QW050F1 Lineage Power, QW050F1 Datasheet - Page 11

• Manufacturer Part Number: QW050F1
• Description: CONVERTER DC/DC 3.3V 33W OUT
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW050F1

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 33W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 3.3 VDC @ 10A
• Size / Dimension: 2.28" L x 1.45" W x 0.50" H (57.9mm x 36.8mm x 12.7mm)
• Power (watts) - Rated: 33W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 81%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

April 2008
Feature Descriptions
Output Voltage Set-Point Adjustment
(Trim)
Figure 20. Circuit Configuration to Increase
Figure 21. Resistor Selection for Increased Output
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
100k
10M
10k
1M
V
ON/OFF
CASE
V
(continued)
I
I
0
(+)
(–)
Output Voltage
Voltage
% CHANGE IN OUTPUT VOLTAGE (Δ %)
SENSE(+)
SENSE(–)
2
V
TRIM
V
O
O
(+)
(-)
4
(continued)
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 50 W
6
R
adj-up
8
R
LOAD
8-715 (C).b
8-2580 (C)
10
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 primary or second-
ary referenced remote on/off signal for at least
1.0 second.
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
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.
Note: Top view, pin locations are for reference only.
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.
Measurements shown in millimeters and (inches).
(0.55)
14
Location
V
ON/OFF
V
I
I
(+)
(-)
33 (1.30)
(+)SENSE
(-)SENSE
V
TRIM
V
O
O
(+)
(–)
8-2104 (C)
C
)
11