JC075F1 Lineage Power, JC075F1 Datasheet - Page 11

• Manufacturer Part Number: JC075F1
• Description: CONVERTER DC/DC 3.3V 50W OUT
• Manufacturer: Lineage Power
• Series: JC075r
• Type: Isolated with Remote On/Offr

Specifications of JC075F1

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 50W
• Mounting Type: Through Hole
• Voltage - Input: 18 ~ 36V
• 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: 81%
• Approvals: CSA, UL, VDE
• Product: Isolated
• Output Power: 12 W
• Input Voltage Range: 18 V to 36 V
• Input Voltage (nominal): 28 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 3.7 A
• Isolation Voltage: 1.5 KV
• Package / Case Size: DIP
• Output Type: Isolated
• Output Voltage: 3.3 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: No

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 (Tc)
occurs at the position indicated in Figure 22.
Note: Top view, pin locations are for reference.
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.
For additional information on these modules, refer to the
Thermal Management JC-, JFC-, JW-, and JFW-Series
50 W to 150 W Board-Mounted Power Modules Technical
Note (TN97-008EPS).
7.6 (0.3)
Measurements shown in millimeters and (inches).
Data Sheet
March 2008
Lineage Power
Location
V
ON/OFF
CASE
V
I
I
(+)
(–)
38.0 (1.50)
+ SEN
– SEN
V
TRIM
V
O
O
(+)
(–)
MEASURE CASE
TEMPERATURE HERE
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
8-716 f
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figure 23 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 23 is
shown in the following example.
Example
What is the minimum airflow necessary for a JC100F
operating at nominal line, an output current of 20 A,
and a maximum ambient temperature of 40 °C?
Solution
Given: V
Determine P
Determine airflow (v) (Use Figure 23.):
Figure 23. Forced Convection Power Derating with
35
30
25
20
15
10
5
0
0
I
T
P
v = 2.3 m/s (450 ft./min.)
O
A
I
D
= 20 A
= 28 V
= 40 °C
= 18.2 W
0.1 m/s (NAT. CONV.)
10
No Heat Sink; Either Orientation
D
(Use Figure 26.):
LOCAL AMBIENT TEMPERATURE, T
20
(20 ft./min.)
30
A
) for natural convection
40
50
60
4.0 m/s (800 ft./min.)
3.5 m/s (700 ft./min.)
3.0 m/s (600 ft./min.)
2.5 m/s (500 ft./min.)
2.0 m/s (400 ft./min.)
1.5 m/s (300 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
70
A
80
(˚C)
90
8-1150 a
100
11