JAHW100Y1 Lineage Power, JAHW100Y1 Datasheet - Page 13

• Manufacturer Part Number: JAHW100Y1
• Description: CONVERTER DC/DC 1.8V 36W OUT
• Manufacturer: Lineage Power
• Series: JAHWr
• Type: Isolated with Remote On/Offr

Specifications of JAHW100Y1

• Output: 1.8V
• Number Of Outputs: 1
• Power (watts): 36W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 9-DIP Module
• 1st Output: 1.8 VDC @ 20A
• Size / Dimension: 2.40" L x 2.28" W x 0.50" H (61mm x 57.9mm x 12.7mm)
• Power (watts) - Rated: 36W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 88.4%
• 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
Introduction
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.
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figure 26 shows the maximum
power that can be dissipated by the module without
exceeding the maximum case temperature versus local
ambient temperature (T
through 3 m/s (600 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 26 is
shown in the following example.
Example
What is the minimum airflow necessary for a
JAHW100Y operating at V
20 A, and a maximum ambient temperature of 65 °C?
Solution
Given: V
Determine P
Determine airflow (v) (Use Figure 26.):
Lineage Power
I
T
P
v = 0.46 m/s (90 ft./min.)
O
A
I
D
= 20 A
= 48 V
= 65 °C
= 5.2 W
D
(Use Figure 29.):
(continued)
A
) for natural convection
I
= 48 V, an output current of
dc-dc Converters; 36 to 75 Vdc Input, 1.8 Vdc Output; 18 W to 36 W
(continued)
Figure 26. Forced Convection Power Derating with
Figure 27. JAHW050Y Power Dissipation vs.
4.5
3.5
2.5
1.5
0.5
7
6
5
4
3
2
1
0
4
3
2
1
0
0
0
3.0 m/s (600 ft./min.)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.1 m/s (20 ft./min.)
(NATURAL CONVECTION)
No Heat Sink; Either Orientation
Output Current at 25 °C
10
1
LOCAL AMBIENT TEMPERATURE, T
LOCAL AMBIENT TEMPERATURE, T
20
2
30
3
40
4
50
5
60
6
70
7
V
V
V
I
I
I
= 75 V
= 48 V
= 36 V
80
8
A
A
(°C)
(°C)
90 100
9 10
8-3246 (F)
8-3247 (F)
13