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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April 2008
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W and 75 W
Feature Descriptions
(continued)
Output Voltage Set-Point Adjustment
(Trim)
(continued)
V
(+)
V
(+)
I
O
ON/OFF
SENSE(+)
CASE
TRIM
V
(–)
SENSE(–)
I
V
(-)
O
Figure 20. Circuit Configuration to Increase
Output Voltage
10M
1M
100k
0
2
4
% CHANGE IN OUTPUT VOLTAGE ( Δ%)
Figure 21. Resistor Selection for Increased Output
Voltage
Output Overvoltage Protection
The output overvoltage protection consists of circuitry
that monitors the voltage on the output terminals. If the
voltage on the output terminals exceeds the overvolt-
age protection threshold, then the module will shut
down and latch off. The overvoltage latch is reset by
either cycling the input power for 1.0 second or by tog-
gling the on/off signal for 1.0 second.
Lineage Power
Overtemperature Protection
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. The cir-
cuit shuts down and latches off the module when the
maximum case temperature is exceeded. The module
can be restarted by cycling the dc input power for at
least 1.0 second or by toggling the remote on/off signal
for at least 1.0 second.
R
adj-up
R
LOAD
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
8-715 (C).b
environments; however, sufficient cooling should be
provided to help ensure reliable operation of the unit.
Heat-dissipating components inside the unit are ther-
mally coupled to the case. Heat is removed by conduc-
tion, convection, and radiation to the surrounding
environment. Proper cooling can be verified by mea-
suring the case temperature. Peak temperature (T
occurs at the position indicated in Figure 22.
(0.55)
6
8
10
Note: Top view, pin locations are for reference only.
Measurements shown in millimeters and (inches).
8-2855 (F)
Figure 22. Case Temperature Measurement
The temperature at this location should not exceed
100 °C. The output power of the module should not
exceed the rated power for the module as listed in the
Ordering Information table.
Although the maximum case temperature of the power
modules is 100 °C, you can limit this temperature to a
lower value for extremely high reliability.
33 (1.30)
14
V
V
(+)
O
I
(+)SENSE
ON/OFF
TRIM
(-)SENSE
V
(-)
V
I
O
Location
)
C
(+)
(–)
8-2104 (C)
11

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