Q48SQ12018NRFH Datasheet, PDF (10/13 Pages) Delta Electronics, Inc. – Delphi Series Q48SQ, Quarter Brick Family DC/DC Power Modules

THERMAL CURVES
(WITHOUT HEAT SPREADER)
AIRFLOW
THERMAL CURVES
(WITH HEAT SPREADER)
AIRFLOW
NTC RESISTOR
HOT SPOT1
Figure 21: * Hot spot1 and NTC resistor temperature measured
point. The allowed maximum hot spot1 temperature is defined
at 115℃.
Q48SQ12018(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation)
18
Natural
15
Convection
100LFM
12
200LFM
9
300LFM
400LFM
6
500LFM
3
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 22: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,without heat spreader)
HOT SPOT2
Figure 23: * Hot spot2 temperature measured point. The
allowed maximum hot spot2 temperature is defined at 108℃.
Q48SQ12018(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation,With Heatspreader)
18
Natural
15
Convection
100LFM
12
200LFM
9
300LFM
6
3
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 24: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,with heat spreader)
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DS_Q48SQ12018_08092013