QW030A Lineage Power, QW030A Datasheet - Page 10

• Manufacturer Part Number: QW030A
• Description: CONVERTER DC/DC 5V 30W OUT
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW030A

• Output: 5V
• Number Of Outputs: 1
• Power (watts): 30W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 5 VDC @ 6A
• Size / Dimension: 2.28" L x 1.45" W x 0.50" H (57.9mm x 36.8mm x 12.7mm)
• Power (watts) - Rated: 30W
• Operating Temperature: -40°C ~ 105°C
• Efficiency: 86%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: No RoHS Version Available

18 Vdc to 36 Vdc or 36 Vdc to 75 Vdc Inputs
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. The case temperature
should be measured at the position indicated in
Figure 8.
Note: Top view, pin locations are for reference only.
Figure 8. QC/QW030-Series Case Temperature
The temperature at this location should not exceed
105 °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 105 °C, you can limit this temperature to a
lower value for extremely high reliability.
10
10
Measurements shown in millimeters and (inches).
(0.55)
14
Measurement Location
V
ON/OFF
V
I
I
(+)
(-)
33 (1.30)
(+)SENSE
(-)SENSE
V
TRIM
V
O
O
(+)
(–)
8-2104(C).a
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figures 9 and 10 show the
maximum power that can be dissipated by the module
without exceeding the maximum case temperature ver-
sus local ambient temperature (T
tion through 3 m/s (600 ft./min.).
Systems in which these power modules may be used
typically generate natural convection airflow rates of
0.3 ms
ponents in the system. Therefore, the natural convec-
tion condition represents airflow rates of up to 0. 3ms
(60 ft./min.). Use of Figure 9 is shown in the following
example.
Example
What is the minimum airflow necessary for a QW030A
operating at V
maximum ambient temperature of 89 °C?
Solution
Given: V
Determine P
Determine airflow (v) (Use Figure 9.):
Figure 9. QW030A, F Forced Convection Power
–1
7
6
5
4
3
2
1
0
I
T
P
v = 1.0 m/s (200 ft./min.)
40
O
(60 ft./min.) due to other heat-dissipating com-
A
I
D
NATURAL CONVECTION
= 48 V
= 3.5 A
Derating with No Heat Sink; Either
Orientation
= 89 °C
= 3 W
D
1.0 ms
2.0 ms
3.0 ms
I
50
MAX AMBIENT TEMPERATURE, T
(Use Figure 12.):
= 48 V, an output current of 3.5 A, and a
-1
-1
-1
60
(200 ft./min.)
(400 ft./min.)
(600 ft./min.)
70
Tyco Electronics Corp.
A
80
) for natural convec-
MAX CASE TEMP.
90
April 2002
A
(°C)
100 110
8-3406(F)
–1