DS_Q48SE12033_06242013

E-mail: DCDC@delta.com.tw

http://www.deltaww.com/dcdc

P10

THERMAL CURVES

(WITH HEAT SPREADER)

Figure 20: * Hot spot 2 temperature measured point. The allowed

maximum hot spot 2 temperature is defined at 108

℃

Figure 21: Output current vs. ambient temperature and air velocity

@Vin=48V(Transverse Orientation, airflow from Vin+ to Vin-,with

heat spreader)

AIRFLOW

HOT SPOT 2

0

3

6

9

12

15

18

21

24

27

30

33

25

30

35

40

45

50

55

60

65

70

75

80

85

Output Current(A)

Ambient Temperature (℃)

Q48SE12033(Standard) Output Current vs. Ambient Temperature and Air Velocity

@Vin = 48V (Transverse Orientation, With Heatspreader)

Natural

Convection

100LFM

200LFM

300LFM

400LFM

600LFM

500LFM

THERMAL CURVES

(WITHOUT HEAT SPREADER)

Figure 18: * Hot spot 1& NTC resistor temperature measured

points. The allowed maximum hot spot 1 temperature is defined

at 117

℃

Figure 19: Output current vs. ambient temperature and air

velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to

Vin-,without heat spreader)

AIRFLOW

NTC RESISTOR

HOT SPOT 1

0

3

6

9

12

15

18

21

24

27

30

33

25

30

35

40

45

50

55

60

65

70

75

80

85

Output Current(A)

Ambient Temperature (℃)

Q48SE12033(Standard) Output Current vs. Ambient Temperature and Air Velocity

@Vin = 48V (Transverse Orientation)

Natural

Convection

100LFM

200LFM

300LFM

400LFM

600LFM

500LFM