Q48SE12025NRFA Datasheet, PDF (10/14 Pages) Delta Electronics, Inc. – Delphi Series Q48SE, Quarter Brick Family DC/DC Power Modules 38~75V in, 11.8V/25A out, 300W

THERMAL CURVES
(WITHOUT HEAT SPREADER)
AIRFLOW
THERMAL CURVES
(WITH HEAT SPREADER)
AIRFLOW
NTC RESISTOR
HOT SPOT 1
Figure 18: * Hot spot 1& NTC resistor temperature measured
points. The allowed maximum hot spot 1 temperature is defined
at 118℃
Q48SE12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation)
25
Natural
20
Convection
100LFM
15
200LFM
300LFM
10
400LFM
500LFM
5
600LFM
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 19: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,without heat spreader)
HOT SPOT 2
Figure 20: * Hot spot 2 temperature measured point. The
allowed maximum hot spot 2 temperature is defined at 112℃
Q48SE12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation,With Heatspreader)
25
Natural
Convection
20
100LFM
200LFM
15
300LFM
10
400LFM
500LFM
5
600LFM
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 21: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,with heat spreader)
DS_Q48SE12025_06242013
10