Datasheet
DS_Q48SQ12033_09272013
10
THERMAL CURVES
(WITHOUT HEAT SPREADER)
NTC RESISTOR
HOT SPOT1
AIRFLOW
Figure 21: * Hot spot1 and NTC resistor temperature measured
point. The allowed maximum hot spot1 temperature is defined
at 111
℃
.
0
5
10
15
20
25
30
25 30 35 40 45 50 55 60 65 70 75 80 85
Output Current (A)
Ambient Temperature (℃)
Q48SQ12033(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
300LFM
200LFM
400LFM
Natural
Convection
100LFM
600LFM
500LFM
Figure 22: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,without heat spreader)
THERMAL CURVES
(WITH HEAT SPREADER)
HOT SPOT2
AIRFLOW
Figure 23: * Hot spot2 temperature measured point. The
allowed maximum hot spot2 temperature is defined at 105
℃
.
0
4
8
12
16
20
24
28
32
25 30 35 40 45 50 55 60 65 70 75 80 85
Output Current (A)
Ambient Temperature (℃)
Q48SQ12033(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation,With Heatspreader)
300LFM
200LFM
400LFM
500LFM
Natural
Convection
100LFM
600LFM
Figure 24: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,with heat spreader)