LR Series Data Sheet
210
–
300 Watt AC-DC Converters with PFC
Features
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111
4.4"
3U
60
2.4"
12 TE
168
6.6"
RoHS-compliant
Class I equipment
Universal input voltage range
Inrush current limitation
2 isolated adjustable outputs
No load, overload, and short-circuit proof
Rectangular current limiting characteristic
Inhibit function
Parallel operation with active current sharing
Hold-up time 20 ms
Designed according to EN 50155, EN 50121-4, AREMA
Fire & smoke according to EN 45545.
Immunity according to IEC 61000-4-2, -3, -4, -5, -6, -8, -9
ALL PCB boards protected by lacquer
Very high reliability
Safety-approved according to IEC/EN 60950-1, UL/CSA
60950-1 2
nd
Ed.
111
4.4"
3U
80
3.2"
16 TE
168
6.6"
Description
The LR Series of AC-DC converters represents versatile power
supplies ideally suitable for use in advanced electronic
systems. Features include full power factor correction, good
hold-up time, high efficiency and reliability, low output noise,
and excellent dynamic response to load/line changes.
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. Input inrush current limitation is included to
prevent circuit breakers and fuses from tripping at switch-on.
The outputs are open- and short-circuit proof.
Full input-to-output, input-to-case, output-to-case, and output
to output isolation is provided. Particularly the outputs exhibit
an extended insulation to the case. All boards are coated with a
protective lacquer.
P
Table of Contents
lim
re
Page
ary
in
Page
Description .......................................................................... 1
Model Selection .................................................................. 2
Functional Description ........................................................ 4
Electrical Input Data ............................................................ 5
Electrical Output Data ......................................................... 6
Auxiliary Functions ............................................................. 11
Electromagnetic Compatibility (EMC) ...............................
Immunity to Environmental Conditions .............................
Mechanical Data ...............................................................
Safety and Installation Instructions ...................................
Description of Options ......................................................
Accessories .......................................................................
13
15
16
19
20
21
Copyright © 2016, Bel Power Solutions Inc. All rights reserved.
BCD.00580 Rev. 003, 23-Mar-2016 Prelim.
MELCHER
The Power Partners.
Page 1 of 22
LR Series Data Sheet
210
–
300 Watt AC-DC Converters with PFC
The case design allows for 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
T
C
exceeds
the limit. The outputs are automatically re-enabled when the
temperature drops below the limit.
LED indicators display the status of the converter and allow for
visual monitoring of the system at any time.
The converters can either be plugged into a 19 " rack system
according to IEC 60297-3, or be chassis mounted. Two heat
sinks of different size and cooling plates for chassis mounting
(option B, B1) are available.
Model Selection
Table 1: Model Selection
Output 1
V
o nom
[V]
12
12
15
15
48
48
1
2
Output 2
I
o nom
[A]
10
12.5
8
10
2.2
2.6
Power
P
o nom
[W]
240
300
240
300
211
250
Input voltage
V
i cont
[VAC]
90 to 264
η
1101
min.
[%]
90
typ.
[%]
η
230 2
min.
[%]
typ.
[%]
Model
Opt.
I
o nom
V
o nom
[A]
[V]
10
12.5
8
10
2.2
2.6
12
12
15
15
48
48
LR2320-9RG
LRP2320-9RG
LR2540-9RG
LRP2540-9RG
LR2880-9RG
LRP2880-9RG
F0, F2,
B, B1
Efficiency at
T
A
= 25 °C,
V
i
= 110 VAC,
I
o nom
,
V
o nom
Efficiency at
T
A
= 25 °C,
V
i
= 230 VAC,
I
o nom
,
V
o nom
BCD.00580 Rev. 003, 23-Mar-2016 Prelim.
MELCHER
The Power Partners.
Page 2 of 22
LR Series Data Sheet
210
–
300 Watt AC-DC Converters with PFC
Part Number Description
LR 2 3 20 -9 B1 G
Operating input voltage
V
i cont
(continuously):
100 – 240 VAC ................................................ LR, LRP
Number of outputs ......................................................... 2, 7
2
Nominal voltage of main output
V
o1 nom
12 V ............................................................................ 3
15 V ............................................................................ 5
24 V
4 ...........................................................................................................
6
36 V ............................................................................ 7
48 V ............................................................................ 8
Other voltages
1
........................................................... 9
Nominal voltage of tracking output
V
o2 3
12 V ............................................................................ 20
15 V ............................................................................ 40
24 V
4 .........................................................................................................
60
36 V
4 .........................................................................................................
70
48 V ............................................................................ 80
Other specifications or additional features
1
...... 21 – 99
Operational temperature range:
T
A
:
T
A
= – 40 to 71 °C,
T
C
≤
95 °C .................................... -9
Other
1
............................................................... -0, -5, -6
Auxiliary functions and options:
Fuse options ........................................................ F0, F2
Cooling plate standard case ................................. B, B1
Cooling plate for long case 220 mm
2
...................... B2
2
RoHS-compliant for all 6 substances .......................... G
1
2
3
4
Customer-specific models. No safety-relevant changes compared to the respective basic model, e.g. different mechanical details,
special markings, mounted front plates, reduced output voltage, etc.
Converters with 220 mm case (customer-specific models). Add 5000 to the model number!
The nominal voltages of both outputs are always equal.
Models not or not yet available
Note:
The sequence of options must follow the order above.
Example: LR 2320-9B1G: AC-DC converter, operating input voltage range 90 to 264 VAC, 2 isolated outputs, each providing
12 V, 20 A, cooling plate B1, 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.
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.
BCD.00580 Rev. 003, 23-Mar-2016 Prelim.
MELCHER
The Power Partners.
Page 3 of 22
LR Series Data Sheet
210
–
300 Watt AC-DC Converters with PFC
Functional Description
The input voltage is fed via an efficient filter and a bridge
rectifier to the PFC-corrected step-up converter, which
generates the intermediate voltage across the bulk capacitor
C
b
. The inrush current is limited by the resistor
R
inr
, which is
shorted by V
inr
, after the bulk capacitor was charged.
The bulk capacitor sources a half bridge DC-DC converter and
provides the power during the specified hold-up time.
The main transformer exhibits two secondary windings for the
two outputs. The resultant voltages are rectified by
synchronous rectifiers (not models with
V
o
= 2
×
48 V), in order
to provide the best efficiency. Their ripple voltages are
smoothed by a dual choke and output filters. The control logic
senses the main output voltage
V
o1
and generates the gate
signals for the DC-DC converter, which are transferred by
isolated drivers to the primary side.
The second output is tracking the main output voltage, but has
its own current limiting circuit. If the main output voltage drops
due to current limitation, the second output voltage will drop as
well and vice versa.
The output voltages can be adjusted by external means.
Parallel operation of several converters is possible by
connecting the T-pins together in order to provide active
current sharing. Both outputs can be connected in parallel or in
series. They exhibit a rectangular current limitation cha-
racteristic. Switchable preloads ensure good regulation even
with no load at one output.
A control output (D) and two LEDs signal correct operation of
the converter. In case of an output overvoltage of the main
output, the converter is disabled by a latch.
When the input voltage is too high, the overvoltage lockout
disables the DC-DC converter and protects it from damage.
Temperature sensors on the primary and secondary side
prevent the converter from excessive warm-up.
A cooling plate for chassis-mounting is available (opt. B, B1).
JM190
Magnetic
feedback
16 R
NTC
Boost converter
(65 kHz)
N~ 26
28
Fuse
2
C
Y
Secondary
control
logic
18 i
20 D
22 T
Isolation
VDR
+
Forward converter
(110 kHz)
C
b
Synchr.
rect. drive
3
Input filter
Bridge retifier
Bridge retifier
C
x
Output 2
filter
12 Vo2+
C
Y
C
Y
+
NTC
14 Vo2–
4
Vo1+
6
Primary
control
V
inr
Synchr.
rect. drive
3
V
PL2
Output 1
filter
R
inr
L~ 30
32
+
C
Y
C
Y
Fuse
1
C
Y
24
Auxiliary
converter
V
PL1
10
Vo1–
8
1
Fuse, except opt. F0
2
Fuse only with opt. F2
3
Models with 2x 48 V have rectifier diodes
Fig. 1
Block diagram
BCD.00580 Rev. 003, 23-Mar-2016 Prelim.
MELCHER
The Power Partners.
Page 4 of 22
LR Series Data Sheet
210
–
300 Watt AC-DC Converters with PFC
Electrical Input Data
General Conditions:
–
T
A
= 25 °C, unless
T
C
is specified.
– Pin 18 (i) connected to pin 14, pin 16 (R), pin 18 (D), and pin 22 (T) left open-circuit.
Table 2: Electrical input data
Input
Characteristics
V
i
V
i op
V
i nom
I
i
P
i0
P
i inh
t
hu
C
b
t
on
V
i abs
Rated input voltage range
Operating input voltage range
Nominal input voltage
1
Input current
No-load input power
Idle input power
Hold-up time
Boost capacitance
Start up time
Input voltage limits
without damage
<2s
–400
400
–400
400
Conditions
I
o
= 0
–
I
o nom
T
C min
to
T
C max
50 – 60 Hz
V
i nom
,
I
o nom
V
i min
–
V
i max
,
I
o
= 0
converter inhibited
V
i
= 100 VAC,
I
o nom
,
20
20
ms
µF
ms
V
peak
min
100
90
230
LR
typ
max
240
264
min
100
90
230
A
W
LRP
typ
max
240
264
VAC
1
Unit
1
Rated input frequency: 50 – 60 Hz, operating frequency: 47 – 63 Hz. For operation at other frequencies, contact the factory.
Operation with DC input voltage is not specified and not recommended.
Input Fuse and Protection
A VDR together with the input fuse and a symmetrical input
filter form an effective protection against high input transient
voltages.
A fuse mounted inside the converter in the phase line protects
against severe defects. A second fuse in the neutral line may
be necessary in certain applications; see
Options
and
Installation Instructions.
Table 3: Fuse specification
Model
LR2320, LR2540
LRP2320, LRP2540
LR2880
LRP2880
Fuse rating
5 A, 250 V, slow, 5
×
20 mm
6 A, 250 V, slow, 5
×
20 mm
4 A, 250 V, slow, 5
×
20 mm
5 A, 250 V, slow, 5
×
20 mm
Part no.
5TTP 5-R
5TTP 6-R
5TTP 4-R
5TTP 5-R
Inrush Current Limitation
All models exhibit an electronical inrush current limitation to
protect connectors and switching devices against damage; see
Auxiliairy Functions.
Efficiency
Input Under- /Overvoltage Lockout
If the input voltage is below approx. 80 VAC or exceeds
V
i op max
, an internally generated inhibit signal disables the
outputs.
If
V
i
is below
V
i min
, but above the undervoltage lockout level,
the output voltage may be below the value specified in the
tables
Electrical Output Data.
Fig. 2
Efficiency versus V
i
and I
o
(LR2320, both outputs connected
in series)
BCD.00580 Rev. 003, 23-Mar-2016 Prelim.
MELCHER
The Power Partners.
Page 5 of 22
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