Q48SG12034NRFA Datasheet, PDF (22/26 Pages) Delta Electronics, Inc. – Delphi Series Q48SG Quarter Brick Family Full Digital Control DC/DC Power Modules:

THERMAL CURVES
(WITHOUT HEAT SPREADER)
AIRFLOW
THERMAL CURVES
(WITH HEAT SPREADER)
AIRFLOW
NTC RESISTOR
HOT SPOT 1
Figure 22: * Hot spot 1& NTC resistor temperature measured
points. the allowed maximum hot spot 1 temperature is defined
at 118℃
Q48SG12034(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
35
@Vin = 48V (Transverse Orientation)
600LFM
30
500LFM
25
Natural
20
Convection
100LFM
15
200LFM
10
300LFM
5
400LFM
0
25
30
35
40
45
50
55
60
65
70
75
Ambient
80
Temperature
(8℃⁵ )
Figure 23: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-, without heat spreader)
HOT SPOT 2
Figure 24: * Hot spot 2 temperature measured point. The allowed
maximum hot spot 2 temperature is defined at 105℃
Q48SG12034(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation,With Heat Spreader)
35
600LFM
30
500LFM
25
Natural
Convection
20
100LFM
15
200LFM
10
300LFM
5
400LFM
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)
22
DS_Q48SG12034_06272013