JAHW075F1 Lineage Power, JAHW075F1 Datasheet - Page 13

• Manufacturer Part Number: JAHW075F1
• Description: CONVERTER DC/DC 3.3V 50W OUT
• Manufacturer: Lineage Power
• Series: JAHWr
• Type: Isolated with Remote On/Offr

Specifications of JAHW075F1

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 50W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 9-DIP Module
• 1st Output: 3.3 VDC @ 15A
• Size / Dimension: 2.40" L x 2.28" W x 0.50" H (61mm x 57.9mm x 12.7mm)
• Power (watts) - Rated: 50W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 88.6%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

April 2008
Thermal Considerations
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figure 24 shows the maximum
power that can be dissipated by the module without
exceeding the maximum case temperature versus local
ambient temperature (T
through 4 m/s (800 ft./min.).
Note that the natural convection condition was mea-
sured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.);
however, systems in which these power modules may
be used typically generate natural convection airflow
rates of 0.3 m/s (60 ft./min.) due to other heat dissipat-
ing components in the system. The use of Figure 24 is
shown in the following example.
Example
What is the minimum airflow necessary for a
JAHW100F operating at V
20 A, and a maximum ambient temperature of 55 °C?
Solution
Given: V
Determine P
Determine airflow (v) (Use Figure 24.):
Figure 24. Forced Convection Power Derating with
Lineage Power
12
9
6
3
0
0
I
T
P
v = 0.51 m/s (100 ft./min.)
O
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
4.0 m/s (800 ft./min.)
A
I
D
10
= 20 A
= 48 V
= 55 °C
= 8.0 W
No Heat Sink; Either Orientation
LOCAL AMBIENT TEMPERATURE, T
D
CONVECTION
(Use Figure 27.):
20
NATURAL
30
A
40
) for natural convection
I
= 48 V, an output current of
50
60
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
(continued)
70
A
80
(°C)
90
8-2504 (F)
100
Figure 25. JAHW050F Power Dissipation vs.
Figure 26. JAHW075F Power Dissipation vs.
Figure 27. JAHW100F Power Dissipation vs.
10
9
8
7
6
5
4
3
2
1
0
0
6
5
4
3
2
1
0
0
8
7
6
5
4
3
2
1
0
0
V
V
V
2
I
I
I
= 75 V
= 48 V
= 36 V
Output Current at 25 °C
Output Current at 25 °C
Output Current at 25 °C
1
1
V
V
V
4
I
I
I
2
= 75 V
= 48 V
= 36 V
OUTPUT CURRENT, I
2
3
6
OUTPUT CURRENT, I
OUTPUT CURRENT, I
4
3
8
5
10
4
6
7
12
5
8
O
14
9 10
(A)
6
O
16
O
7
(A)
11 12 13 14 15
(A)
V
V
V
I
I
I
18 20
= 75 V
= 48 V
= 36 V
8
9
8- 3357 (F)
8-3355 (F)
8-3356 (F)
10
13