OUTPUT SPECIFICATIONS
Voltage accuracy
1.0%
Voltage adjustability
Singles and duals, Note 7, 8
10%
Remote sense
See Note 5, 6
Yes
Line regulation
HL-LL
0.5%, max.
Triples, 5V output
1% max.
Load regulation
FL-0.25%FL
1.0% max
Note 3, 11
Dual output
2% max.
Triples, 5V output
5.0% max.
Ripple and noise
5Hz to 20MHz
75mV pk-pk
10mV rms, max.
Transient response
25% step load,
1.0% error band
change
500s recovery max.
Temperature coefficient
0.02%/C, max.
Overvoltage protection
See Note 4
OVP clamp on
all outputs
Short circuit protection
All outputs
Continuous
automatic recovery
INPUT SPECIFICATIONS
Input voltage range
12VDC
9 to 18VDC
24VDC
18 to 36VDC
48VDC
36 to 72VDC
No load input current
Singles, duals at 12Vin
25mA
Triples at 12Vin
70mA
Singles, duals at 24 and 48Vin
20mA
Triples at 24 and 48Vin
45mA
Input filter
Pi network
Reverse voltage
Note 12
Internal shunt diode
protection
Use external fuse
Surge protection
Transient clamp
INPUT SPECIFICATIONS CONTINUED
Remote ON/OFF
Logic compatibility
CMOS or open collector TTL
E
c
-ON
+5.5VDC min. or open-circuit
E
c
-OFF
max. 1.8VDC
Shutdown idle current
5mA
Input resistance
0VDC <Ein< 9VDC; 100k
Control common
Referenced to input minus
GENERAL SPECIFICATIONS
Efficiency
See table
78%, min.
Isolation voltage
Input/output
500VDC, min.
See Note 9
Input/case
250VDC, min.
Switching frequency
Fixed
100kHz
Approvals and
Safety
UL478
standards
Case material
Black coated aluminium with
non-conductive base
Weight Single/dual
454g
(16.03oz)
(without heatsink)
Triple
390g (13.77oz)
MTBF
See Note 10
840,000 hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating ambient
25C to +55C
Operating with
25C to +71C
optional heatsink
Operating, case
-25C to +85C
Non-operating amb.
-55C to +105C
Derating above
Linearly to 0 Watts
+85C case
at +100C
Cooling
Free-air convection
cooled or conduction
Relative humidity
Non-condensing
5% to 95% RH
Altitude
Operating
10,000 feet max.
Non operating
40,000 feet max.
Vibration, 5Hz to 500Hz Pressure
2.5G rms (approx.)
Recommended for new design-ins
WR-K SERIES
Single, dual and triple output
[ 2 YEAR WARRANTY ]
Low profile 0.91 inch high
Efficiencies to 84%
UL approved (Single outputs)
2:1 input range
PCB or chassis mounting
Pi input filter
OVP on all outputs
WR-K Series devices are efficient, high power DC/DC converters with single,
dual and triple outputs supplying 50 to 60 Watts. Their low profile 3.5 x 5.5 x
0.91 inch package provides a power density of 3.4 Watts per cubic inch.
Efficiencies range from 78% to 84%. These converters feature unique dual
power stages utilising forward converters with MOSFET switching at 100kHz. A
Pi network input filter is also included. High efficiency is virtually constant down
to 30% output loading. Other features include output short circuit protection,
overvoltage protection, remote sensing of primary output, input surge protection
and remote on/off control. The 2:1 input voltage ranges are 9 to 18VDC, 18 to
36VDC and 36 to 72VDC. Typical applications for WR-K Series power supplies
include telecoms, distributed power systems and industrial automation.
SPECIFICATION
All specifications are typical at nominal input, full load at 25C unless otherwise stated
PAGE 1
INPUT
OUTPUT
OUTPUT
OUTPUT
OUTPUT
INPUT
TYPICAL
CASE
MODEL
VOLTAGE
VOLTAGE 1
VOLTAGE 2
VOLTAGE 3
POWER
CURRENT
(1)
EFFICIENCY
OPTION
(2)
NUMBER
SINGLE OUTPUT
9-18VDC
5V@10A
50W
5.3A
78%
WR12S05/50K
9-18VDC
12V@5A
60W
6.3A
80%
-1, -3
WR12S12/60K
9-18VDC
15V@4A
60W
6.3A
80%
-1, WR12S15/60K
18-36VDC
5V@10A
50W
2.7A
78%
-1, -3
WR24S05/50K
18-36VDC
12V@5A
60W
3.1A
80%
-1, -3
WR24S12/60K
18-36VDC
15V@4A
60W
3A
80%
-1
WR24S15/60K
36-72VDC
5V@10A
50W
1.3A
78%
-1
WR48S05/50K
36-72VDC
12V@5A
60W
1.6A
80%
-1
WR48S12/60K
36-72VDC
15V@4A
60W
1.6A
80%
-1
WR48S15/60K
DUAL OUTPUT, Note 11
9-18VDC
5V@5A
5V@5A
50W
5.2A
80%
-1
WR12D05/50K
9-18VDC
12V@2.5A
12V@2.5A
60W
6.1A
82%
-1
WR12D12/60K
9-18VDC
15V@2A
15V@2A
60W
6.1A
82%
-1
WR12D15/60K
9-18VDC
5V@5A
12V@2.5A
55W
5.66A
81%
-1, -3
WR12D05-12/55K
18-36VDC
12V@2.5A
12V@2.5A
60W
3.05A
82%
-1, -3
WR24D12/60K
18-36VDC
15V@2A
15V@2A
60W
3.05A
82%
-1, -3
WR24D15/60K
18-36VDC
5V@5A
12V@2.5A
55W
2.83A
81%
-1, -3
WR24D05-12/55K
36-72VDC
5V@5A
5V@5A
50W
1.27A
82%
-1
WR48D05/50K
36-72VDC
12V@2.5A
12V@2.5A
60W
1.49A
84%
-1
WR48D12/60K
36-72VDC
5V@5A
12V@2.50A
55W
1.4A
82%
-1
WR48D05-12/55K
TRIPLE OUTPUT, Note 11
9-18VDC
+5V@5A
12V@1.25A
+12V@1.25A
55W
5.72A
80%
-1
WR12T05-12/55K
9-18VDC
+5V@5A
15V@1A
+15V@1A
55W
5.72A
80%
-1, -3
WR12T05-15/55K
18-36VDC
+5V@5A
12V@1.25A
+12V@1.25A
55W
2.83A
81%
-1, -3
WR24T05-12/55K
18-36VDC
+5V@5A
15V@1A
+15V@1A
55W
2.83A
81%
-1, -3
WR24T05-15/55K
36-72VDC
+5V@5A
12V@1.25A
+12V@1.25A
55W
1.4A
82%
-1
WR48T05-12/55K
36-72VDC
+5V@5A
15V@1A
+15V@1A
55W
1.4A
82%
-1
WR48T05-15/55K
36-72VDC
+12V@2.5A
5V@0.5A
+5V@5A
57.5W
1.46A
83%
-1
WR48T12-05/55K
36-72VDC
+15V@2A
5V@0.5A
+5V@5A
57.5W
1.46A
83%
-1
WR48T15-05/55K
Notes
1
At nominal input voltage 12, 24 or 48VDC, full load.
2
To order the optional heatsink on the PC mount model, add the suffix '-1'
to the model number e.g. WR24D05-12/55K-1. To order the chassis
mount version with barrier terminal strip, add the suffix '-3' to the model
number e.g. WR24D05-12/55K-3. Limit one option per unit.
3
No minimum load required for operation.
4
5V outputs clamped at 6.8V; 12V or 15V outputs clamped at 18V.
5
Can compensate for up to 1V drop between converter and load (all single-
output versions, and output 1 of dual-output and triple-output versions).
6
Remote sense is provided on all singles, and output #1 of duals and triples.
If remote sense is not being utilised on single output units, for normal
operation pin 14 should be jumpered to pin 10 and pin 12 to pin 8. For
dual output units, if remote sense is not being utilised, connect pin 11 to
pin 10 and pin 8 to pin 9. Remote sense can compensate up to 1V drop
between converter and load.
7
Single output models: to trim up connect pin 13 to pin 12 through a 10k
resistor; to trim down, connect pin 13 to pin 14 through a 10k
resistor.
8
Dual output models: the trim facility is provided only for output #2. To trim
up connect pin 13 to pin 12 through a 10k
resistor; to trim down connect
pin 13 to pin 14 through a 10k
resistor.
9
In many cases, the isolation specification may be upgraded.
10 MTBF figures are based on actual product performance.
11 The two-stage design of the WR-K Series provides isolation between
outputs which means outputs can be referenced as either positive or
negative. On dual output models, the outputs can be referenced as positive
or negative. On triple output models. The 5V main output is isolated from
the auxiliary outputs. No load sharing is possible.
12 For reverse input voltage protection, connect an external fuse in series with
the input.
13 Fixed frequency design provides for easier input filtering and better noise
performance.
14 Standard specifications are conservative and can be optimised for specific
applications. In particular, converter start-up at lower than specified
temperature, wider input voltage range, and, output voltage adjustment are
all relatively simple modifications to the standard product. Consult factory
for details.
International Safety Standard Approvals
UL478 File No. E131987 (48V)
50 to 60 Watt
Wide input DC/DC converters
DC/DC CONVERTERS
|
50-60W DC
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