Q48SD Datasheet, PDF (21/24 Pages) Delta Electronics, Inc. – Industry standard, DOSA compliant pin out

THERMAL CURVES
(WITHOUT HEAT SPREADER)
AIRFLO W
THERMAL CURVES
(WITH HEAT SPREADER)
AIRF LOW
NTC R ESI STOR
HOT SPOT 1
Figure 22: * Hot spot 1& NTC resistor temperature measured
points
Q48SD12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation)
25
Natural
Convection
20
100LFM
200LFM
15
300LFM
400LFM
10
500LFM
600LFM
5
HOT SPOT 2
Figure 24: * Hot spot 2 temperature measured point
Q48SD12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation,With Heat Spreader)
25
Natural
Convection
20
100LFM
200LFM
15
300LFM
10
400LFM
5
500LFM
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature ( )
Figure 23: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-, without heat spreader)
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature ( )
Figure 25: Output current vs. ambient temperature and air velocity
@Vin=48V(Transverse Orientation, airflow from Vin+ to Vin-,with
heat spreader)
21
DS_Q48SD12025_05032012