Data Sheet
QPW050/060 Series Power Modules; DC-DC converters
36-75Vdc Input; 1.2Vdc to 3.3Vdc Output
March 27, 2008
The following figures provide thermal derating characteristics.
50
45
40
35
30
25
20
15
10
60
50
40
30
20
10
0
NATURAL
CONVECTION
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
5
0
25 30 35 40 45 50 55 60 65 70 75 80 85
25 30 35 40 45 50 55 60 65 70 75 80 85
LOCAL AMBIENT TEMPERATURE, TA (°C)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 41. Output Power Derating for QPW050A0F (Vo
= 3.3V) in Longitudinal Orientation with no baseplate;
Airflow Direction From Vin(–) to Vout(--); Vin = 48V.
Figure 44. Output Power Derating for QPW060A0G (Vo
= 2.5V) in Transverse Orientation with no baseplate;
Airflow Direction From Vin(–) to Vin(+); Vin = 48V.
50
40
30
60
50
40
NATURAL
CONVECTION
30
20
20
NATURAL CONVECTION
1.0 m/s (200 ft./min.)
1.0 m/s (200 ft./min.)
10
10
2.0 m/s (400 ft./min.)
2.0 m/s (400 ft./min.)
0
0
25 30 35 40 45 50 55 60 65 70 75 80 85
25 30 35 40 45 50 55 60 65 70 75 80 85
LOCAL AMBIENT TEMPERATURE, TA (°C)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 42. Output Power Derating for QPW050A0F (Vo
= 3.3V) in Transverse Orientation with no baseplate;
Airflow Direction From Vin(–) to Vin(+); Vin = 48V.
Figure 45. Output Power Derating for QPW060A0Y (Vo
= 1.8V) in Longitudinal Orientation with no baseplate;
Airflow Direction From Vin(–) to Vout(--); Vin = 48V.
60
50
40
60
50
40
NATURAL
CONVECTION
NATURAL
CONVECTION
30
30
20
20
1.0 m/s (200 ft./min.)
1.0 m/s (200 ft/min)
10
10
2.0 m/s (400 ft/min)
2.0 m/s (400 ft./min.)
0
0
25 30 35 40 45 50 55 60 65 70 75 80 85
25 30 35 40 45 50 55 60 65 70 75 80 85
LOCAL AMBIENT TEMPERATURE, TA (°C)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 43. Output Power Derating for QPW060A0G (Vo Figure 46. Output Power Derating for QPW060A0Y (Vo
= 2.5V) in Longitudinal Orientation with no baseplate;
Airflow Direction From Vin(–) to Vout(--); Vin = 48V.
= 1.8V) in Transverse Orientation with no baseplate;
Airflow Direction From Vin(–) to Vin(+); Vin = 48V.
LINEAGE POWER
17
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
