QW030CL1 Lineage Power, QW030CL1 Datasheet - Page 11

• Manufacturer Part Number: QW030CL1
• Description: CONVERT DC/DC +-15V 30W OUT
• Manufacturer: Lineage Power
• Series: QWr
• Type: Isolated with Remote On/Offr

Specifications of QW030CL1

• Output: ±15V
• Number Of Outputs: 2
• Power (watts): 30W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 8-DIP Module
• 1st Output: 15 VDC @ 1.75A
• 2nd Output: -15 VDC @ 1.75A
• 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: 88%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

October 2008
Thermal Considerations
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figures 8 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 0.3 ms
(60 ft./min.). Use of Figure 8 is shown in the following
example.
Example
What is the minimum airflow necessary for a
QW030BK operating at V
1.5 A, each and a maximum ambient temperature of 89
°C?
Solution
Given: V
Determine P
Determine airflow (v) (Use Figure 8):
Figure 8. QW030BK POWER DERATING CURVE
Lineage Power
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
–1
I
T
P
v = 3.0 m/s (600 ft./min.)
O1
(60 ft./min.) due to other heat-dissipating com-
3.0 m/s (600 ft./min.)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
NATURAL CONVECTION
A
I
D
= 48 V
= 89 °C
= 4.5 W
= 1.5 A, I
40
D
(Use Figure 9):
LOCAL AMBIENT TEMPERATURE, T
50
O2
60
= 1.5 A
I
= 48 V, an output current of
70
MAX CASE TEMP.
80
A
) for natural convec-
(continued)
90
100
A
( C)
110
1-0206
–1
18 Vdc to 36 Vdc or 36 Vdc to 75 Vdc Inputs
Figure 9. QW030BK Power dissipation With
Figure 10. QW030BK Power Dissipation with
6
5
4
3
2
1
0
6
5
4
3
2
1
0
0
V
V
V
V
Balanced Loads
Unbalanced Loads with Io1 = 0.5 A
V
V
I
I
I
I
I
I
= 75 V
= 48 V
= 36 V
= 75 V
= 48 V
= 36 V
0.5
0.5
OUTPUT CURRENT, I
OUTPUT CURRENT, I
1
1
1.5
1.5
2
O
O
2 (A)
2
1
=
2.5
I
O
2 (A)
2.5
3.0
1-0204
1-0205
11