Q48SH12033NRFH Delta Electronics, Q48SH12033NRFH Datasheet - Page 9
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Q48SH12033NRFH
Manufacturer Part Number
Q48SH12033NRFH
Description
MODULE DC/DC 1/4 BRICK 12V 33A
Manufacturer
Delta Electronics
Series
DELPHIr
Type
Isolated with UVLOr
Specifications of Q48SH12033NRFH
Output
12V
Number Of Outputs
1
Power (watts)
400W
Mounting Type
Through Hole
Voltage - Input
36 ~ 75V
Package / Case
6-DIP Module, 1/4 Brick
1st Output
12 VDC @ 33A
Size / Dimension
2.28" L x 1.45" W x 0.50" H (57.9mm x 36.8mm x 12.7mm)
Operating Temperature
-40°C ~ 103°C
Power (watts) - Rated
396W
Efficiency
94.5%
Approvals
cUL, TUV, UL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
3rd Output
-
2nd Output
-
4th Output
-
Other names
941-1003
DS_Q48SH12033_09192008
THERMAL CONSIDERATIONS
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
Figure 17: Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit may
be affected.
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
MEASURED BELOW
following
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
FACING PWB
encountered
figure
AIR FLOW
shows
in
PWB
50.8 (2.0”)
MODULE
12.7 (0.5”)
the
most
wind
electronics
tunnel
Figure 18: Temperature measurement location
* The allowed maximum hot spot temperature is defined at 121
Figure 19: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation)
THERMAL CURVES
33
30
27
24
21
18
15
12
9
6
3
0
25
Output Current (A )
30
Convectio n
Q4 8SH 12033(Sta ndard) Outpu t Current vs. Amb ient Temperatu re and Air Ve locity
Natural
35
100L FM
200LFM
40
300LFM
4 00LFM
45
@Vin = 48V (Tran sverse Orie ntation )
50
55
60
65
600LFM
70
5 00LFM
Ambient Temperature ( ℃ )
75
80
℃
85
9