Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
10
20
30
40
50
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
NC - 30 LFM (0.15 m/s)
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
10
20
30
40
50
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
NC - 30 LFM (0.15 m/s)
Fig. 1: Available load current vs. ambient air temperature and
airflow rates for converter with G height pins mounted vertically
with air flowing from pin 1 to pin 3, MOSFET temperature 120 C,
Vin = 48 V
Note: NC – Natural convection
Fig. 2: Available load current vs. ambient air temperature and
airflow rates for converter with G height pins mounted horizontally
with air flowing from pin 1 to pin 3, MOSFET temperature 120 C,
Vin = 48 V
Load Current [Adc]
0 8 16 24 32 40 48
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
72 V
48 V
36 V
Load Current [Adc]
0 8 16 24 32 40 48
Efficiency
0.75
0.80
0.85
0.90
0.95
1.00
70 C
55 C
40 C
Fig. 3: Efficiency vs. load current and input voltage for converter
mounted vertically with air flowing from pin 1 to pin 3 at a rate of
300 LFM (1.5 m/s) and Ta = 25 C.
Fig. 4: Efficiency vs. load current and ambient temperature for
converter mounted vertically with Vin = 48 V and air flowing from
pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s)
Load Current [Adc]
0 8 16 24 32 40 48
Power Dissipation [W]
0.00
5.00
10.00
15.00
20.00
25.00
72 V
48 V
36 V
Load Current [Adc]
0 8 16 24 32 40 48
Power Dissipation [W]
0.00
5.00
10.00
15.00
20.00
25.00
70 C
55 C
40 C
Fig. 5: Power dissipation vs. load current and input voltage for
converter mounted vertically with air flowing from pin 1 to pin 3 at a
rate of 300 LFM (1.5 m/s) and Ta = 25
C
Fig. 6: Power dissipation vs. load current and ambient temperature
for converter mounted vertically with Vin = 48 V and air flowing
from pin 1 to pin 3 at a rate of 200 LFM (1.0 m/s)
