QW050A1

Manufacturer Part NumberQW050A1
DescriptionCONVERTER DC/DC 5V 50W OUT
ManufacturerLineage Power
SeriesQW
TypeIsolated with Remote On/Off
QW050A1 datasheets

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Specifications of QW050A1

Output5VNumber Of Outputs1
Power (watts)50WMounting TypeThrough Hole
Voltage - Input36 ~ 75VPackage / Case8-DIP Module
1st Output5 VDC @ 10ASize / Dimension2.28" L x 1.45" W x 0.50" H (57.9mm x 36.8mm x 12.7mm)
Power (watts) - Rated50WOperating Temperature-40°C ~ 100°C
Efficiency84%ApprovalsCE, CSA, UL, VDE
Output Current10AInput Voltage48V
Output Voltage5VOutput Power50
Screening LevelIndustrialOperating Temperature Min Deg. C-40C
Operating Temperature Max Deg. C100CProduct Length (mm)36.8mm
Product Depth (mm)57.9mmProduct Height (mm)12.7mm
Mounting StyleThrough HolePin Count8
Lead Free Status / RoHS StatusContains lead / RoHS non-compliant3rd Output-
2nd Output-4th Output-
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dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W and 75 W
Feature Descriptions
(continued)
Remote Sense
(continued)
SENSE(+)
SENSE(–)
V
(+)
V
(+)
I
O
SUPPLY
I
I
V
(-)
V
(–)
I
O
CONTACT
RESISTANCE
Figure 17. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage Set-Point Adjustment
(Trim)
Output voltage trim allows the user to increase or
decrease the output voltage set point of a module. This
is accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(–) pins. The trim resistor should be positioned
close to the module.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and
SENSE(–) pins (R
), the output voltage set point
adj-down
(V
) decreases (see Figure 18). The following equa-
O, adj
tion determines the required external-resistor value to
obtain a percentage output voltage change of ý%.
510
⎛
⎞
R
=
--------- - 10.2
–
kΩ
adj-down
⎝
⎠
Δ%
The test results for this configuration are displayed in
Figure 19. This figure applies to all output voltages.
With an external resistor connected between the TRIM
and SENSE(+) pins (R
), the output voltage set
adj-up
point (V
) increases (see Figure 20).
O, adj
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of ý%.
(
Δ%
)
5.1V
100
+
⎛
O
R
=
---------------------------------------------- -
–
adj-up
⎝
1.225Δ%
The test results for this configuration are displayed in
Figure 21.
The voltage between the V
(+) and V
O
must not exceed the minimum output overvoltage pro-
tection value shown in the Feature Specifications table.
This limit includes any increase in voltage due to
10
10
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 17.
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
The amount of power delivered by the module is
I
O
LOAD
defined as the voltage at the output terminals multiplied
CONTACT AND
by the output current. When using remote sense and
DISTRIBUTION LOSSES
trim, the output voltage of the module can be
8-651 (C).m
increased, which at the same output current would
increase the power output of the module. Care should
be taken to ensure that the maximum output power of
the module remains at or below the maximum rated
power.
V
(+)
I
ON/OFF
CASE
V
(–)
I
Figure 18. Circuit Configuration to Decrease
1M
100k
10k
1k
510
⎞ kΩ
–
--------- -
10.2
⎠
Δ%
Figure 19. Resistor Selection for Decreased
(–) terminals
O
V
(+)
O
SENSE(+)
TRIM
R
adj-down
SENSE(–)
V
(–)
O
Output Voltage
0
10
20
30
% CHANGE IN OUTPUT VOLTAGE (Δ %)
Output Voltage
Lineage Power
April 2008
R
LOAD
8-748 (C).b
40
8-2577 (C)

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