0
V
o
2.0 V
I
npu
t
v
ol
t
a
g
e
m
oni
t
o
r
ing
O
u
t
pu
t
v
ol
t
a
g
e
m
oni
t
o
r
ing
11045a
t
t
t
t
Fig. 40
Vcb, Vo, VV, IV, Vo/Vo nom versus time.
1VME request: minimum 4 ms
2tlow min = 40 – 200 ms, typ 80 ms
3VV level not defined at Vo < 2.0 V
4The V signal drops simultaneously with the output
voltage, if the pull-up resistor RP is connected to Vo+;
the V signal remains high if RP is connected to an
external source.
V ACFAIL Signal (VME)
Available only for models with Vo = 5.1 V.
This option defines an undervoltage monitoring circuit for
the input and main output voltage. It generates the ACFAIL
signal (V signal) according to the VME standard.
The low state level of the ACFAIL signal is specified at a sink
current of IV ≤ 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 backplane.
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 26 of 28
MELCHER
The Power Partners.
Fig. 41
Output configuration of options V2 and V3
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 sufficient cooling capacity to
guarantee that the maximum case temperature TC max is not
exceeded. The cooling capacity is calculated by:
(100% –
η)
PLoss = –––––––––– • Vo • Io
η
Efficiency η see Model Selection
For the dimensions of the cooling plates, see Mechnical Data.
Option B2 is for customer-specific models with elongated
case (for 220 mm DIN-rack depth).
G RoHS
Models with G as last character of the type designation are
RoHS-compliant for all six substances.
Vo+
S–
V
VV
IV
Rp
Input
11009a
NPN open
collector
20
14
After the ACFAIL signal has gone low, the VME standard
requires a hold-up time th of at least 4 ms before the 5.1 V
output drops at full load to 4.875 V. This hold-up time th is
provided by the capacitance supporting the boost voltage Vb.
See Hold-up Time.
Table 22: Undervoltage monitor functions
V output Monitoring Minimum adjustment
(VME compatible) VbVo1 range of threshold level
Vtb Vto
V2 yes no 355 VDC 1–
V3 yes yes 355 VDC 1 0.95 – 0.985 Vo1 2
1Option V monitors Vb generated by the boost regulator. The
trigger level is adjusted in the factory to 355 VDC.
2Fixed value between 95% and 98.5% of Vo1
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 Vt. The return for this
signal is S– or Vo1–. The V output recovers, when the
monitored voltage(s) exceed(s) Vt + Vh. The threshold level
Vto is adjusted in the factory to a customer-specified value.
V-output (V2, V3):
Connector pin V is internally connected with the open
collector of an NPN transistor. The emitter is connected with
S– or
Vo1–. V
V ≤ 0.6 V (logic low) corresponds to a monitored
voltage level (Vi and/or Vo) <Vt. The current IV through the
open collector should not exceed 50 mA. The NPN output is
not protected against external overvoltages. VV should not
exceed 60 V.
Table 23: Status of V output
Vb, Vo status V output, VV
Vb or Vo < Vtlow, L, VV ≤ 0.6 V at IV = 50 mA
Vb and Vo1 > Vt + Vhhigh, H, IV ≤ 25 µA at VV = 5.1 V
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 27 of 28
MELCHER
The Power Partners.
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. 42.
– Mating H15 connectors with screw, solder, faston, or
press-fit terminals, code key system and coding wedges
HZZ00202-G; see fig. 43.
– Pair of connector retention clips HZZ01209-G; see fig. 44
– Connector retention brackets HZZ01216-G; see fig. 45.
– Cage clamp adapter HZZ00144-G; see fig. 46
– Different cable hoods for H15 connectors (fig. 47):
- HZZ00141-G, screw version
- HZZ00142-G, use with retention brackets HZZ01218-G
- HZZ00143-G, metallic version providing fire protection
Fig. 44
Connector retention clips to fasten the H15 connector to
the rear plate; see fig. 24. HZZ01209-G consists of 2 clips.
Fig. 46
Cage clamp adapter HZZ00144-G
Fig. 42
Different front panels
Fig. 43
Different mating connectors
Fig. 45
Connector retention brackets HZZ01216-G (CRB-HKMS)
20 to 30 Ncm
Fig. 47
Different cable hoods
S Series with PFC Data Sheet
100 Watt AC-DC PFC Converters
BCD20003-G Rev AD2, 17-Apr-2018 Page 28 of 28
MELCHER
The Power Partners.
Fig. 48
Chassis- or wall-mounting plate
HZZ01213-G (Mounting plate K02)
56 (2.2")L
L = 2 m (standard length)
other cable lengths on request
adhesive tape
26 (1.02")
9.8 (0.4")
09125a
Fig. 49
DIN-rail mounting assembly HZZ00615-G (DMB-K/S)
European
Projection
Table 24: Battery temperature sensors
Battery Sensor Cell Cell temp. Cable
voltage type voltage
coefficient
length
nom. [V] [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
Fig. 50
Battery temperature sensor
Note: Other temperature coefficients and cable lengths are
available on request.
– Chassis or wall-mounting plate K02 (HZZ01213-G) for
models with option B1. Mating connector (HZZ00107-G)
with screw terminals; see fig. 48
– DIN-rail mounting assembly HZZ0615-G (DMB-K/S); see
fig. 49
– 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. 32, table 12, 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:
www.belpowersolutions.com
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.
Copyright © 2018, Bel Power Solutions Inc. All rights reserved. belfuse.com/power-solutions