LXR1701-6 Просмотр технического описания (PDF) - Power-One Inc.
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LXR1701-6 Datasheet PDF : 21 Pages
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X Series Data Sheet
®
375, 500 Watt AC-DC and DC-DC DIN-Rail Converters
Parallel Operation
Double-output models exhibit an independent
control logic each. Both outputs can be connected
in parallel, provided that the options S (included in
M1) and R are not used, since they influence only
the 2nd output. The two pairs of powertrains share Vi
the current due to their output voltage droop
characteristic.
Up to 3 converters with the same output voltage
may be operated in parallel. It is possible to parallel
W Series with X Series converters.
Reasonable current sharing is achieved by the
droop characteristic. Correct mode of operation is
highly dependent upon the wiring of the converters
and the impedance of these wires. Use wires with
equal length and equal cross sections of min. 1.5
mm 2. The best results for parallel operation can be
achieved with the wiring shown in fig. 6.
Parallel operation of single-output models using Vi
option R (output voltage adjust) is possible, but not
recommended. Refer to fig. 6; the connections
between the pins 8 and 9 (both Vo–) should be as
short as possible.
Note: Parallel operation is not possible, if a
temperature sensor is connected, as the sensor
eliminates the output voltage droop.
11053a
AUX1 10
Vo- 9
Vo- 8
Vo+ 7
Vo+ 6
Vo- 5
Vo- 4
Vo+ 3
Vo+ 2
AUX1 10
Vo- 9
Vo- 8
Vo+ 7
Vo+ 6
Vo- 5
Vo- 4
Vo+ 3
Vo+ 2
VR
+
Load
_
Series Connection
Series connection of several outputs up to 150 V is
possible. The output is not SELV, when the max.
output voltage exceeds 60 V.
Vi
AUX1 10
Vo- 9
Vo- 8
Vo+ 7
Output Characteristic and Protection
Vo+ 6
The output characteristic, individual for each group
Vo- 5
of powertrains, is rectangular with a droop to ease
Vo- 4
parallel operation; see fig. 7.
However, a 50% higher output current is possible
for a short time, such allowing start-up of loads or
Vo+ 3
Vo+ 2
Additional wiring for output currents Io ≥ 10 A
Additional wiring, if using the R-input
charging of capacitors; see fig. 8.
Fig. 6
Each output is independently protected against
internal overvoltage by means of a second control
Wiring for single-output converters connected in parallel. Additional
wiring for higher output currents and with the use of option R is shown.
loop. When the output voltage exceeds Vo L, the
respective output is disabled.
Vo /Vo nom
05181a
Overtemperature Protection
Each powertrain is independently protected against over- 1.0
temperature by a built-in temperature sensor. When a certain 0.8
temperature is reached, the concerned powertrain reduces
its output power continuously.
0.6
0.4
0.2
0
Io /Io nom
0
0.2
0.4
0.6
0.8
1.0
1.2
Fig. 7
Vo versus Io (single-output model, typical values).
BCD20021-G Rev AC1, 13-May-2013
Page 10 of 21
www.power-one.com
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